Water tray water returning mechanism for water feeding of plate cylinder

Abstract

The utility model relates to a water plate water return mechanism for water feeding of a plate cylinder, which comprises a water plate main body, a water inlet tank, a water feeding tank, a water inlet pipe, a water return pipe and a section of thin pipe, the front end inside the water plate main body is divided into the water inlet tank and the water feeding tank by an L-shaped partition plate, and the water inlet pipe is mounted at the lower end of one end of the water inlet tank; a water return pipe is mounted at the other end, close to the front end of the water pan body, of the upper water tank, a thin pipe is mounted on the inner side of an opening of the water return pipe, and the upper end of the thin pipe is higher than the end of the opening of the water return pipe. The water supply device has the advantages that the water inlet tank and the water feeding tank are separated through the L-shaped partition plate, water in the water supply pipe is firstly supplied into the water inlet tank and then is conveyed into the water feeding tank through the water inlet or slowly overflows into the water feeding tank from the position above the L-shaped partition plate, it is ensured that water flow in the water feeding tank is stable, and the problem that water splashes when the water outlet roller carries water is solved; meanwhile, the thin pipe is installed on the inner side of the opening of the water return pipe to assist ventilation, the problem that water return blocking at the opening of the water return pipe is airtight is effectively solved, and stable, safe and reliable water return is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of printing press equipment, specifically to a water return mechanism for water supply to printing plate cylinders. Background Technology

[0002] Currently, in printing presses, the printing cylinder needs to transfer wetting solution from a water tank via a water jet roller. The water jet roller rotates above the water tank, with its lower end in contact with the wetting solution. This requires a continuous supply of wetting solution to the water tank to ensure the water level fluctuates within a set range. Therefore, the supply and return water speeds need to be roughly the same. The supply method is generally pumping, with gravity return. Currently, there are two problems: turbulent water flow during supply and poor return water flow. Firstly, the pumped supply has a certain water pressure, supplying water from one end and returning it from the other. Turbulence caused by the water supply can easily lead to splashing and overflow of unstable water by the water roller, causing printing defects. Secondly, the current return water pipe uses gravity to return water. When the wetting solution overflows into the inlet of the return water pipe, if the overflow is large, the inlet will suddenly fill with water. Since the return water pipe relies on gravity to return water, air needs to be vented from the inlet. When the inlet is full of water, it will trap air, resulting in poor venting, slow water return or water return stopping. This causes excessive water accumulation in the water pan, resulting in water overflowing from the water pan and causing printing defects. This requires constant manual handling, which is time-consuming and labor-intensive. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model proposes a water return mechanism for water supply to printing plate cylinders. It is ingeniously designed, has a reasonable and compact structure, and provides stable water return, safety and reliability.

[0004] The technical solution of this utility model:

[0005] A water tray return mechanism for water supply to a printing plate cylinder includes a water tray body, an inlet trough, an upper water trough, an inlet pipe, a return pipe, and a thin pipe. The water tray body is designed as a cuboid water trough, with arc-shaped notches on both sides. The front end of the interior of the water tray body is divided into an inlet trough and an upper water trough by an L-shaped partition. An inlet pipe is installed at the lower end of one end of the inlet trough, and an inlet is opened at the lower end of the other end of the inlet trough. The other end of the inlet trough is connected to one end of the upper water trough through the inlet. A return pipe is installed at the other end of the upper water trough near the front end of the water tray body. A thin pipe is installed inside the opening of the return pipe, and the upper end of the thin pipe is higher than the opening end of the return pipe.

[0006] The water inlet tank is also designed to be equipped with a horizontal water pipe. One end of the horizontal water pipe is connected to the outlet of the water inlet pipe, and the outlet end of the horizontal water pipe is located near the water inlet.

[0007] The outlet end of the horizontal water pipe is designed as a vertically angled outlet, with the outlet facing the front end of the water pan body.

[0008] The height of the L-shaped partition is lower than the height of the water tank of the main body of the water pan, the height of the inlet of the return water pipe is higher than the bottom of the water tank of the main body of the water pan by a certain distance, and the height of the inlet of the return water pipe is lower than the height of the L-shaped partition.

[0009] The opening of the return water pipe is a certain distance above the bottom of the water tank of the main body of the water pan, and a rotating sleeve is installed on the outside of the opening of the return water pipe. The height of the rotating sleeve is the same as the height of the opening of the return water pipe. There is an inner drain port on each side of the opening of the return water pipe, and there is also an outer drain port on each side of the rotating sleeve. There is also a threaded hole on one side of the rotating sleeve, and a positioning screw is screwed into the threaded hole. The outer drain port of the rotating sleeve and the inner drain port of the return water pipe can be connected, or after the rotating sleeve is rotated 90 degrees, the outer drain port of the rotating sleeve and the inner drain port of the return water pipe are not connected, forming a closed state.

[0010] The rotating sleeve is also designed with an arc-shaped protrusion, and an arc-shaped groove is provided on the outer side of the opening of the return water pipe, with the end of the positioning screw resting in the arc-shaped groove.

[0011] The shape of the thin tube is similar to the inner wall shape of the return water pipe, and the thin tube is installed against the inner wall of the return water pipe.

[0012] The bottom rear end of the rectangular water tank is designed as an upward-curving arc-shaped bottom plate, and the rear end plate of the water tank is also designed with an upward-extending extension plate.

[0013] The advantages of this utility model are its ingenious design and reasonable, compact structure. An L-shaped partition separates an inlet tank and an upper tank. Water is first supplied to the inlet tank through the supply pipe and then transported to the upper tank through the inlet, or slowly overflows into the upper tank from above the L-shaped partition, ensuring a stable water flow in the upper tank and preventing splashing when water is carried by the outlet roller. At the same time, a thin tube is installed on the inside of the return water pipe opening to assist in ventilation, effectively preventing the return water from being blocked and not breathable, ensuring stable and reliable return water. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention. Figure 1 .

[0015] Figure 2 This is a schematic diagram of the present invention. Figure 2 .

[0016] Figure 3 yes Figure 2 A magnified view of a portion of the image.

[0017] Figure 4 yes Figure 3 Schematic diagram of a partial cross-section. Detailed Implementation

[0018] See attached document Figure 1-4 A water tray return mechanism for watering printing plate cylinders includes a water tray body 1, an inlet trough 2, an upper water trough 3, an inlet pipe 4, a return pipe 5, and a thin pipe 6. The water tray body 1 is designed as a cuboid water trough, with arc-shaped notches on both sides. The front end of the interior of the water tray body 1 is divided into the inlet trough 2 and the upper water trough 3 by an L-shaped partition 7. An inlet pipe 4 is installed at the lower end of one end of the inlet trough 2, and an inlet 21 is opened at the lower end of the other end of the inlet trough 2. The other end of the inlet trough 2 is connected to one end of the upper water trough 3 through the inlet 21. A return pipe 5 is installed at the other end of the upper water trough 3 near the front end of the water tray body 1. A thin pipe 6 is installed inside the opening of the return pipe 5, and the upper end of the thin pipe 6 is higher than the opening end of the return pipe 5.

[0019] A horizontal water pipe 8 is also designed and installed inside the water inlet tank 2. One end of the horizontal water pipe 8 is connected to the outlet of the water inlet pipe 4, and the outlet end of the horizontal water pipe 8 is located near the water inlet 21. The outlet end of the horizontal water pipe 8 is designed as a vertically angled outlet 81, with the outlet 81 facing the front end of the water tray body 1. The horizontal water pipe is laid out inside the water inlet tank, saving external space. At the same time, the angled design of the outlet end of the horizontal water pipe ensures that the water will first impact the front plate and one side plate of the water tank before flowing back, thus buffering the water supply speed and allowing the water flow to enter the upper water tank stably through the water inlet.

[0020] The height of the L-shaped partition 7 is lower than the height of the water tank of the water pan body 1, the height of the inlet of the return water pipe 5 is higher than the bottom of the water tank of the water pan body 1 by a certain distance, and the height of the inlet of the return water pipe 5 is lower than the height of the L-shaped partition 7.

[0021] The opening of the return water pipe 5 is a certain distance above the bottom of the water tank of the water pan body 1, and a rotating sleeve 9 is installed on the outside of the opening of the return water pipe 5. The height of the rotating sleeve 9 is the same as the height of the opening of the return water pipe 5. An inner drain port 51 is opened on each side of the opening of the return water pipe 5, and an outer drain port 91 is also opened on each side of the rotating sleeve 9. A threaded hole is also opened on one side of the rotating sleeve 9, and a positioning screw 92 is screwed into the threaded hole. The outer drain port 91 of the rotating sleeve 9 can be connected to the inner drain port 51 of the return water pipe 5, or after the rotating sleeve 9 is rotated 90 degrees, the outer drain port 91 of the rotating sleeve 9 and the inner drain port 51 of the return water pipe 5 are not connected, forming a closed state. The inner drain port is a U-shaped groove with the opening facing upwards, and the bottom of the inner drain port is flush with the bottom of the water tank to ensure that the water can be drained completely; the outer drain port is a U-shaped groove with the opening facing downwards.

[0022] The rotating sleeve 9 is also designed with an arc-shaped protrusion 93, and an arc-shaped groove 52 is provided on the outer side of the opening of the return water pipe 5. The end of the positioning screw 92 rests in the arc-shaped groove 52. The arc-shaped protrusion makes it convenient for the operator to hold the rotating sleeve and rotate it, avoiding contact with the aqueous solution, since the wetting aqueous solution is somewhat corrosive.

[0023] The shape of the thin tube 6 is modeled after the inner wall of the return water pipe 5, and the thin tube 6 is installed close to the inner wall of the return water pipe 5. The modeling design fits the pipe structure better and facilitates installation. The thin tube can be a metal pipe and is approximately 10-30 cm long.

[0024] The bottom rear end of the rectangular water tank is designed as an upward-curving arc-shaped base plate, and the rear end plate of the water tank is also designed with an upward-extending extension plate. The extension plate is designed to block water and prevent water from splashing out.

[0025] In use, the rotating sleeve at the return water pipe inlet rotates to close the external and internal drain ports, and the rotating sleeve is locked to the outside of the return water pipe inlet by a positioning screw. Then, water is added. The inlet pipe delivers the aqueous solution through a horizontal water pipe to the inlet tank near the inlet, with the outlet of the horizontal water pipe facing the opposite direction to the inlet (the front side of the water pan body). The water flow first impacts the front plate of the water pan body and then flows slowly around it. Initially, the inlet and upper water tanks are filled to the height of the return water pipe inlet. When the water level is lower than the L-shaped partition... When the water level is above the L-shaped baffle, the water flows into one end of the upper water tank from the inlet and then overflows into the return pipe from the other end, forming a backflow. A section of the thin pipe is higher than the overflow water level, so that the water fills the return pipe opening during overflow, and the thin pipe can also release air in time, allowing the water to flow back smoothly under the action of gravity. When the water level is higher than the L-shaped baffle, the water flows into the upper water tank from above the L-shaped baffle and the inlet at the same time, and overflows smoothly from above the L-shaped baffle. This way, the water flow will not be too large, causing splashing when the water drum roller carries water, which is safe and reliable. The return flow is the same as above.

Claims

1. A water return mechanism for water supply to a printing plate cylinder, characterized in that, It includes a water pan body, an inlet trough, an upper water trough, an inlet pipe, a return pipe, and a thin pipe. The water pan body is designed as a cuboid water trough. There are arc-shaped notches on both sides of the water pan body. The front end of the water pan body is divided into an inlet trough and an upper water trough by an L-shaped partition. An inlet pipe is installed at the lower end of one end of the inlet trough. An inlet is opened at the lower end of the other end of the inlet trough. The other end of the inlet trough is connected to one end of the upper water trough through the inlet. A return pipe is installed at the other end of the upper water trough near the front end of the water pan body. A thin pipe is installed inside the opening of the return pipe, and the upper end of the thin pipe is higher than the opening end of the return pipe.

2. The water return mechanism for water supply to a printing plate cylinder according to claim 1, characterized in that, The water inlet tank is also designed to be equipped with a horizontal water pipe. One end of the horizontal water pipe is connected to the outlet of the water inlet pipe, and the outlet end of the horizontal water pipe is located near the water inlet.

3. The water return mechanism for a printing plate cylinder according to claim 2, characterized in that, The outlet end of the horizontal water pipe is designed as a vertically angled outlet, with the outlet facing the front end of the water pan body.

4. The water return mechanism for water supply to a printing plate cylinder according to claim 1, characterized in that, The height of the L-shaped partition is lower than the height of the water tank of the main body of the water pan, the height of the inlet of the return water pipe is higher than the bottom of the water tank of the main body of the water pan by a certain distance, and the height of the inlet of the return water pipe is lower than the height of the L-shaped partition.

5. The water return mechanism for water supply to a printing plate cylinder according to claim 1, characterized in that, The opening of the return water pipe is a certain distance above the bottom of the water tank of the main body of the water pan, and a rotating sleeve is installed on the outside of the opening of the return water pipe. The height of the rotating sleeve is the same as the height of the opening of the return water pipe. There is an inner drain port on each side of the opening of the return water pipe, and there is also an outer drain port on each side of the rotating sleeve. There is also a threaded hole on one side of the rotating sleeve, and a positioning screw is screwed into the threaded hole. The outer drain port of the rotating sleeve and the inner drain port of the return water pipe can be connected, or after the rotating sleeve is rotated 90 degrees, the outer drain port of the rotating sleeve and the inner drain port of the return water pipe are not connected, forming a closed state.

6. The water return mechanism for a printing plate cylinder according to claim 5, characterized in that, The rotating sleeve is also designed with an arc-shaped protrusion, and an arc-shaped groove is provided on the outer side of the opening of the return water pipe, with the end of the positioning screw resting in the arc-shaped groove.

7. The water return mechanism for water supply to a printing plate cylinder according to claim 1, characterized in that, The shape of the thin tube is similar to the inner wall shape of the return water pipe, and the thin tube is installed against the inner wall of the return water pipe.

8. The water return mechanism for water supply to a printing plate cylinder according to claim 1, characterized in that, The bottom rear end of the rectangular water tank is designed as an upward-curving arc-shaped bottom plate, and the rear end plate of the water tank is also designed with an upward-extending extension plate.

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