Printing liquid supply equipment

Abstract

The invention belongs to the technical field of printing machines, and discloses printing liquid supply equipment which is characterized in that a printing liquid box body is arranged on the inner bottom surface of an equipment box, and a moisture filling assembly, a fountain solution filling assembly, an alcohol filling assembly, a printing liquid temperature control assembly and a printing water supply pump are arranged above the printing liquid box body; an alcohol concentration detection assembly is further arranged on the printing liquid box body, the alcohol concentration detection assembly comprises a vertical floating ball channel fixed to the inner top face of the printing liquid box body, and a floating ball detection assembly is arranged in the vertical floating ball channel; the bottom of the vertical floating ball channel is provided with a liquid inlet and connected with a first valve through a pipeline, and the first valve communicates with the printing liquid temperature control assembly through a pipeline. A liquid outlet hole is formed in the upper portion of the vertical floating ball channel and located above printing liquid in the printing liquid box body. The precision of an alcohol concentration detection result is guaranteed in a static detection mode, and compared with traditional dynamic detection, the method is more accurate and higher in controllability.

Description

Technical Field

[0001] The present invention belongs to the technical field of printing presses, and particularly relates to a printing liquid water supply device. Background Art

[0002] A printing press is a device used to copy information such as text and images onto the surface of printing substrates such as paper, plastic, and fabric through a printing process. Printing liquid is required during the printing process of a printing press. Existing printing liquid generally contains water, dampening solution, and alcohol. Alcohol mainly has the following functions in a printing press:

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

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

[0005] 2. Accelerate water evaporation

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

[0007] 3. Adjust the ink viscosity

[0008] Alcohol can appropriately dilute the printing liquid, reduce the viscosity of the printing liquid, improve the fluidity and transferability of the printing liquid, enable the printing liquid to be transferred more evenly onto the printing plate and the paper, improve the printing quality, and prevent phenomena such as ink accumulation and plate smudging.

[0009] 4. Prevent the dampening solution from freezing

[0010] In a low-temperature environment, the water in the dampening solution is prone to freezing, affecting the normal progress of printing. Alcohol can lower the freezing point of the dampening solution, playing an antifreeze role and ensuring that the dampening system can still work normally under low-temperature conditions.

[0011] In summary, alcohol plays a very important role in the printing liquid, and the alcohol concentration is also related to the printing quality. If the alcohol concentration is too low, the printed text or pattern may be unclear. If the alcohol concentration is too high, the color of the printed text or pattern will become lighter, the color difference will be relatively large, and the cost will also increase. Therefore, it is best when the alcohol concentration needs to be maintained within a constant range or value. This requires controlling the alcohol concentration well when preparing the printing liquid.

[0012] The existing technology uses a dynamic detection method when detecting the alcohol concentration. That is, when detecting the alcohol concentration using a floating ball, there is still liquid continuously flowing in. In this way, the floating ball in the detection device will keep moving and is unstable, resulting in a very large error in the detection value. Summary of the Invention

[0013] The object of the present invention is to provide a printing liquid water supply device to solve the problem of large detection errors caused by the floating of the surface of the printing liquid to be detected in the prior art.

[0014] To achieve the above object, the present invention adopts the following technical solutions:

[0015] A printing liquid water supply device includes an equipment box. The inner bottom surface of the equipment box is provided with a printing liquid box body. Above the printing liquid box body, there are a moisture addition component, a dampening solution addition component, an alcohol addition component, a printing liquid temperature control component, and a printing water pump for supplying printing liquid to a printing machine. An alcohol concentration detection component is also provided on the printing liquid box body. The alcohol concentration detection component includes a vertical floating ball channel fixed to the inner top surface of the printing liquid box body, and a floating ball detection component is arranged in the vertical floating ball channel; a liquid inlet is provided at the bottom of the vertical floating ball channel and is connected to a first valve through a pipeline, and the first valve is communicated with the printing liquid temperature control component through a pipeline to inject printing liquid into the vertical floating ball channel through the first valve when the printing liquid temperature control component is working; a liquid outlet hole is opened in the upper part of the vertical floating ball channel, and the liquid outlet hole is located above the printing liquid in the printing liquid box body.

[0016] As a preferred technical solution in the present invention, the floating ball detection component includes a proximity sensor and a floating ball arranged in the vertical floating ball channel. The upper end of the vertical floating ball channel is open and penetrates through the top plate of the printing liquid box body, and the proximity sensor is located above the opening of the vertical floating ball channel; an equipment installation cover installed on the printing liquid box body is provided outside the proximity sensor. A servo motor is installed in the equipment installation cover. The motor shaft of the servo motor is connected to a vertical driving screw rod, and a moving block slidably connected in the equipment installation cover is threadedly connected to the vertical driving screw rod. The moving block is connected to the proximity sensor to drive the proximity sensor to slide into the vertical floating ball channel through the moving block.

[0017] As a preferred technical solution in the present invention, a vertical sliding rail fixed to the equipment installation cover is arranged between the vertical driving screw rod and the proximity sensor. A slider is slidably connected to the vertical sliding rail, and both sides of the slider are respectively connected to the moving block and the proximity sensor.

[0018] As a preferred technical solution in the present invention, a horizontal connecting plate is arranged on one side of the slider. A vertical adjusting thread is penetrated through the horizontal connecting plate, and two first nuts are threadedly connected to the vertical adjusting thread. The two first nuts respectively abut against the top surface and the bottom surface of the horizontal connecting plate; a connecting piece is fixed to the proximity sensor. The vertical adjusting thread penetrates through one end of the connecting piece far from the proximity sensor, and two second nuts are threadedly connected to the lower part of the vertical adjusting thread. The two second nuts respectively abut against the top surface and the bottom surface of one end of the connecting piece.

[0019] As a preferred technical solution in the present invention, the motor shaft of the servo motor is connected to the upper end of the vertical driving screw through a coupling. Two bearings are installed inside the equipment installation cover, and the upper and lower ends of the vertical driving screw are respectively connected to the inner rings of the two bearings.

[0020] As a preferred technical solution in the present invention, the dampening solution filling assembly includes a dampening solution replenishment tank, a dampening solution flowmeter, and a second valve. The outlet of the dampening solution replenishment tank communicates with the inlet of the second valve through the dampening solution flowmeter, and the outlet of the second valve communicates with the inside of the printing solution tank. The height of the second valve in the horizontal direction is located between the dampening solution replenishment tank and the printing solution tank; the alcohol filling assembly includes an alcohol replenishment tank and a third valve. The outlet of the alcohol replenishment tank communicates with the inlet of the third valve, and the outlet of the third valve communicates with the inside of the printing solution tank. The height of the third valve in the horizontal direction is located between the alcohol replenishment tank and the printing solution tank; the moisture filling assembly includes a water injection pipe, a moisture flowmeter, and a fourth valve. The inlet of the water injection pipe communicates with the tap water pipeline, and the outlet of the water injection pipe communicates with the inlet of the fourth valve through the moisture flowmeter. The outlet of the fourth valve communicates with the inside of the printing solution tank.

[0021] As a preferred technical solution in the present invention, both the first valve and the third valve include a valve housing, a ball valve, and a cylinder disposed inside the valve housing. The inlet of the ball valve communicates with the alcohol replenishment tank or the printing solution temperature control assembly through a pipeline. The tail of the cylinder block is rotatably connected inside the valve housing, and the end of the telescopic rod of the cylinder is rotatably connected with an adjusting rod. The end of the adjusting rod away from the cylinder is fixedly connected to the end of the valve stem of the ball valve.

[0022] As a preferred technical solution in the present invention, the printing solution temperature control assembly includes a refrigeration water pump and a heat exchanger with refrigerant inside. Both the refrigeration water pump and the heat exchanger are installed inside the equipment box. The printing solution in the printing solution tank is input into the heat exchanger through the refrigeration water pump for cooling, and the cooled printing solution in the heat exchanger is input into the printing solution tank through the refrigeration water pump; a temperature sensor for detecting the temperature of the printing solution is installed on the heat exchanger; the cooled printing solution in the heat exchanger also communicates with the liquid inlet of the vertical float channel through the first valve.

[0023] As a preferred technical solution in the present invention, the printing solution temperature control assembly further includes a refrigerant storage tank, a compressor, and a condenser installed inside the equipment box. The outlet of the refrigerant storage tank is sequentially connected to the refrigerant inlet of the heat exchanger through a dryer, a check valve, and an expansion valve. The refrigerant outlet of the heat exchanger is connected to the inlet of the compressor through the compressor, and the outlet of the condenser is connected to the inlet of the refrigerant storage tank.

[0024] As a preferred technical solution in the present invention, a control box and a control display screen are further installed on the equipment box, and the control box is electrically connected to the control display screen, the moisture filling component, the dampening solution filling component, the alcohol filling component, the printing liquid temperature control component, the printing water supply pump, and the first valve.

[0025] Beneficial effects: In the process of controlling the temperature of the printing liquid in the printing liquid tank by using the printing liquid temperature control component of the present invention, the first valve can be opened by the way to inject the printing liquid into the vertical float channel. After the injection is completed, it is left standing for a period of time. When the printing liquid in the vertical float channel no longer floats, the float detection component is used to detect the alcohol concentration. Furthermore, the accuracy of the alcohol concentration detection result is ensured by the static detection method, which is more accurate and has higher controllability than the traditional dynamic detection. At the same time, a liquid outlet hole is opened at the upper part of the vertical float channel, and the liquid outlet hole is located above the printing liquid in 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, only need to inject the printing liquid into the vertical float channel for a period of time, then the replacement of the printing liquid in the vertical float channel can be realized, and multiple detections of the printing liquid can be completed, which is simple and effective. Description of the Drawings

[0026] Figure 1 is a structural schematic diagram of the present invention;

[0027] Figure 2 is a partial structural schematic diagram of the present invention;

[0028] Figure 3 is a schematic diagram of the alcohol filling component in the present invention.

[0029] In the figure: 1 - equipment box; 101 - vertical float channel; 102 - liquid outlet hole; 2 - printing liquid tank; 3 - printing water supply pump; 4 - first valve; 5 - proximity sensor; 6 - float; 7 - equipment installation cover; 8 - servo motor; 9 - vertical drive screw; 10 - moving block; 11 - vertical slide rail; 12 - slider; 13 - vertical adjustment thread; 14 - first nut; 15 - connecting piece; 16 - second nut; 17 - coupling; 18 - bearing; 19 - dampening solution replenishment tank; 20 - dampening solution flowmeter; 21 - second valve; 22 - alcohol replenishment tank; 23 - third valve; 24 - water injection pipe; 25 - moisture flowmeter; 26 - fourth valve; 27 - ball valve; 28 - cylinder; 29 - adjusting rod; 30 - refrigeration water pump; 31 - heat exchanger; 32 - refrigerant storage tank; 33 - compressor; 34 - condenser. Detailed Embodiments

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the accompanying drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but do not constitute a limitation to the present invention.

[0031] Embodiment:

[0032] As Figure 1 、 Figure 2 and Figure 3 shown, this embodiment provides a printing liquid water supply device, including a device box 1. The inner bottom surface of the device box 1 is provided with a printing liquid box 2. Above the printing liquid box 2, there are a water addition component, a dampening solution addition component, an alcohol addition component, a printing liquid temperature control component, and a printing water pump 3 for supplying printing liquid to the printing press. During actual operation, the printing water pump 3 can supply printing liquid to the printing press to ensure the printing effect of the printing press. The printing liquid temperature control component is used to control the temperature of the printing liquid in the printing liquid box 2 to avoid alcohol volatilization caused by too high a temperature of the printing liquid, and also avoid condensation water in the pipelines of the printing press caused by too low a temperature of the printing liquid. The water addition component is used to supplement water into the printing liquid box 2, the dampening solution addition component is used to supplement dampening solution into the printing liquid box 2, and the alcohol addition component is used to supplement alcohol into the printing liquid box 2 to ensure the sufficiency of the printing liquid in the printing liquid box 2.

[0033] Based on the above structure, an alcohol concentration detection component is further provided on the printing liquid tank body 2. The alcohol concentration detection component includes a vertical float channel 101 fixed to the inner top surface of the printing liquid tank body 2. A float detection component is arranged in the vertical float channel 101 to facilitate detecting the alcohol concentration in the printing liquid in the vertical float channel 101 through the float detection component. An inlet is provided at the bottom of the vertical float channel 101 and is connected to a first valve 4 through a pipeline. The first valve 4 is communicated with the printing liquid temperature control component through a pipeline, and is used to inject printing liquid into the vertical float channel 101 through the first valve 4 when the printing liquid temperature control component is working. That is, during the process of controlling the temperature of the printing liquid in the printing liquid tank body 2 by the printing liquid temperature control component, if it is necessary to detect the alcohol concentration in the printing liquid, the first valve 4 can be opened to make the printing liquid flow into the vertical float channel 101, and then the float detection component is used to detect the alcohol concentration. By using the first valve 4 to control the printing liquid flowing into the vertical float channel 101, after the printing liquid flows into the vertical float channel 101, it can be selected to stand for a period of time, such as 30 s, and wait until the printing liquid in the vertical float channel 101 stops floating, and then the alcohol concentration is detected by the float detection component, thereby ensuring the accuracy of the alcohol concentration detection result. An outlet hole 102 is opened in the upper part of the vertical float channel 101. The outlet hole 102 is located above the printing liquid in the printing liquid tank body 2, 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, only by injecting printing liquid into the vertical float channel 101 for a period of time can the replacement of the printing liquid be realized.

[0034] During the process of controlling the temperature of the printing liquid in the printing liquid tank body 2 by using the printing liquid temperature control component in the present invention, the first valve 4 can be opened by the way to inject the printing liquid into the vertical float channel 101. After the injection is completed, it stands for a period of time. When the printing liquid in the vertical float channel 101 stops floating, the float detection component is used to detect the alcohol concentration, and then the accuracy of the alcohol concentration detection result is ensured through the static detection method, which is more accurate and has higher controllability than the traditional dynamic detection. At the same time, an outlet hole 102 is opened in the upper part of the vertical float channel 101. The outlet hole 102 is located above the printing liquid in the printing liquid tank body, 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, only by injecting printing liquid into the vertical float channel 101 for a period of time (such as 2 minutes), the replacement of the printing liquid in the vertical float channel can be realized, and multiple detections of the printing liquid can be completed, which is simple and effective.

[0035] It should be noted that in practice, a liquid level sensor will be installed in the printing liquid tank 2. After the device is powered on, the liquid level sensor also starts to work and transmits data in real time (the liquid level sensor also uses 485 communication, which is smaller in volume and stronger in anti-interference than ordinary analog sensors), detecting the liquid level in the printing liquid tank 2, facilitating the addition of water, dampening solution, and alcohol when the liquid level is insufficient, and also stopping the addition after reaching the required level.

[0036] As a preferred implementation in this embodiment, it should be further noted that the floating ball detection assembly includes a proximity sensor 5 and a floating ball 6 disposed in the vertical floating ball channel 101. The upper end of the vertical floating ball channel 101 is open and penetrates the top plate of the printing liquid tank 2. The proximity sensor 5 is located above the opening of the vertical floating ball channel 101. In practice, when the printing liquid is injected into the vertical floating ball channel 101, the floating ball 6 floats on the surface of the printing liquid, and the floating position can be detected by the contact between the proximity sensor 5 and the floating ball 6; an equipment mounting cover 7 installed on the printing liquid tank 2 is provided outside the proximity sensor 5. A servo motor 8 is installed in the equipment mounting cover 7. The motor shaft of the servo motor 8 is connected to a vertical driving screw 9. A moving block 10 slidably connected in the equipment mounting cover 7 is threadedly connected to the vertical driving screw 9. Then, after the servo motor 8 is started, the servo motor 8 can drive the vertical driving screw 9 to rotate, and the vertical driving screw 9 can drive the moving block 10 to slide up and down. The moving block 10 is connected to the proximity sensor 5, so as to drive the proximity sensor 5 to slide into the vertical floating ball channel 101 through the moving block 10, so that the proximity sensor 5 can contact the floating ball 6, and the alcohol concentration of the printing liquid can be calculated by detecting the position of the floating ball 6.

[0037] As a preferred implementation in this embodiment, it should be further noted that a vertical slide rail 11 fixed to the equipment mounting cover 7 is provided between the vertical driving screw 9 and the proximity sensor 5. A slider 12 is slidably connected to the vertical slide rail 11. Both sides of the slider 12 are respectively connected to the moving block 10 and the proximity sensor 5. By means of the vertical slide rail 11, it is ensured that the slider 12 can only slide up and down stably, and then by the slider 12, it is ensured that the moving block 10 can slide up and down stably, and then the proximity sensor 5 connected to the slider 12 is driven to slide up and down stably through the moving block 10.

[0038] As a preferred implementation in this embodiment, it should be further noted that a horizontal connecting plate is provided on one side of the slider 12, and a vertical adjusting screw 13 is passed through the horizontal connecting plate. Two first nuts 14 are threadedly connected to the vertical adjusting screw 13, and the two first nuts 14 respectively abut against the top surface and the bottom surface of the horizontal connecting plate; a connecting member 15 is fixed on the proximity sensor 5, and the vertical adjusting screw 13 penetrates through one end of the connecting member 15 away from the proximity sensor 5, and two second nuts 16 are threadedly connected to the lower part of the vertical adjusting screw 13, and the two second nuts 16 respectively abut against the top surface and the bottom surface of one end of the connecting member 15. In this way, the relative position of the vertical adjusting screw 13 in the vertical direction of the horizontal connecting plate can be adjusted, and the relative position of the proximity sensor 5 in the vertical direction of the vertical adjusting screw 13 can also be adjusted. Furthermore, when the moving block 10 slides, it is ensured that the proximity sensor 5 can enter the vertical float channel 101 and contact the float 6.

[0039] As a preferred implementation in this embodiment, it should be further noted that the motor shaft of the servo motor 8 is connected to the upper end of the vertical driving screw 9 through a coupling 17 for overload protection. Two bearings 18 are installed in the equipment installation cover 7, and the upper and lower ends of the vertical driving screw 9 are respectively connected to the inner rings of the two bearings 18 to further enhance the stability of the vertical driving screw 9, while the moving block 10 is located between the two bearings 18 to ensure the movable range of the moving block 10.

[0040] As a preferred implementation in this embodiment, it should be further noted that the dampening solution filling assembly includes a dampening solution replenishment tank 19, a dampening solution flowmeter 20, and a second valve 21. The outlet of the dampening solution replenishment tank 19 is connected to the inlet of the second valve 21 through the dampening solution flowmeter 20, and the outlet of the second valve 21 is connected to the inside of the printing solution tank body 2. During the process of filling the dampening solution, the filling amount of the dampening solution is controlled by the dampening solution flowmeter 20, and the height of the second valve 21 in the horizontal direction is located between the dampening solution replenishment tank 19 and the printing solution tank body 2; the alcohol filling assembly includes an alcohol replenishment tank 22 and a third valve 23. The outlet of the alcohol replenishment tank 22 is connected to the inlet of the third valve 23, and the outlet of the third valve 23 is connected to the inside of the printing solution tank body 2. The height of the third valve 23 in the horizontal direction is located between the alcohol replenishment tank 22 and the printing solution tank body 2; it should be noted here that preferably, the dampening solution replenishment tank 19 and the alcohol replenishment tank 22 are arranged in parallel and are both arranged on the inner wall of one side of the printing solution tank body 1; the water filling assembly includes a water injection pipe 24, a water flowmeter 25, and a fourth valve 26. The inlet of the water injection pipe 24 is connected to the tap water pipeline, and the outlet of the water injection pipe 24 is connected to the inlet of the fourth valve 26 through the water flowmeter 25, and the outlet of the fourth valve 26 is connected to the inside of the printing solution tank body 2. During the process of filling water, the filling amount is monitored by the water flowmeter 25.

[0041] It should be noted that the traditional printing liquid tank 1 fills the dampening solution and alcohol by the siphon method. The redundant water of the water pump flows back to generate siphon suction to fill the liquid. However, as the filling time goes by, the flow rate of the water pump decreases, and the siphon suction also decreases accordingly. Sometimes, it simply cannot suck up, resulting in inaccurate and variable flow rates during liquid filling. Also, because the feeding ports of this siphon structure are very small, it is easy to be blocked with a little carelessness. In this application, the height of the second valve 21 in the horizontal direction is located between the dampening solution replenishing tank 19 and the printing liquid tank 2, and the height of the third valve 23 in the horizontal direction is located between the alcohol replenishing tank 22 and the printing liquid tank 2. When replenishing materials, the liquid in the replenishing solution tank can automatically flow into the printing liquid tank under the action of gravity, realizing the replenishment of the printing liquid water supply device. In this way, the flow rate can be ensured to be stable, and thus the filling of the liquid can be controlled more precisely compared with the siphon structure. A thicker pipeline can be selected to avoid blockage.

[0042] As a preferred implementation in this embodiment, it should be further noted that both the first valve 4 and the third valve 23 include a valve housing and a ball valve 27 and a cylinder 28 arranged inside the valve housing. The inlet of the ball valve 27 is connected to the alcohol replenishing tank 22 or the printing liquid temperature control component through a pipeline. The tail of the cylinder body of the cylinder 28 is rotatably connected inside the valve housing. The end of the telescopic rod of the cylinder 28 is rotatably connected to an adjusting rod 29. The end of the adjusting rod 29 away from the cylinder 28 is fixedly connected to the end of the valve stem of the ball valve 27. In practice, the cylinder 28 can be used to control the swinging of the adjusting rod 29, and the swinging of the adjusting rod 29 can drive the valve stem to act, ultimately realizing the opening and closing control of the ball valve 27. Here, it should be noted that in practice, there are no conductive components inside the ball valve 27, so there will be no phenomenon of heating due to electricity. In this way, the safety hazard caused by the heated conductive components coming into contact with alcohol can be avoided.

[0043] As a preferred implementation in this embodiment, it should be further noted that the printing liquid temperature control component includes a refrigeration water pump 30 and a heat exchanger 31 with refrigerant inside. The refrigeration water pump 30 and the heat exchanger 31 are both installed in the equipment box 1. The printing liquid in the printing liquid box 2 is input into the heat exchanger 31 through the refrigeration water pump 30 for cooling, and the cooled printing liquid in the heat exchanger 31 is input into the printing liquid box 2 through the refrigeration water pump 30; a temperature sensor for detecting the temperature of the printing liquid is installed on the heat exchanger 31. Furthermore, a circulating printing liquid channel is formed between the heat exchanger 31 and the printing liquid box 2 through the refrigeration water pump 30 to achieve effective temperature control of the printing liquid. The temperature sensor then monitors the temperature of the printing liquid in real time. The temperature sensor preferably adopts a high-precision integrated anti-corrosion 485 communication sensor, with real-time data, high precision, anti-interference, and anti-corrosion; the cooled printing liquid in the heat exchanger 31 also passes through the first valve 4 to connect to the liquid inlet of the vertical float channel 101, which can be achieved through a three-way valve here, facilitating the injection of the printing liquid into the vertical float channel 101.

[0044] The present invention adopts a dual-pump design of the refrigeration water pump 30 and the printing water supply pump 3, and also has the following advantages:

[0045] Strong practicability: In terms of the water pump, a dual-pump design is adopted. The purpose is to be able to meet the use of various printing machines of different sizes in the current market. For some models, having one more pump will result in insufficient water supply.

[0046] (2) High efficiency. The printing water supply pump 3 is specifically for supplying printing liquid to the printing machine, providing sufficient and uninterrupted water supply for printing. The refrigeration water pump 30 is specifically for refrigeration and alcohol concentration detection water supply. The cooling effect of the printing liquid is fast, reducing the use time of the compressor, saving energy and reducing emissions. It also has an important role in fully stirring water, alcohol, and dampening solution, improving the utilization rate of alcohol and dampening solution, thereby reducing printing costs. The uniform printing liquid can better achieve ink-water balance, ensure printing quality, and lay a foundation for printing high-quality products.

[0047] As a preferred implementation in this embodiment, it should be further noted that the printing liquid temperature control component further includes a refrigerant storage tank 32, a compressor 33, and a condenser 34 installed in the equipment box 1. The outlet of the refrigerant storage tank 32 is connected to the refrigerant inlet of the heat exchanger 31 in sequence through a dryer, a check valve, and an expansion valve. The refrigerant outlet of the heat exchanger 31 is connected to the inlet of the condenser 34 through the compressor 33, and the outlet of the condenser 34 is connected to the inlet of the refrigerant storage tank 32. After the compressor 33 is started, the refrigerant changes from gaseous state to liquid state, and heat is generated during this process. The liquid refrigerant is cooled by the condenser 34 and then enters the refrigerant storage tank 32. The liquid refrigerant will become gaseous after passing through the expansion valve, and heat is absorbed during this process. Then it enters the heat exchanger to take away the heat in the printing liquid. The gaseous refrigerant returns to the compressor again, and the refrigeration process is completed through repeated cycles. After the temperature of the printing liquid reaches the set value, the compressor 33 stops working.

[0048] As a preferred implementation in this embodiment, it should be further noted that a control box and an operation display screen are also installed on the equipment box 1. The control box is electrically connected to the operation display screen, the water injection component, the dampening solution injection component, the alcohol injection component, the printing liquid temperature control component, the printing water pump 3, and the first valve 4, which is convenient for realizing intelligent control and making the control easier.

[0049] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A printing liquid water supply device, characterized in that, It includes an equipment box (1). A printing liquid box body (2) is arranged on the inner bottom surface of the equipment box (1). Above the printing liquid box body (2), there are a water filling component, a dampening solution filling component, an alcohol filling component, a printing liquid temperature control component, and a printing water pump (3) for supplying printing liquid to a printing machine. An alcohol concentration detection component is also arranged on the printing liquid box body (2). The alcohol concentration detection component includes a vertical float channel (101) fixed to the inner top surface of the printing liquid box body (2), and a float detection component is arranged in the vertical float channel (101); a liquid inlet is arranged at the bottom of the vertical float channel (101) and is connected to a first valve (4) through a pipeline. The first valve (4) is connected to the printing liquid temperature control component through a pipeline, so as to inject printing liquid into the vertical float channel (101) through the first valve (4) when the printing liquid temperature control component works; a liquid outlet hole (102) is opened in the upper part of the vertical float channel (101), and the liquid outlet hole (102) is located above the printing liquid in the printing liquid box body (2).

2. The printing liquid water supply device according to claim 1, characterized in that, The float detection component includes a proximity sensor (5) and a float (6) arranged in the vertical float channel (101). The upper end of the vertical float channel (101) is open and penetrates through the top plate of the printing liquid box body (2). The proximity sensor (5) is located above the opening of the vertical float channel (101); an equipment installation cover (7) installed on the printing liquid box body (2) is arranged outside the proximity sensor (5). A servo motor (8) is installed in the equipment installation cover (7). The motor shaft of the servo motor (8) is connected to a vertical driving screw rod (9). A moving block (10) slidably connected in the equipment installation cover (7) is threadedly connected to the vertical driving screw rod (9). The moving block (10) is connected to the proximity sensor (5), so as to drive the proximity sensor (5) to slide into the vertical float channel (101) through the moving block (10).

3. The printing liquid water supply device according to claim 2, wherein, A vertical slide rail (11) fixed to the equipment installation cover (7) is arranged between the vertical driving screw rod (9) and the proximity sensor (5). A slider (12) is slidably connected to the vertical slide rail (11). The two sides of the slider (12) are respectively connected to the moving block (10) and the proximity sensor (5).

4. The printing fluid water supply device according to claim 3, characterized in that, A horizontal connecting plate is arranged on one side of the slider (12). A vertical adjusting thread (13) penetrates through the horizontal connecting plate. Two first nuts (14) are threadedly connected to the vertical adjusting thread (13), and the two first nuts (14) respectively abut against the top surface and the bottom surface of the horizontal connecting plate; a connecting piece (15) is fixed to the proximity sensor (5). The vertical adjusting thread (13) penetrates through one end of the connecting piece (15) away from the proximity sensor (5), and two second nuts (16) are threadedly connected to the lower part of the vertical adjusting thread (13), and the two second nuts (16) respectively abut against the top surface and the bottom surface of one end of the connecting piece (15).

5. A printing liquid water supply device according to any one of claims 2-4, characterized in that, The motor shaft of the servo motor (8) is connected to the upper end of the vertical driving screw (9) through a coupling (17). Two bearings (18) are installed in the equipment installation cover (7), and the upper and lower ends of the vertical driving screw (9) are respectively connected to the inner rings of the two bearings (18).

6. A printing liquid water supply device according to claim 1, characterized in that, The dampening solution filling assembly includes a dampening solution replenishment tank (19), a dampening solution flowmeter (20) and a second valve (21). The outlet of the dampening solution replenishment tank (19) is connected to the inlet of the second valve (21) through the dampening solution flowmeter (20), and the outlet of the second valve (21) is connected to the inside of the printing solution tank body (2). The height of the second valve (21) in the horizontal direction is between the dampening solution replenishment tank (19) and the printing solution tank body (2). The alcohol filling assembly includes an alcohol replenishment tank (22) and a third valve (23). The outlet of the alcohol replenishment tank (22) is connected to the inlet of the third valve (23), and the outlet of the third valve (23) is connected to the inside of the printing solution tank body (2). The height of the third valve (23) in the horizontal direction is between the alcohol replenishment tank (22) and the printing solution tank body (2). The water filling assembly includes a water injection pipe (24), a water flowmeter (25) and a fourth valve (26). The inlet of the water injection pipe (24) is connected to the tap water pipe, and the outlet of the water injection pipe (24) is connected to the inlet of the fourth valve (26) through the water flowmeter (25). The outlet of the fourth valve (26) is connected to the inside of the printing solution tank body (2).

7. A printing liquid water supply device according to claim 6, characterized in that, Both the first valve (4) and the third valve (23) include a valve housing and a ball valve (27) and a cylinder (28) arranged inside the valve housing. The inlet of the ball valve (27) is connected to the alcohol replenishment tank (22) or the printing solution temperature control assembly through a pipe. The tail of the cylinder body of the cylinder (28) is rotatably connected inside the valve housing, and the end of the telescopic rod of the cylinder (28) is rotatably connected to an adjusting rod (29). The end of the adjusting rod (29) away from the cylinder (28) is fixedly connected to the valve stem end of the ball valve (27).

8. A printing liquid water supply device according to claim 1, characterized in that, The printing solution temperature control assembly includes a refrigeration water pump (30) and a heat exchanger (31) with refrigerant inside. The refrigeration water pump (30) and the heat exchanger (31) are both installed in the equipment box (1). The printing solution in the printing solution tank body (2) is input into the heat exchanger (31) through the refrigeration water pump (30) for cooling, and the cooled printing solution in the heat exchanger (31) is input into the printing solution tank body (2) through the refrigeration water pump (30). A temperature sensor for detecting the temperature of the printing solution is installed on the heat exchanger (31). The cooled printing solution in the heat exchanger (31) is also connected to the liquid inlet of the vertical float channel (101) through the first valve (4).

9. The printing liquid water supply device according to claim 8, characterized in that, The printing liquid temperature control assembly further includes a refrigerant storage tank (32), a compressor (33), and a condenser (34) installed in the equipment box (1). The outlet of the refrigerant storage tank (32) is connected to the refrigerant inlet of the heat exchanger (31) in sequence through a dryer, a check valve, and an expansion valve. The refrigerant outlet of the heat exchanger (31) is connected to the inlet of the condenser (34) through the compressor (33), and the outlet of the condenser (34) is connected to the inlet of the refrigerant storage tank (32).

10. A printing liquid water supply device according to claim 1, characterized in that, A control box and an operation display screen are further installed on the equipment box (1). The control box is electrically connected to the operation display screen, the water addition assembly, the dampening solution addition assembly, the alcohol addition assembly, the printing liquid temperature control assembly, the printing water pump (3), and the first valve (4).

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