CN215904155U - Ink system of industrial printer - Google Patents

Abstract

The utility model relates to the field of industrial printers, in particular to an ink system of an industrial printer, which comprises: the ink jet head comprises an ink jet head and an ink circulation branch connected with the ink jet head, wherein the ink circulation branch comprises: the ink containing cavity is communicated with the ink gun through a liquid supply channel; one end of the ink guide cavity is communicated with the ink gun, and the other end of the ink guide cavity is communicated with the liquid supply channel; the liquid return channel is connected with the ink accommodating cavity and the ink guide cavity; the ink system further includes: the pressure control assembly is respectively connected with the ink guide cavity and the ink containing cavity; and the maintenance ink receiving tray is arranged below the ink jet head. The problem of blockage caused by blockage of a driving component such as a liquid pump is eliminated by the circulating flow of the ink without directly contacting the driving component; the low flow rate accurate adjustment is realized; the pressure control assembly enables the ink containing cavity and the ink guide cavity to be consistent with the ambient normal pressure, ink in the ink gun can automatically flow out to realize quick cleaning and waste ink discharging of the ink gun, and the maintenance difficulty is reduced.

Description

Ink system of industrial printer

Technical Field

The present invention relates to the field of industrial printers, and more particularly, to an ink system for an industrial printer.

Background

The industrial printer is a non-contact ink-jet digital printing device, and can print color patterns on the surfaces of various plane materials. The printing machine has wide applicability, and can be used for quickly printing patterns on metal, ceramics, crystal, glass, acrylic, PVC, plastics, toys, leather, USB flash disks, cloth, wood, silica gel, rice paper and the like. With the continuous development of printing structures and ink, more and more media can be directly printed through an industrial printer, and images are more and more beautiful in color and vivid in effect and have more functions, such as water resistance, sun protection, strong wear-resistant adhesive force, fastness, strong stereoscopic impression and the like. The improvement of printing precision and the fineness of images are always the key directions for the development of industrial printers.

The quality of printing precision and image promotes the technological promotion that can't leave printing the shower nozzle, in order to reach better effect and careful image, and the printing shower nozzle on the printer is more and more, and the size is also more and more littleer, and further in order to save space, convenient control, a large amount of shower nozzles are integrated in a printing module. With such a design, although the quality of the image is improved, maintenance of the print head becomes increasingly difficult. In a traditional ink supply system of the nozzle, ink is statically waited in the nozzle before ink is jetted, and once the static time is too long, the ink is easy to dry and deteriorate and precipitate, so that the quality of the ink is seriously influenced, and the nozzle is easily blocked. . Especially, the problem that the nozzle with small ink dots is blocked easily exists, the failure rate is improved due to the integration of a large number of nozzles, the whole service life is shortened, and the maintenance time is long each time.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome at least one defect of the prior art and provides an ink system of an industrial printer, which is used for solving the problems of printing nozzle blockage caused by easy precipitation of ink, large number of printing nozzles, large integration and complex maintenance.

The technical scheme adopted by the utility model is that an ink system of an industrial printer comprises: the ink jet head comprises an ink jet head and an ink circulation branch connected with the ink jet head, wherein the ink circulation branch comprises: the ink containing cavity is communicated with the ink gun through a liquid supply channel; one end of the ink guide cavity is communicated with the ink gun, and the other end of the ink guide cavity is communicated with the liquid supply channel; the liquid return channel is connected with the ink accommodating cavity and the ink guide cavity; the ink system further includes: the pressure control assembly is respectively connected with the ink guide cavity and the ink containing cavity; and the maintenance ink receiving tray is arranged below the ink jet head.

In the technical scheme, the ink gun is used for spraying ink; the ink circulation branch is used for enabling the ink in the ink gun to circularly flow, and the ink gun is prevented from being blocked due to ink solidification or the ink is prevented from precipitating due to long-time standing to influence the effect of the ink; the ink containing cavity is used for storing ink; the liquid supply channel is used for guiding the ink in the ink accommodating cavity into the ink gun; the ink guide cavity is used for providing power for ink flowing in the ink circulation branch; the liquid return channel is used for limiting the flow direction of the ink and forming the orderly and circular flow of the ink; the pressure control assembly is used for controlling the change of air pressure formed in the ink guide cavity, so that the ink guide cavity has power for guiding ink to flow; the maintenance ink receiving tray is used for receiving the flowing ink when the ink gun is cleaned.

The ink guide cavity forms air pressure difference under the action of the pressure control assembly, the air pressure difference drives ink to enter the ink guide cavity from the ink cavity through the ink supply channel after passing through the ink gun, and then the ink enters the ink guide cavity through the guide of the liquid return channel to form unidirectional circulation of the ink, and in the ink circulation branch, the ink does not need to directly contact with the driving assembly in circulation flow, so that the problem of blockage caused by blockage of the driving assembly such as a liquid pump is solved, and the faults are reduced; secondly, the low flow rate can be accurately adjusted by controlling the pressure in the ink circulation branch, so that the flow rate is matched with the characteristics of the ink, the problems of ink sedimentation or layering and the like are reduced, the blockage is improved, the speed of ink quality reduction is slowed down, and the faults are reduced; and thirdly, a non-pressure state can be further formed through the pressure control assembly, namely, the ink containing cavity and the ink guide cavity are consistent with the ambient normal pressure, and under the action of the matching gravity, the ink in the ink gun can automatically flow out to the accumulated ink to be completely emptied, so that the quick cleaning and waste ink discharging of the ink gun are realized, the maintenance time is saved, and the maintenance difficulty is reduced.

Preferably, a liquid level detector is arranged in the ink containing cavity and/or the ink guide cavity. In the technical scheme, the liquid level detector is used for automatically controlling the liquid level height of the ink in the ink containing cavity and the ink guide cavity, the system can identify and control the use condition of the ink in the ink containing cavity and the ink guide cavity by automatically controlling the liquid level of the ink, and the alarm is timely provided, or the automatic ink adding is controlled, or the pressure of the ink guide cavity is adjusted to realize the ink quantity distribution between the ink containing cavity and the ink guide cavity.

Preferably, the liquid supply channel and/or the liquid return channel are/is provided with a temperature control device. In this technical scheme, temperature control device is used for adjusting the temperature of ink, makes the ink remain throughout under suitable service temperature, avoids external environment to cause the ink temperature to hang down or too high to promote the effect and the image quality of printing.

Preferably, a filtering device is further arranged in the ink accommodating cavity, and the liquid return channel is communicated with the inside of the ink accommodating cavity through the filtering device. In the technical scheme, the filtering device is used for filtering precipitates and impurities in ink, so that the quality of the ink entering the ink gun is guaranteed, the blockage of the ink gun is reduced, and the faults are reduced.

Preferably, the ink box is further included and is communicated with the ink guide cavity through the ink replenishing channel. In the technical scheme, the ink box is used for supplementing the total flowing ink amount of the ink circulation branch, and the ink in the ink box can be supplemented into the ink guide cavity through the ink supplementing channel.

Preferably, a connector is arranged at the joint of the ink replenishing channel and the ink box, the connector comprises a connecting driving assembly and a contact detection device, and the connector is connected with the liquid level detector. In the technical scheme, the connector is used for controlling the connection and disconnection of the ink box and the ink supplementing channel, the connection driving assembly is used for driving the ink supplementing channel to be connected with the ink box and controlling the connection and the closing of the ink supplementing channel and the ink guide cavity, the contact detection device is used for detecting the position between the ink box and the ink supplementing channel, and the automatic ink supplementing can be realized through the connector.

Preferably, the ink cartridge is located above the ink containing chamber, and the ink guide chamber is located below the ink containing chamber. In this technical scheme, the position of ink horn is injectd and is made the speed that the ink can utilize the effect of gravity to promote the benefit black, and holds the injectment of ink chamber position and help making the ink flow through the ink gun, and the process that gets into this section route of leading the ink chamber is under the effect of gravity more smooth, even negative pressure fails suddenly, this section circulation still can keep a period of buffering time under the effect of gravity.

Preferably, the ink containing cavity is provided with a first ink containing area and a space area positioned above the first ink containing area, and the liquid supply channel and the liquid return channel are communicated with the first ink containing area. In the technical scheme, the first ink containing area is used for storing ink, and the empty area is an air area; in order to avoid air entering the liquid-circulating duct and to maintain a continuous supply of ink during circulation, the liquid supply duct and the liquid return channel need to be in communication with the first ink containing zone.

Preferably, the ink guide cavity is provided with a second ink containing area and a pressure regulating area positioned above the second ink containing area; the pressure control assembly is communicated with the pressure regulating section; the liquid return channel is communicated with the second ink containing area. In the technical scheme, the second ink containing area is used for storing ink, the pressure regulating area is an air area and used for regulating the pressure in the ink guide cavity, and the pressure control assembly is used for regulating the flow rate of the ink circulating branch by controlling the gas in the air area to form different pressures; in order to avoid the ink from entering the pressure control assembly, the pressure control assembly needs to be communicated with the air area and far away from the second ink containing area, and the communicating openings of the circulating liquid return channel and the ink guide cavity need to be arranged in the second ink containing area to ensure that the circulating liquid return channel and the liquid return channel are covered by the ink.

Preferably, the pressure control assembly comprises a normal pressure channel and a negative pressure channel, the normal pressure channel is connected with the ink containing cavity, and the negative pressure channel is connected with the ink guide cavity. In the technical scheme, the normal pressure channel is used for applying gas to the ink containing cavity, so that the ink containing cavity is in a normal pressure state, the speed of ink entering the ink gun is accelerated, and in the ink discharging and cleaning process of the ink gun, the negative pressure in the ink circulation branch is eliminated through the normal pressure channel, so that the automatic ink discharging and cleaning of the ink gun are realized; the negative pressure channel is used for extracting gas in the ink guide cavity to enable the ink guide cavity to be in a negative pressure state, and when the ink guide cavity normally runs, the negative pressure channel guides ink to circulate.

Preferably, the pressure control assembly comprises: a telescopic air bag provided with an air suction port; the counterweight component is arranged on the telescopic air bag; and the pressure channel is used for connecting the telescopic air bag and the ink circulation branch. In the technical scheme, the telescopic air bag forms negative pressure by extracting air and is used for providing a power pressure source for ink circulation; the counterweight component is used for stretching the telescopic air bag to enable the suction force at the air suction port to be consistent with the gravity of the counterweight component; and the pressure channel is used for connecting the air suction port with the ink circulation branch. The telescopic air bag is high in overall sealing performance and can adjust the suction force through self expansion and contraction. Under the cooperation of the counterweight assembly, the gravity action of the counterweight assembly can be utilized to simply and effectively generate suction equal to the weight of the counterweight assembly, the stability of external continuous operation equipment is not required, and the pressure control is accurate. The suction at the suction inlet can be automatically adjusted, and the automatic stabilization and automatic adjustment of pressure can be realized by utilizing the self structure through self automatic extension adjustment.

Preferably, the pressure control assembly further comprises an air bag adjusting device, and the air bag adjusting device is movably connected with the telescopic air bag. In the technical scheme, the air bag adjusting device is used for compressing the telescopic air bag or eliminating the gravity of the counterweight component. On one hand, the air bag adjusting device can quickly compress the telescopic air bag to enable the telescopic air bag to reversibly output positive pressure to equipment required by negative pressure or quickly eliminate the negative pressure through compression deformation; on the other hand, the air bag adjusting device can eliminate the gravity of the counterweight component and slowly reduce the negative pressure suction force, thereby effectively controlling the negative pressure suction force output by the pressure control component.

Preferably, the airbag adjusting apparatus includes: the pushing component is arranged below the counterweight component, and the driving device drives the pushing component to move up and down. In the technical scheme, the pushing assembly is used for jacking the telescopic air bag and the counterweight assembly, so that the telescopic air bag is compressed or the gravity of the counterweight assembly is offset. The driving device is used for stably and accurately controlling the movement of the assembly, so that the stroke and the speed of the pushing assembly are controllable; the push assembly is beneficial to simply and effectively controlling the telescopic air bag, and is positioned on the same path of deformation of the telescopic air bag, so that the stress of the telescopic air bag is uniform, and the problems of deformation, bending and the like of the telescopic air bag in the compression process are reduced.

Preferably, the pushing assembly comprises a horizontal supporting platform and a transmission assembly, and the transmission assembly comprises a rack connected with the lower surface of the horizontal supporting platform and a gear arranged on the driving device and matched with the rack. In the technical scheme, the horizontal supporting platform is used for supporting and jacking the counterweight component and the telescopic air bag; the transmission assembly is used for converting the power of the driving device into the gravity of the lifting horizontal supporting platform. The horizontal supporting platform is beneficial to further improving the problem of uneven force application in the compression process of the counterweight component and the telescopic air bag; the combination of the gear and the rack is beneficial to reducing the overall length of the pushing assembly, the matching accuracy of the gear and the rack is high, and the accuracy and the precision of stroke control are improved.

Preferably, the pressure control assembly further comprises a pressure regulating assembly, and the pressure regulating assembly comprises: the pressure equalizing distribution cavity is connected with the pressure channel and is provided with at least one negative pressure channel communicated with the inside; the normal pressure air inlet is communicated with the external normal pressure environment; the pressure regulating channel is connected with the normal-pressure air inlet and the pressure-equalizing distribution cavity; and the normal pressure channel is connected with the normal pressure air inlet. In the technical scheme, the pressure equalizing distribution cavity is used for simultaneously forming negative pressure for a plurality of devices required by negative pressure and maintaining the pressure among the devices required by the negative pressure to be equal. The negative pressure channel is used for being connected with equipment required by negative pressure; the normal pressure channel supplements normal pressure air through a normal pressure air inlet. Through the pressure regulating subassembly has formed a multi-functional equipment that can supply atmospheric pressure gas outward, can provide many negative pressure suction passageway again to pressure control assembly's adaptability and functional have been promoted.

Preferably, the pressure regulating channel is provided with a first control valve and a one-way conduction valve, and the normal pressure channel is provided with a second control valve. In this technical scheme, first control valve is used for controlling the break-make of pressure regulating passageway, the one-way conduction valve is used for making the pressure regulating passageway form one-way conduction, prevents the backward flow, the second control valve is used for controlling the break-make of ordinary pressure passageway. Through first control valve and second control valve, can the quick adjustment pressure regulating subassembly the state to can cooperate automatic control equipment to implement automatic control, and the control of one-way conduction valve has further promoted the security and the stability of pressure regulating passageway.

Preferably, the normal pressure opening is further provided with a gas filtering device. In the technical scheme, the gas filtering device is used for filtering the gas at the normal-pressure gas inlet, so that particles, dust and fine liquid drops in the gas entering the pressure control assembly are blocked, the cleanness of a pipeline is kept, the scale deposition and blockage are avoided, and the later maintenance is reduced.

Preferably, the pressure control assembly further comprises a housing, at least the telescopic bladder and the weight assembly being disposed within the housing. In the technical scheme, the shell is used for protecting the telescopic air bag and parts connected with the telescopic air bag. The cross section of the shell is matched with the shape of the telescopic air bag, so that the movement track of the telescopic air bag can be limited, and the folding or deformation caused by the bending of the telescopic air bag when the telescopic air bag ascends is avoided.

Preferably, a position sensor for detecting the expansion degree of the expansion airbag is provided in the housing. In the technical scheme, the position sensor is used for detecting the position of the bottom of the telescopic air bag, feeding back whether the telescopic air bag is in the maximum compression state or in the maximum extension state or not, releasing an electric signal and facilitating an external alarm or a controller to acquire related information. The position sensor can further limit the moving range of the air bag adjusting device, so that accurate adjustment of pressure is realized.

Preferably, the weight assembly comprises a weight plate for adjusting the weight and a weight support for supporting the weight plate, and the weight support is connected with the telescopic air bag. In the technical scheme, the counterweight plate and the counterweight support form an easy-to-detach connection, and the pressure of the telescopic air bag can be quickly adjusted through superposition of the counterweight plate.

Compared with the prior art, the utility model has the beneficial effects that: the ink does not need to directly contact with the driving component in the circulating flow, so that the problem of blockage caused by blockage of the driving component such as a liquid pump is solved, and the faults are reduced; the low flow rate can be accurately adjusted by controlling the pressure in the ink circulation branch, so that the flow rate is matched with the characteristics of the ink, the problems of ink sedimentation or layering and the like are reduced, the blockage is improved, the speed of ink quality reduction is slowed down, and the faults are reduced; the non-pressure state can be formed through the pressure control assembly, the ink containing cavity and the ink guide cavity are consistent with the ambient normal pressure, the ink in the ink gun can automatically flow out to the accumulated ink to be completely emptied under the action of the matched gravity, the quick cleaning and the waste ink discharging of the ink gun are realized, the maintenance time is saved, and the maintenance difficulty is reduced. The gravity action of the counterweight component can be utilized to simply and effectively generate suction equal to the weight of the counterweight component, the dependence on the stability of external continuous operation equipment is not needed, and the pressure control is accurate. The suction at the suction inlet can be automatically adjusted, and the automatic stabilization and automatic adjustment of pressure can be realized by utilizing the self structure through self automatic extension adjustment.

Drawings

Fig. 1 is an overall schematic view of the present invention.

FIG. 2 is a schematic view of a pressure control assembly of the present invention.

FIG. 3 is a schematic diagram of an ink circulation branch of the present invention.

FIG. 4 is a schematic view of the inflatable bladder of the present invention.

Description of reference numerals: the ink-jet head comprises an ink containing cavity 110, a first ink containing area 111, a vacant area 112, an ink guiding cavity 120, a second ink containing area 121, a pressure regulating area 122, an ink box 130, a connector 131, a liquid level detector 101, a temperature control device 102, a filtering device 103, a liquid supply channel 201, a liquid return channel 202, a liquid supplementing channel 203, a pressure control component 300, a normal pressure channel 301, a negative pressure channel 302, a telescopic air bag 310, a pressure channel 311, a counterweight component 320, a counterweight bracket 321, a driving device 332, a horizontal supporting table 333, a rack 334, a gear 335, a pressure equalizing distribution cavity 341, a normal pressure air inlet 342, a pressure regulating channel 343, a first control valve 345, a one-way conduction valve 346, a second control valve 347, a filtering device 348 and an ink-jet head 001.

Detailed Description

The drawings are only for purposes of illustration and are not to be construed as limiting the utility model. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

As shown in fig. 1, the present embodiment is an ink system of an industrial printer, including: the ink jet head 001 and the ink circulation branch connected with the ink jet head 001, the ink circulation branch includes: the ink accommodating cavity 110 is communicated with the ink gun 001 through a liquid supply channel 201; an ink guide chamber 120, one end of which is communicated with the ink gun 001 and the other end of which is communicated with the liquid supply channel 201; a liquid return channel 202 connecting the ink containing chamber 110 and the ink guide chamber 120; the ink system further includes: a pressure control assembly 300 connected to the ink guide chamber 120 and the ink containing chamber 110, respectively; and the maintenance ink receiving tray is arranged below the ink jet head. A liquid level detector 101 is disposed in the ink containing chamber 110 and/or the ink guide chamber 120. The liquid supply channel 201 and/or the liquid return channel 202 are/is provided with a temperature control device 102. The ink containing cavity 110 is also internally provided with a filter device 103, and the liquid return channel 202 is communicated with the interior of the ink containing cavity 110 through the filter device 103.

The ink system further includes an ink cartridge 130, and the ink cartridge 130 communicates with the ink guide chamber 120 through an ink replenishing passage. The joint of the ink replenishing channel and the ink box 130 is provided with a connector 131, the connector 131 comprises a connecting driving component and a contact detection device, and the connector 131 is connected with the liquid level detector 101. As shown in FIG. 3, the ink cartridge 130 is located above the ink-containing chamber 110, and the ink-guiding chamber 120 is located below the ink-containing chamber 110. The ink containing cavity 110 is provided with a first ink containing area 111 and a space 112 above the first ink containing area 111, and a liquid supply channel 201 and a liquid return channel 202 are communicated with the first ink containing area 111. The ink guide cavity 120 is provided with a second ink containing interval 121 and a pressure regulating interval 122 positioned above the second ink containing interval 121; the pressure control assembly 300 is communicated with the pressure regulating section 122; the liquid return passage 202 communicates with the second ink containing section 121. The pressure control assembly 300 comprises a normal pressure channel 301 and a negative pressure channel 302, wherein the normal pressure channel 301 is connected with the ink containing cavity 110, and the negative pressure channel 302 is connected with the ink guide cavity 120

As shown in fig. 2, a pressure control assembly comprising: a telescopic airbag 310 provided with an inlet; a weight assembly 320 disposed on the telescopic airbag 310; and a pressure channel 311 for connecting the bellows 310 and the ink circulation branch. The pressure control assembly further comprises an air bag adjusting device which is movably connected with the telescopic air bag 310. The air bag adjusting device includes: a push assembly disposed below the weight assembly 320, and a driving means 332 for driving the push assembly to move up and down. The pushing assembly comprises a horizontal supporting platform 333 and a transmission assembly, wherein the transmission assembly comprises a rack 334 connected with the lower surface of the horizontal supporting platform 333 and a gear 335 arranged on the driving device 332 and matched with the rack 334

Pressure control subassembly still includes the pressure regulating subassembly, and the pressure regulating subassembly includes: the pressure equalizing distribution cavity 341 is connected with the pressure channel 311 and is provided with at least one negative pressure channel 302 communicated with the inside; a normal pressure air inlet 342 communicated with the external normal pressure environment; the pressure regulating channel 343 is connected with the normal pressure air inlet 342 and the pressure equalizing distribution cavity 341; the atmospheric channel 301 is connected with an atmospheric air inlet 342. The pressure regulating passage 343 is provided with a first control valve 345 and a one-way conduction valve 346, and the normal pressure passage 301 is provided with a second control valve 347. The atmospheric opening is also provided with a gas filtration unit 348. The pressure control assembly further includes a housing within which at least the bellows 310 and the weight assembly 320 are disposed. A position sensor for detecting the expansion degree of the expansion airbag 310 is provided in the housing. As shown in fig. 4, the weight assembly 320 includes a weight plate for adjusting the weight and a weight holder 321 for holding the weight plate, the weight holder 321 being connected to the bellows 310.

Example 2

This embodiment is an ink system of an industrial printer, including: the ink jet head 001 and the ink circulation branch connected with the ink jet head 001, the ink circulation branch includes: the ink accommodating cavity 110 is communicated with the ink gun 001 through a liquid supply channel 201; an ink guide chamber 120, one end of which is communicated with the ink gun 001 and the other end of which is communicated with the liquid supply channel 201; a liquid return channel 202 connecting the ink containing chamber 110 and the ink guide chamber 120; the ink system further includes: a pressure control assembly 300 connected to the ink guide chamber 120 and the ink containing chamber 110, respectively; and the maintenance ink receiving tray is arranged below the ink jet head.

The inkjet head 001 is used to eject ink; the ink circulation branch is used for enabling the ink in the ink gun 001 to flow circularly, so that the ink gun 001 is prevented from being blocked due to ink solidification, or the ink is prevented from being settled for a long time to influence the ink effect; the ink containing chamber 110 is used for storing ink; the liquid supply channel 201 is used for guiding the ink in the ink containing cavity 110 into the ink gun 001; the ink guide cavity 120 is used for providing the power for the ink flowing in the ink circulation branch; the liquid return channel 202 is used for limiting the flow direction of the ink and forming the orderly circulation flow of the ink; the pressure control assembly 300 is used to control the change of air pressure in the ink guide chamber 120, so that the ink guide chamber 120 has power for guiding ink flow.

Specifically, the industrial printer is provided with a printing module, and the printing module is internally provided with a plurality of ink-jet heads 001; each different ink has an independent ink circulation branch, a plurality of ink circulation branches form a monochrome main branch in the printing module, and the monochrome main branch is communicated with each ink gun 001 to form a small circulation in the ink gun 001. The ink containing cavity 110 and the ink guide cavity 120 are sealed containers; the liquid supply channel 201 is connected with the bottom of the ink containing cavity 110, the liquid return channel 202 is connected with the bottom of the ink guide cavity 120, the ink gun 001 is connected with the ink guide cavity 120 through a return channel, and the return channel, the liquid supply channel 201 and the liquid return pipeline can be hard pipes or hoses. One end of the return channel is connected to the inkjet head 001, and the other end enters the ink guide chamber 120 and extends to a position of the ink guide chamber 120 near the bottom to form an opening, which is communicated with the lower part in the ink guide chamber 120.

A liquid level detector 101 is disposed in the ink containing chamber 110 and/or the ink guide chamber 120. The liquid level detector 101 is used for automatically controlling the liquid level heights of the inks in the ink containing cavity 110 and the ink guide cavity 120, so that the system can identify and control the use conditions of the inks in the ink containing cavity 110 and the ink guide cavity 120 by automatically controlling the liquid levels of the inks, and timely give an alarm or control the automatic ink supplement or adjust the pressure of the ink guide cavity 120 to realize the ink amount distribution between the ink containing cavity 110 and the ink guide cavity 120. Specifically, the liquid level detector 101 can be connected to the pressure control assembly 300 to provide a reference for pressure control; meanwhile, the detector can be further connected with a control center of the system to provide signals for controlling the supplement or triggering of the ink.

The liquid supply channel 201 and/or the liquid return channel 202 are/is provided with a temperature control device 102. The temperature control device 102 is used for adjusting the temperature of the ink, and specifically, the temperature control device 102 on the liquid supply channel 201 is a heat preservation device and is mainly used for maintaining the temperature of the ink entering the ink gun 001; the temperature control device 102 on the liquid return channel 202 is a temperature raising device for controlling the temperature of the ink circulation branch.

The ink containing cavity 110 is also internally provided with a filter device 103, and the liquid return channel 202 is communicated with the interior of the ink containing cavity 110 through the filter device 103. The filter device 103 is used for filtering sediment and impurities in the ink, and specifically, the filter device 103 can be a hollow cavity made of a filter material and having an opening at the lower part.

The ink system further includes an ink cartridge 130, and the ink cartridge 130 communicates with the ink guide chamber 120 through an ink replenishing passage. The ink box 130 is used for supplementing the total amount of ink flowing in the ink circulation branch, and the ink in the ink box 130 can be supplemented into the ink guide cavity 120 through the ink supplementing channel. Specifically, the ink cartridge 130 is detachably connected to the ink replenishment path, and the ink can be quickly replenished by quickly replacing the ink cartridge 130.

The joint of the ink replenishing channel and the ink box 130 is provided with a connector 131, the connector 131 comprises a connecting driving component and a contact detection device, and the connector 131 is connected with the liquid level detector 101. The connector 131 is used for controlling the on-off of the ink box 130 and the ink supplementing channel, the connection driving assembly is used for driving the ink supplementing channel to be connected with the ink box 130 and controlling the communication and the closing between the ink supplementing channel and the ink guide cavity 120, the contact detection device is used for detecting the position between the ink box 130 and the ink supplementing channel, and the automatic ink supplementing can be achieved through the connector 131. Specifically, the contact detection device is a contact switch, the connection driving assembly comprises a motor, a supply valve and an interface, the interface is communicated with the inside of the ink box 130, the contact detection device can be matched with a contact on the ink box 130, and the supply valve controls the switch of the ink replenishing channel.

The ink cartridge 130 is located above the ink containing chamber 110, and the ink guiding chamber 120 is located below the ink containing chamber 110. The position of the ink cartridge 130 is defined to increase the speed of replenishing ink by gravity, and the position of the ink containing chamber 110 is defined to help the ink flowing through the ink jet head 001 to enter the ink guide chamber 120 in a path which is smoother by gravity, and specifically, the ink circulation branch and the pressure control assembly 300 are disposed on the same mounting bracket.

The ink containing cavity 110 is provided with a first ink containing area 111 and a space 112 above the first ink containing area 111, and a liquid supply channel 201 and a liquid return channel 202 are communicated with the first ink containing area 111. The first ink containing section 111 is used for storing ink, and the empty section 112 is an air zone; specifically, the first ink containing section 111 and the empty section 112 are divided and controlled by the liquid level detector 101. The communication ports of the liquid return channel 202 and the liquid supply channel 201 with the ink containing chamber 110 need to be kept below the liquid level of the ink continuously.

The ink guide cavity 120 is provided with a second ink containing interval 121 and a pressure regulating interval 122 positioned above the second ink containing interval 121; the pressure control assembly 300 is communicated with the pressure regulating section 122; the liquid return passage 202 communicates with the second ink containing section 121. The second ink containing area 121 is used for storing ink, the pressure regulating area 122 is an air area and is used for regulating the pressure in the ink guide cavity 120, and the pressure control assembly 300 forms different pressures by controlling the air in the air area, so as to regulate the flow rate of the ink circulation branch; specifically, the second ink containing section 121 and the pressure regulating section 122 are divided and controlled by the liquid level detector 101 in the ink guide chamber 120. The return channel, the fluid infusion channel 203 and the communication ports of the return channel and the ink guide cavity 120 are all required to be arranged below the liquid level.

The pressure control assembly 300 includes a normal pressure passage 301 and a negative pressure passage 302, the normal pressure passage 301 is connected to the ink containing chamber 110, and the negative pressure passage 302 is connected to the ink guide chamber 120. The normal pressure channel 301 is used for applying gas to the ink containing cavity 110, so that the ink containing cavity 110 is in a normal pressure state, the speed of ink entering the ink gun 001 is accelerated, and in the ink discharging and cleaning process of the ink gun 001, the negative pressure in the ink circulation branch is eliminated through the normal pressure channel 301, so that the ink gun 001 can automatically discharge waste ink and clean; the negative pressure channel 302 is used for pumping the air in the ink guide cavity 120 to make the ink guide cavity 120 in a negative pressure state, and when the ink guide cavity operates normally, the negative pressure channel 302 guides the ink to circulate. Specifically, the negative pressure is formed in the ink guide cavity 120 by pumping the air in the ink guide cavity 120, and since the one-way liquid return channel 202 is arranged between the ink guide cavity 120 and the ink containing cavity 110, the negative pressure in the ink guide cavity 120 can only act on the return channel, and under the action of gravity and the negative pressure, the ink in the ink containing cavity 110 enters the ink guide cavity 120 through the ink jet head 001 and the return channel via the liquid supply channel 201, and since the ink in the ink containing cavity 110 is reduced and the ink containing cavity 110 is a sealed container, the ink reduction causes a certain negative pressure to be generated in the ink containing cavity 110, and since the pressure for pumping the ink through the liquid return channel 202 is smaller than the pressure for pumping the ink from the liquid supply channel 201, the ink containing cavity 110 can pump the ink from the ink guide cavity 120 through the liquid return channel 202, thereby realizing circulation.

A pressure control assembly comprising: a telescopic airbag 310 provided with an inlet; a weight assembly 320 disposed on the telescopic airbag 310; and a pressure channel 311 for connecting the bellows 310 and the ink circulation branch. The telescopic air bag 310 forms negative pressure by pumping air and is used for providing a power pressure source for ink circulation; the weight assembly 320 is used for stretching the telescopic air bag 310, so that the suction force at the suction port is consistent with the gravity of the weight assembly 320; and a pressure channel 311 for connecting the suction port and the ink circulation branch. Specifically, the air bag 310 is integrally formed, the suction port is upward after the air bag is fixed, the air bag 310 is extended downward, the inner space is enlarged to suck air by extending downward, and the air in the equipment required for negative pressure is extracted through the pressure passage 311, so that negative pressure is formed in the equipment required for negative pressure. The counterweight assembly 320 is arranged at the bottom of the telescopic air bag 310, and the counterweight assembly 320 is consistent with the gas pressure generated by the required suction force, so that the suction force can be conveniently adjusted according to the pressure of the counterweight assembly 320. The pressure channel 311 is a gas duct, one end of which is connected with the suction port in a sealing manner, and the other end of which is connected with a device required for negative pressure.

The pressure control assembly further comprises an air bag adjusting device which is movably connected with the telescopic air bag 310. The air bag adjusting means is used to compress the telescopic air bag 310 or to remove the weight of the weight assembly 320. Specifically, when the airbag adjusting device is idle, the telescopic airbag 310 maintains a certain interval, so that the counterweight assembly 320 has a larger free stretching range, and the airbag adjusting device is connected with the telescopic airbag 310 only when the telescopic airbag 310 needs to be adjusted; alternatively, the air bag adjustment device may be permanently connected to the inflatable air bag 310, but the air bag adjustment device may be powered only when it is desired to adjust the inflatable air bag 310, the latter having the benefit of being able to monitor the condition of the inflatable air bag 310 via the air bag adjustment device.

The air bag adjusting device includes: a push assembly disposed below the weight assembly 320, and a driving means 332 for driving the push assembly to move up and down. The pushing assembly is used to jack up the bellows 310 and the weight assembly 320 such that the bellows 310 is compressed or the weight of the weight assembly 320 is counteracted. The drive means 332 is used to control the movement of the assembly with stability and accuracy so that the stroke and speed of the pushing assembly can be controlled. Specifically, the cross section of the telescopic airbag 310 is circular, the cross section of the counterweight component 320 is circular, and the center of the cross section of the counterweight component 320, the center of the cross section of the telescopic airbag 310 and the center of the contact surface of the pushing component and the counterweight component 320 are located on the same vertical line. When the pushing assembly rises to the highest point, the telescopic air bag 310 is in the maximum compression state; when the pushing assembly is lowered to the lowest point, a sufficient gap is still remained between the pushing assembly and the weight assembly 320 in the longest state of the telescopic assembly, and the driving device 332 can be a stepping motor.

The pushing assembly includes a horizontal support platform 333 and a transmission assembly including a rack 334 connected to a lower surface of the horizontal support platform 333 and a gear 335 provided on the driving device 332 and engaged with the rack 334. The horizontal supporting platform 333 is used for supporting and jacking the counterweight component 320 and the telescopic air bag 310; the transmission assembly is used for converting the power of the driving device 332 into the gravity of the lifting horizontal supporting platform 333. Specifically, the cross section of the horizontal supporting platform 333 is circular, and the center of the cross section is located on the same vertical line as the center of the cross section of the counterweight assembly 320. The rack 334 is vertically arranged below the horizontal bearing platform 333, the center of the cross section of the rack 334 and the center of the lower surface of the horizontal bearing platform 333 are located on the same vertical line, the upper surface of the rack 334 is connected with the lower surface of the horizontal bearing platform 333, the stepping motor is arranged on one side of the rack 334, the gear 335 is arranged on the rotating shaft of the stepping motor, and the gear 335 is matched with the rack 334.

Pressure control subassembly still includes the pressure regulating subassembly, and the pressure regulating subassembly includes: the pressure equalizing distribution cavity 341 is connected with the pressure channel 311 and is provided with at least one negative pressure channel 302 communicated with the inside; a normal pressure air inlet 342 communicated with the external normal pressure environment; the pressure regulating channel 343 is connected with the normal pressure air inlet 342 and the pressure equalizing distribution cavity 341; the atmospheric channel 301 is connected with an atmospheric air inlet 342. The pressure equalizing and distributing chamber 341 is used to simultaneously generate negative pressure for a plurality of devices required for negative pressure and can maintain the pressure between the devices required for negative pressure to be equal. The negative pressure channel 302 is used to connect to the equipment required for negative pressure. Specifically, the pressure-equalizing distribution cavity is a sealed box, one end of a pressure channel 311 formed by air pipes is communicated with the air suction port, the other end of the pressure channel 311 is communicated with the pressure-equalizing distribution cavity, and then the pressure channel 302 formed by a plurality of air pipes is connected to a plurality of ink circulation branches, the communication port of the pressure channel 302 in the pressure-equalizing distribution cavity is consistent, and the distance between the communication port of the pressure channel 302 in the pressure-equalizing distribution cavity and the communication port of the pressure channel 311 in the pressure-equalizing distribution cavity is consistent, so that the pressure-equalizing distribution cavity is helpful for transmitting negative pressure suction more quickly and uniformly. Because the negative pressure channels 302 are communicated, the negative pressure suction is uniformly distributed and can be changed continuously according to the specific change of each negative pressure suction pipeline, and the negative pressure suction of each negative pressure channel 302 is kept consistent.

The pressure regulating passage 343 is provided with a first control valve 345 and a one-way conduction valve 346, and the normal pressure passage 301 is provided with a second control valve 347. The first control valve 345 is used for controlling the on-off of the pressure regulating channel 343, the one-way conduction valve 346 is used for enabling the pressure regulating channel 343 to form one-way conduction to prevent backflow, and the second control valve 347 is used for controlling the on-off of the normal pressure channel 301. Specifically, on the pressure regulating channel 343, the distance between the first control valve 345 and the normal pressure air inlet 342 is smaller than the distance between the one-way conduction valve 346 and the normal pressure air inlet 342, so that the problem that gas cannot enter the normal pressure air inlet 342 from the pressure equalizing distribution chamber 341 after the first control valve 345 is opened is solved. The one-way conduction valve 346 allows access only from the end of the one-way conduction valve 346 remote from the pressure equalizing distribution chamber 341, through the one-way conduction valve 346, and to the pressure equalizing distribution chamber 341.

The atmospheric opening is also provided with a gas filtration unit 348. The gas filtering device 348 is used to filter the gas from the atmospheric gas inlet 342. Specifically, the gas filtering device 348 covers the end of the atmospheric inlet facing the atmospheric environment, and the gas entering the atmospheric inlet 342 enters the pressure-regulating channel 343 or the atmospheric channel 301 after being filtered by the gas filtering device 348. The gas filtering device 348 can be a porous filtering device 348 and is removably connected to the atmospheric air port.

The pressure control assembly further includes a housing within which at least the bellows 310 and the weight assembly 320 are disposed. The housing serves to protect the bellows 310 and the components connected thereto. Specifically, the housing is made of rigid material, the inner surface is smooth, and a small gap is left between the telescopic airbag 310 and the inner wall of the housing. The cross-section of the housing is a symmetrical polygon, and the upper portion of the housing is provided with holes for fixing and allowing the pressure passage 311 to pass through. A viewing port is provided on one side of the housing to allow viewing of the bellows 310 and the weight assembly 320. The bottom is provided with an opening through which the air bag adjustment device acts on the weight assembly 320 and the telescopic air bag 310.

A position sensor for detecting the expansion degree of the expansion airbag 310 is provided in the housing. The position sensor is used for detecting the position of the bottom of the telescopic air bag 310, feeding back whether the telescopic air bag 310 is in the maximum compression state or the maximum extension state, releasing an electric signal, and facilitating an external alarm or a controller to acquire related information. Specifically, the position sensors include an upper limit position sensor, a lower limit position sensor, and a rest position sensor. Three position sensors can detect the position of the bottom of the bellows 310. The upper limit position sensor and the lower limit position sensor are connected with the air bag adjusting device. The rest position sensor is used to detect the current position of the bottom of the bellows 310.

The weight assembly 320 includes a weight plate for adjusting the weight and a weight support 321 for supporting the weight plate, the weight support 321 being connected to the bellows 310. The weight plate and the weight support 321 form an easy-to-detach connection, and the pressure on the telescopic air bag 310 can be quickly adjusted through superposition of the weight plate. Specifically, the weight support 321 includes a connecting rod and a supporting plate, one end of the connecting rod is vertically connected with the supporting plate, the other end of the connecting rod is connected with the lower portion of the telescopic airbag 310, the section of the weight plate is circular, one end of the weight plate is provided with an assembling port, and the assembling port extends to the middle portion from the edge of the weight plate. The mass of different weight plates can be the same or different.

Example 3

This embodiment is an ink system of an industrial printer, including: the ink jet head 001 and the ink circulation branch connected with the ink jet head 001, the ink circulation branch includes: the ink accommodating cavity 110 is communicated with the ink gun 001 through a liquid supply channel 201; an ink guide chamber 120, one end of which is communicated with the ink gun 001 and the other end of which is communicated with the liquid supply channel 201; a liquid return channel 202 connecting the ink containing chamber 110 and the ink guide chamber 120; the ink system further includes: a pressure control assembly 300 connected to the ink guide chamber 120 and the ink containing chamber 110, respectively; and the maintenance ink receiving tray is arranged below the ink jet head. The inkjet head 001 is used to eject ink; the ink circulation branch is used for enabling the ink in the ink gun 001 to flow circularly, so that the ink gun 001 is prevented from being blocked due to ink solidification, or the ink is prevented from being settled for a long time to influence the ink effect; the ink containing chamber 110 is used for storing ink; the liquid supply channel 201 is used for guiding the ink in the ink containing cavity 110 into the ink gun 001; the ink guide cavity 120 is used for providing the power for the ink flowing in the ink circulation branch; the liquid return channel 202 is used for limiting the flow direction of the ink and forming the orderly circulation flow of the ink; the pressure control assembly 300 is used to control the change of air pressure in the ink guide chamber 120, so that the ink guide chamber 120 has power for guiding ink flow.

In this embodiment, an industrial printer has six ink-jet heads 001 in a module, three ink circulation branches, and three monochrome main branches in the printing module. The three single-color main branches respectively form a small circulation with each ink-jet head 001, so that the ink circularly flows in the ink-jet head 001. The bottoms of the ink containing cavity 110 and the ink guide cavity 120 are provided with horizontal planes, the liquid supply channel 201 is communicated with the ink containing cavity 110 through the horizontal planes, and the liquid return channel 202 is connected with the ink guide cavity 120 through the horizontal planes. The backflow channel, the liquid supply channel 201 and the liquid return channel 202 are all PVC hoses, the liquid return channel 202 is provided with a one-way valve, the liquid return channel 202 in each ink circulation branch is provided with an independent one-way valve, and the one-way valve only allows ink to enter the ink containing cavity 110 from the ink guide cavity 120 and prevents the ink in the ink containing cavity 110 from flowing back to the ink guide cavity 120.

When the ink jet head is used, in the operation process of the industrial printer, ink continuously flows in the ink circulation branch and flows through the ink jet head 001, and the ink jet head 001 ejects the flowing ink through the structure of the ink jet head 001 to print. When the printer performs printing operation, the ink in the ink accommodating cavity 110 at least covers one end of the liquid supply channel 201, the ink in the ink guide cavity 120 at least covers one end of the liquid return channel 202, one end of the liquid return channel in the ink guide cavity 120 is positioned below the liquid level, a certain air space is reserved in the ink guide cavity 120, and the pressure control assembly 300 is communicated with the air space; the pressure control assembly 300 forms a negative pressure in the ink guiding chamber 120, and the ink returns to the ink containing chamber 110 after passing through the ink containing chamber 110, the liquid supply channel 201, the backflow channel, the ink guiding chamber 120 and the liquid returning channel 202. When used for purging, the pressure control assembly 300 makes the pressure in the ink guide chamber 120 coincide with the normal pressure, and the ink introduced into the inkjet head 001 naturally flows out through the inkjet head 001 due to the lack of the pumping force of the negative pressure, thereby achieving rapid maintenance of the inkjet head 001.

A liquid level detector 101 is disposed in the ink containing chamber 110 and/or the ink guide chamber 120. The liquid level detector 101 is used for automatically controlling the liquid level height of the ink in the ink containing cavity 110 and the ink guide cavity 120; in this embodiment, the ink containing cavity 110 and the ink guiding cavity 120 are both provided with a liquid level detector 101. When the ink level detector is used, the position of the liquid level detector 101 is set to be located between the first ink containing area 111 and the first pressure regulating area 122, when the liquid level of ink drops to a certain position, the liquid level detector 101 triggers the control valve to be communicated, so that the ink in the ink box 130 enters the ink guide cavity 120 through the liquid supplementing channel 203, and meanwhile, the negative pressure in the ink guide cavity 120 is properly regulated to adjust the pressure change caused by ink supplementation.

The liquid supply channel 201 and/or the liquid return channel 202 are/is provided with a temperature control device 102. The temperature control device 102 is used for adjusting the temperature of the ink in the embodiment, a constant temperature heating device is arranged on the liquid supply channel 201; the liquid return channel 202 is provided with a heater, and the heater is matched with a cooling fan. In the using process, the heater heats the ink through the feedback of the temperature detection points arranged at a plurality of positions, and the heated ink is reduced in temperature by the original ink in the ink accommodating cavity 110 after entering the ink accommodating cavity 110, so that the liquid supply channel 201 needs to be further adjusted in temperature through the constant temperature heating device again, and the ink entering the ink gun 001 is ensured to reach the designated temperature.

The ink containing cavity 110 is also internally provided with a filter device 103, and the liquid return channel 202 is communicated with the interior of the ink containing cavity 110 through the filter device 103. The filtering device 103 is used for filtering precipitates and impurities in the ink; in this embodiment, the filter device 103 is a one-way conductive material, the lower opening of the filter device is communicated with the bottom surface of the ink containing cavity 110, and the liquid return channel 202 is communicated with the ink containing cavity 110 through the filter device 103 in one way. When the ink tank is used, after ink is heated, part of precipitates caused by low temperature are dissolved and enter the ink accommodating cavity 110 through the filtering device 103, so that the influence caused by temperature is eliminated, and the filtering and separation of real precipitates and useless impurities are realized.

The ink system further comprises an ink box 130, and the ink box 130 is communicated with the ink guide cavity 120 through an ink replenishing channel. The ink cartridge 130 is used to supplement the total amount of ink flowing in the ink circulation branch; in this embodiment, the ink replenishing channel is a PVC pipe, and extends to the bottom of the ink guiding chamber 120 after entering the ink guiding chamber 120, and the opening of the PVC pipe is located below the liquid level of the ink. In the using process, when the liquid level detector 101 drops to a set point, the ink replenishing channel is communicated with the ink box 130 and the ink guide cavity 120, under the action of negative pressure, ink in the ink box 130 quickly enters the ink guide cavity 120 until the liquid level detector 101 rises to a specified point, then the ink replenishing channel is closed, and the ink replenishing is completed.

The joint of the ink replenishing channel and the ink box 130 is provided with a connector 131, the connector 131 comprises a connecting driving component and a contact detection device, and the connector 131 is connected with the liquid level detector 101. The connector 131 is used for controlling the on-off of the ink box 130 and the ink replenishing channel, the connection driving component is used for driving the ink replenishing channel to be connected with the ink box 130 and controlling the communication and the closing of the ink replenishing channel and the ink guide cavity 120, and the contact detection device is used for detecting the position between the ink box 130 and the ink replenishing channel; in this embodiment, the ink cartridge 130 is inserted into the connector 131 in the lateral direction. When the ink replenishing device is used, the ink box 130 is installed at a preset position, when ink replenishing is needed, the motor drives the ink replenishing channel to be connected with the ink box 130, after the detection device detects that the ink box 130 is connected with the contact, the ink replenishing channel is completely connected with the ink replenishing channel, and the ink replenishing channel is opened.

The ink cartridge 130 is located above the ink containing chamber 110, and the ink guiding chamber 120 is located below the ink containing chamber 110. The position of the ink cartridge 130 defines the speed at which the ink can be replenished by the action of gravity. In this embodiment, the ink cartridges 130, the ink accommodating chambers 110, and the ink guiding chambers 120 are vertically arranged from top to bottom, six ink circulation branches are transversely and regularly arranged, and a heat sink for dissipating heat of the temperature control device 102 is disposed on the back side.

The ink containing cavity 110 is provided with a first ink containing area 111 and a space 112 above the first ink containing area 111, and a liquid supply channel 201 and a liquid return channel 202 are communicated with the first ink containing area 111. The first ink containing section 111 is used for storing ink, and the empty section 112 is an air zone; in this embodiment, the communication ports of the liquid return channel 202, the liquid supply channel 201 and the ink containing cavity 110 are located at the bottom of the ink containing cavity 110.

The ink guide cavity 120 is provided with a second ink containing interval 121 and a pressure regulating interval 122 positioned above the second ink containing interval 121; the pressure control assembly 300 is communicated with the pressure regulating section 122; the liquid return passage 202 communicates with the second ink containing section 121. The second ink containing area 121 is used for storing ink, the pressure regulating area 122 is an air area and is used for regulating the pressure in the ink guide cavity 120, and the pressure control assembly 300 forms different pressures by controlling the air in the air area, so as to regulate the flow rate of the ink circulation branch; in this embodiment, the return channel and the fluid infusion channel 203 enter from the upper part of the ink guide cavity 120 in the form of a pipeline, extend into the ink containing cavity 110 and keep below the liquid level, and have downward openings; the communicating port of the backflow channel and the ink guide cavity 120 is positioned at the bottom of the ink guide cavity 120; the opening of the pressure control assembly 300 communicating with the ink guide chamber 120 is located at the upper portion of the ink guide chamber 120.

The pressure control assembly 300 includes a normal pressure passage 301 and a negative pressure passage 302, the normal pressure passage 301 is connected to the ink containing chamber 110, and the negative pressure passage 302 is connected to the ink guide chamber 120. The normal pressure channel 301 is used for applying gas to the ink containing cavity 110 to enable the ink containing cavity 110 to be in a normal pressure state, and the negative pressure channel 302 is used for extracting the gas in the ink guide cavity 120 to enable the ink guide cavity 120 to be in a negative pressure state; in this embodiment, when the inkjet head 001 discharges ink and is cleaned, the normal pressure channel 301 is connected to the ink accommodating chamber 110, so that the negative pressure in the ink accommodating chamber 110 is eliminated, the ink circulating through the inkjet head 001 loses power and flows out along the inkjet head 001 under the action of gravity, and when the normal pressure channel 301 is closed again, the ink guide chamber 120 generates a negative pressure again, and the ink continues to circulate.

A pressure control assembly comprising: a telescopic airbag 310 provided with an inlet; a weight assembly 320 disposed on the telescopic airbag 310; and a pressure channel 311 for connecting the bellows 310 and the ink circulation branch. The telescopic air bag 310 forms negative pressure by pumping air and is used for providing a power pressure source for ink circulation; the weight assembly 320 is used for stretching the telescopic air bag 310, so that the suction force at the suction port is consistent with the gravity of the weight assembly 320; and a pressure channel 311 for connecting the suction port and the ink circulation branch. When the negative pressure suction type air bag is used, redundant air is discharged through the compression telescopic air bag 310, then the air bag is connected into equipment required by negative pressure through a pressure pipeline, and the counterweight component 320 is installed at the lower part of the telescopic air bag 310 according to the required negative pressure suction force, so that the gravity is consistent with the required negative pressure suction force. The weight assembly 320 stretches the telescopic air bag 310 downwards until the suction force generated at the suction port of the telescopic air bag 310 is consistent with the gravity, when the negative pressure suction force of the equipment required by negative pressure is reduced due to various reasons, the suction force of the suction port is reduced, and the telescopic air bag 310 is automatically stretched again by the weight assembly 320 under the action of the gravity of the weight assembly 320 until the suction force at the suction port is restored to be consistent with the gravity.

The pressure control assembly further comprises an air bag adjusting device which is movably connected with the telescopic air bag 310. The air bag adjusting means is used to compress the telescopic air bag 310 or to remove the weight of the weight assembly 320. When in use, before the negative pressure suction is initially applied, the air bag adjusting device compresses the telescopic air bag 310 until the air in the telescopic air bag 310 is exhausted, the air suction port is connected to equipment required by the negative pressure through the pressure channel 311, and then the air pressure adjusting device keeps a gap with the telescopic air bag 310 and the counterweight component 320; in order to reduce the negative pressure suction force, the gravity action of the counterweight component 320 is counteracted through the air bag adjusting device, the negative pressure suction force begins to be reduced, and the negative pressure suction force is continuously reduced along with the compression of the telescopic air bag 310; the suction port is disconnected with the pressure channel 311, the telescopic air bag 310 extends to a certain position under the action of the counterweight component 320 and is connected with the suction port and the pressure channel 311 again, or before the telescopic air bag 310 is connected with the pressure channel 311, the telescopic air bag 310 is compressed by the air bag adjusting device under a certain stretching state, and positive pressure is output to the connecting equipment.

The air bag adjusting device includes: a push assembly disposed below the weight assembly 320, and a driving means 332 for driving the push assembly to move up and down. The pushing assembly is used to jack up the bellows 310 and the weight assembly 320 such that the bellows 310 is compressed or the weight of the weight assembly 320 is counteracted. The driving device 332 is used for stably and accurately controlling the movement of the assembly, so that the stroke and the speed of the pushing assembly are controllable; when the lifting type air bag compression device is used, the pushing assembly ascends under the driving of the driving device 332, the self weight of the counterweight assembly 320 is eliminated in a jacking mode, the telescopic air bag 310 is gradually compressed along with the jacking of the horizontal supporting table 333, and the negative pressure suction force is gradually reduced.

The pushing assembly includes a horizontal support platform 333 and a transmission assembly including a rack 334 connected to a lower surface of the horizontal support platform 333 and a gear 335 provided on the driving device 332 and engaged with the rack 334. The horizontal supporting platform 333 is used for supporting and jacking the counterweight component 320 and the telescopic air bag 310; the transmission assembly is used for converting the power of the driving device 332 into the gravity of the lifting horizontal supporting platform 333. When the lifting type air bag lifting mechanism is used, the stepping motor rotates anticlockwise to drive the rack 334 to lift, the rack 334 drives the horizontal supporting table 333 to lift, and the horizontal supporting table 333 is consistent with the gravity centers of the telescopic air bag 310 and the counterweight component 320, so that the telescopic air bag 310 is folded according to the lines of the telescopic air bag 310 in the lifting process, and is not easy to bend, deform or fold in a staggered mode.

Pressure control subassembly still includes the pressure regulating subassembly, and the pressure regulating subassembly includes: the pressure equalizing distribution cavity 341 is connected with the pressure channel 311 and is provided with at least one negative pressure channel 302 communicated with the inside; a normal pressure air inlet 342 communicated with the external normal pressure environment; the pressure regulating channel 343 is connected with the normal pressure air inlet 342 and the pressure equalizing distribution cavity 341; the atmospheric channel 301 is connected with an atmospheric air inlet 342. The pressure equalizing and distributing chamber 341 is used to simultaneously generate negative pressure for a plurality of devices required for negative pressure and can maintain the pressure between the devices required for negative pressure to be equal. The negative pressure channel 302 is used for connecting with equipment required by negative pressure; the atmospheric passageway 301 is supplemented with atmospheric air through an atmospheric air inlet 342. During the use, through the pressure regulating subassembly, can provide negative pressure, malleation and ordinary pressure three kinds of states for the required equipment of negative pressure, through controlling the ordinary pressure opening, the function switching under each state can be realized to the break-make of control pressure regulating passageway 343 and ordinary pressure passageway 301.

The pressure regulating passage 343 is provided with a first control valve 345 and a one-way conduction valve 346, and the normal pressure passage 301 is provided with a second control valve 347. The first control valve 345 is used for controlling the on-off of the pressure regulating channel 343, the one-way conduction valve 346 is used for enabling the pressure regulating channel 343 to form one-way conduction to prevent backflow, and the second control valve 347 is used for controlling the on-off of the normal pressure channel 301. When the pressure equalizing and distributing cavity 341 is used, if the negative pressure needs to be eliminated, the telescopic air bag 310 is jacked up, if the telescopic air bag 310 reaches the maximum compression degree, the negative pressure cannot be completely eliminated, and the adsorption pressure can be reduced to the normal pressure by further opening the first control valve 345; or equipment required by negative pressure is further connected into the normal pressure channel 301, and air is directly introduced by opening the second control valve 347, so that the problem of negative pressure which cannot be adjusted is solved.

The atmospheric opening is also provided with a gas filtration unit 348. The gas filtering device 348 is used to filter the gas from the atmospheric gas inlet 342. The pressure control assembly further includes a housing within which at least the bellows 310 and the weight assembly 320 are disposed. The housing serves to protect the bellows 310 and the components connected thereto. When the telescopic air bag 310 is used, the upper end of the telescopic air bag 310 is fixed at the upper part of the shell, the telescopic air bag 310 extends downwards, and the operation condition of the telescopic air bag 310 can be observed through the observation port.

A position sensor for detecting the expansion degree of the expansion airbag 310 is provided in the housing. The position sensor is used for detecting the position of the bottom of the telescopic air bag 310, when the telescopic air bag adjusting device is used, the movement range of the air bag adjusting device can be further limited through the position sensor, a second control protection is provided for the air bag adjusting device, excessive compression on the telescopic air bag 310 is avoided, and the highest point of the air bag adjusting device after adjustment is lower than the lowest height of the counterweight component 320 when the telescopic air bag 310 extends to the maximum. At the same time, the change in negative pressure can be monitored by continuously monitoring the current maintenance of the bellows 310.

The weight assembly 320 includes a weight plate for adjusting the weight and a weight support 321 for supporting the weight plate, the weight support 321 being connected to the bellows 310. The weight plate and the weight support 321 form an easy-to-detach connection, and the pressure on the telescopic air bag 310 can be quickly adjusted through superposition of the weight plate. In the use process, according to the requirement of negative pressure suction, the counterweight plates are configured, inserted into the connecting rods through the assembly openings and stacked on the supporting plate from bottom to top.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.

Claims (10)

1. An ink system for an industrial printer, comprising: the ink jet head comprises an ink jet head and an ink circulation branch connected with the ink jet head, wherein the ink circulation branch comprises:

the ink containing cavity is communicated with the ink gun through a liquid supply channel;

one end of the ink guide cavity is communicated with the ink gun, and the other end of the ink guide cavity is communicated with the liquid supply channel;

the liquid return channel is connected with the ink accommodating cavity and the ink guide cavity;

the ink system further includes:

the pressure control assembly is respectively connected with the ink guide cavity and the ink containing cavity;

and the maintenance ink receiving tray is arranged below the ink jet head.

2. The ink system of the industrial printer as claimed in claim 1, wherein a liquid level detector is disposed in the ink containing chamber and/or the ink guide chamber.

3. The ink system of claim 1, wherein the liquid supply channel and/or the liquid return channel is provided with a temperature control device.

4. The ink system of claim 1, wherein the ink chamber further comprises a filter device, and the liquid return channel is communicated with the interior of the ink chamber through the filter device.

5. The ink system of the industrial printer as claimed in claim 1, further comprising an ink cartridge communicating with the ink guide chamber through an ink replenishment passage.

6. The ink system of the industrial printer as claimed in any one of claims 1 to 5, wherein the pressure control assembly comprises:

a telescopic air bag provided with an air suction port;

the counterweight component is arranged on the telescopic air bag;

the pressure channel is used for connecting the telescopic air bag and the ink circulation branch;

and the air bag adjusting device is movably connected with the telescopic air bag.

7. The ink system of the industrial printer as claimed in claim 6, wherein the air bag adjusting means comprises: the pushing component is arranged below the counterweight component, and the driving device drives the pushing component to move up and down.

8. The ink system of claim 6, wherein the pressure control assembly further comprises a pressure regulating assembly, the pressure regulating assembly comprising:

the pressure equalizing distribution cavity is connected with the pressure channel and is provided with at least one negative pressure channel communicated with the inside;

the normal pressure air inlet is communicated with the external normal pressure environment;

the pressure regulating channel is connected with the normal-pressure air inlet and the pressure-equalizing distribution cavity;

and the normal pressure channel is connected with the normal pressure air inlet.

9. The ink system of claim 6, wherein the pressure control assembly further comprises a housing, at least the bellows and the weight assembly being disposed within the housing, the housing having a position sensor disposed therein for detecting the degree of bellows expansion.

10. The ink system of claim 6, wherein the weight assembly comprises a weight plate for adjusting the weight and a weight support for supporting the weight plate, the weight support being connected to the bellows.

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