Negative pressure supplementing system and ink path system

Abstract

The utility model is suitable for the field of digital printing, and provides a negative pressure supplementing system and an ink path system. The negative pressure supplementing system comprises an ink box, a negative pressure box, an air storage tank, a first fluid control valve and a negative pressure air storage tank, the negative pressure box is communicated with the ink box and the air storage tank, the first fluid control valve is communicated with the air storage tank and the negative pressure air storage tank, and the negative pressure air storage tank is used for providing negative pressure. The first fluid control valve is used for opening or closing an air path between the negative pressure air storage tank and the air storage tank. The negative pressure supplementing system provided by the utility model can supplement the required negative pressure in a short time, and prevents the ink dripping phenomenon of the spray head of the ink box from influencing the printing effect.

Description

Technical Field

[0001] The utility model belongs to the field of digital printing, and in particular relates to a negative pressure supplement system and an ink path system. Background Art

[0002] When digital printing equipment is working, the ink in the ink cartridge needs a certain negative pressure to lock the ink to prevent the ink from dripping from the bottom of the nozzle. The existing negative pressure replenishment method usually uses a vacuum pump to generate negative pressure, and the vacuum pump is affected by the volume, speed and voltage used. The speed of the vacuum pump that meets the volume requirements is limited, so it takes a long time to replenish the negative pressure. When the ink cartridge is larger, the negative pressure capacity required is greater, and the negative pressure replenishment time of the vacuum pump will be too long, resulting in untimely negative pressure replenishment and ink dripping from the nozzle under the ink cartridge. Utility Model Content

[0003] The negative pressure replenishing system provided by the utility model aims to solve the problem in the prior art that the negative pressure replenishing time is too long and thus the ink dripping from the nozzle is caused.

[0004] The utility model is implemented as follows: a negative pressure replenishing system comprises an ink cartridge, a negative pressure box, an air storage tank, a first fluid control valve and a negative pressure air storage tank, wherein the negative pressure box is connected to the ink cartridge and the air storage tank, the first fluid control valve is connected to the air storage tank and the negative pressure air storage tank, the negative pressure air storage tank is used to provide negative pressure, and the first fluid control valve is used to open or close the air path between the negative pressure air storage tank and the air storage tank.

[0005] Furthermore, the system also includes a pressure sensor, which is arranged on the gas storage tank and detects the current pressure in the gas storage tank. When the current pressure is less than a preset pressure, the first fluid control valve opens.

[0006] Furthermore, the system also includes a second fluid control valve provided on the gas storage tank, and the second fluid control valve is used to relieve pressure on the gas storage tank.

[0007] Further, when the current pressure is equal to the preset pressure, the first fluid control valve is closed; when the current pressure is greater than the preset pressure, the second fluid control valve is opened; and when the current pressure is equal to the preset pressure, the second fluid control valve is closed.

[0008] Furthermore, the gas storage tank is also provided with a flow limiting valve, and the second fluid control valve is connected between the gas storage tank and the flow limiting valve.

[0009] Furthermore, the first fluid control valve and the second fluid control valve are both two-way valves.

[0010] Furthermore, the negative pressure value of the negative pressure gas storage tank is (-70KPA) to (-80KPA).

[0011] The utility model also provides an ink path system, comprising the aforementioned negative pressure supplement system.

[0012] The beneficial effect achieved by the utility model is that since the ink cartridge, the negative pressure box and the gas storage tank are connected, therefore, by connecting the negative pressure gas storage tank with the gas storage tank and arranging a first fluid control valve between the gas storage tank and the negative pressure gas storage tank, when the ink cartridge needs to be refilled, the opening of the first fluid control valve allows the required negative pressure to be quickly formed at the ink cartridge, and can easily avoid ink dripping from the nozzle due to untimely replenishment of the negative pressure in the ink cartridge, and under the condition of the same volume, the capacity of the first fluid control valve greatly exceeds the flow rate of the vacuum pump, which can greatly reduce the negative pressure replenishment time, and compared with the vacuum pump, the cost of the negative pressure gas storage tank and the first fluid control valve is also lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a negative pressure supplement system provided by the utility model.

[0014] Description of Figure Numbers:

[0015] 1. Ink cartridge; 2. Negative pressure box; 3. Air storage tank; 4. First fluid control valve; 5. Negative pressure air storage tank; 6. Pressure sensor; 7. Second fluid control valve; 8. Flow limiting valve. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0017] See also Figure 1 The embodiment of the utility model provides a negative pressure replenishing system, including an ink cartridge 1, a negative pressure cartridge 2, an air storage tank 3, a first fluid control valve 4 and a negative pressure air storage tank 5, wherein the negative pressure cartridge 2 is connected to the ink cartridge 1 and the air storage tank 3, and the negative pressure cartridge 2 is used to prevent the ink in the ink cartridge 1 from flowing back, so as to prevent the ink from further flowing back into the air storage tank 3. In actual production, a liquid level monitoring component is provided in the negative pressure cartridge 2, such as a liquid level sensor, which can send out an alarm feedback according to the liquid level feedback information when the ink in the negative pressure cartridge 2 is filled to a set capacity, thereby relieving the pressure on the ink path, and the first fluid control valve 4 is connected to the air storage tank 3 and the negative pressure air storage tank 5, and the negative pressure air storage tank 5 is used to provide negative pressure, and the first fluid control valve 4 is used to open or close the air path between the negative pressure air storage tank 5 and the air storage tank 3.

[0018] Since the ink cartridge 1, the negative pressure box 2 and the air tank 3 are connected, the negative pressure air tank 5 is connected to the air tank 3, and a first fluid control valve 4 is set between the air tank 3 and the negative pressure air tank 5. When the ink cartridge 1 needs to be replenished, the opening of the first fluid control valve 4 allows the required negative pressure to be quickly formed at the ink cartridge 1, which can easily avoid ink dripping from the nozzle due to untimely replenishment of the negative pressure in the ink cartridge 1. Under the same volume, the capacity of the first fluid control valve 4 greatly exceeds the flow rate of the vacuum pump, which can greatly reduce the negative pressure replenishment time. In addition, compared with the vacuum pump, the cost of the negative pressure air tank 5 and the first fluid control valve 4 is also lower.

[0019] The negative pressure replenishing system provided by the embodiment of the utility model can replenish the required negative pressure in a short time, thereby preventing the nozzle of the ink cartridge 1 from dripping ink, thereby affecting the printing effect.

[0020] In this embodiment, the first fluid control valve 4 can be a two-way valve. The flow rate of the two-way valve of the same volume is more than 6 times the flow rate of the vacuum pump, which can meet the demand for rapid replenishment of negative pressure.

[0021] Furthermore, the system further includes a pressure sensor 6, which is disposed on the gas storage tank 3 and detects the current pressure in the gas storage tank 3. When the current pressure is less than the preset pressure, the first fluid control valve 4 is opened, and when the current pressure is equal to the preset pressure, the first fluid control valve 4 is closed. The pressure sensor 6 is provided to detect the air pressure in the gas storage tank 3 in real time, so as to control the first fluid control valve 4 to open or close the air path between the negative pressure gas storage tank 5 and the gas storage tank 3 according to the current pressure of the gas storage tank 3, so as to be able to automatically adjust the pressure value of the ink cartridge 1 in real time.

[0022] Furthermore, the system further includes a second fluid control valve 7 provided on the gas storage tank 3, and the second fluid control valve 7 is used to relieve the pressure of the gas storage tank 3. In this way, the second fluid control valve 7 is provided so that when the pressure of the gas storage tank 3 exceeds the preset pressure, the second fluid control valve 7 can be opened to relieve the pressure of the gas storage tank 3, thereby preventing the ink nozzle of the ink cartridge 1 from being cut off due to excessive negative pressure.

[0023] In this embodiment, the second fluid control valve 7 can be a two-way valve.

[0024] Furthermore, when the current pressure is equal to the preset pressure, the first fluid control valve 4 is closed; when the current pressure is greater than the preset pressure, the second fluid control valve 7 is opened, and when the current pressure is equal to the preset pressure, the second fluid control valve 7 is closed. The pressure sensor 6 is used to detect in real time whether the pressure value of the gas storage tank 3 is greater than the preset pressure, so that the second fluid control valve 7 can be controlled to open in time to release the pressure of the gas storage tank 3, thereby avoiding the ink shortage phenomenon of the nozzle of the ink cartridge 1 and ensuring the continuous printing operation.

[0025] Furthermore, a flow limiting valve 8 is provided on the gas storage tank 3, and the second fluid control valve 7 is connected between the gas storage tank 3 and the flow limiting valve 8. When the gas storage tank 3 is depressurized, the gas in the gas storage tank 3 is discharged through the flow limiting valve 8 after the second fluid control valve 7 is opened, which can effectively control the flow rate and ensure that the gas pressure of the gas storage tank 3 drops slowly, thereby avoiding a sudden drop in the pressure of the gas storage tank 3 and affecting the unstable ink supply, thereby affecting the printing effect.

[0026] In this embodiment, the negative pressure gas storage tank 5 can adopt an automatic negative pressure gas storage tank. The automatic negative pressure gas storage tank has its own pressure adjustment function and is a stable gas source. The negative pressure value of the negative pressure gas storage tank 5 can be selected from -70KPA to -80KPA, which can ensure that the production needs of negative pressure supplementation are met.

[0027] The embodiment of the utility model further provides an ink circuit system, including the aforementioned negative pressure supplement system. The ink circuit system of the utility model can supplement the required negative pressure in a short time, avoiding the phenomenon of ink dripping from the nozzle of the ink cartridge 1, thereby affecting the printing effect.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A negative pressure supplement system, characterized in that: It includes an ink cartridge, a negative pressure box, an air tank, a first fluid control valve and a negative pressure air tank, wherein the negative pressure box connects the ink cartridge and the air tank, the first fluid control valve connects the air tank and the negative pressure air tank, the negative pressure air tank is used to provide negative pressure, and the first fluid control valve is used to open or close the air path between the negative pressure air tank and the air tank.

2. The negative pressure supplement system according to claim 1, characterized in that: The system further includes a pressure sensor, which is disposed on the gas storage tank and detects a current pressure in the gas storage tank. When the current pressure is less than a preset pressure, the first fluid control valve opens.

3. The negative pressure supplement system according to claim 2, characterized in that: The system further comprises a second fluid control valve disposed on the gas storage tank, wherein the second fluid control valve is used for relieving pressure from the gas storage tank.

4. The negative pressure supplement system according to claim 3, characterized in that: When the current pressure is equal to the preset pressure, the first fluid control valve is closed; when the current pressure is greater than the preset pressure, the second fluid control valve is opened; and when the current pressure is equal to the preset pressure, the second fluid control valve is closed.

5. The negative pressure supplement system according to claim 3, characterized in that: The gas storage tank is also provided with a flow limiting valve, and the second fluid control valve is connected between the gas storage tank and the flow limiting valve.

6. The negative pressure supplement system according to claim 3, characterized in that: The first fluid control valve and the second fluid control valve are both two-way valves.

7. The negative pressure supplement system according to claim 1, characterized in that: The negative pressure value of the negative pressure gas storage tank is (-70KPA) to (-80KPA).

8. An ink path system, characterized in that: Comprising the negative pressure supplement system as described in any one of claims 1-7.

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