CN214688428U - Offset press capable of one-way quantitative supply of wetting liquid - Google Patents
Offset press capable of one-way quantitative supply of wetting liquid Download PDFInfo
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- CN214688428U CN214688428U CN202120693213.2U CN202120693213U CN214688428U CN 214688428 U CN214688428 U CN 214688428U CN 202120693213 U CN202120693213 U CN 202120693213U CN 214688428 U CN214688428 U CN 214688428U
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Abstract
The utility model belongs to the technical field of lithographic printing, concretely relates to offset press of ability single pass ration supply dampening solution. The offset printing machine comprises the following parts: a wetting liquid storage tank (1), a wetting liquid supply pipeline (2), a wetting liquid tank (4), a liquid level controller (5) and a liquid supply pump (6); wherein the feed pump (6) is arranged in the wetting fluid tank (1); the wetting liquid supply pipeline (2) is communicated with the liquid supply pump (6) and the wetting liquid tank (4); the liquid level controller (5) is arranged in the wetting liquid tank (4) to control the liquid level in the wetting liquid tank (4); a wetting fluid return line is not arranged between the wetting fluid tank (4) and the wetting fluid storage tank (1). The utility model discloses an offset press compares traditional offset press and has following advantage: the wetting liquid in the wetting liquid storage tank is ensured to be clean, and the waste liquid discharge in offset printing production is greatly reduced; can quantitatively control the use of the wetting liquid, and save water and other resources.
Description
Technical Field
The utility model belongs to the technical field of lithographic printing, concretely relates to offset press of ability single pass ration supply dampening solution.
Background
Offset printing, also known as offset printing, is a method of repelling water and hydrophilic ink on a printing plate where pictures and texts are located by using the principles of immiscible oil and water and selective adsorption of the printing plate so as to realize coating of the ink on the printing plate; and a thin wetting liquid film is coated on the blank position of the printing plate, the thin water film has the function of ink repelling and hydrophilicity, and the position covered by the wetting liquid film can not be stained with ink.
In modern offset printing presses, the device that transfers ink to the printing plate is referred to as the inking system or inking system, and the device that transfers dampening solution to the printing plate is referred to as the dampening device or dampening system. The dampening device generally includes a dampener solution reservoir for refrigeration, a dampener solution tank for holding and providing each color grouping of dampener solution, a fountain roller for transferring dampener solution, a brush roller, a dampening bar, and a plate-engaging water roller for directly transferring dampener solution to the printing plate. The fountain roller and the dampening roller are generally metal smooth rollers, such as stainless steel rollers and chrome plating rollers, the plate-leaning water roller is generally a rubber roller, and the rollers are used for controlling a certain amount of water and continuously transmitting dampening liquid to a printing plate so as to realize normal printing production.
The fountain solution of the offset press generally contains alcohol, isopropanol or other chemical components of alcohol-free fountain solutions such as alcohol, ether, ester and surfactant, wherein some of the chemical components have volatility and are discharged into the atmosphere to improve the discharge amount of waste gas, and some compounds are discharged into water through waste water to cause water pollution. For example, the invention patent CN106585071B provides a zero-alcohol lithographic printing system, which overcomes the surface tension of water in a physical manner by changing the physical properties of the surface of a water roller, and replaces the traditional dampening manner of adding compounds such as alcohol, isopropanol or surfactant, and the like, and has the technical effects of avoiding chemical addition, greatly reducing the emission of VOCs at the source, reducing ink misting, improving the quality of printed products, and the like. However, in the production process of the offset printing machine, the dampening solution is continuously circulated from the dampening solution storage tank to the dampening solution tank, from the dampening solution tank to the water roller and the printing plate, and part of the dampening solution returns to the dampening solution tank, returns to the dampening solution storage tank from the dampening solution tank, and then returns from the dampening solution storage tank to the dampening solution tank, so that the ink and the paper ash paper wool are continuously brought back to the dampening solution storage tank, and the water in the dampening solution storage tank becomes increasingly turbid. The more organic compound added to the fountain solution, the more emulsification and mutual solubility with the ink and the more contamination brought back to the fountain solution reservoir.
In order to solve the above problems, the conventional offset printing machine needs to be shut down to clean the fountain solution tank and periodically discharge the waste solution after a certain period of use, or a filter device is installed in the offset printing machine to filter the fountain solution, but the filter device needs to be replaced periodically. Therefore, the existing method is inconvenient to operate and affects the production efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an offset press of ability single pass ration supply wetting fluid, it is moist according to the demand ration of offset printing production, avoids unnecessary wetting fluid to return to the wetting fluid storage tank to keep the clean of wetting fluid storage tank, the emission of greatly reduced offset printing production waste liquid.
The utility model provides an offset press of ability single pass ration supply dampening solution, offset press includes following spare part: a wetting liquid storage tank 1, a wetting liquid supply pipeline 2, a wetting liquid tank 4, a liquid level controller 5 and a liquid supply pump 6;
wherein the feed pump 6 is arranged inside the wetting fluid tank 1;
the wetting liquid supply pipeline 2 is communicated with the liquid supply pump 6 and the wetting liquid tank 4;
the liquid level controller 5 is arranged in the wetting liquid tank 4 to control the liquid level in the wetting liquid tank 4;
no wetting fluid return line is provided between the wetting fluid tank 4 and the wetting fluid storage tank 1.
The wetting fluid is contained in the wetting fluid storage tank 1.
Preferably, a control switch 3 is further arranged on the wetting fluid supply conduit 2;
the liquid level controller 5 is in communication connection with the liquid supply pump 6 and/or the control switch 3, and controls the liquid level in the wetting liquid tank 4 by controlling the opening and closing of the liquid supply pump 6 and/or the control switch 3.
Preferably, the control switch 3 is an electromagnetic valve, the liquid level controller 5 is two liquid level sensing relays arranged at different water levels of the wetting liquid tank 4, and the two liquid level sensing relays are in communication connection with the electromagnetic valve to control the opening and closing of the electromagnetic valve.
Preferably, the offset printing press further comprises: a wetting liquid tank roller A, a metering roller B, a water distributing roller C, a plate leaning water roller D and a printing plate cylinder E;
the dampening solution tank roller A is partially arranged in the dampening solution tank 4, the dampening solution tank roller A is in rotary contact with the metering roller B, the metering roller B is in rotary contact with the water distributing roller C, the water distributing roller C is in rotary contact with the plate leaning water roller D, and the plate leaning water roller D is in rotary contact with the printing plate cylinder E.
Preferably, the offset printing press further comprises: the liquid level monitoring device comprises a plurality of liquid level probes and an alarm device which are arranged in the wetting liquid tank 4, wherein the liquid level probes are in communication connection with the alarm device.
Preferably, the offset printing press further comprises: and the intelligent operation screen is in communication connection with the liquid level controller 5 and the liquid supply pump 6.
The wetting fluid of said wetting fluid tank 1 is preferably tap water. The offset printing machine adopts the offset printing machine of patent CN 106585071B.
The conventional offset printing equipment dampening system adopts the mode of excessive water supply and circulating water supply, and the aim of the traditional offset printing equipment dampening system is mainly to refrigerate through a dampening solution storage tank and continuously cool the dampening solution so as to reduce the emulsification of ink and the dampening solution or the interaction of the ink and the dampening solution. However, with the progress of offset printing technology, the interaction between ink and water can be strictly controlled, and particularly, the utility model CN106585071B directly adopts tap water for dampening, and chemical substances such as alcohol, isopropyl alcohol, surfactant and the like are not added, so that the interaction between ink and emulsified ink is minimized, and therefore, the control of the water temperature of the dampening solution is unnecessary, and excessive water supply and circulating water supply are continued, which not only causes resource waste, but also aggravates the pollution of the dampening solution by ink, increases the discharge amount of waste liquid, and improves the pollution control cost.
The offset press of the utility model adopts the offset press of patent CN106585071B, realizes quantitative water supply and one-way water supply, and meets the requirement of green printing.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses an offset press adopts wetting fluid ration supply system for the first time, can the quantitative control wetting fluid supply volume through setting up liquid level controller, wetting fluid groove 4 with do not set up wetting fluid return line between wetting fluid storage tank 1, this can guarantee not have unnecessary wetting fluid to return wetting fluid storage tank, block the wetting fluid circulation. The offset printing machine with the quantitative wetting liquid supply system only needs to quantitatively supply the wetting liquid from the wetting liquid storage tank to the wetting liquid tanks of all color groups, and no more residual wetting liquid returns to the wetting liquid storage tank from all the wetting liquid tanks, so that the offset printing machine has the following advantages compared with the traditional offset printing machine: 1. the wetting liquid in the wetting liquid storage tank is ensured to be clean, and the waste liquid discharge in offset printing production is greatly reduced; 2. the dampening solution storage tank does not need to be repeatedly shut down and cleaned in the printing process; 2. the filtration and purification of the contaminants in the wetting fluid storage tank are not required to be provided; 3. can quantitatively control the use of the wetting liquid, and save water and other resources.
2. The offset press can be provided with a modern control system with an intelligent operation screen, a plurality of liquid level probes and alarm devices can be added, and a warning signal can be sent out under the condition that a water level sensing relay is out of order, so that the quantitative wetting device can be accurately and intelligently controlled.
Drawings
FIG. 1 is a schematic view of a conventional offset printing apparatus dampening system.
Fig. 2 is a schematic view of a quantitative dampening system of the offset printing press of the present invention.
Fig. 3 is a flow chart of the quantitative wetting system of the present invention.
List of reference numerals:
1. a fountain solution storage tank, 2, a fountain solution supply pipe, 3, a control switch, 4, a fountain solution tank, 5, a level controller, 6, a liquid supply pump, A, a fountain solution tank roller, B, a metering roller, C, a dampening water stringing roller, D, a plate leaning water roller, E, a printing plate cylinder, 10, a fountain solution storage tank of a conventional offset press, 20, a fountain solution supply pipe of a conventional offset press, 30, a fountain solution tank of a conventional offset press, 40, a fountain solution return pipe valve of a conventional offset press, 50, a fountain solution return pipe of a conventional offset press, 60, a filtration circulation pipe of a conventional offset press, 70, a fountain solution filter tank of a conventional offset press, 80, a liquid supply pump of a conventional offset press.
Detailed Description
The present invention will be described with reference to specific examples, but the embodiments of the present invention are not limited thereto.
The present embodiment is provided only as a reference to a conventional offset printing apparatus dampening system, as shown in FIG. 1, wherein dampening solution is fed from a conventional offset printing press dampening solution supply conduit 20 to a conventional offset printing press dampening solution tank 30 by a conventional offset printing press fluid feed pump 80. Excess dampening solution in the dampening solution tank is returned to the conventional offset press dampening solution storage tank 10 through the conventional offset press dampening solution return conduit 50, thereby continuously returning ink, paper ash, paper fluff to the conventional offset press dampening solution storage tank 10. The conventional offset press fountain solution storage tank 10 is in communication with the conventional offset press fountain solution filter tank 70 through a conventional offset press filtration circulation line 60, and after the conventional offset press fountain solution filter tank 70 filters the fountain solution with ink and paper dust, the clean fountain solution is circulated back to the conventional offset press fountain solution storage tank 10 for reuse.
Example 1
The core of this embodiment is that the wetting fluid tank of every color class of ration for offset press supplies wetting fluid, installs an solenoid valve at wetting fluid tank water inlet to set up liquid level perception relay respectively at two different water levels in wetting fluid tank, its effect is:
when the liquid level of the wetting liquid tank reaches a high point, the liquid level sensing relay sends out a signal that the wetting liquid is excessive, the electromagnetic valve receives the signal, and the water inlet is closed; when the liquid level of the wetting liquid tank is lower than the set lowest liquid level point, the liquid level sensing relay sends out a signal that the wetting liquid is insufficient, the solenoid valve receives the signal, the water inlet is opened, and water is supplied to the wetting liquid tank of the color group; under the condition of quantitative wetting, the wetting liquid in the wetting liquid tank of the offset printing machine is always kept in a proper amount, and the wetting liquid cannot return to the wetting liquid storage tank, so that the circulation of the wetting liquid is blocked. The quantitative wetting system works schematically as shown in fig. 3.
On the basis, the embodiment also provides an offset printing machine with the quantitative wetting system, and each color group of the offset printing machine is provided with the quantitative wetting system, so that the whole set of offset printing equipment adopts quantitative wetting, no residual wetting liquid returns to the wetting liquid storage tank, the water in the wetting liquid storage tank is kept clean, and the waste liquid discharge in the offset printing production process is greatly reduced.
The structure and operation of a single color set of an offset printing press having a metered dampening system is schematically illustrated in figure 2. The offset printing machine comprises the following parts: a wetting liquid storage tank 1, a wetting liquid supply pipeline 2, a wetting liquid tank 4, a liquid level controller 5 and a liquid supply pump 6;
wherein the feed pump 6 is arranged inside the wetting fluid tank 1;
the wetting liquid supply pipeline 2 is communicated with the liquid supply pump 6 and the wetting liquid tank 4;
the liquid level controller 5 is arranged in the wetting liquid tank 4 to control the liquid level in the wetting liquid tank 4;
no wetting fluid return line is provided between the wetting fluid tank 4 and the wetting fluid storage tank 1.
The wetting fluid is contained in the wetting fluid storage tank 1.
The wetting fluid supply pipe 2 is also provided with a control switch 3;
the liquid level controller 5 is in communication connection with the control switch 3, and controls the liquid level in the wetting liquid tank 4 by controlling the on and off of the control switch 3.
The control switch 3 is an electromagnetic valve, the liquid level controller 5 is two liquid level sensing relays arranged at two different water levels of the wetting liquid tank 4, and the two liquid level sensing relays are in communication connection with the electromagnetic valve to control the opening and closing of the electromagnetic valve.
The offset printing press further comprises: a wetting liquid tank roller A, a metering roller B, a water distributing roller C, a plate leaning water roller D and a printing plate cylinder E; the dampening solution tank roller A is partially arranged in the dampening solution tank 4, the dampening solution tank roller A is in rotary contact with the metering roller B, the metering roller B is in rotary contact with the water distributing roller C, the water distributing roller C is in rotary contact with the plate leaning water roller D, and the plate leaning water roller D is in rotary contact with the printing plate cylinder E.
The offset press can be provided with a modern control system with an intelligent operation screen, a plurality of liquid level probes and alarm devices can be added, and a warning signal can be sent out under the condition that a water level sensing relay is out of order, so that the quantitative wetting device can be accurately and intelligently controlled.
Example 2
A northern 45A newspaper rotary press of a Yunnan daily newspaper printing center is provided with 4 towers and 32 color groups, and each color group is provided with a quantitative wetting device, wherein the quantitative wetting device comprises one refrigerating wetting liquid storage tank, one electric control cabinet, two liquid level sensing relays of each color group, an electromagnetic valve and the like. Sampling the water in the wetting liquid storage tank before installing the quantitative wetting device, sampling the water in the wetting liquid storage tank again after installing the quantitative wetting device and continuously producing and operating for 15 days, and inspecting the water samples in the wetting liquid storage tank twice, wherein the water quality is remarkably improved and the waste liquid discharge is remarkably reduced after installing the quantitative wetting device. The specific detection data are as follows:
example 3
Certain homemade offset printing equipment of sheet-fed offset press contains six color lots, has installed the ration wetting device of embodiment 1 in advance when the equipment leaves the factory, and wherein includes components such as one refrigeration wetting fluid storage tank, one electric control cabinet, one intelligent operation panel, two liquid level perception relays, an electromagnetic valve of every color lot. After the equipment is installed and the continuous production operation is carried out for 30 days, the water in the wetting fluid storage tank is sampled and inspected, and various environmental protection monitoring indexes of the water in the wetting fluid storage tank are very superior. The specific detection data are as follows:
Claims (6)
1. an offset printing press capable of single pass dosing of dampening fluid, said offset printing press comprising the following components: a wetting liquid storage tank (1), a wetting liquid supply pipeline (2), a wetting liquid tank (4), a liquid level controller (5) and a liquid supply pump (6);
wherein the feed pump (6) is arranged in the wetting fluid tank (1);
the wetting liquid supply pipeline (2) is communicated with the liquid supply pump (6) and the wetting liquid tank (4);
the liquid level controller (5) is arranged in the wetting liquid tank (4) to control the liquid level in the wetting liquid tank (4);
a wetting fluid return line is not arranged between the wetting fluid tank (4) and the wetting fluid storage tank (1).
2. An offset printing machine with single pass dosing of dampening fluid according to claim 1, characterized in that the dampening fluid supply conduit (2) is further provided with a control switch (3);
the liquid level controller (5) is in communication connection with the liquid supply pump (6) and/or the control switch (3), and the liquid level in the wetting liquid tank (4) is controlled by controlling the opening and closing of the liquid supply pump (6) and/or the control switch (3).
3. The offset printing press capable of single pass dosing of dampening solution according to claim 2, wherein the control switch (3) is a solenoid valve, and the level controller (5) is a level sensing relay disposed at two different levels in the dampening solution tank (4), the two level sensing relays being in communication with the solenoid valve to control the opening and closing of the solenoid valve.
4. An offset printing press with single pass dosing of dampening fluid according to any of claims 1 to 3, further comprising in the offset printing press: a wetting liquid tank roller (A), a metering roller (B), a water distributing roller (C), a plate leaning water roller (D) and a printing plate cylinder (E);
the dampening solution tank roller (A) is partially arranged in the dampening solution tank (4), the dampening solution tank roller (A) is in rotary contact with the metering roller (B), the metering roller (B) is in rotary contact with the dampening water mixing roller (C), the dampening water mixing roller (C) is in rotary contact with the plate leaning water roller (D), and the plate leaning water roller (D) is in rotary contact with the printing plate cylinder (E).
5. An offset printing press with single pass dosing of dampening fluid according to any of claims 1 to 3, further comprising in the offset printing press: the liquid level monitoring device comprises a plurality of liquid level probes and an alarm device, wherein the liquid level probes and the alarm device are arranged in the wetting liquid tank (4) and are in communication connection.
6. An offset printing press with single pass dosing of dampening fluid according to any of claims 1 to 3, further comprising in the offset printing press: and the intelligent operation screen is in communication connection with the liquid level controller (5) and the liquid supply pump (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120693213.2U CN214688428U (en) | 2021-04-06 | 2021-04-06 | Offset press capable of one-way quantitative supply of wetting liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120693213.2U CN214688428U (en) | 2021-04-06 | 2021-04-06 | Offset press capable of one-way quantitative supply of wetting liquid |
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| Publication Number | Publication Date |
|---|---|
| CN214688428U true CN214688428U (en) | 2021-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120693213.2U Active CN214688428U (en) | 2021-04-06 | 2021-04-06 | Offset press capable of one-way quantitative supply of wetting liquid |
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| Country | Link |
|---|---|
| CN (1) | CN214688428U (en) |
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2021
- 2021-04-06 CN CN202120693213.2U patent/CN214688428U/en active Active
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