Intelligent ink combined supply system and printing system

Abstract

The utility model relates to the technical field of printing, in particular to an intelligent ink combined supply system and a printing system, which are suitable for supplying ink to a liquid container of production equipment, a liquid level sensing device is arranged in the liquid container, the intelligent ink combined supply system comprises at least two containers, the containers are used for containing ink, and the containers are used for containing ink. A liquid level sensor is arranged in at least one container; one end of the connecting pipeline is connected with the at least two containers, and the other end of the connecting pipeline is suitable for being connected with the liquid container; the pump is arranged on the connecting pipeline; and the control system is connected with the liquid level sensor, the liquid level sensing device and the pump, and is used for controlling the intelligent ink combined supply system to work according to signals of the sensors so as to supplement liquid into the liquid container. The intelligent ink combined supply system and the corresponding printing system are large in capacity, stable in ink supply, high in automation degree, low in cost, safe, environment-friendly and efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of printing, and in particular to an intelligent ink joint supply system and a printing system. Background Art

[0002] The centralized automatic ink supply system is an ink supply solution designed for large-scale printing operations. It is mainly used in large-format printers or high-capacity printing production lines to ensure the continuity and stability of ink supply during the printing process. However, the centralized ink supply system consumes a large amount of ink and requires timely ink replenishment and replacement.

[0003] The prior art discloses an automatic ink supply system for a large-scale fabric printer, which detects that the printer ink cartridge is short of ink, manually moves a cartridge of a specific color to the printer, and supplies ink to the ink cartridge with a suction pump and a straw.

[0004] Since large-scale printing operations consume a large amount of ink, the barrel needs to be frequently loaded and unloaded, and normal printing cannot be achieved during the barrel replacement process. In the prior art, the barrel loading and unloading operations need to be completed manually, and the manual replacement efficiency is low, which leads to low printing efficiency. Utility Model Content

[0005] In view of this, the utility model provides an intelligent ink joint supply system and a printing system to solve the problem of low automation of ink supply in large-scale printing production.

[0006] In a first aspect, the utility model provides an intelligent ink supply system, which is suitable for supplying ink to a liquid container of a production device, wherein a liquid level sensor is provided in the liquid container, and is characterized in that the intelligent ink supply system comprises:

[0007] At least two containers, the containers are interconnected and used to contain ink, and at least one of the containers is provided with a liquid level sensor;

[0008] A connecting pipeline, one end of which is connected to the at least two containers and the other end of which is suitable for connecting to the liquid container;

[0009] A pump, arranged on the connecting pipeline;

[0010] A control system is connected to the liquid level sensor, the liquid level sensing device and the pump, and is suitable for controlling the pump to drive the ink to flow into the liquid container when the liquid level sensing device detects that the ink level in the liquid container is low, and reminding the user to replace the ink in the container when the liquid level sensor in one of the containers detects that the ink level in the corresponding container is low.

[0011] Beneficial effects: The intelligent ink joint supply system provided by the utility model can ensure the stability of ink supply during the replacement of empty containers by setting up multiple containers for holding ink, and there will be no problem of ink shortage. Moreover, by setting up the control system, the ink flow rate can be automatically adjusted according to the production speed and demand, the ink supply pressure can be kept stable, and the consistency of product quality can be ensured. Since manual intervention is reduced, and the use of ink is precisely controlled, ink waste can be effectively reduced, and long-term use can significantly reduce production costs. The control system is connected to the liquid level sensor, and can monitor the ink remaining amount and system status in real time, so as to facilitate timely ink replenishment or maintenance, avoid production interruption caused by ink exhaustion, thereby reducing downtime and improving the overall efficiency and output of production operations, especially in production operations that require frequent changes in ink colors.

[0012] In an optional embodiment, the container is provided with two, namely a first container and a second container which are interconnected, the first container is a fixed container, and the second container is a replaceable container.

[0013] Beneficial effect: by setting one of the two containers to be movable and the other to be fixed, when replacing the ink, only the movable container needs to be replaced, which facilitates the replacement of the ink.

[0014] In an optional implementation, the liquid level sensor is disposed in the first container, and the bottom of the second container is higher than the bottom of the first container.

[0015] Beneficial effect: The bottom of the second container is higher than the bottom of the first container. When the liquid level sensor sends a liquid shortage signal, the remaining ink amount in the second container is lower than the ink amount in the first container, so as to ensure that the second container is in an ink-depleted state when the second container is replaced.

[0016] In an optional embodiment, a support structure is provided below the second container, and the support structure is suitable for lifting the second container;

[0017] And / or, a tray is provided below the container;

[0018] And / or, the second container is a ton barrel.

[0019] Beneficial effects: Using ton barrels (usually IBC barrels, Intermediate Bulk Containers, usually with a capacity of 1000 liters) as ink storage units can greatly reduce the frequency of ink replacement and is suitable for long-term, large-scale continuous production needs. A pallet is provided under the container, and a forklift is used to replace the container, which facilitates the replacement of the container.

[0020] In an optional embodiment, the liquid level sensing device comprises:

[0021] A low liquid level sensor connected to the control system, adapted to control the ink intelligent joint supply system to replenish ink to the liquid container when the control system detects that the liquid level is lower than a first preset value;

[0022] The high liquid level sensor is arranged higher than the low liquid level sensor, and is suitable for controlling the intelligent ink supply system to stop replenishing ink to the liquid container when detecting that the liquid level is higher than a second preset value.

[0023] Beneficial effect: The liquid level sensor device detects whether the liquid container is short of ink and whether the amount of ink in the liquid container exceeds an upper limit, so as to ensure that the liquid level in the liquid container is always within a set range and to ensure stable ink pressure.

[0024] In an optional embodiment, the liquid level sensing device also includes: an ultra-low liquid level sensor, which is set lower than the low liquid level sensor, the ultra-low liquid level sensor is connected to the control system, and is suitable for sending ultra-low liquid level information when the low liquid level sensor fails, and the control system controls the ink intelligent supply system to replenish ink to the liquid container; and / or an ultra-high liquid level sensor, which is set higher than the high liquid level sensor, the ultra-high liquid level sensor is connected to the control system, and is suitable for sending ultra-high liquid level information when the high liquid level sensor fails, and the control system controls the ink intelligent supply system to stop replenishing ink to the liquid container.

[0025] Beneficial effect: By adding an ultra-high liquid level sensor and / or an ultra-low liquid level sensor, when the high liquid level sensor and / or the low liquid level sensor fails, it can still ensure that the ink intelligent joint supply system is correctly triggered to start or stop ink supply. At the same time, it can also remind the operator that the high liquid level sensor and / or the low liquid level sensor has failed and needs maintenance as soon as possible, thereby ensuring that the ink intelligent joint supply system operates stably to the greatest extent and ensuring stable ink supply.

[0026] In an optional implementation, the intelligent ink supply system includes: a pressure detection device, which is arranged on the connecting pipeline, and the pressure detection device is connected to the control system.

[0027] Beneficial effect: The control system adjusts the operation of the pump according to the pressure detection device, further ensuring the stability of the hydraulic pressure, thereby ensuring the consistency of product quality.

[0028] In an optional embodiment, the ink intelligent joint supply system includes:

[0029] A reminder device is connected to the control system, and the reminder device is suitable for issuing a reminder message in at least one of the following situations: the pressure detection device detects abnormal pressure, the liquid level sensor detects low liquid level, and the liquid level sensing device detects low liquid level.

[0030] Beneficial effects: By setting up a reminder device, the operator can be reminded of the working status of the ink intelligent integrated supply system, and the ink replacement operation can be performed when the ink needs to be replaced, thereby improving work efficiency. When an error occurs in the ink intelligent integrated supply system, the fault source can be located in the first time, thereby improving the operating efficiency of the ink intelligent integrated supply system.

[0031] In an optional implementation, the control system includes a PLC main control unit.

[0032] Beneficial effects: The PLC main control unit can be well adapted to the production equipment control system and other related systems to form a complete set of production control systems, and can be better connected with the Internet of Things system to improve the intelligence level of the factory.

[0033] In the second aspect, the utility model also provides a printing system, comprising the intelligent ink supply system described in any one of the above-mentioned embodiments, a plurality of the production equipment, wherein the production equipment is a printing device, the liquid container of the printing device is an ink cartridge, and a valve is provided on the connecting pipeline, and the valve is arranged close to the printing device; the valve is an electric control valve and / or a manual valve, and the electric control valve is arranged one-to-one with the printing device, and the electric control valve is connected to the control system, and is suitable for opening and closing the connecting pipeline corresponding to the printing device.

[0034] Beneficial effect: By using a set of the ink intelligent joint supply system to supply ink to multiple printing devices, the ink is centrally stored in the ink intelligent joint supply system, and is uniformly managed and scheduled. The ink supply of the ink intelligent joint supply system is stable, which reduces the occurrence of equipment downtime due to ink shortage, improves production efficiency and reduces production costs. At the same time, since the ink supply pressure of the ink intelligent joint supply system is more stable, the printing quality can also be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a schematic diagram of an embodiment of the utility model.

[0037] Figure 2 For this utility model Figure 1 A partial enlarged schematic diagram of part A.

[0038] Description of reference numerals:

[0039] 1. Container; 101. Breathing valve; 102. Pallet; 103. Pallet; 104. Container valve; 105. Liquid level sensor; 2. PLC main control unit; 201. Signal line; 202. Information acquisition module; 203. Liquid level sensing device; 2031. Ultra-high liquid level sensor; 2032. High liquid level sensor; 2033. Low liquid level sensor; 2034. Ultra-low liquid level sensor; 204. Reminder device; 3. Connecting pipeline; 301. Pump; 302. Electric control valve; 303. Tee; 304. Pressure gauge; 305. Check valve; 306. Filter device; 4. Liquid container. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0041] Combine the following Figure 1 to Figure 2 , describing an embodiment of the utility model.

[0042] According to an embodiment of the present utility model, on the one hand, an intelligent ink supply system is provided, which is suitable for supplying ink to a liquid container 4 of a production device, such as Figure 1 As shown, a liquid level sensor 203 is provided in the liquid container 4, and the intelligent ink supply system includes: two containers 1, the container 1 is used to contain ink, and a liquid level sensor 105 is provided in one of the containers 1; a connecting pipeline 3, one end of which is connected to the two containers 1, and the other end is suitable for connecting to the liquid container 4; a pump 301 is provided on the connecting pipeline 3; a control system, which is connected to the liquid level sensor 105, the liquid level sensor 203 and the pump 301, and is suitable for controlling the pump 301 to drive the ink to flow into the liquid container 4 when the liquid level sensor 203 detects that the ink level in the liquid container 4 is low, and reminds the user to replace the ink in the other container 1 when the liquid level sensor 105 detects that the ink level in the corresponding container 1 is low, and controls at least one of the other containers 1 to supply ink to the liquid container 4.

[0043] like Figure 1As shown, the control system also includes a PLC main control unit 2, an information acquisition module 202 and a signal line 201 for communication within the control system. The PLC main control unit 2 is used to process received signals and send control signals. The information acquisition module 202 is connected to the liquid level sensor device and the electric control valve 302 and the information acquisition module 202, and then connected to the PLC main control unit 2. The information acquisition module 202 is used to pre-process the liquid level information of the liquid level sensor device 203 and the control information and status information of the electric control valve 302 to reduce the pressure of the PLC main control unit 2. In other embodiments, the information acquisition module 202 may not be set. As a convertible embodiment, the PLC main control unit 2 can be a WIFI main control unit, an RS485 main control unit, etc. Furthermore, the control system can also include a wireless module to achieve wireless connection between devices. In addition, the control system can also be connected to a remote service end to achieve a wireless management control system.

[0044] The intelligent ink joint supply system provided by the utility model can ensure the stability of ink supply during the process of replacing one of the empty containers 1 by setting two containers 1 for containing ink, and there will be no problem of liquid interruption. Moreover, by setting a control system, the ink flow rate can be automatically adjusted according to the production speed and demand, the ink supply pressure can be kept stable, and the consistency of product quality can be ensured. Since manual intervention is reduced, and the use of ink is precisely controlled, ink waste can be effectively reduced, and long-term use can significantly reduce production costs. The control system is connected to the liquid level sensor 105, and can monitor the ink remaining amount and system status in real time, so as to facilitate timely replenishment of ink or maintenance, avoid production interruption caused by ink exhaustion, thereby reducing downtime and improving the overall efficiency and output of production operations, especially in production operations that require frequent changes in ink types.

[0045] In this embodiment, Figure 2 As shown, the liquid level sensor device 203 includes: a low liquid level sensor 2033, connected to the control system, adapted to control the pump 301 and / or the electric control valve 302 to open when the liquid level is detected to be lower than a first preset value, and the control system controls the ink intelligent joint supply system to replenish ink to the liquid container 4; a high liquid level sensor 2032, connected to the control system, set higher than the low liquid level sensor 2033, adapted to control the pump 301 and / or the electric control valve 302 to close when the liquid level is detected to be higher than a second preset value, and the control system controls the ink intelligent joint supply system to stop replenishing ink to the liquid container 4. The liquid level sensor device 203 detects whether the liquid container is short of ink and whether the amount of ink in the liquid container exceeds the upper limit, so as to ensure that the liquid level in the liquid container is always within the set range and the ink pressure is stable.

[0046] In this embodiment, Figure 2As shown, the liquid level sensing device 203 also includes: an ultra-low liquid level sensor 2034, which is set lower than the low liquid level sensor 2033, and the ultra-low liquid level sensor 2034 is connected to the control system, and is suitable for sending ultra-low liquid level information when the low liquid level sensor 2033 fails, and the control system controls the ink intelligent supply system to replenish ink to the liquid container 4; and an ultra-high liquid level sensor 2031, which is set higher than the high liquid level sensor 2032, and the ultra-high liquid level sensor 2031 is connected to the control system, and is suitable for sending ultra-high liquid level information when the high liquid level sensor 2032 fails, and the control system controls the ink intelligent supply system to stop replenishing ink to the liquid container 4. By adding the ultra-high liquid level sensor 2031 and the ultra-low liquid level sensor 2034, when the high liquid level sensor 2032 and / or the low liquid level sensor 2033 fail, the ink intelligent joint supply system can still be correctly triggered to start or stop ink supply. At the same time, the operator can be reminded that the high liquid level sensor 2032 and / or the low liquid level sensor 2033 has failed and needs to be maintained as soon as possible, thereby ensuring that the ink intelligent joint supply system operates stably to the greatest extent and ensures stable ink supply. Of course, in other embodiments, the ultra-low liquid level sensor 2034 and / or the ultra-high liquid level sensor 2031 may not be provided.

[0047] like Figure 1 As shown, in this embodiment, there are two containers 1, namely a first container and a second container which are interconnected, the first container is a fixed container, and the second container is a replaceable container. By setting one of the two containers 1 to be movable and the other to be fixed, when replacing ink, only the replaceable container 1 needs to be replaced, which facilitates the replacement of ink, while allowing the other container 1 to maintain the ink supply state.

[0048] Of course, in other embodiments, three, four, five or more containers 1 may be provided according to actual needs, and more containers 1 may buffer more ink to ensure that there is no supply interruption during the process of replacing empty containers 1. Furthermore, a liquid level sensor 105 may be provided in each container 1 and connected to a control system to better monitor the ink inventory.

[0049] The pump 301 in this embodiment is used to drive the ink, and specifically may be a peristaltic pump, a diaphragm pump, a gear pump, etc.

[0050] Specifically, in this embodiment, a liquid level sensor 105 is provided in the first container, and the liquid level sensor 105 is set at the liquid level of the ink required for 30 minutes of production reserved in the first container. The reserved ink volume can be flexibly adjusted according to actual production needs, which is only an example and is not further limited.

[0051] like Figure 1As shown, both containers 1 are provided with container valves 104. When one of the containers 1 is replaced, the container valve 104 on the corresponding container 1 can be closed to prevent ink from leaking out.

[0052] In this embodiment, the container 1 is provided with a breathing valve 101, a liquid level sensor 105 is provided in the first container, and a support structure is provided below the second container. Specifically, the support structure is a card plate 103, and the support structure is suitable for raising the second container so that the bottom of the second container is higher than the bottom of the first container. Since the bottom of the second container is higher than the bottom of the first container, when the liquid level sensor 105 sends an ink shortage signal, the remaining ink amount in the second container is lower than the ink amount in the first container, so as to ensure that the second container is in an ink exhaustion state when the second container is replaced.

[0053] In this embodiment, the capacity of the first container is slightly larger than that of the second container, so as to ensure that when the ink in the second container is exhausted, there is still some ink in the first container for printing. Specifically, the capacity of the first container is slightly larger than that of the second container by 10%. This ratio can be flexibly adjusted according to actual needs. The above ratio is only used as an example and is not further limited.

[0054] As a convertible embodiment, an ink replenishing device can also be provided. When an empty replaceable container is replaced with a full replaceable container, the ink replenishing device can inject the ink in the replaceable container into other less than full containers 1, thereby optimizing the replacement operation of the container 1.

[0055] In this embodiment, a pallet 102 is provided below the container 1, so a forklift can be used to replace the container 1, which is convenient for replacing the container 1. As a convertible embodiment, a metal base is provided at the bottom of the container 1, and the container 1 is surrounded and protected by a metal fence.

[0056] In this embodiment, the container 1 is a ton barrel. Using a ton barrel (usually referred to as an IBC barrel, Intermediate Bulk Container, with a capacity of usually 1000 liters) as an ink storage unit can greatly reduce the frequency of ink replacement and is suitable for long-term, large-volume continuous production needs. As a convertible implementation, the container 1 can also be other large-capacity ink storage devices.

[0057] In this embodiment, the intelligent ink joint supply system includes: a pressure detection device, which is arranged on the connecting pipe 3 and is connected to the control system; a reminder device 204, which is connected to the control system, and the reminder device 204 is suitable for sending reminder information when the following situations occur: the pressure detection device detects abnormal pressure, the liquid level sensor 105 detects low liquid level, and the liquid level sensor 203 detects low liquid level and / or high liquid level. Specifically, the reminder device 204 can be an audible and visual alarm. As a convertible implementation, it can also be that the reminder device 204 only sends reminder information when one, two or three of the above situations occur.

[0058] The control system adjusts the operation of the pump 301 according to the pressure detection device to further ensure the stability of the ink supply pressure to ensure the consistency of product quality. By setting the reminder device 204, the operator can be reminded of the working status of the ink intelligent joint supply system, and the ink replacement operation can be performed when the ink needs to be replaced, thereby improving work efficiency. When an error occurs in the ink intelligent joint supply system, the source of the fault can be located in the first time, thereby improving the operating efficiency of the ink intelligent joint supply system. In other embodiments, the pressure detection device or the reminder device 204 may not be provided. In other embodiments, the reminder device 204 may also be only a sound alarm or a light alarm, or other reminder devices.

[0059] In this embodiment, the intelligent ink supply system further includes: a filter device 306, which is arranged on the connecting pipeline 3; and / or a one-way valve 305, which is arranged on the connecting pipeline 3. By setting the filter device 306, on the one hand, it is possible to prevent impurities from clogging the connecting pipeline 3, and on the other hand, it is possible to prevent impurities from affecting the product quality; by setting the one-way valve 305, it is possible to further ensure the stability of the ink pressure. In other embodiments, the filter device 306 or the one-way valve 305 may not be provided. The filter device 306 includes an 800-mesh stainless steel mesh filter element for filtering impurities. Different filter devices 306 may also be used according to actual needs, and no excessive restrictions are made here.

[0060] On the other hand, the utility model also provides a printing system, including the above-mentioned intelligent ink supply system, wherein the production equipment is a printing device, and multiple printing devices are provided. The liquid container 4 is an ink cartridge, and a valve is provided on the connecting pipeline 3. The valve is arranged close to the printer. The valve includes an electrically controlled valve 302 and a manual valve. In this embodiment, the electrically controlled valve 302 is a solenoid valve. The solenoid valve and the manual valve are arranged one by one with the printing equipment. The solenoid valve is connected to the control system and is suitable for opening and closing the connecting pipeline 3 corresponding to the printing equipment.

[0061] By switching the manual valve, you can switch whether the ink supply of the printer cartridge is automatically controlled. By using a set of intelligent ink supply system to supply ink to multiple printing devices, the ink is centrally stored in the intelligent ink supply system, and is managed and dispatched in a unified manner. The intelligent ink supply system has a stable ink supply, which reduces the occurrence of downtime due to lack of ink in the equipment, improves production efficiency, and reduces production costs. At the same time, because the ink supply pressure of the intelligent ink supply system is more stable, it can also improve printing quality.

[0062] In an optional embodiment, the solenoid valve may be other valves controlled by signals, such as a pneumatic valve, an electric ball valve, etc. As a convertible embodiment, the manual valve may not be provided.

[0063] In this embodiment, the PLC main control unit 2 can control at least 20 printing devices to automatically supply ink at the same time, and can also be changed to manual mode ink supply, and each printing device includes at least 6 ink cartridges. Through the PLC main control unit 2, the centralized supply of ink in ultra-large-scale printing production operations can be met, the efficiency of printing production operations can be improved, and the printing quality can be improved.

[0064] Specific working principle: When the PLC main control unit 2 receives a low liquid level signal from the low liquid level sensor 2033 in the liquid container 4, the pump 301 is switched to the working state, and the electromagnetic valve corresponding to the ink cartridge is controlled to open, and the ink in the ink cartridge is replenished until the high liquid level sensor 2032 in the ink cartridge sends a high liquid level signal, and then the electromagnetic valve corresponding to the ink cartridge is closed. When the amount of ink in all ink cartridges is within the preset range, the pump 301 is switched to the stop state. When the liquid level sensor 105 detects that the liquid level in the container 1 is low, the reminder device 204 sends a reminder to replace the movable container. When replacing the empty movable container, the container valve 104 is closed, the interface of the connecting pipe at the empty movable container is disconnected, and the empty movable container is removed together with the pallet 103 by a forklift. After the full movable container is placed in place, the interface of the connecting pipe is connected, and the container valve 104 is opened to complete the replacement of the movable container.

[0065] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An intelligent ink joint supply system, suitable for supplying ink to a liquid container (4) of a production device, wherein a liquid level sensor device (203) is provided in the liquid container, characterized in that: The ink intelligent joint supply system comprises: At least two containers (1), the containers (1) are interconnected and used to contain ink, and at least one of the containers (1) is provided with a liquid level sensor (105); A connecting pipeline (3), one end of which is connected to the at least two containers (1) and the other end of which is suitable for connecting to the liquid container (4); A pump (301) is arranged on the connecting pipeline (3); A control system is connected to the liquid level sensor (105), the liquid level sensing device (203) and the pump (301), and is suitable for controlling the pump (301) to drive the ink to flow into the liquid container (4) when the liquid level sensing device (203) detects that the ink level in the liquid container (4) is low, and reminding the user to replace the ink in the container (1) when the liquid level sensor (105) in one of the containers (1) detects that the ink level in its corresponding container (1) is low.

2. The intelligent ink supply system according to claim 1, characterized in that: The container (1) is provided with two, namely a first container and a second container which are interconnected, the first container being a fixed container and the second container being a replaceable container.

3. The intelligent ink supply system according to claim 2, characterized in that: The liquid level sensor (105) is arranged in the first container, and the bottom of the second container is higher than the bottom of the first container.

4. The intelligent ink supply system according to claim 3, characterized in that: A support structure is provided below the second container, and the support structure is suitable for lifting the second container; And / or, a tray (102) is provided below the container (1); And / or, the container (1) is a ton barrel.

5. The intelligent ink supply system according to claim 1, characterized in that: The liquid level sensing device (203) comprises: A low liquid level sensor (2033) connected to the control system, adapted to control the intelligent ink supply system to replenish ink to the liquid container (4) when the control system detects that the liquid level is lower than a first preset value; A high liquid level sensor (2032) is arranged higher than the low liquid level sensor (2033), and the high liquid level sensor (2032) is connected to the control system, and is suitable for the control system to control the ink intelligent joint supply system to stop replenishing ink to the liquid container (4) when detecting that the liquid level is higher than a second preset value.

6. The intelligent ink supply system according to claim 5, characterized in that: The liquid level sensing device (203) further comprises: an ultra-low liquid level sensor (2034) arranged lower than the low liquid level sensor (2033), the ultra-low liquid level sensor (2034) being connected to the control system and adapted to send ultra-low liquid level information when the low liquid level sensor (2033) fails, the control system controlling the ink intelligent joint supply system to replenish ink to the liquid container (4); And / or, an ultra-high liquid level sensor (2031) is arranged higher than the high liquid level sensor (2032), and the ultra-high liquid level sensor (2031) is connected to the control system and is suitable for sending ultra-high liquid level information when the high liquid level sensor (2032) fails, and the control system controls the ink intelligent joint supply system to stop replenishing ink to the liquid container (4).

7. The intelligent ink joint supply system according to any one of claims 1 to 6, characterized in that: The intelligent ink joint supply system comprises: a pressure detection device, which is arranged on the connecting pipeline (3); the pressure detection device is connected to the control system.

8. The intelligent ink supply system according to claim 7, characterized in that: The ink intelligent joint supply system comprises: A reminder device is connected to the control system, and the reminder device is suitable for issuing a reminder message in at least one of the following situations: the pressure detection device detects abnormal pressure, the liquid level sensor (105) detects a low liquid level, and the liquid level sensing device (203) detects a low liquid level and / or a high liquid level.

9. The intelligent ink joint supply system according to any one of claims 1 to 6, characterized in that: The control system comprises a PLC main control unit (2).

10. A printing system, characterized in that: include: The intelligent ink supply system according to any one of claims 1 to 9; A plurality of the production devices, wherein the production devices are printing devices, the liquid container of the printing devices is an ink cartridge, and a valve is provided on the connecting pipeline (3), and the valve is arranged close to the printing device; The valve is an electric control valve (302) and / or a manual valve. The electric control valve (302) is arranged in a one-to-one correspondence with the printing device. The electric control valve (302) is connected to the control system and is suitable for opening and closing the connecting pipeline (3) corresponding to the printing device.

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