Intelligent fountain solution circulating refrigerating device for printing machine

Abstract

The utility model discloses an intelligent fountain solution circulating and refrigerating device for a printing machine, which comprises a fountain solution water tank body, a heat exchanger and a three-pump independent circulating system, the three-pump independent circulating system comprises a controller, a circulating pump, an electric control valve and a circulating pipeline; the electric control valve and the circulating pump are respectively and electrically communicated with the controller; the fountain solution water tank body is provided with a plurality of fluid inlets and outlets, and the fluid inlets and outlets are correspondingly communicated with circulating pumps, electric control valves and circulating pipelines of the three-pump independent circulating system to form three liquid independent circulating channels. According to the utility model, the heat exchanger is provided with three groups of fluid passages which operate independently, so that synchronous independent cooling circulation of two paths of hot side fluid is realized, and the design of a three-pump independent circulation system is used for circulation of fountain solution and refrigeration water in three sets of parallel pipeline systems; the used plate heat exchanger can well reduce cost increase caused by energy consumption and faults, and the production efficiency and the market competitiveness are effectively improved.

Description

Technical Field

[0001] This utility model relates to the technical field of printing circulating cooling equipment, specifically an intelligent circulating cooling device for dampening solution in printing presses. Background Technology

[0002] Printing presses are devices used to print text and images. As book and magazine printing companies expand their production scale and increase the variety of products they produce, the differences in printing materials, production efficiency, and application scenarios become increasingly apparent. Therefore, they need to use different types of printing equipment (sheet offset printing presses, rotary offset printing presses, UV offset printing presses, etc.) to meet the needs of book and magazine products, color requirements, production efficiency, and other aspects.

[0003] In book and magazine printing, offset printing presses are primarily used to reproduce text and images. The temperature of the dampening solution in offset printing is crucial for maintaining print quality and controlling the ink-water balance. Excessively high temperatures cause water to evaporate too quickly, affecting the ink-water balance and reducing print quality; conversely, excessively low temperatures may cause the dampening solution to form an overly thick water film on the printing plate, hindering ink adhesion to the image areas. Therefore, maintaining a stable dampening solution temperature ensures good wetting effects and printing stability.

[0004] Therefore, offset printing presses are equipped with independent dampening solution tanks, which typically have built-in cooling devices to precisely control the temperature of the dampening solution and ensure it remains within a stable temperature range during printing. These built-in cooling devices require regular maintenance; otherwise, they are prone to malfunction or reduced cooling effectiveness, affecting the normal operation of the printing press. Since large book and magazine printing companies often own dozens of different types, brands, and models of sheetfed offset presses, rotary offset presses, and commercial rotary offset presses, the independent cooling devices within these numerous damping solution tanks require significant maintenance and energy costs during production. This leads to energy waste, is environmentally unfriendly, and can also increase the ambient temperature, further impacting the energy consumption for dampening solution control and hindering cost control for the company.

[0005] Therefore, there is an urgent need to develop a new intelligent circulating cooling device for dampening solution to replace the independent built-in cooling devices of existing offset printing presses of different types, thereby ensuring production quality and efficiency, reducing enterprise energy consumption and production costs, and solving the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide an intelligent circulating cooling device for dampening solution in printing presses. Through an external heat exchange cooling device and a three-pump independent circulation system, it is used for dual circulation of dampening solution and cooling water, thereby avoiding the increased costs caused by the energy consumption and failure of independent built-in cooling devices, while improving the production efficiency of book and magazine printing.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A smart circulating cooling device for dampening solution in printing presses includes a dampening solution tank body, a heat exchanger, and a three-pump independent circulation system, wherein:

[0009] The heat exchanger is equipped with three sets of independently operating fluid passages, including one set of cold-side fluid passages and two sets of hot-side fluid passages. Each set of fluid passages includes an inlet, an outlet, and an independent flow path.

[0010] The three-pump independent circulation system includes a controller, circulation pumps, electrically controlled valves, and circulation pipelines, wherein the electrically controlled valves and circulation pumps are electrically connected to the controller.

[0011] The dampening solution tank body is provided with multiple fluid inlets and outlets, and each fluid inlet and outlet is connected to the circulation pump, electrically controlled valve and circulation pipeline of the three-pump independent circulation system to form three independent liquid circulation paths.

[0012] Furthermore, the dampening solution tank body and the three-pump independent circulation system form three independent liquid circulation paths. Specifically: one outlet and one inlet of the dampening solution tank body are connected to one set of hot-side fluid inlets and outlets of the heat exchanger through the circulation pipe, the electrically controlled valve, and the circulation pump to form a first independent circulation path; the other outlet and the other inlet are connected to the dampening solution circulation inlet and outlet of the printing press through the circulation pipe and the circulation pump to form a second independent circulation path; and the other set of hot-side fluid inlets and outlets of the heat exchanger are connected to the coolant circulation inlet and outlet of the printing press through the circulation pipe, the electrically controlled valve, and the circulation pump to form a third independent circulation path.

[0013] Furthermore, the circulation pumps used in the first independent circulation path and the third independent circulation path are specifically variable frequency circulation pumps.

[0014] Furthermore, the electrically controlled valve in the first independent circulation path is located at the liquid inlet on the inlet side of the circulation pump, and the electrically controlled valve in the third independent circulation path is located at the liquid inlet on the hot side fluid outlet side of the heat exchanger.

[0015] Furthermore, the heat exchanger is specifically a plate heat exchanger, and its fixed clamping plate is provided with a set of cold-side fluid inlets and outlets and a set of hot-side fluid inlets and outlets, and its movable clamping plate is provided with a set of hot-side fluid inlets and outlets.

[0016] Furthermore, the heat exchanger has two adjacent heat exchange baffles in the middle, each with only a cold-side fluid inlet, while the remaining heat exchange plates have both cold-side and hot-side fluid inlets.

[0017] Furthermore, the inlet and outlet of the cold-side fluid passage of the heat exchanger are connected to the inlet and outlet of the centralized water supply system of the industrial chiller via circulation pipes.

[0018] The beneficial effects of this utility model are:

[0019] This invention sets up three independently operating fluid paths through a heat exchanger to achieve synchronous and independent cooling circulation of the dual-path hot-side fluids. The design of the three-pump independent circulation system uses two independent variable frequency circulation pumps and one independent circulation pump to circulate the dampening solution and cooling water in three parallel pipeline systems, respectively for the transportation of dampening solution and cooling water. The plate heat exchanger used in the solution can effectively reduce energy consumption and cost increases caused by failure, thereby effectively improving the production efficiency and market competitiveness of book and periodical printing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the intelligent circulating cooling device for dampening solution according to this utility model.

[0021] Figure 2 This is a schematic diagram of the three-fluid pathway of the heat exchanger in the intelligent circulating cooling device for dampening solution of this utility model.

[0022] Figure 3 This is a schematic diagram of the heat exchange and cooling section of the heat exchanger in the intelligent circulating cooling device for dampening solution of this utility model.

[0023] In the picture:

[0024] 1. Dampening solution tank body; 11. Outlet 1; 12. Inlet 1; 13. Outlet 2; 14. Inlet 2; 15. Outlet 3;

[0025] 2. Heat exchanger, 211. Cold side inlet, 212. Cold side outlet, 221. Hot side inlet one, 222. Hot side outlet one, 231. Hot side inlet two, 232. Hot side outlet two, 24. Fixed clamping plate, 25. Movable clamping plate, 26. Heat exchange plates, 27. Heat exchange baffle, 28. Fluid inlet, 29. Independent flow path;

[0026] 3. Three-pump independent circulation system, 31. Controller, 32. Circulation pump, 33. Electrically controlled valve, 34. Circulation pipeline, 35. Liquid replenishment port. Detailed Implementation

[0027] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1-3 As shown, this utility model provides a technical solution: an intelligent circulating cooling device for dampening solution in printing presses, comprising a dampening solution tank body 1, a heat exchanger 2, and a three-pump independent circulation system 3, wherein:

[0033] The heat exchanger 2 is provided with three sets of independently operating fluid passages, including one set of cold-side fluid passages and two sets of hot-side fluid passages. Each set of fluid passages includes an inlet, an outlet and an independent flow path 29.

[0034] The three-pump independent circulation system 3 includes a controller 31, a circulation pump 32, an electrically controlled valve 33, and a circulation pipeline 34. The electrically controlled valve 33 and the circulation pump 32 are electrically connected to the controller 31.

[0035] The dampening liquid tank body 1 is provided with multiple fluid inlets and outlets, and each fluid inlet and outlet is connected to the circulation pump 32, the electrically controlled valve 33 and the circulation pipe 34 of the three-pump independent circulation system 3 to form three independent liquid circulation paths.

[0036] In the prior art, the dampening solution tank of an offset printing press consists of a tank body, which is usually made of corrosion-resistant materials (such as stainless steel or plastic) to ensure the stability and durability of the liquid. Its inlet is used to input the dampening solution from an external source into the tank and is equipped with a filter to prevent impurities from entering the tank. The outlet is connected to the printing press and is responsible for supplying the dampening solution to the printing unit. The design should ensure a stable flow rate.

[0037] The dampening solution tank is equipped with a level sensor to monitor the level of the dampening solution in real time, and has an alarm system to prevent the level from becoming too low or too high. In addition, a temperature sensor is used to monitor the temperature of the dampening solution to ensure that it is within the optimal operating range. To maintain the uniformity of the dampening solution, the tank is usually equipped with a stirring device to prevent the formation of sediment.

[0038] Its independent cooling device ensures the dampening solution circulates at a suitable temperature, while the drain outlet in the dampening solution tank is used to periodically clean residual dampening solution for easy maintenance and replacement. Simultaneously, the tank system is equipped with pipes and valves connecting the tank to the printing press to control flow and pressure. Finally, the automatic dampening solution mixing system uses pH and concentration sensors to ensure a continuous, stable, and precise supply of dampening solution in the tank to meet production needs. All these components work together to ensure a stable supply and maintenance of offset printing dampening solution, improving the efficiency and quality of the printing process. In this embodiment, the dampening solution tank body 1 is derived by removing the independent cooling device from the existing dampening solution tank and modifying the number and location of the inlet and outlet.

[0039] In this embodiment, the dampening solution tank body 1 and the three-pump independent circulation system 3 form three independent liquid circulation paths. Specifically: one outlet and one inlet of the dampening solution tank body 1, namely outlet 11 and inlet 12, are connected to one set of hot-side fluid inlets and outlets of the heat exchanger 2, namely hot-side inlet 221 and hot-side outlet 222, through the circulation pipe 34, the electrically controlled valve 33 and the circulation pump 32 to form a first independent circulation path; another outlet and another inlet of the dampening solution tank body 1, namely outlet 13 and inlet 14, are connected to the dampening solution circulation inlet and outlet of the printing press through the circulation pipe 34 and the circulation pump 32 to form a second independent circulation path; the other set of hot-side fluid inlets and outlets of the heat exchanger 2, namely hot-side inlet 231 and hot-side outlet 232, are connected to the coolant circulation inlet and outlet of the printing press through the circulation pipe 34, the electrically controlled valve 33 and the circulation pump 32 to form a third independent circulation path.

[0040] The circulation pump 32 used in the first and third independent circulation paths is specifically a variable frequency circulation pump. A variable frequency circulation pump is a type of circulation pump that controls flow and pressure through variable frequency speed regulation. Its main function is to automatically adjust the pump speed according to system requirements, matching the pump output with actual water demand, thereby achieving energy saving, reducing equipment wear, and improving system efficiency. In contrast, a regular circulation pump is a pump used for conveying and circulating liquids and typically does not have variable frequency functionality; therefore, its speed is constant and it does not automatically adjust output flow and pressure. The second independent circulation path uses a regular circulation pump.

[0041] The electrically controlled valve 33 in the first independent circulation path is located at the replenishment port 35 on the inlet side of the circulation pump 32. The replenishment port 35 in the first independent circulation path can be connected to the cold side inlet 211 of the heat exchanger 2 or to the outlet of the dampening solution centralized supply system. In this embodiment, the former connection method is selected. The electrically controlled valve 33 in the third independent circulation path is located at the replenishment port 35 on the hot side fluid outlet of the heat exchanger 2, that is, on the side of the hot side outlet 232. The replenishment port 35 in the third independent circulation path is connected to the cold side inlet 211 of the heat exchanger 2.

[0042] The heat exchanger 2 is specifically a plate heat exchanger, and its fixed clamping plate 24 is provided with a set of cold side fluid inlets and outlets, namely cold side inlet 211 and cold side outlet 212, and a set of hot side fluid inlets and outlets, namely hot side inlet 1 221 and hot side outlet 1 222. Its movable clamping plate 25 is provided with a set of hot side fluid inlets and outlets, namely hot side inlet 231 and hot side outlet 232.

[0043] The heat exchanger 2 has two adjacent heat exchange baffles 27 with only cold-side fluid inlets 28 in the middle, and the remaining heat exchange plates 26 have both cold-side fluid inlets 28 and hot-side fluid inlets 28.

[0044] The inlet and outlet of the cold-side fluid passage 29 of the heat exchanger 2, namely the cold-side inlet 211 and the cold-side outlet 212, are connected to the inlet and outlet of the centralized water supply system of the industrial chiller through the circulation pipe 34.

[0045] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fountain solution intelligent circulation refrigerating device for a printing machine, comprising a fountain solution water tank body, a heat exchanger and a three-pump independent circulation system, characterized in that: the heat exchanger is provided with three groups of independently operated fluid passages, including one group of cold-side fluid passages and two groups of hot-side fluid passages, each group of fluid passages comprising one inlet, one outlet and an independent flow path; the three-pump independent circulation system comprises a controller, a circulating pump, an electrically controlled valve and a circulating pipeline, and the electrically controlled valve and the circulating pump are in electrical communication with the controller; the fountain solution water tank body is provided with multiple fluid inlets and outlets, and each fluid inlet and outlet is in corresponding communication to form three independent liquid circulation passages through the circulating pump, the electrically controlled valve and the circulating pipeline of the three-pump independent circulation system. The three independent liquid circulation passages formed by the fountain solution water tank body and the three-pump independent circulation system, specifically, one outlet and one inlet of the fountain solution water tank body are in communication with one group of hot-side fluid inlets and outlets of the heat exchanger through the circulating pipeline, the electrically controlled valve and the circulating pump to form a first independent circulation passage; another outlet and another inlet are in communication with the fountain solution circulation inlets and outlets of the printing machine through the circulating pipeline and the circulating pump to form a second independent circulation passage; the other group of hot-side fluid inlets and outlets of the heat exchanger are in communication with the cooling liquid circulation inlets and outlets of the printing machine through the circulating pipeline, the electrically controlled valve and the circulating pump to form a third independent circulation passage. The circulating pump used in the first independent circulation passage and the third independent circulation passage is specifically a variable frequency circulating pump. The electrically controlled valve in the first independent circulation passage is arranged at the liquid supplement port on the liquid inlet side of the circulating pump, and the electrically controlled valve in the third independent circulation passage is arranged at the liquid supplement port on the hot-side fluid outlet side of the heat exchanger.

2. The device according to claim 1, characterized in that: The heat exchanger is specifically a plate heat exchanger, and one group of cold-side fluid inlets and outlets and one group of hot-side fluid inlets and outlets are arranged on the fixed clamping plate of the heat exchanger, and one group of hot-side fluid inlets and outlets is arranged on the movable clamping plate of the heat exchanger.

3. The device according to claim 2, characterized in that it comprises a control unit (7) for the automatic control of the circulation of the dampening liquid. Two adjacent heat exchange partitions with only cold-side fluid passages are arranged in the middle of the heat exchanger, and the remaining heat exchange plates have both cold-side fluid passages and hot-side fluid passages.

4. The device according to claim 2, characterized in that: The inlets and outlets of the cold-side fluid passages of the heat exchanger are in corresponding communication with the inlets and outlets of the centralized water supply system of the industrial refrigerating machine through the circulating pipeline.

5. The device according to claim 1, characterized in that: ​ 6. The intelligent circulating cooling device for dampening solution in printing presses according to claim 5, characterized in that: ​ 7. The intelligent circulating cooling device for dampening solution in printing presses according to claim 1, characterized in that: ​

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