Heating system of multi-color-unit printing machine

Abstract

A multi-color-cell printing machine heating system comprises a plurality of printing color cells and drying devices in one-to-one correspondence with the printing color cells, each drying device comprises a drying oven arranged on the corresponding printing color cell and a heating box providing a heat source for the drying oven, an air outlet and an air return opening are formed in each heating box, and the air outlets are connected with the air inlet ends of the drying ovens through air supply pipes. The air return port is connected with the air return end of the drying oven through an air return pipe, an exhaust pipe is further arranged, a connecting air pipe is arranged between the adjacent heating boxes, the heating boxes are connected in parallel through the exhaust pipe and connected in series through the connecting air pipe, and air doors capable of switching the air return port to be communicated with the exhaust pipe or the air return port to be communicated with the connecting air pipe are arranged on the heating boxes. Different air return application combinations can be achieved by adjusting the state of the air door according to the printing characteristics of products, and energy consumption is reduced to the minimum degree to the maximum degree.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, and in particular to a heating system for a multi-color printing press. Background Technology

[0002] Existing printing equipment typically has an independent drying system for each printing unit. The intake fan blows hot air into the oven through ducts, while the exhaust fan discharges the exhaust gas from the oven into the exhaust duct. The discharged exhaust gas contains a large amount of heat energy, thus wasting a lot of energy. Although some equipment is equipped with heat recovery devices, the current heat recovery utilization rate is generally less than 50%. In addition, some equipment achieves energy saving by connecting the system in series. For example, the exhaust air of the drying system of the first color is directly connected to the air inlet of the second unit, and the exhaust air of the drying system of the second color is directly connected to the air inlet of the third unit, forming a series return air structure. However, this structure is fixed and cannot be adjusted according to the characteristics of the printed products. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a heating system for a multi-color printing press, which can achieve different combinations of return air applications by adjusting the state of the air damper according to the printing characteristics of the product, thereby minimizing energy consumption.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a heating system for a multi-color printing press, comprising several printing color groups and drying equipment corresponding to each printing color group. The drying equipment includes an oven mounted on the printing color group and a heating chamber that provides a heat source to the oven. The heating chamber is provided with an air outlet and an air return outlet. The air outlet is connected to the air inlet of the oven through an air supply pipe, and the air return outlet is connected to the air return end of the oven through a air return pipe. An exhaust pipe is also provided. A connecting duct is provided between adjacent heating chambers. The heating chambers are connected in parallel through the exhaust pipes, and the heating chambers are connected in series through the connecting ducts. The heating chamber is provided with a damper that can switch the connection between the air return outlet and the exhaust pipe or between the air return outlet and the connecting duct.

[0005] The beneficial effects of this utility model compared with the prior art are:

[0006] All heating chambers are connected in parallel via exhaust ducts, and all heating chambers are connected in series via connecting ducts. The damper can switch the return air inlet to connect with the exhaust duct or the return air inlet to connect with the connecting duct. Different return air application combinations can be achieved by adjusting the state of the damper according to the printing characteristics of the product, so as to minimize energy consumption. Attached Figure Description

[0007] Figure 1 This is a perspective view of the present utility model.

[0008] Figure 2This is a side view of the present invention. Detailed Implementation

[0009] The present invention will be further described below with reference to the accompanying drawings.

[0010] like Figure 1 , 2 As shown, a heating system for a multi-color printing press includes several printing color groups 1 and drying equipment corresponding to each printing color group 1. The drying equipment includes an oven 2 mounted on each printing color group 1 and a heating chamber 3 providing a heat source to the oven 2. The heating chamber 3 has an air outlet and an air return outlet. The air outlet is connected to the air inlet of the oven 2 via an air supply pipe 8, and the air return outlet is connected to the air return end of the oven 2 via a air return pipe 7. An exhaust pipe 4 is also provided, and connecting air pipes 5 are provided between adjacent heating chambers 3. The heating chambers 3 are connected in parallel via the exhaust pipes 4 and in series via the connecting air pipes 6. Each heating chamber 3 has a damper 6 that can switch the connection between the air return outlet and the exhaust pipe or between the air return outlet and the connecting air pipe.

[0011] Taking a product with seven-color printing as an example, when the printing is surface printing, the first color is a full-page solid print. The exhaust gas from the oven contains a relatively high solvent content. The first color can be treated as an independent unit by adjusting the damper, and the exhaust air is directly discharged into the exhaust duct. The exhaust air of the second, third, and fourth printing color groups is connected in series, and the exhaust air of the fifth, sixth, and seventh printing color groups is connected in series.

[0012] When printing, the seventh color is a solid print, and the exhaust gas from the oven contains a relatively high amount of solvent. The seventh color can be treated as an independent unit by adjusting the damper, and the exhaust air can be directly discharged into the exhaust duct. The exhaust air of the first, second and third printing color groups is connected in series, and the exhaust air of the fourth, fifth and sixth printing color groups is connected in series.

[0013] Depending on the actual production needs, when the printed pattern is simple and the solvent content in the exhaust gas discharged by the exhaust fan is very small, we can also connect the first four colors in series and the last three colors in series to form two direct discharges into the exhaust pipe.

Claims

1. A heating system for a multi-color printing press, comprising a plurality of printing color groups and drying equipment corresponding to each printing color group, wherein the drying equipment includes an oven mounted on the printing color groups and a heating chamber providing a heat source to the oven, the heating chamber being provided with an air outlet and an air return outlet, the air outlet being connected to the air inlet of the oven via an air supply pipe, and the air return outlet being connected to the air return end of the oven via a air return pipe, characterized in that: It is also equipped with an exhaust duct, and a connecting duct is provided between adjacent heating boxes. The heating boxes are connected in parallel through a three-way exhaust duct, and the heating boxes are connected in series through the connecting duct. The heating box is equipped with a damper that can switch the return air outlet to be connected to the exhaust duct or the return air outlet to be connected to the connecting duct.

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