Flow control method and flow control system in ink viscosity fluctuation state

Abstract

The invention belongs to the technical field of pumps, and particularly relates to a flow control method and a flow control system in an ink viscosity fluctuation state, and the flow control method in the ink viscosity fluctuation state comprises the following steps: continuously conveying ink by adopting a corrugated pipe pump; the air pressure value of the pneumatic regulator is regulated and controlled according to viscosity data of printing ink about to enter the corrugated pipe, so that the corrugated pipe sucks the printing ink at a constant flow; the air pressure value of the pneumatic regulator is regulated and controlled according to viscosity data of the printing ink about to flow out of the corrugated pipe, so that the corrugated pipe conveys the printing ink at constant flow; wherein the flow of the sucked ink is the same as the flow of the conveyed ink; according to the flow control method and the flow control system in the ink viscosity fluctuation state, the viscosity data of the ink which is about to enter the corrugated pipe is collected in real time, and the air pressure value of the pneumatic regulator is regulated according to the collected ink viscosity data, so that the pneumatic regulator can drive the corrugated pipe to absorb the ink or convey the ink at a constant flow.

Description

Technical Field

[0001] The present invention belongs to the technical field of pumps, specifically relates to liquid displacement pumps, and particularly relates to a flow control method and a flow control system under the condition of fluctuating ink viscosity. Background Art

[0002] In the production process of packaging bags, a spraying process is required, and corresponding ink is used for spraying. During the spraying process, the stability of the conveying flow needs to be ensured.

[0003] In the spraying process, a bellows pump is generally used for liquid infusion. In the related art, the bellows pump uses two bellows to reciprocate, and is driven by a pneumatic regulator, so that while one bellows sucks ink under negative pressure, the other bellows squeezes and conveys the ink, thereby realizing continuous conveying.

[0004] However, in the above solution during the conveying process, when the viscosity of the ink changes, the conveying flow will become unstable.

[0005] Therefore, how to solve the technical problem that the conveying flow becomes unstable when the ink viscosity changes is an urgent problem to be solved by those skilled in the art.

[0006] It should be noted that the above information disclosed in this background art part is only used to understand the background art of the concept of this application. Therefore, the above description is not considered as information of the prior art. Summary of the Invention

[0007] The embodiments of the present disclosure at least provide a flow control method and a flow control system under the condition of fluctuating ink viscosity.

[0008] In a first aspect, the embodiments of the present disclosure provide a flow control method under the condition of fluctuating ink viscosity, including: continuously conveying ink by using a bellows pump; adjusting the air pressure value of the pneumatic regulator according to the ink viscosity data about to enter the bellows, so that the bellows sucks ink at a constant flow rate; adjusting the air pressure value of the pneumatic regulator according to the ink viscosity data about to flow out of the bellows, so that the bellows conveys ink at a constant flow rate; wherein, the flow rate of sucking ink is the same as the flow rate of conveying ink.

[0009] In an optional embodiment, the method of continuously conveying ink by using a bellows pump includes: while one pneumatic regulator in the bellows pump drives the corresponding bellows to suck ink, the other pneumatic regulator in the bellows pump drives the corresponding bellows to convey ink.

[0010] In an alternative embodiment, the method of regulating the air pressure value of the pneumatic regulator according to the ink viscosity data about to enter the bellows so that the bellows sucks ink at a constant flow rate includes: collecting the ink viscosity data η about to enter the bellows through a first viscosity sensor 1 ; regulating the pneumatic regulator to the required air pressure value P according to the collected ink viscosity data η through a control module 1 to drive the bellows pump to suck ink 1

[0011] In an alternative embodiment, the formula for setting the air pressure value P required for sucking ink is 1 : where P 1 is the air pressure value actually required for the pneumatic regulator to suck ink, in kPa; P a is the reference air pressure value when the pneumatic regulator sucks ink, in kPa; k is the adjustment coefficient; η 1 is the ink viscosity data about to enter the bellows obtained by the first viscosity sensor, in Pa·s; η 0 is the standard viscosity data of the ink, in Pa·s

[0012] In an alternative embodiment, the method of regulating the air pressure value of the pneumatic regulator according to the ink viscosity data about to flow out of the bellows so that the bellows conveys ink at a constant flow rate includes: collecting the ink viscosity data η about to flow out of the bellows through a second viscosity sensor 2 ; regulating the pneumatic regulator to the required air pressure value P according to the collected ink viscosity data η through a control module 2 to drive the bellows pump to convey ink 2

[0013] In an alternative embodiment, the formula for setting the air pressure value P required for conveying ink is 2 : where P 2 is the air pressure value actually required for the pneumatic regulator to convey ink, in kPa; P b is the reference air pressure value when the pneumatic regulator conveys ink, in kPa; k is the adjustment coefficient; η 2 is the ink viscosity data about to flow out of the bellows obtained by the second viscosity sensor, in Pa·s; η 0 is the standard viscosity data of the ink, in Pa·s

[0014] ​​In a second aspect, an embodiment of the present disclosure further provides a flow control device under the condition of fluctuating ink viscosity, including: a bellows pump for continuously conveying ink, and including: a pump body, in which a pair of bellows and a pair of pneumatic regulators are arranged; a liquid inlet pipe connected to the feed ports of the two bellows; a liquid outlet pipe connected to the discharge ports of the two bellows; a pair of first viscosity sensors for respectively acquiring the viscosity data of the ink in the corresponding feed ports; a pair of second viscosity sensors for respectively acquiring the viscosity data of the ink in the corresponding discharge ports; a control module configured to regulate the air pressure value of the corresponding pneumatic regulator according to the ink viscosity data collected by the corresponding viscosity sensor.

[0015] In a third aspect, an embodiment of the present disclosure further provides a flow control system under the condition of fluctuating ink viscosity, including: an acquisition module configured to acquire the ink viscosity data about to enter the bellows and the ink viscosity data about to flow out of the bellows; an adjustment module configured to regulate the air pressure value of the corresponding pneumatic regulator so that the bellows suck ink at a constant flow rate and convey ink at a constant flow rate.

[0016] In a fourth aspect, an embodiment of the present disclosure further provides a computer-readable storage medium, on which a computer program / instructions are stored, and when the computer program / instructions are executed by a processor, the steps of the flow control method under the condition of fluctuating ink viscosity as described above are implemented.

[0017] In a fifth aspect, an embodiment of the present disclosure further provides a computer program product, including computer program / instructions, and when the computer program / instructions are executed by a processor, the steps of the flow control method under the condition of fluctuating ink viscosity as described above are implemented.

[0018] The beneficial effect of the present invention is that the flow control method and the flow control system under the condition of fluctuating ink viscosity of the present invention collect the ink viscosity data about to enter the bellows in real time, and adjust the air pressure value of the pneumatic regulator according to the collected ink viscosity data, so that the pneumatic regulator can drive the bellows to absorb ink or convey ink at a constant flow rate, avoiding large changes in pressure during subsequent spraying treatment due to unstable conveying flow rate.

[0019] Other features and advantages of the present invention will be described in the subsequent specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention are achieved and obtained by the structures specifically pointed out in the specification and the drawings.

[0020] To make the above objectives, features, and advantages of the present invention more obvious and understandable, specific preferred embodiments are hereby given, and in conjunction with the accompanying drawings, the following detailed description is provided. Description of the Drawings

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 The principle block diagram of a flow control method under the condition of ink viscosity fluctuation provided by an embodiment of the present disclosure;

[0023] Figure 2 The structural schematic diagram of a bellows pump provided by an embodiment of the present disclosure.

[0024] In the figure:

[0025] Bellows pump 1, pump body 10, pneumatic regulator 11, bellows 12, feed port 121, discharge port 122, liquid inlet pipe 13, liquid outlet pipe 14. Specific embodiments

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0027] For example, in the bellows pump device with the publication number of "CN111306045B", the bellows pump 1 at least includes: a pair of bellows 12 and a pair of pneumatic regulators 11. The pneumatic regulator 11 is used to drive the bellows 12 to work, so that the volume inside the bellows 12 changes, thereby enabling the bellows 12 to suck ink under negative pressure or squeeze and convey the sucked ink.

[0028] In the related art, the air pressure value of the pneumatic regulator 11 is preset according to the standard viscosity data of the ink. During the working process of the bellows pump 1, the air pressure value of the pneumatic regulator 11 does not change. However, it is difficult to always maintain the ink viscosity uniform. When the ink viscosity changes, it will cause the flow rate of the bellows 12 to absorb or convey ink to fluctuate, thus affecting the stability of subsequent processes.

[0029] It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, in the drawings, for the effective description of the technical content, the thickness of the components can be exaggerated or reduced.

[0030] The following will, in conjunction with the accompanying drawings, elaborate on some embodiments of the present invention. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0031] As Figure 1 shown, at least one embodiment provides a flow control method under the condition of ink viscosity fluctuation, which is characterized by including: continuously conveying ink by a bellows pump 1; regulating the air pressure value of a pneumatic regulator 11 according to the ink viscosity data about to enter a bellows 12, so that the bellows 12 sucks ink at a constant flow rate; regulating the air pressure value of the pneumatic regulator 11 according to the ink viscosity data about to flow out of the bellows 12, so that the bellows 12 conveys ink at a constant flow rate; wherein, the flow rate of sucking ink is the same as the flow rate of conveying ink.

[0032] In this embodiment, by collecting in real time the ink viscosity data about to enter the bellows 12 and regulating the air pressure value of the pneumatic regulator 11 according to the collected ink viscosity data, the pneumatic regulator 11 can drive the bellows 12 to suck ink or convey ink at a constant flow rate, avoiding large changes in pressure during subsequent spraying treatment due to unstable conveying flow rate.

[0033] As Figure 2 shown, in some embodiments, the method of continuously conveying ink by the bellows pump 1 includes: while one pneumatic regulator 11 in the bellows pump 1 drives the corresponding bellows 12 to suck ink, the other pneumatic regulator 11 in the bellows pump 1 drives the corresponding bellows 12 to convey ink.

[0034] In this embodiment, the two bellows 12 in the bellows pump 1 convey ink alternately, that is, when one bellows 12 sucks ink, the other bellows 12 squeezes and conveys ink, so that the bellows pump 1 can continuously convey.

[0035] The structures of the two bellows 12 are the same. The following will take one of the bellows 12 as an example for illustration.

[0036] In some embodiments, the method of regulating the air pressure value of the pneumatic regulator 11 according to the ink viscosity data about to enter the bellows 12, so that the bellows 12 sucks ink at a constant flow rate includes: collecting the ink viscosity data η about to enter the bellows 12 through a first viscosity sensor 1 ; regulating the pneumatic regulator 11 to the required air pressure value P 1 through a control module according to the collected ink viscosity data η 1 to drive the bellows pump 1 to suck ink.

[0037] In this embodiment, the first viscosity sensor is disposed within the feed port of the bellows 12. After the first viscosity sensor acquires viscosity data, it sends the data to the control module, and the control module obtains the required air pressure value P of the pneumatic regulator 11 based on the received viscosity data η 1 so that the pneumatic regulator 11 can drive the bellows 12 to suck ink at a constant flow rate. 1 In some embodiments, the formula for setting the required air pressure value P for sucking ink is as follows:

[0038] where P 1 is the actual required air pressure value of the pneumatic regulator 11 for sucking ink, with the unit of kPa; P is the reference air pressure value of the pneumatic regulator 11 when sucking ink, with the unit of kPa; k is the adjustment coefficient; η 1 is the viscosity data of the ink about to enter the bellows 12 acquired by the first viscosity sensor, with the unit of Pa·s; η a is the standard viscosity data of the ink, with the unit of Pa·s. 1 0 0 a

[0039] In this embodiment, optionally, the standard viscosity data η of the ink is 50 Pa·s; the reference air pressure value P of the pneumatic regulator 11 when sucking ink is -70 kPa; k is 0.3; the data η acquired by the first viscosity sensor is 60 Pa·s. 0 a 1 a 1 1

[0040] That is, the required air pressure value P for sucking ink is: 1

[0041]

[0041] In some embodiments, the method for regulating the air pressure value of the pneumatic regulator 11 according to the viscosity data of the ink about to flow out of the bellows 12 so that the bellows 12 conveys ink at a constant flow rate includes: collecting the viscosity data η of the ink about to flow out of the bellows 12 through the second viscosity sensor; regulating the pneumatic regulator 11 to the required air pressure value P by the control module according to the collected viscosity data η of the ink so as to drive the bellows pump 1 to convey ink. 2 2 2 2 2

[0042]

[0042] In this embodiment, the second viscosity sensor is disposed within the discharge port of the bellows 12. After the second viscosity sensor acquires viscosity data, it sends the data to the control module, and the control module obtains the required air pressure value P of the pneumatic regulator 11 based on the received viscosity data η 2 so that the pneumatic regulator 11 can drive the bellows 12 to extrude and convey ink at a constant flow rate. 2

[0043] In some embodiments, the air pressure value P required for ink delivery is set 2 The formula for is: where P 2 is the air pressure value required for the pneumatic regulator 11 to actually deliver ink, with the unit of kPa; P b is the reference air pressure value when the pneumatic regulator 11 delivers ink, with the unit of kPa; k is the adjustment coefficient; η 2 is the ink viscosity data of the ink about to flow out of the bellows 12 obtained by the second viscosity sensor, with the unit of Pa·s; η 0 is the standard viscosity data of the ink, with the unit of Pa·s.

[0044] In this embodiment, optionally, the standard viscosity data η of the ink 0 is 50 Pa·s; the reference air pressure value P when the pneumatic regulator 11 sucks ink a is 300 kPa; k is 0.3; the data η collected by the second viscosity sensor 2 is 45 Pa·s.

[0045] That is, the air pressure value P required for ink delivery 2 is:

[0046] As Figure 2 shown, at least one embodiment further provides a flow control device under the condition of ink viscosity fluctuation, including: a bellows pump 1 for continuously delivering ink, and including: a pump body 10, in which a pair of bellows 12 and a pair of pneumatic regulators 11 are arranged; a liquid inlet pipe 13 connected to the feed ports 121 of the two bellows 12; a liquid outlet pipe 14 connected to the discharge ports 122 of the two bellows 12; a pair of first viscosity sensors for respectively obtaining the viscosity data of the ink in the corresponding feed ports 121; a pair of second viscosity sensors for respectively obtaining the viscosity data of the ink in the corresponding discharge ports 122; a control module configured to regulate the air pressure value of the corresponding pneumatic regulator 11 according to the ink viscosity data collected by the corresponding viscosity sensor.

[0047] At least one embodiment further provides a flow control system under the condition of ink viscosity fluctuation, including: a collection module configured to collect the ink viscosity data of the ink about to enter the bellows 12 and the ink viscosity data of the ink about to flow out of the bellows 12; an adjustment module configured to regulate the air pressure value of the corresponding pneumatic regulator 11 so that the bellows 12 sucks ink at a constant flow rate and delivers ink at a constant flow rate.

[0048] At least one embodiment also provides a computer-readable storage medium having computer programs / instructions stored thereon, characterized in that when the computer programs / instructions are executed by a processor, the steps of the flow control method in the above-described ink viscosity fluctuation state are implemented.

[0049] At least one embodiment also provides a computer program product, including computer programs / instructions, characterized in that when the computer programs / instructions are executed by a processor, the steps of the flow control method in the above-described ink viscosity fluctuation state are implemented.

[0050] In summary, the flow control method and the flow control system in the ink viscosity fluctuation state of the present invention collect the ink viscosity data about to enter the bellows 12 in real time, and adjust the air pressure value of the pneumatic regulator 11 according to the collected ink viscosity data, so that the pneumatic regulator 11 can drive the bellows 12 to absorb or convey ink at a constant flow rate, avoiding large changes in pressure during subsequent spraying treatment due to unstable conveying flow rates.

[0051] In this document, when it is mentioned that a first component is located on a second component, this may mean that the first component can be directly formed on the second component, or a third component can be interposed between the first component and the second component.

[0052] In this document, when an element or layer is referred to as "being located on", "joined to", "connected to", "attached to", or "coupled to" another element or layer, it can be directly located on, joined, connected, attached, or coupled to the other element or layer, or there may be intermediate elements or layers. In contrast, when an element is referred to as "directly on another element or layer", "directly joined to", "directly connected to", "directly attached to", or "directly coupled to" another element or layer, there may be no intermediate elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" vs. "directly between", "adjacent" vs. "directly adjacent", etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0053] In this document, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0054] The terms used herein are for the purpose of describing particular exemplary configurations only and are not intended to be limiting. As used herein, the singular articles "a", "an", and "the" may also be intended to include the plural forms, unless the context clearly indicates otherwise. The terms "comprising", "including", and "having" are inclusive and thus specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as necessarily requiring them to be performed in the particular order discussed or illustrated, unless specifically identified as an order of performance. Additional or alternative steps may be employed.

[0055] As used herein, phrases such as "in one embodiment", "according to one embodiment", "in some embodiments", etc., generally refer to the fact that the particular feature, structure, or characteristic following such phrase may be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example", "exemplary", etc. are used "as an example, instance, or illustration. Any embodiment, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other embodiments, aspects, or designs. Rather, the use of the terms "example", "exemplary", etc. is intended to present concepts in a concrete manner.

[0056] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention may be understood according to specific circumstances.

[0057] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, terms such as "first", "second", and other numerical terms used herein do not imply an order or sequence, unless the context clearly indicates otherwise. Thus, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or section discussed above may be referred to as the second element, component, region, layer, or section.

[0058] Spatially relative terms, such as "inner", "outer", "beneath", "below", "lower", "above", "upper", etc., may be used herein for ease of description to describe the relationship of one element or feature to another element or feature as illustrated in the figures. In addition to the orientation depicted in the figures, spatially relative terms are intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is turned over, an element described as "beneath" or "below" other elements or features will be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an above and below orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein are to be interpreted accordingly.

[0059] In the above discussion, unless otherwise specified, when used to describe a numerical value, terms such as "about", "approximately", "substantially", etc. mean a variation of + / − 10% of that value.

[0060] Inspired by the above-described ideal embodiments of the present invention, through the above description, relevant workers can, without departing from the technical idea of the present invention, make various changes and modifications. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A flow control method under ink viscosity fluctuation state, characterized in that: include: A bellows pump (1) is used to continuously deliver ink; According to the viscosity data of the ink about to enter the bellows (12), the air pressure value of the pneumatic regulator (11) is adjusted so that the bellows (12) absorbs the ink at a constant flow rate; According to the viscosity data of the ink about to flow out of the bellows (12), the air pressure value of the pneumatic regulator (11) is regulated so that the bellows (12) conveys the ink at a constant flow rate; The flow rate of ink absorption is the same as the flow rate of ink delivery.

2. The flow control method under the condition of ink viscosity fluctuation as claimed in claim 1, characterized in that: The method for continuously conveying ink using a bellows pump (1) comprises: One pneumatic regulator (11) in the bellows pump (1) drives the corresponding bellows (12) to absorb ink, while another pneumatic regulator (11) in the bellows pump (1) drives the corresponding bellows (12) to transport ink.

3. The flow control method under the condition of ink viscosity fluctuation as claimed in claim 2, characterized in that: The method of regulating the air pressure value of the pneumatic regulator (11) according to the viscosity data of the ink about to enter the bellows (12) so that the bellows (12) absorbs the ink at a constant flow rate comprises: The viscosity data of the ink about to enter the bellows (12) is collected by the first viscosity sensor η 1 ; Through the control module according to the collected ink viscosity data η 1 Adjust the pneumatic regulator (11) to the required air pressure value. P 1 The bellows pump (1) is driven to suck up ink.

4. The flow control method under the condition of ink viscosity fluctuation as claimed in claim 3, characterized in that: Set the air pressure required to absorb ink P 1 The formula is: ; in, P 1 is the air pressure value required by the pneumatic regulator (11) to actually absorb the ink, in kPa; P a is the reference air pressure value when the pneumatic regulator (11) absorbs ink, the unit is kPa; k is the adjustment coefficient; η 1 is the viscosity data of the ink about to enter the bellows (12) obtained by the first viscosity sensor, in units of Pa·s; η 0 It is the standard viscosity data of ink, the unit is Pa·s.

5. The flow control method under the condition of ink viscosity fluctuation as claimed in claim 4, characterized in that: The method of regulating the air pressure value of the pneumatic regulator (11) according to the viscosity data of the ink about to flow out of the bellows (12) so as to enable the bellows (12) to transport the ink at a constant flow rate comprises: The viscosity data of the ink about to flow out of the bellows (12) is collected by the second viscosity sensor η 2 ; Through the control module according to the collected ink viscosity data η 2 Adjust the pneumatic regulator (11) to the required air pressure value. P 2 The bellows pump (1) is driven to deliver ink.

6. The flow control method under the condition of ink viscosity fluctuation as claimed in claim 5, characterized in that: Set the air pressure required to transport ink P 2 The formula is: ; in, P 2 is the air pressure value required by the pneumatic regulator (11) to actually transport the ink, in kPa; P b is the reference air pressure value when the pneumatic regulator (11) delivers ink, in kPa; k is the adjustment coefficient; η 2 is the viscosity data of the ink about to flow out of the bellows (12) obtained by the second viscosity sensor, in units of Pa·s; η 0 It is the standard viscosity data of ink, the unit is Pa·s.

7. A flow control device under the condition of ink viscosity fluctuation, characterized in that: include: A bellows pump (1) is used for continuously conveying ink and comprises: a pump body (10), wherein a pair of bellows (12) and a pair of pneumatic regulators (11) are arranged in the pump body (10); A liquid inlet pipe (13) connected to the feed ports (121) of the two bellows (12); A liquid outlet pipe (14) connected to the outlets (122) of the two corrugated tubes (12); A pair of first viscosity sensors, used to respectively obtain viscosity data of ink in corresponding feed ports (121); A pair of second viscosity sensors, used to respectively obtain viscosity data of ink in corresponding discharge ports (122); The control module is configured to adjust the air pressure value of the corresponding pneumatic regulator (11) according to the ink viscosity data collected by the corresponding viscosity sensor.

8. A flow control system under the condition of ink viscosity fluctuation, characterized in that: include: A collection module configured to collect viscosity data of ink about to enter the bellows (12) and to collect viscosity data of ink about to flow out of the bellows (12); The regulating module is configured to regulate the air pressure value of the corresponding pneumatic regulator (11) so that the bellows (12) absorbs ink at a constant flow rate and delivers ink at a constant flow rate.

9. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instruction is executed by a processor, the steps of the flow control method under the ink viscosity fluctuation state described in any one of claims 1-6 are implemented.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instruction is executed by a processor, the steps of the flow control method under the ink viscosity fluctuation state described in any one of claims 1-6 are implemented.

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