Cooling device of ink vibrator of printing machine

Abstract

The utility model discloses a cooling device for an ink vibrator of a printing machine, which is characterized in that a first water inlet pipe is arranged in an iron core, and one-way valve groove structures are arranged on two sides of a runner cavity in the iron core, so that a liquid inlet channel is formed under the action of the first water inlet pipe, and a backflow channel of cooling liquid is formed under the action of the one-way valve groove structures, the one-way valve groove can ensure that cooling water only flows in a one-way mode in a cooling loop, so that the backflow phenomenon of the cooling water caused by unstable pressure in the loop can be effectively avoided, meanwhile, the cooling water flowing in the one-way mode can absorb and transfer heat more effectively, the cooling efficiency is improved, and the service life of the cooling water is prolonged. Therefore, the ink vibrator of the printing machine is prevented from being overheated during high-speed operation; according to the cooling system, the blocking assembly is arranged on one side of the inner cavity of the flow channel cavity, so that under the action of the blocking assembly, the backflow phenomenon of the first water inlet pipe can be effectively prevented, the effect that the whole cooling system can only conduct one-way flow is guaranteed, and the use safety of the cooling system is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of printing machines, in particular to a cooling device for an ink roller of a printing machine. Background Art

[0002] During the printing process, the ink roller of a printing press rotates circumferentially while moving axially, generating friction with other ink rollers, causing the roller surface temperature to rise. The faster the printing speed, the more severe the roller temperature rise. If the roller surface temperature is too high, the ink temperature will inevitably rise accordingly, increasing the ink fluidity, decreasing the viscosity, and weakening the water resistance. This will cause the ink to over-emulsify, seriously affecting the quality of the printed product. Therefore, the roller temperature must be controlled. Cooling water should be passed through the hollow roller to cool it.

[0003] Some existing cooling devices, for example: Application No.: CN201520611486.2, Application Date: 2015-08-13, proposes a cooling device for the ink roller of a printing press, comprising a left end shaft, an ink roller, an upper water pipe, a right end shaft, a shaft sleeve, an operating surface wall panel, a rotary joint, a water inlet and a water outlet, one end of the ink roller is connected to the left end shaft, and the other end is connected to the right end shaft, the other end of the right end shaft is connected to the rotary joint, one side of the rotary joint is respectively installed with a water inlet and a water outlet, the shaft sleeve is installed on the periphery of the right end shaft, fixing the right end shaft to the operating surface wall panel, one end of the upper water pipe is suspended in the cavity of the ink roller, and the other end is fixed to the rotary joint through a fixed sleeve. The ink roller cooling device proposed by the utility model has a simple structure, low cost, easy disassembly and maintenance, smooth water circulation, low system pressure, and is safe and reliable.

[0004] While the aforementioned patent disclosure can cool the ink roller, in practice, backflow can sometimes occur due to unstable pressure in the cooling circuit. This backflow not only affects the cooling effect but can also cause unstable operation of the equipment and even damage it. Utility Model Content

[0005] The purpose of the utility model is to provide a cooling device for the ink roller of a printing machine, which can ensure that the cooling water in the cooling circuit can only flow in one direction, avoid the backflow phenomenon caused by unstable pressure in the cooling circuit, and also ensure the safety of the use of the entire cooling system.

[0006] In order to solve the above technical problems, the present invention adopts a technical solution:

[0007] A cooling device for an ink roller of a printing press, comprising:

[0008] Hollow rubber roller;

[0009] An iron core is sleeved in the hollow rubber roller, a flow channel cavity is opened in the iron core, and one-way valve slot structures are opened on both sides of the flow channel cavity;

[0010] a first water inlet pipe, disposed between the two one-way valve slot structures, with one end of the first water inlet pipe extending to the outside of the iron core;

[0011] The blocking component is arranged on one side of the flow channel cavity, and the blocking component is in contact with the outlet end of the first water inlet pipe.

[0012] According to some embodiments, the one-way valve slot structure is a Tesla structure.

[0013] According to some embodiments, the occlusion assembly comprises:

[0014] Guide telescopic rod;

[0015] a plugging head, provided at one end of the guide telescopic rod, wherein one end of the plugging head contacts the outlet end of the first water inlet pipe;

[0016] A spring is sleeved on the guide telescopic rod, one end of the spring abuts against a side wall of the flow channel cavity, and the other end abuts against the blocking head.

[0017] According to some embodiments, the plugging head has a conical structure.

[0018] According to some embodiments, a sealing cylindrical shaft is threadedly sleeved on one end of the iron core, the guiding telescopic rod is provided on one side of the sealing cylindrical shaft embedded in the flow channel cavity, and one end of the spring abuts against the sealing cylindrical shaft.

[0019] According to some embodiments, printing press wall panels are provided at both ends of the iron core, and one end of the iron core is rotatably mounted on one of the printing press wall panels, and one end of the blocking cylindrical shaft is rotatably mounted on the other printing press wall panel.

[0020] According to some embodiments, a rotary joint is rotatably connected to a side of the iron core opposite to the blocking cylindrical axis, a lower portion of the rotary joint is connected to a second water inlet pipe, and one side of the second water inlet pipe is connected to a water return pipe;

[0021] The second water inlet pipe is connected to the first water inlet pipe, and the inner cavity of the return pipe is communicated with the inner cavity of the one-way valve slot structure.

[0022] According to some embodiments, a sealing ring is provided between the connection between the rotary joint and the iron core.

[0023] According to some embodiments, a leakage sensor is provided on one side of the sealing ring, the leakage sensor is located in the inner cavity of the rotary joint, the leakage sensor is electrically connected to an audible and visual alarm, and the audible and visual alarm is provided outside the rotary joint.

[0024] Beneficial effects:

[0025] 1. A first water inlet pipe is provided in the iron core, and a one-way valve slot structure is opened on both sides of the flow channel cavity in the iron core, so that under the action of the first water inlet pipe, a liquid inlet channel is formed, and under the action of the one-way valve slot structure, a coolant return channel is formed. The one-way valve slot can ensure that the cooling water only flows in one direction in the cooling circuit, thereby effectively avoiding the backflow of the cooling water due to unstable pressure in the circuit. At the same time, the one-way flowing cooling water can absorb and transfer heat more effectively, improve the cooling efficiency, and thus ensure that the ink roller of the printing press will not overheat when running at high speed.

[0026] 2. By arranging a blocking component on one side of the inner cavity of the flow channel, the blocking component can effectively prevent the first water inlet pipe from backflowing, so as to ensure that the entire cooling system can only have a one-way flow effect, thereby greatly improving the safety of the cooling system.

[0027] Additional aspects and advantages of the utility model will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0029] Figure 1 It is a cross-sectional view of the utility model;

[0030] Figure 2 for Figure 1 A partial enlarged view of point A shown in FIG;

[0031] Figure 3 for Figure 1 A partial enlarged view of point B shown in FIG;

[0032] Figure 4 This is a schematic diagram of the detection framework flow of the present utility model.

[0033] In the figure, 1 is a hollow rubber roller, 2 is an iron core, 21 is a flow channel cavity, 22 is a one-way valve slot structure, 3 is a first water inlet pipe, 4 is a blocking assembly, 41 is a guide telescopic rod, 42 is a blocking head, 43 is a spring, 5 is a blocking cylindrical shaft, 6 is a printing press wall panel, 7 is a rotary joint, 71 is a second water inlet pipe, 72 is a return pipe, 8 is a sealing ring, 9 is a leakage sensor, and 10 is a sound and light alarm. DETAILED DESCRIPTION

[0034] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0036] In the description of this utility model, terms such as "greater than," "less than," and "exceed" are understood to exclude the number indicated, while terms such as "above," "below," and "within" are understood to include the number indicated. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0037] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0038] Combine Figures 1 to 4 As shown, a cooling device for an inking roller of a printing press includes a hollow rubber roller 1, an iron core 2, a first water inlet pipe 3 and a blocking component 4.

[0039] The iron core 2 is sleeved in the hollow rubber roller 1, and a flow channel cavity 21 is opened in the iron core 2, and a one-way valve groove structure 22 is opened on both sides of the flow channel cavity 21; the first water inlet pipe 3 is arranged between the two one-way valve groove structures 22, and one end of the first water inlet pipe 3 extends to the outside of the iron core 2; the sealing component 4 is arranged on one side of the flow channel cavity 21, and the sealing component 4 is in contact with the outlet end of the first water inlet pipe 3.

[0040] Among them, by arranging a first water inlet pipe 3 in the iron core 2 and opening a one-way valve slot structure 22 on both sides of the flow channel cavity 21 in the iron core 2, a liquid inlet channel is formed under the action of the first water inlet pipe 3, and a coolant reflux channel is formed under the action of the one-way valve slot structure 22, wherein the one-way valve slot can ensure that the cooling water only flows in one direction in the cooling circuit, thereby effectively avoiding the reflux phenomenon of the cooling water due to unstable pressure in the circuit. At the same time, the unidirectional flowing cooling water can more effectively absorb and transfer heat, improve the cooling efficiency, and thus ensure that the ink roller of the printing press will not overheat when running at high speed; by arranging a sealing component 4 on one side of the inner cavity of the flow channel cavity 21, under the action of the sealing component 4, the first water inlet pipe 3 can be effectively prevented from reflux, so as to ensure that the entire cooling system can only flow in one direction, thereby greatly improving the safety of the use of the cooling system.

[0041] To further explain, the one-way valve slot structure 22 is a Tesla structure. The Tesla Valve is a fluid valve without moving parts, invented by Nikola Tesla. Its unique design makes the fluid have low resistance to forward flow and high resistance to reverse flow when passing through the valve, thereby achieving one-way flow control. The Tesla valve can automatically adjust the resistance according to the flow direction of the fluid, ensuring that the coolant has minimal resistance when flowing forward and maximum resistance when flowing reversely, thereby effectively preventing backflow. The design of the Tesla structure allows the fluid to pass smoothly when flowing forward, but is significantly hindered when flowing reversely, ensuring that the coolant only flows in one direction.

[0042] Combine Figure 2 As shown, the plugging assembly 4 includes a guide telescopic rod 41, a plugging head 42, and a spring 43. The plugging head 42 is mounted on one end of the guide telescopic rod 41 and contacts the outlet of the first water inlet pipe 3. The spring 43 is sleeved on the guide telescopic rod 41, with one end of the spring 43 abutting against a side wall of the flow channel cavity 21 and the other end abutting against the plugging head 42. The plugging head 42 has a conical structure.

[0043] Among them, the guiding telescopic rod can ensure that the sealing head 42 is accurately aligned with the outlet end of the first water inlet pipe 3, maintaining the correct position and direction. The design of the conical structure of the sealing head enables it to tightly seal the outlet end of the first water inlet pipe 3 to prevent the coolant from flowing out when not needed. Under the action of the spring 43, it is ensured that the coolant will not flow back into the first water inlet pipe 3, achieving the effect that the first water inlet pipe 3 can only flow in the forward direction. The function of the spring is to provide continuous thrust to ensure that the sealing head is always tightly fitted to the outlet end of the first water inlet pipe.

[0044] When the system is not operating or coolant flow is not required, the plugging head, under the action of the spring, tightly seals the outlet end of the first water inlet pipe to prevent coolant from flowing out. When the system is started and coolant flow is required, the fluid pressure increases, pushing the plugging head away from the outlet end of the first water inlet pipe, allowing coolant to flow out. The coolant then applies a thrust to the plugging head, compressing its spring and opening the outlet end of the first water inlet pipe. Coolant can then flow from the first water inlet pipe into the flow channel cavity. Due to the conical design of the plugging head, it automatically resets under the action of the spring thrust, ensuring the unidirectional flow direction of the coolant and preventing backflow.

[0045] Combine Figure 2 As shown, a sealing cylindrical shaft 5 is threadedly sleeved on one end of the iron core 2, and a guide telescopic rod 41 is provided on one side of the sealing cylindrical shaft 5 embedded in the flow channel cavity 21, and one end of the spring 43 abuts against the sealing cylindrical shaft 5. Since the sealing cylindrical shaft 5 is threadedly connected to the iron core 2, the sealing component 4 can be detachably installed under the action of the sealing cylindrical shaft 5.

[0046] Combine Figure 1 As shown, printing press wall panels 6 are provided at both ends of the iron core 2, with one end of the iron core 2 rotatably mounted on one of the printing press wall panels 6, and one end of the blocking cylindrical shaft 5 rotatably mounted on the other printing press wall panel 6. A rotary joint 7 is rotatably connected to the side of the iron core 2 opposite the blocking cylindrical shaft 5. A second water inlet pipe 71 is connected to the lower portion of the rotary joint 7, and a return pipe 72 is connected to one side of the second water inlet pipe 71. The second water inlet pipe 71 is connected to the first water inlet pipe 3, and the inner cavity of the return pipe 72 is connected to the inner cavity of the one-way valve slot structure 22.

[0047] Among them, the flow path of the fluid is that the second water inlet pipe introduces the fluid into the system and is connected to the first water inlet pipe to ensure a smooth supply of the fluid. When the system starts, the pressure of the coolant increases, which is enough to overcome the resistance provided by the spring 43 in the sealing assembly 4, so that the sealing head 42 is moved away from the outlet end of the first water inlet pipe 3, and the coolant then flows into the flow channel cavity 21 inside the iron core 2. During this process, the coolant will absorb the heat generated by the iron core 2 and the hollow rubber roller 1 to achieve a cooling effect. After the cooling process, the coolant continues to flow to the other end of the iron core 2, and will pass through the one-way valve slot structure 22 on the way. These structures are designed as Tesla valves to ensure that the coolant can only flow in one direction to prevent backflow. The return pipe 72 is connected to the one-way valve slot structure 22 to ensure that the coolant can be discharged smoothly after completing the cooling task, while preventing the coolant from flowing back into the system.

[0048] Continue to combine Figure 1As shown, a sealing ring 8 is provided between the connection between the rotary joint 7 and the iron core 2. The main function of the sealing ring 8 is to ensure that the coolant does not leak in the process of entering the iron core 2 through the rotary joint 7. Due to the restriction that the second water inlet pipe 71 and the return pipe 72 of the rotary joint 7 need to be connected to other external equipment, the rotary joint 7 will not rotate with the rotation of the iron core 2, but has a tendency to rotate relative to the rotation of the iron core 2. The sealing ring 8 can maintain good sealing performance under dynamic conditions, prevent the coolant from leaking from the joint, and ensure the sealing and reliability of the system. The sealing ring 8 is usually made of wear-resistant materials, such as rubber or polytetrafluoroethylene PTFE. These materials can provide a low-friction contact surface during the relative movement between the rotary joint 7 and the iron core 2, reduce wear, and extend the service life of the rotary joint and the iron core.

[0049] Combine Figure 3 As shown, a leakage sensor 9 is provided on one side of the sealing ring 8 , and the leakage sensor 9 is located in the inner cavity of the rotary joint 7 . The leakage sensor 9 is electrically connected to an audible and visual alarm 10 , and the audible and visual alarm 10 is provided on the outside of the rotary joint 7 .

[0050] Among them, the leakage sensor 9 is placed in the inner cavity of the rotary joint 7, close to the sealing ring 8, and the leakage sensor is fixed at an appropriate position in the inner cavity using an appropriate fixing device (such as a bracket, a clamp, etc.) to ensure that it can effectively detect leakage. The leakage sensor 9 can detect whether the sealing ring 8 inside the rotary joint 7 is leaking. When a poor seal causes a medium such as liquid or gas to leak, the leakage sensor can sense this change. The sound and light alarm 10 is installed on the outside of the rotary joint 7, at a position where the operator can easily observe and hear the alarm signal. The leakage sensor 9 is electrically connected to the sound and light alarm 10 through a wire or cable to ensure that the signal can be transmitted from the sensor to the alarm. Once a leak is detected, the leakage sensor 9 will be electrically connected to the sound and light alarm 10, triggering the alarm of the alarm, emitting sound and / or light signals, reminding the operator to pay attention to the leakage and take corresponding measures.

[0051] In some embodiments, in addition to using the leak sensor 9 to detect leaks, the following methods can also be used to detect leaks:

[0052] Pressure monitoring: Install a pressure sensor to monitor the cooling system pressure. If the system pressure drops abnormally, it may indicate a leak.

[0053] Flow Monitoring: Use a flow meter to monitor the flow of coolant. If the flow is lower than expected, it may mean there is a leak in the system.

[0054] Temperature monitoring: Install a temperature sensor to monitor the coolant temperature. If the temperature of a certain part rises abnormally, it may indicate a leak causing coolant loss.

[0055] Humidity or moisture detection: In some cases, a humidity sensor can be used to detect changes in humidity around the cooling system. If the humidity increases, it may indicate a coolant leak.

[0056] Ultrasonic testing: Ultrasonic testing equipment is used to detect the ultrasonic waves generated by the flow of coolant in the system. The leak point will produce a specific ultrasonic signal that can be used to locate the leak.

[0057] Visual inspection: Observe the cooling system for obvious signs of leaks through regular manual inspections or video monitoring systems.

[0058] Infrared thermal imaging inspection: Use an infrared thermal imager to inspect the heat distribution of the cooling system. Leakage areas may show different thermal image characteristics.

[0059] Specifically, leak sensors can usually be capacitive, resistive, photoelectric or ultrasonic sensors:

[0060] Capacitive sensors: These change capacitance by detecting the presence of a medium, such as coolant. When there is a leak, the medium contacts the sensor, causing the capacitance to change, triggering an alarm.

[0061] Resistive sensors: Detect leaks by using changes in the conductivity of the medium. When the leaking medium contacts the sensor, the resistance value changes, triggering an alarm.

[0062] Photoelectric sensors detect the presence of media by emitting and receiving light beams. Leaking media blocks the beam, causing a change in light intensity at the receiving end, triggering an alarm.

[0063] Ultrasonic sensor: emits ultrasonic waves and receives reflected waves. The leak point will generate specific reflected signals, which are analyzed to detect leaks.

[0064] Combine Figure 4 As shown, the working principle of leak detection is as follows:

[0065] The leak sensor monitors the status of the inner cavity of the rotary joint 7 in real time. Once a leak is detected in the sealing ring 8, it immediately generates an electrical signal, which is transmitted to the sound and light alarm 10 via wires or cables. To ensure the stability and anti-interference of signal transmission, shielded cables are usually used. The sound and light alarm 10 has a built-in signal processing unit that amplifies, filters, and determines the threshold of the received signal to confirm whether the alarm condition has been met. When the signal processing unit confirms that the alarm condition has been met, it triggers the working circuit of the sound and light alarm 10, and the alarm emits sound and / or light signals to alert the operator. The sound alarm usually uses a high-frequency buzzer, and the light alarm uses a high-brightness LED light.

[0066] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A cooling device for an ink roller of a printing press, characterized in that: include: Hollow rubber roller (1); An iron core (2) is sleeved in the hollow rubber roller (1), a flow channel cavity (21) is provided in the iron core (2), and one-way valve slot structures (22) are provided on both sides of the flow channel cavity (21); A first water inlet pipe (3) is provided between the two one-way valve slot structures (22), and one end of the first water inlet pipe (3) extends to the outside of the iron core (2); The blocking component (4) is arranged on one side of the flow channel cavity (21), and the blocking component (4) is in contact with the outlet end of the first water inlet pipe (3).

2. The cooling device for the ink roller of a printing press according to claim 1, characterized in that: The one-way valve slot structure (22) is a Tesla structure.

3. The cooling device for the ink roller of a printing press according to claim 1, characterized in that: The blocking component (4) comprises: A guide telescopic rod (41); A plugging head (42) is provided at one end of the guide telescopic rod (41), and one end of the plugging head (42) is in contact with the outlet end of the first water inlet pipe (3); A spring (43) is sleeved on the guide telescopic rod (41), one end of the spring (43) abuts against a side wall of the flow channel cavity (21), and the other end abuts against the blocking head (42).

4. The cooling device for the ink roller of a printing press according to claim 3, characterized in that: The plugging head (42) has a conical structure.

5. The cooling device for the ink roller of a printing press according to claim 3, characterized in that: A sealing cylindrical shaft (5) is threadedly sleeved on one end of the iron core (2); the sealing cylindrical shaft (5) is embedded in the flow channel cavity (21) and provided with the guide telescopic rod (41) on one side; and one end of the spring (43) abuts against the sealing cylindrical shaft (5).

6. The cooling device for the ink roller of a printing press according to claim 5, characterized in that: Printing press wall panels (6) are provided at both ends of the iron core (2), and one end of the iron core (2) is rotatably mounted on one of the printing press wall panels (6), while one end of the blocking cylindrical shaft (5) is rotatably mounted on the other printing press wall panel (6).

7. The cooling device for the ink roller of a printing press according to claim 6, characterized in that: The iron core (2) is rotatably connected to a rotary joint (7) on a side opposite to the blocking cylindrical shaft (5); a second water inlet pipe (71) is connected to the lower part of the rotary joint (7); and a return water pipe (72) is connected to one side of the second water inlet pipe (71); The second water inlet pipe (71) is connected to the first water inlet pipe (3), and the inner cavity of the return water pipe (72) is communicated with the inner cavity of the one-way valve slot structure (22).

8. The cooling device for the ink roller of a printing press according to claim 7, characterized in that: A sealing ring (8) is provided between the connection point between the rotary joint (7) and the iron core (2).

9. The cooling device for the ink roller of a printing press according to claim 8, characterized in that: A leakage sensor (9) is provided on one side of the sealing ring (8), and the leakage sensor (9) is located in the inner cavity of the rotary joint (7). The leakage sensor (9) is electrically connected to an audible and visual alarm (10), and the audible and visual alarm (10) is provided outside the rotary joint (7).

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