Printing liquid alcohol concentration detection device

Abstract

The utility model belongs to the technical field of printing machines, and discloses a printing liquid alcohol concentration detection device which comprises a vertical floating ball channel installed in a printing liquid box body, and a floating ball is arranged in the vertical floating ball channel. An opening is formed in the upper end of the vertical floating ball channel and penetrates through the top plate of the printing liquid box body, a proximity sensor is arranged above the opening of the vertical floating ball channel, and the proximity sensor is connected with a driving mechanism; a water pump is installed on the printing liquid box, an inlet of the water pump is formed in the bottom of the inner side of the printing liquid box, and an outlet of the water pump communicates with the lower end of the vertical floating ball channel. A water outlet hole is formed in the upper portion of the vertical floating ball channel and located above the printing liquid in the printing liquid box body. Printing liquid outside the vertical floating ball channel can be pumped into the vertical floating ball channel through the water pump for real-time detection, the printing liquid in the vertical floating ball channel can be conveniently detected under the condition that the printing liquid does not float, and compared with traditional dynamic detection, the printing liquid detection device is more accurate and higher in controllability.

Description

Technical Field

[0001] This utility model belongs to the field of printing press technology, and specifically relates to a device for detecting the alcohol concentration of printing liquid. Background Technology

[0002] A printing press is a device used to copy text, images, and other information onto the surface of substrates such as paper, plastic, and fabric using printing processes. The printing process requires printing liquid, which typically contains water, dampening solution, and alcohol. Alcohol plays a key role in the printing press as follows:

[0003] 1. Reduce the surface tension of the dampening solution

[0004] Alcohol can effectively reduce the surface tension of dampening solution, making it easier to spread on the blank areas of the printing plate, forming a uniform water film, improving the dampening effect, and preventing problems such as dirty plate caused by uneven dampening.

[0005] 2. Accelerate water evaporation

[0006] Alcohol is highly volatile and can accelerate the evaporation of water in the dampening solution. This can reduce problems such as deformation and wrinkling of paper caused by excessive water absorption during the printing process. At the same time, it helps to control the drying speed of the printing solution and avoid excessive emulsification of ink.

[0007] 3. Adjust the ink viscosity

[0008] Alcohol can appropriately dilute printing liquid, reduce its viscosity, improve its fluidity and transferability, and allow it to be transferred more evenly onto the printing plate and paper, thereby improving printing quality and preventing phenomena such as ink piling and plate smudging.

[0009] 4. Prevent the dampening solution from freezing.

[0010] In low-temperature environments, the water in the dampening solution is prone to freezing, which affects the normal printing process. Alcohol can lower the freezing point of the dampening solution, thus preventing freezing and ensuring that the dampening system can still work normally under low-temperature conditions.

[0011] In conclusion, alcohol plays a crucial role in printing solutions, and its concentration directly affects printing quality. Too low an alcohol concentration may result in unclear printed text or patterns, while too high an alcohol concentration will cause the printed text or patterns to appear lighter in color, leading to significant color differences and increased costs. Therefore, it is optimal to maintain the alcohol concentration within a constant range or value, which requires careful control of the alcohol concentration when preparing the printing solution.

[0012] Existing technology uses a dynamic detection method to detect alcohol concentration. This means that while the float is used to detect alcohol concentration, liquid continues to flow in, causing the float inside the detection device to move constantly and become unstable. This results in a very large error in the detection value. Utility Model Content

[0013] The purpose of this invention is to provide a printing liquid alcohol concentration detection device to solve the problem of large detection errors caused by surface floating of the printing liquid in the prior art.

[0014] To achieve the above objectives, the present invention adopts the following technical solution:

[0015] A printing liquid alcohol concentration detection device includes a vertical float channel installed inside a printing liquid tank, with a float that moves up and down depending on the alcohol concentration of the printing liquid inside the vertical float channel; the upper end of the vertical float channel is open and penetrates the top plate of the printing liquid tank, and a proximity sensor is installed above the opening of the vertical float channel. The proximity sensor is connected to a driving mechanism to control the proximity sensor to approach and contact the float; a water pump is installed on the printing liquid tank, with the inlet of the water pump located at the bottom inside the printing liquid tank and the outlet of the water pump connected to the lower end of the vertical float channel for injecting printing liquid into the vertical float channel; a water outlet is opened at the upper part of the vertical float channel, located above the printing liquid inside the printing liquid tank.

[0016] As a preferred technical solution of this utility model, the driving mechanism includes a servo motor, which is disposed above the printing liquid tank on the side of the proximity sensor. The motor shaft of the servo motor is connected to a vertical drive screw, and a movable block that is slidably connected to the printing liquid tank is threaded on the vertical drive screw. The movable block is connected to the proximity sensor and is used to drive the proximity sensor to slide into the vertical float channel.

[0017] As a preferred technical solution of this utility model, the upper end of the printing liquid tank is fixed with an equipment mounting cover, the servo motor is fixed inside the equipment mounting cover, and a vertically arranged slide rail is also fixed inside the equipment mounting cover. A slider is slidably connected on the slide rail, and the slider is connected to the moving block and the proximity sensor.

[0018] As a preferred technical solution of this utility model, two bearings are installed inside the equipment mounting cover, and the upper and lower ends of the vertical drive screw are respectively connected to the inner rings of the two bearings.

[0019] In a preferred embodiment of this invention, the motor shaft of the servo motor is connected to the upper end of the vertical drive screw via a coupling.

[0020] As a preferred technical solution of this utility model, a horizontal connecting plate is provided on the side of the slider near the proximity sensor, and a vertical adjustment thread is threadedly connected to the horizontal connecting plate. The proximity sensor is connected to the vertical adjustment thread, which is located above the opening of the vertical float channel.

[0021] As a preferred technical solution of this utility model, the horizontal connecting plate is provided with a first through hole, the vertical adjusting thread passes through the first through hole, and two first nuts are threadedly connected to the vertical adjusting thread, the two first nuts respectively abutting against the top surface and bottom surface of the horizontal connecting plate.

[0022] In a preferred embodiment of this invention, the lower part of the vertical adjustment thread is connected to a proximity sensor via a connector. The proximity sensor is mounted on one end of the connector, and the vertical adjustment thread is connected to the other end of the connector.

[0023] As a preferred technical solution of this utility model, the other end of the connector is provided with a second through hole, the vertical adjustment thread passes through the second through hole, and two second nuts are threadedly connected to the vertical adjustment thread. The two second nuts abut against the top surface and bottom surface of the other end of the connector, respectively.

[0024] Beneficial effects: This utility model divides the internal space of the printing liquid tank into two parts through a vertical float channel. When detecting alcohol concentration, the printing liquid outside the vertical float channel can be pumped into the vertical float channel for real-time detection. After only about 30 seconds of stillness, the printing liquid in the vertical float channel will stop floating, thus achieving static detection of alcohol concentration, which is more accurate and controllable than traditional dynamic detection. At the same time, a water outlet is opened at the top of the vertical float channel, located above the printing liquid inside the printing liquid tank, so that the printing liquid outside the vertical float channel will not enter the vertical float channel. When it is necessary to replace the printing liquid in the vertical float channel, the printing liquid in the vertical float channel can be replaced simply by running the water pump for a period of time, which is simple and effective. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] In the diagram: 1-Printing liquid tank; 101-Vertical float channel; 2-Float; 3-Proximity sensor; 4-Servo motor; 5-Vertical drive screw; 6-Moving block; 7-Equipment mounting cover; 8-Slide rail; 9-Slider; 10-Bearing; 11-Coupling; 12-Vertical adjusting thread; 13-First nut; 14-Connector; 15-Second nut. Detailed Implementation

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0028] Example:

[0029] like Figure 1 As shown, this embodiment provides a printing liquid alcohol concentration detection device, including a vertical float channel 101 installed inside the printing liquid tank 1, and a float 2 that floats up and down according to the alcohol concentration of the printing liquid within the vertical float channel 101. Figure 1 As shown, an inlet is preferably provided at the lower end of the vertical float channel 101, allowing the printing liquid in the printing liquid tank 1 to enter the vertical float channel 101 at any time. The float 2 then floats within the vertical float channel 101 based on the alcohol concentration. The upper end of the vertical float channel 101 is open and extends through the top plate of the printing liquid tank 1. A proximity sensor 3 is provided above the opening of the vertical float channel 101 to determine the alcohol concentration in the printing liquid. The proximity sensor 3 is connected to a drive mechanism, which controls the proximity sensor 3 to approach and contact the float 2. The position of the float 2 is determined by the proximity sensor 3 contacting the float 2, and the alcohol concentration is then determined by the position of the float 2. A water pump 16 is installed on the printing liquid tank 1. The inlet of the water pump 16 is located at the bottom inside the printing liquid tank 1 to draw out the printing liquid from the tank. The outlet of the water pump 16 is connected to the lower end of the vertical float channel 101. This method involves injecting printing liquid into the vertical float channel 101 via water pump 16 to further monitor the alcohol concentration in the printing liquid. The advantage of this method is that once water pump 16 stops, the printing liquid in the vertical float channel 101 can separate from the printing liquid in the printing liquid tank 1. This allows the printing liquid in the vertical float channel 101 to remain stable after a certain period of settling when liquid is continuously injected into the printing liquid tank 1. This also prevents the float 2 in the vertical float channel 101 from vibrating up and down, thus ensuring the accuracy of the detection through static monitoring. A water outlet 102 is provided at the top of the vertical float channel 101, located above the printing liquid in the printing liquid tank 1. When re-testing is required, printing liquid can be injected into the vertical float channel 101 for a certain period to replace the printing liquid before allowing it to settle for a certain time before testing.

[0030] This invention divides the internal space of the printing liquid tank 1 into two parts by a vertical float channel 101. When detecting alcohol concentration, the printing liquid outside the vertical float channel 101 can be pumped into the vertical float channel 101 by the water pump 16 for real-time detection. After standing still for about 30 seconds, the printing liquid in the vertical float channel 101 will stop floating, thus achieving static detection of alcohol concentration, which is more accurate and controllable than traditional dynamic detection. At the same time, a water outlet 102 is opened at the upper part of the vertical float channel 101. The water outlet 102 is located above the printing liquid in the printing liquid tank 1, so that the printing liquid outside the vertical float channel 101 will not enter the vertical float channel 101. When it is necessary to replace the printing liquid in the vertical float channel 101, the water pump 16 only needs to work for a period of time to replace the printing liquid in the vertical float channel 101, which is simple and effective.

[0031] The float 2 will float stably up and down under the limit of the vertical float channel 101 as the alcohol concentration in the printing liquid changes. When detecting the alcohol concentration, the servo motor 4 only needs to control the vertical drive screw 5 to rotate, so that the vertical drive screw 5 drives the moving block 6 to slide up and down. Then, the moving block 6 drives the proximity sensor 3 to slide into the vertical float channel 101 and contact the float 2, so that the position of the float 2 can be accurately detected, and the concentration of alcohol in the printing liquid can be determined. The control of the servo motor 4 can also make the detection accuracy higher, and make it easier to control the alcohol concentration more accurately during the process of adding printing liquid.

[0032] As a preferred embodiment of this invention, it should be further explained that the driving mechanism includes a servo motor 4, which is disposed above the printing liquid tank 1 on one side of the proximity sensor 3. The servo motor 4 can be directly fixed above the printing liquid tank 1 or to other components above the printing liquid tank 1 to ensure the stability of the servo motor 4. The motor shaft of the servo motor 4 is connected to a vertical drive screw 5 so that the servo motor 4 can control the rotation of the vertical drive screw 5. A movable block 6 is threadedly connected to the vertical drive screw 5 and slidably connected to the printing liquid tank 1. When the servo motor 4 is turned on, the servo motor 4 drives the vertical drive screw 5 to rotate, and the vertical drive screw 5 drives the movable block 6 to slide up and down. The movable block 6 is connected to the proximity sensor 3 so that the proximity sensor 3 can slide into the vertical float channel 101 through the movable block 6, thereby detecting the position of the float 2.

[0033] It should be noted that, preferably, the proximity sensor 3 is located below one side of the moving block 6, ensuring that the proximity sensor 3 can contact the float 2 when the moving block 6 is sliding.

[0034] As a preferred embodiment of this invention, it should be further explained that, in order to make the installation of the equipment more stable, an equipment mounting cover 7 is fixed to the upper end of the printing liquid tank 1, so that the servo motor 4 can be fixed inside the equipment mounting cover 7, ensuring the relative connection between the servo motor 4 and the printing liquid tank 1. A vertically arranged slide rail 8 is also fixed inside the equipment mounting cover 7, ensuring the relative connection between the slide rail 8 and the printing liquid tank 1. A slider 9 is slidably connected to the slide rail 8, and the slider 9 can slide on the slide rail 8. The slider 9 is connected to the moving block 6 and the proximity sensor 3. So when the vertical drive screw 5 drives the moving block 6 to move, the moving block 6 is limited by the slider 9 and can only slide up and down relative to the printing liquid tank 1, thereby driving the proximity sensor 3 to slide up and down stably.

[0035] As a preferred embodiment of this example, it should be further explained that two bearings 10 are installed inside the equipment mounting cover 7. The outer ring of the bearing 10 is connected to the equipment mounting cover 7 to ensure the stability of the two bearings 10. The upper and lower ends of the vertical drive screw 5 are respectively connected to the inner rings of the two bearings 10 to further enhance the stability of the vertical drive screw 5. The moving block 6 is located between the two bearings 10 to ensure the movable range of the moving block 6.

[0036] As a preferred embodiment of this invention, it should be further explained that the motor shaft of the servo motor 4 is connected to the upper end of the vertical drive screw 5 through the coupling 11 to prevent the connected components from bearing excessive loads and to provide overload protection.

[0037] As a preferred embodiment of this invention, it should be further explained that a horizontal connecting plate is provided on the side of the slider 9 near the proximity sensor 3. A vertical adjusting thread 12 is threadedly connected to the horizontal connecting plate. The upper part of the vertical adjusting thread 12 is threadedly connected to the horizontal connecting plate. Here, it can be directly threaded to the horizontal connecting plate, or it can be indirectly threadedly connected to the horizontal connecting plate by means of other components. The proximity sensor 3 is connected to the vertical adjusting thread 12, specifically located at the lower part of the vertical adjusting thread 12. The vertical adjusting thread 12 is located above the opening of the vertical float channel 101. Thus, within the movement range of the moving block 4, it can be ensured that the proximity sensor 3 can stably contact the float 2.

[0038] As a preferred embodiment of this invention, it should be further explained that the horizontal connecting plate is provided with a first through hole, through which the vertical adjusting thread 12 passes. Two first nuts 13 are threaded onto the vertical adjusting thread 12. The two first nuts 13 abut against the top and bottom surfaces of the horizontal connecting plate, thereby clamping the vertical adjusting thread 12 onto the horizontal connecting plate and realizing the relative connection between the vertical adjusting thread 12 and the horizontal connecting plate. The height difference between the proximity sensor 3 and the moving block 4 on the horizontal plane can also be adjusted by adjusting the position of the two first nuts 13 on the vertical adjusting thread 12, thereby improving flexibility.

[0039] As a preferred embodiment of this invention, it should be further explained that the lower part of the vertical adjustment thread 12 is connected to the proximity sensor 3 through the connector 14. The proximity sensor 3 is installed at one end of the connector 14, and the vertical adjustment thread 12 is connected to the other end of the connector 14, which makes the installation of the proximity sensor 3 simpler.

[0040] As a preferred embodiment of this invention, it should be further explained that the other end of the connector 14 is provided with a second through hole, through which the vertical adjustment thread 12 passes. Two second nuts 15 are threaded onto the vertical adjustment thread 12. The two second nuts 15 abut against the top and bottom surfaces of the other end of the connector 14, respectively. This can also easily adjust the height difference between the proximity sensor 3 and the moving block 4 on the horizontal plane, further improving flexibility.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A device for detecting alcohol concentration in printing liquid, characterized in that, The system includes a vertical float channel (101) installed inside the printing liquid tank (1), with a float (2) inside the vertical float channel (101) that floats up and down depending on the alcohol concentration of the printing liquid; the upper end of the vertical float channel (101) is open and penetrates the top plate of the printing liquid tank (1), and a proximity sensor (3) is installed above the opening of the vertical float channel (101). The proximity sensor (3) is connected to a drive mechanism to control the proximity sensor (3) to approach and connect to the printing liquid tank (1). The printing liquid tank (1) is equipped with a water pump (16). The inlet of the water pump (16) is located at the bottom of the inner side of the printing liquid tank (1). The outlet of the water pump (16) is connected to the lower end of the vertical float channel (101) to inject printing liquid into the vertical float channel (101) through the water pump (16). The upper part of the vertical float channel (101) is provided with a water outlet (102), which is located above the printing liquid in the printing liquid tank (1).

2. The printing liquid alcohol concentration detection device according to claim 1, characterized in that, The driving mechanism includes a servo motor (4), which is located above the printing liquid tank (1) on one side of the proximity sensor (3). The motor shaft of the servo motor (4) is connected to a vertical drive screw (5), and a sliding block (6) is threadedly connected to the vertical drive screw (5) and slidably connected to the printing liquid tank (1). The sliding block (6) is connected to the proximity sensor (3) and is used to drive the proximity sensor (3) to slide into the vertical float channel (101) through the sliding block (6).

3. The printing liquid alcohol concentration detection device according to claim 2, characterized in that, The upper end of the printing liquid tank (1) is fixed with an equipment mounting cover (7), the servo motor (4) is fixed inside the equipment mounting cover (7), and a vertically arranged slide rail (8) is also fixed inside the equipment mounting cover (7). A slider (9) is slidably connected on the slide rail (8), and the slider (9) is connected to the moving block (6) and the proximity sensor (3).

4. The printing liquid alcohol concentration detection device according to claim 3, characterized in that, Two bearings (10) are installed inside the equipment mounting cover (7), and the upper and lower ends of the vertical drive screw (5) are respectively connected to the inner rings of the two bearings (10).

5. A printing liquid alcohol concentration detection device according to any one of claims 2-4, characterized in that, The motor shaft of the servo motor (4) is connected to the upper end of the vertical drive screw (5) via a coupling (11).

6. A printing liquid alcohol concentration detection device according to claim 3 or 4, characterized in that, The slider (9) is provided with a horizontal connecting plate on the side close to the proximity sensor (3). A vertical adjustment thread (12) is threaded onto the horizontal connecting plate. The proximity sensor (3) is connected to the vertical adjustment thread (12). The vertical adjustment thread (12) is located above the opening of the vertical float channel (101).

7. The printing liquid alcohol concentration detection device according to claim 6, characterized in that, The horizontal connecting plate is provided with a first through hole, and the vertical adjusting thread (12) passes through the first through hole. Two first nuts (13) are threaded onto the vertical adjusting thread (12), and the two first nuts (13) abut against the top and bottom surfaces of the horizontal connecting plate respectively.

8. The printing liquid alcohol concentration detection device according to claim 6, characterized in that, The lower part of the vertical adjustment thread (12) is connected to the proximity sensor (3) through the connector (14). The proximity sensor (3) is installed at one end of the connector (14), and the vertical adjustment thread (12) is connected to the other end of the connector (14).

9. The printing liquid alcohol concentration detection device according to claim 8, characterized in that, The other end of the connector (14) is provided with a second through hole, through which the vertical adjustment thread (12) passes. Two second nuts (15) are threaded onto the vertical adjustment thread (12), and the two second nuts (15) abut against the top and bottom surfaces of the other end of the connector (14) respectively.

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