CN109267279B

CN109267279B - Dyeing equipment capable of enhancing dye liquor circulation and dyeing method

Info

Publication number: CN109267279B
Application number: CN201811388802.9A
Authority: CN
Inventors: 陈新福; 陈玉洪; 李树路; 张玉高
Original assignee: Guangdong Esquel Textiles Co Ltd
Current assignee: Guangdong Esquel Textiles Co Ltd
Priority date: 2018-11-21
Filing date: 2018-11-21
Publication date: 2023-08-29
Anticipated expiration: 2038-11-21
Also published as: CN109267279A

Abstract

The application provides a dyeing device and a dyeing method capable of enhancing dye liquor circulation, and in one embodiment, the dyeing device comprises: the dyeing vat is internally provided with a creel for stringing materials to be dyed, the side wall of the dyeing vat is provided with a liquid return port and a plurality of auxiliary liquid suction ports positioned at different height positions, each auxiliary liquid suction port is respectively connected with an auxiliary liquid suction branch pipe, and each auxiliary liquid suction branch pipe is respectively provided with an auxiliary liquid suction valve; and the inlet end of the auxiliary circulating pump is communicated with the auxiliary liquid suction branch pipes, and the outlet end of the auxiliary circulating pump is communicated with the liquid return port through the liquid return pipe. The dyeing equipment and the dyeing method can effectively solve the problems of insufficient circulation of the dye liquor and uneven dye distribution in the process of dyeing yarns by using the non-uniform dyeing medium, thereby enhancing the circulation force of the dye liquor and finally improving the dyeing uniformity.

Description

Dyeing equipment capable of enhancing dye liquor circulation and dyeing method

Technical Field

The application relates to the technical field of dyeing equipment, in particular to dyeing equipment and a dyeing method capable of enhancing dye liquor circulation.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

The textile printing and dyeing industry is a large household of industrial water, can generate a large amount of high-chroma waste water and has great environmental pollution. The textile printing industry wastewater mainly results from the fiber dyeing stage, especially reactive dye dyeing. Unavoidable hydrolysis of the dye results in waste of resources and serious water pollution. With the increasing shortage of water resources, the national environmental protection regulation is upgraded, the nonaqueous medium dyeing is developed, the water consumption is reduced, the printing and dyeing sewage is reduced, and the method becomes a great direction for upgrading the printing and dyeing industry.

In the development of non-aqueous medium dyeing, non-uniform dyeing media are often involved. Non-uniform dyeing media are mainly two gelatinous substances composed of organic solvents (e.g. dimethyl carbonate and petroleum ether) which are not miscible at normal temperature. However, in either the multiphase medium mixed dyeing or the heterogeneous dyeing medium method, the distribution of the dye in the non-dyeing medium cannot reach the uniformity degree of the dye distribution in the aqueous phase dyeing, and the dissolution and dispersion degree of the dye directly affects the final dyeing uniformity.

In particular, in the industrial process, the production equipment and dyeing scale are increased, and the amount of non-uniform dyeing medium used for single dyeing is increased. The dissolution and dispersion uniformity of the dye is more difficult to control, the uneven distribution of the dye and the uneven dyeing medium in the whole dye bath is aggravated, and the dyeing leveling property is often caused to be substandard. Especially in the dyeing of cone yarns: the cone yarn dyeing is difficult to control uniformly due to thicker yarn bodies, and compared with loose fiber dyeing and piece dyeing, the cone yarn dyeing is more difficult to achieve even dyeing.

The inventor discovers through long-term field practice that in a non-uniform dyeing medium, in a circulation system of a common dye vat, a liquid suction port of a circulation main pump is fixed at the bottom of the dye vat, and auxiliary circulation pumps suck liquid from the bottom of the dye vat and penetrate through a creel.

However, for a non-uniform medium of dye liquor, the dye liquor concentration is not uniformly distributed at each location in the cylinder. The full circulation of dye can not be realized only through the liquid suction circulation at the bottom of the cylinder, so that the circulation force of dye liquor is weaker, and the uniformity of dyed yarn is poorer.

It should be noted that the foregoing description of the background art is only for the purpose of providing a clear and complete description of the technical solution of the present application and is presented for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background of the application section.

Disclosure of Invention

Based on the defects in the prior art, the embodiment of the application provides dyeing equipment and a dyeing method capable of enhancing the circulation of dye liquor, which can effectively solve the problems of insufficient circulation of the dye liquor and uneven dye distribution in the process of dyeing yarns with non-uniform dyeing media, thereby enhancing the circulation force of the dye liquor and finally improving the dyeing uniformity.

In order to achieve the above object, the present application provides the following technical solutions.

A dyeing apparatus capable of enhancing dye liquor circulation comprising:

the dyeing machine comprises a dye vat, wherein a creel for stringing materials to be dyed is arranged in the dye vat, a liquid return port and a plurality of auxiliary liquid suction ports positioned at different height positions are arranged on the side wall of the dye vat, each auxiliary liquid suction port is respectively connected with an auxiliary liquid suction branch pipe, and each auxiliary liquid suction branch pipe is respectively provided with an auxiliary liquid suction valve;

the inlet end of the auxiliary circulating pump is communicated with the auxiliary liquid suction branch pipes, and the outlet end of the auxiliary circulating pump is communicated with the liquid return port through the liquid return pipe.

Preferably, the creel comprises a base and a dyeing shaft arranged on the base and used for stringing materials to be dyed;

the liquid return port is configured to be at least not higher than the lowermost material to be dyed in the vertical direction.

Preferably, a plurality of auxiliary liquid suction branch pipes are commonly connected with an auxiliary liquid suction trunk pipe, and the auxiliary liquid suction trunk pipe is communicated with the inlet end of the auxiliary circulating pump.

Preferably, the dyeing equipment further comprises a circulating main pump, the outlet end of the circulating main pump is communicated with the creel through a liquid outlet pipe, the inlet end of the circulating main pump is communicated with a liquid inlet pipe, and a liquid inlet valve is arranged on the liquid inlet pipe.

Preferably, a main liquid suction port is arranged at the bottom of the dye vat, the main liquid suction port is communicated with the inlet end of the circulating main pump through a main liquid suction pipe, and a main liquid suction valve is arranged on the main liquid suction pipe.

Preferably, the main liquid suction pipe is connected with the liquid inlet pipe, and a convergence point is formed at the connection part of the main liquid suction pipe and the liquid inlet pipe; the other end of the liquid inlet pipe is used for being communicated with an external material cylinder, and the liquid inlet valve is positioned between the converging point and the end part of the liquid inlet pipe, which is used for being communicated with the external material cylinder.

Preferably, the inlet end of the circulating main pump is connected with a first port of a three-way joint, a second port of the three-way joint is connected with the liquid inlet pipe, and a third port of the three-way joint is connected with the main liquid suction pipe.

A dyeing apparatus capable of enhancing dye liquor circulation comprising: a dye vat, an auxiliary circulating pump and a circulating main pump;

a creel is arranged in the dye vat and is used for stringing materials to be dyed;

the side wall of the dye vat is provided with a liquid return port and a plurality of auxiliary liquid suction ports positioned at different height positions, each auxiliary liquid suction port is respectively connected with an auxiliary liquid suction branch pipe, each auxiliary liquid suction branch pipe is respectively provided with an auxiliary liquid suction valve, and a plurality of auxiliary liquid suction branch pipes are commonly connected with an auxiliary liquid suction trunk pipe;

the inlet end of the auxiliary circulating pump is communicated with the auxiliary liquid suction main pipeline, and the outlet end of the auxiliary circulating pump is communicated with the liquid return port through a liquid return pipe;

the bottom of the dye vat is provided with a main liquid suction port, the main liquid suction port is communicated with the inlet end of the circulating main pump through a main liquid suction pipe, the main liquid suction pipe is provided with a main liquid suction valve, and the outlet end of the circulating main pump is communicated with the creel through a liquid outlet pipe; the inlet end of the circulating main pump is also communicated with a liquid inlet pipe;

the liquid inlet pipe is provided with a liquid inlet valve and is used for being communicated with an external material cylinder;

the auxiliary liquid suction branch circuits, the auxiliary liquid suction trunk pipes, the auxiliary circulating pump, the liquid return pipe and the dye vat are constructed to form an auxiliary circulating path; the main liquid suction pipe, the circulating main pump, the liquid outlet pipe and the dye vat are constructed to form a main circulating path.

A method for dyeing by the dyeing apparatus according to the above embodiment, comprising:

closing all the auxiliary imbibition valves, the main imbibition valve and the auxiliary circulating pump, opening the liquid inlet valve and the circulating main pump, and pumping the dye liquor in the external material cylinder into the dye vat through the liquid inlet pipe and the liquid outlet pipe under the pumping action of the circulating main pump;

when the dye liquor height in the dye vat does not exceed the auxiliary liquid suction port positioned at the lowest part, the main liquid suction valve is opened, and the dye liquor circulates in the main circulation path under the pumping action of the circulating main pump;

when the dye liquor in the dye vat rises to submerge one or more auxiliary liquid suction ports, the concentration of the dye liquor in the areas with different heights in the dye vat is obtained;

and opening one or more auxiliary liquid suction valves on the auxiliary liquid suction branch pipes corresponding to the designated height areas according to the acquired concentration of the dye liquor in the different height areas in the dye vat, wherein the dye liquor in the designated height areas circulates in the auxiliary circulating path under the pumping action of the auxiliary circulating pump.

the liquid return port is positioned below the lowest auxiliary liquid suction port, so that the liquid return port is closer to the main liquid suction port than the auxiliary liquid suction port;

when one or more auxiliary liquid suction valves on the auxiliary liquid suction branch pipes corresponding to the designated height area are opened, the main liquid suction valve is not closed, so that the auxiliary circulation path and the main circulation path are simultaneously opened; thus, part of the dye liquor returned to the dye vat through the liquor return port is sucked into the main circulation path again near the main liquor suction port and circulates in the main circulation path under the pumping action of the circulating main pump.

According to the dyeing equipment and the dyeing method, the side wall of the dye vat is provided with the auxiliary liquid suction ports positioned at different height positions and the liquid return ports communicated with the auxiliary liquid suction ports through the auxiliary circulating pump, so that the dye liquor in the areas with different heights in the dye vat can be controlled to participate in the internal circulation of the dye vat and the creel under the action of the auxiliary circulating pump by opening and closing the auxiliary liquid suction valves on the auxiliary liquid suction branch pipes corresponding to the areas with different heights, and further the dye liquor in the areas with different designated heights in the dye vat can be fully circulated. Therefore, the circulation of the dye liquor can be enhanced, so that the dye liquor is circulated more fully, the purpose of uniform dyeing is achieved, and the dye is more suitable for application of the dye in a non-uniform dyeing medium.

Specific embodiments of the application are disclosed in detail below with reference to the following description and the accompanying drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the application are not limited in scope thereby. The embodiments of the application include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present application, and are not particularly limited. Those skilled in the art with access to the teachings of the present application can select a variety of possible shapes and scale sizes to practice the present application as the case may be. In the drawings:

fig. 1 is a schematic flow diagram of a dye solution and a schematic structure diagram of a dyeing apparatus according to an embodiment of the present application when a main circulation path and an auxiliary circulation path are simultaneously executed;

fig. 2 is a schematic flow diagram of a dye liquor when the dyeing apparatus according to the embodiment of the present application only performs a main circulation path;

fig. 3 is a flow chart of a dyeing method according to an embodiment of the present application.

Detailed Description

In order to make the technical solution of the present application better understood by those skilled in the art, the technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, shall fall within the scope of the application.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 and 2, the dyeing apparatus capable of enhancing circulation of dye liquor according to the embodiment of the present application may include a dye vat 1, an auxiliary circulation pump 2, and a circulation main pump 3.

A creel 4 is provided in the dye vat 1, and the creel 4 may include a base 401 and a dyeing shaft 402 provided on the base 401. The base 401 and the dyeing shaft 402 are hollow structures, and the inside of the base 401 and the inside of the dyeing shaft are communicated for circulating and circulating the dyeing liquid.

The dyeing shaft 402 may be provided with a plurality of dyeing liquor outlet holes communicating with the inner space of the dyeing shaft 402, and the dyeing shaft 402 may be provided with a material 5 (such as cheese) to be dyed. Meanwhile, the base 401 of the creel 4 is communicated with the outlet end of the circulating main pump 3 through a liquid outlet pipe 6. And the inlet end of the circulating main pump 3 is communicated with an external cylinder (not shown) through a feed pipe 7.

Therefore, through the pumping action of the circulating main pump 3, the dye liquor in the external material cylinder can be pumped into the creel 4 through the liquid inlet pipe 7 and the liquid outlet pipe 6 in sequence. Then, the dye liquor in the base 401 and the dye shaft 402 is pumped by the circulating main pump 3, finally flows out through the dye liquor outlet hole, and further the dye liquor 5 is subjected to penetrating dyeing.

The bottom of the dye vat 1 may be provided with a main suction port (not shown) communicating with the inlet end of the circulating main pump 3 through a main suction pipe 8. In this way, the main pipette 8, the main circulation pump 3, the outlet pipe 6 and the dye vat 1 are constructed to form a main circulation path. As shown in figures 1 and 2 of the drawings,is the main circulation path. The dye liquor can circulate in the main circulation path under the pumping action of the circulating main pump 3, so that the purpose of homogenizing the dye liquor can be achieved to a certain extent.

In order to control on-off of the liquid inlet and the main circulation path and provide different circulation paths for the dye liquor, a liquid inlet valve 701 can be arranged on the liquid inlet pipe 7, and a main liquid suction valve 801 can be arranged on the main liquid suction pipe 8.

In view of the above description, the uneven distribution of the dye and the non-uniform dyeing medium in the entire dye bath is serious due to poor dissolution and dispersion uniformity of the dye in the non-uniform dyeing medium.

Although the dyeing apparatus is provided with the above-described main circulation path. However, it has been proved that the main circulation path can perform a certain homogenization for the dissolution and dispersion of the dye in a uniform dyeing medium (e.g. water), but has a limited homogenization for the dissolution and dispersion of the dye in a non-uniform dyeing medium.

The main reason is that the main suction port is provided at the bottom of the vat 1, which sucks in the liquor in the area near the bottom of the vat 1. The dye vat 1 has larger volume and higher height, and the dye liquor in the dye vat is distributed at the height, so that the uniform concentration is difficult to achieve. Since the material 5 to be dyed, which is arranged in series on the creel 4, extends in the height direction. Therefore, the dye liquid sucked by the main liquid suction port, i.e., the circulation area, is difficult to sweep the space occupied by all the materials 5 to be dyed in the height direction. Therefore, the homogenization effect on the dye liquor and the circulation force of the dye liquor are poor, and the final dyeing uniformity of the material 5 to be dyed is poor.

In view of this, in order to avoid the situation of uneven final dyeing caused by poor homogenization of the dyeing liquor due to the design of the main circulation path only, the dyeing apparatus of the present application designs a specific structural scheme for enabling the dyeing liquor configured by the non-uniform dyeing medium to be sufficiently homogenized and enhancing the circulation force of the dyeing liquor.

Specifically, according to the condition that the dye liquor configured by the non-uniform dyeing medium is easy to have concentration difference on different height layers, a liquor return port and a plurality of auxiliary liquor suction ports (not shown) positioned at different height positions are arranged on the side wall of the dye vat 1. The plurality of auxiliary liquid suction ports are respectively connected with the inlet end of the auxiliary circulating pump 2 through auxiliary liquid suction branch pipes 9. And each auxiliary pipetting branch pipe 9 is provided with an auxiliary pipetting valve 901, respectively. The outlet end of the auxiliary circulating pump 2 is communicated with the liquid return port through a liquid return pipe 10.

In order to realize the intensification of the pipeline, a plurality of auxiliary liquid suction branch pipes 9 are commonly connected with an auxiliary liquid suction trunk pipe 11, and the auxiliary liquid suction trunk pipe 11 is communicated with the inlet end of the auxiliary circulating pump 2. Thereby, the plurality of auxiliary liquid suction branch pipes 9 are communicated with the inlet end of the auxiliary circulating pump 2 through the auxiliary liquid suction trunk pipe 11.

Corresponding to the main circulation path, the auxiliary liquid suction branch pipe 9, the auxiliary liquid suction trunk pipe 11, the auxiliary circulation pump 2, the liquid return pipe 10 and the dye vat 1 are constructed to form an auxiliary circulation path. As shown in fig. 1, → is the auxiliary circulation path.

In order to further increase the circulation strength of the dye liquor, the dyeing apparatus may be provided with a plurality of such auxiliary circulation paths. In addition, in order to improve the uniformity of the circulating force of the dye liquor, a plurality of sets of auxiliary circulating paths are uniformly distributed outside the dye vat 1 along the circumferential direction.

The number of auxiliary suction ports can be set according to the height and volume of the dye vat 1 and the power of the auxiliary circulation pump 2, which is not limited by the present application. Specifically, for example, the higher the dye vat 1, the larger the volume, the higher the power of the auxiliary circulation pump 2, the more the number of auxiliary liquid suction ports should be set, and the smaller the distance between adjacent auxiliary liquid suction ports, i.e. the denser the auxiliary liquid suction ports are set along the height direction of the dye vat 1.

The dyeing equipment is debugged before production, and the concentration of the dye liquor (namely the content of the dye in the dye liquor in unit mass or volume) in different liquid level height areas in the dye vat 1 is detected through sampling. The relevant dye liquor concentration data are used for guiding and judging the dye liquor area needing to be strengthened and circulated when the dyeing equipment works. By opening the auxiliary liquid suction valve 901 corresponding to the corresponding height region, the dye liquid in the corresponding height region circulates in the auxiliary circulating path under the action of the auxiliary circulating pump 2. Therefore, the dye liquor in the height area of the whole dye vat 1 can participate in the auxiliary circulation path through the auxiliary liquid suction port on the corresponding height area, thereby achieving the purpose of homogenizing the dye liquor.

As shown in fig. 2, in the present embodiment, the liquid return port is located below the lowermost auxiliary liquid suction port, and the liquid return port is preferably configured to be at least not higher than the lowermost material 5 to be dyed in the vertical direction. In this way, the dye liquor returned through the liquor return port can penetrate the whole string of the material 5 to be dyed on the dyeing shaft 402 in the process of dyeing after the concentration of the dye liquor is uniform. In addition, the length of the circulation path of the dye liquor can be prolonged as much as possible. Thereby, on the one hand, the circulation sufficiency of the dye liquor can be enhanced, and on the other hand, the dyeing efficiency of the material to be dyed 5 can be improved.

In the present application, the auxiliary circulation path and the main circulation path may be simultaneously opened (as shown in fig. 1). Since the liquid return port is located below the lowermost auxiliary liquid suction port, the liquid return port is closer to the main liquid suction port provided at the bottom of the dye vat 1 than the auxiliary liquid suction port.

In this way, part of the dye liquor returned to the dye vat 1 via the liquor return port can be sucked into the main circulation path again in the vicinity of the main liquor suction port and participate in the circulation again in the main circulation path under the pumping action of the circulation main pump 3. The dye liquor participating in circulation in the main circulation path and the auxiliary circulation path are mutually disturbed and promoted, so that the circulation sufficiency of the dye liquor is enhanced, and the uniformity of the dye liquor is improved.

Since the liquid inlet pipe 7 is provided with the liquid inlet valve 701 for controlling the on-off of the dye liquor, the liquid inlet valve 701 can normally perform the function of on-off liquid inlet or liquid discharge. When feeding liquor, the position of the liquor feed valve 701 should be located upstream of the connection point of the liquor feed pipe 7 and the auxiliary liquor suction trunk pipe 11 in the direction of the liquor flow. And in the drainage process, the position of the liquid inlet valve 701 is located at the downstream of the connection point of the liquid inlet pipe 7 and the auxiliary liquid suction trunk pipe 11 along the drainage direction of the waste dye liquor.

Specifically, the junction of the inlet tube 7 and the primary pipette 8 forms a convergence point 708. The other end, namely the outer end, of the liquid inlet pipe 7 is used for being communicated with an external material cylinder. The inlet valve 701 is located between the convergence point 708 and the end of the inlet pipe 7 for connection to an external cylinder.

Thus, when the dye liquor is fed into the dye vat 1 through the feed pipe 7, the feed valve 701 is located upstream of the convergence point 708 of the feed pipe 7 and the main pipette 8 in the direction of the dye liquor flow. So that the liquid inlet valve 701 can only control the on-off of the liquid inlet pipe 7, and the on-off of the main liquid suction pipe 8 is not influenced.

Similarly, when the waste dye liquor is discharged through the liquid inlet pipe 7 (which is a liquid discharge pipe at this time) after the completion of dyeing, the liquid inlet valve 701 is located downstream of the convergence point 708 of the liquid inlet pipe 7 and the main pipette 8 in the discharge direction of the waste dye liquor. In this way, the inlet valve 701 can also only control the on-off of the inlet pipe 7, without affecting the on-off of the main pipette 8.

Through the intensive structural design of the pipelines, the communication between the liquid inlet pipe 7, the main liquid suction pipe 8 and the inlet end of the circulating main pump 3 can be realized simultaneously.

Of course, the manner of communication between the intake pipe 7, the main suction pipe 8 and the inlet end of the circulating main pump 3 is not limited to the above-described embodiment. In another possible embodiment, the above object is also achieved by a three-way joint.

Specifically, the inlet end of the circulating main pump 3 may be connected to a first port of a three-way joint, a second port of the three-way joint is connected to the liquid inlet pipe 7, and a third port is connected to the main pipette 8. In this way, communication of a plurality of pipes with the inlet end of one circulating main pump 3 can also be achieved.

In the above-described embodiment, the main suction valve 801, the auxiliary suction valve 901, the intake valve 701, the auxiliary circulation pump 2, and the circulation main pump 3 may take any suitable existing configuration, and the present application is not limited thereto.

The method of dyeing using the dyeing apparatus according to any one of the above embodiments will be described.

Specifically, fig. 3 is a flowchart of a dyeing method according to a preferred embodiment of the present application. Although the present application provides method operational steps as described in the following embodiments or flowcharts, more or fewer operational steps may be included in the method, either on a routine or non-inventive basis. In addition, in the steps of the method, which logically do not have a necessary causal relationship, the execution order of the steps is not limited to the execution order provided in the embodiment of the present application.

As shown in fig. 3, in a preferred embodiment of the present application, the dyeing method may include the steps of:

step S101: closing all the auxiliary imbibition valves 901, the main imbibition valve 801 and the auxiliary circulating pump 2, opening the liquid inlet valve 701 and the circulating main pump 3, and pumping the dye liquor in the external material cylinder into the dye vat 1 through the liquid inlet pipe 7 and the liquid outlet pipe 6 under the pumping action of the circulating main pump 3;

step S102: when the dye liquor height in the dye vat 1 does not exceed the auxiliary liquid suction port positioned at the lowest part, the main liquid suction valve 801 is opened, and the dye liquor circulates in the main circulation path under the pumping action of the circulating main pump 3;

step S103: when the dye liquor in the dye vat rises to submerge one or more auxiliary liquid suction ports, the concentration of the dye liquor in the areas with different heights in the dye vat 1 is obtained;

step S104: according to the obtained concentration of the dye liquor in different height areas in the dye vat 1, one or more auxiliary liquid suction valves 901 on the auxiliary liquid suction branch pipes 9 corresponding to the designated height areas are opened, and the dye liquor in the designated height areas circulates in the auxiliary circulating path under the pumping action of the auxiliary circulating pump 2.

Before the operation of step S101 is performed, some related preparatory steps may be performed. Specifically, a dye liquor is disposed in an external cylinder. Namely, firstly injecting a non-uniform dyeing medium into an external material cylinder, and then adding dye into the non-uniform dyeing medium in a stepwise manner.

After the dye liquor is prepared, all the auxiliary suction valve 901, the main suction valve 801 and the auxiliary circulating pump 2 are closed, and only the feed valve 701 and the circulating main pump 3 are opened. The dye liquor in the external material cylinder is pumped into the dye vat 1 through the liquor inlet pipe 7 and the liquor outlet pipe 6 in sequence under the pumping action of the circulating main pump 3.

Since the dye liquor does not reach uniform concentration at this time, the creel 4 is not connected with the material 5 to be dyed. In this way, the liquor in the outer vat is pumped into the creel 4 via the outlet pipe 6 and then out into the vat 1 via the liquor outlet hole on the dyeing shaft 402.

In step S102, after the initial injection of the dye liquor, the level of the dye liquor in the dye vat 1 has not reached the lowermost auxiliary suction port. I.e. the liquor occupies only part of the area of the bottom of the vat 1. In this case, the dye solution may be uniformly circulated by using only the main circulation path.

Specifically, the main suction valve 801 is opened, the main circulation path starts to run, and the dye liquor is drawn out from the main suction port under the pumping action of the circulation main pump 3, and returns to the dye vat 1 through the creel 4.

In this embodiment, the auxiliary suction valve 901 may be opened manually, by a control system of the dyeing apparatus, or automatically by a control device based on the dye liquor concentration data, which is not limited in the present application.

In particular, in one embodiment, a concentration monitor or a concentration sensor may be provided inside the dye vat 1 in correspondence of each auxiliary pipetting branch 9. The concentration monitor or concentration sensor is signally connected to a control device (not shown) which is in turn signally connected to the auxiliary suction valve 901 (the auxiliary suction valve 901 may be a solenoid valve which can be automatically controlled). Once the concentration monitor detects that the concentration of the dye liquor in the corresponding height area is too high or too low, or the difference value of the dye liquor concentrations in the two different height areas is larger than a preset threshold value, the control device can be triggered to open the auxiliary liquid suction valve 901.

In this embodiment, the control means may be implemented in any suitable way. In particular, for example, the control means may take the form of, for example, a microprocessor or processor and a computer readable medium storing computer readable program code (e.g., software or firmware) executable by the microprocessor or processor, logic gates, switches, application specific integrated circuits (Application Specific Integrated Circuit, ASIC), programmable logic controllers (Programmable Logic Controller, PLC) and embedded micro control units (Microcontroller Unit, MCU), examples of which include, but are not limited to, the following micro control units: ARC 625D, atmel AT91SAM, microchip PIC18F26K20, silicone Labs C8051F320. It will also be appreciated by those skilled in the art that the control unit can be implemented entirely by logic programming method steps to cause the control unit to be implemented as logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded micro control units, etc., in addition to the functionality of the control means being implemented as pure computer readable program code.

When the main circulation path is started, the liquid inlet valve 701 is not closed, and the dye liquor is continuously injected. As the liquor is continuously injected, the liquid level in the dye vat 1 increases and the liquor volume increases. To the level of the liquor in the vat 1, reaching or flooding one or several auxiliary suction openings. At this time, the dye liquor concentration detection operation of step S103 can be performed.

Once the concentration of the dye liquor in each height area in the dye vat 1 has a large difference, the dye liquor in each height area in the dye vat 1 cannot be directly and uniformly mixed through the main circulation path. At this time, the operation of step S104 may be performed, and the auxiliary suction valve 901 corresponding to the designated height region is opened, so that the auxiliary circulation path also starts to run, and the dye liquor in the designated height region uniformly participates in the circulation of the auxiliary circulation path.

After the liquor in the vat 1 rises to a predetermined level (above the uppermost auxiliary suction port, but below the top wall of the vat 1), the feed valve 701 is closed. But main suction valve 801 may not be closed. The auxiliary suction valves 901 on the plurality of auxiliary suction branch pipes 9 are selectively opened and closed according to the mixing condition of the dye liquor in the dye vat 1, and the dye liquor in each height area of the dye vat 1 is controlled to uniformly circulate in the main circulation path and the auxiliary circulation path (as shown in fig. 1).

After the dye liquor circulates uniformly in the main circulation path and the auxiliary circulation path for a predetermined time, the dye liquor concentration in each height area in the dye vat 1 is detected again. When the detection result shows that the concentration of the dye liquor in the dye vat 1 is uniform, the material 5 to be dyed can be arranged on the creel 4 in series. Subsequently, the dyeing operation of the material 5 to be dyed can be performed.

In step S104, the auxiliary suction valve 901 is opened in the manner described above, and will not be described herein.

As shown in fig. 2, in one embodiment, the main suction valve 801 is not closed when the operation of step S104 is performed, i.e., when the auxiliary suction valve 901 on one or several auxiliary suction branch pipes 9 corresponding to the designated height region is opened.

Thus, the auxiliary circulation path and the main circulation path are simultaneously opened. Thus, part of the dye liquor returned to the dye vat 1 through the liquor return port is sucked again into the main circulation path in the vicinity of the main liquor suction port, and circulates in the main circulation path by the pumping action of the circulating main pump 3. The dye liquor participating in circulation in the main circulation path and the auxiliary circulation path are mutually disturbed and promoted, so that the circulation sufficiency of the dye liquor is enhanced, and the uniformity of the dye liquor is improved.

After the dyeing is completed, liquid is discharged through a main liquid suction port at the bottom of the dye vat 1. Specifically, all auxiliary suction valves 901 are closed, the main suction valve 801 and the feed valve 701 are opened, and the circulating main pump 3 is reversed, so that the waste dye liquor in the dye vat 1 is discharged through the main suction pipe 8 and the feed pipe 7 in sequence.

After the waste dye liquor in the dye vat 1 is emptied, the main liquor suction valve 801 is closed, all the auxiliary liquor suction valves 901 are opened, and the residual waste dye liquor in each auxiliary liquor suction branch pipe 9 is evacuated.

According to the dyeing equipment and the dyeing method provided by the embodiment of the application, the side wall of the dye vat 1 is provided with the plurality of auxiliary liquid suction ports positioned at different height positions and the liquid return ports communicated with the plurality of auxiliary liquid suction ports through the auxiliary circulating pump 2, so that the dye liquor in the different height regions in the dye vat 1 can be controlled to participate in the internal circulation of the dye vat 1 and the creel 4 under the action of the auxiliary circulating pump 2 by opening and closing the auxiliary liquid suction valves 901 on the auxiliary liquid suction branch pipes 9 corresponding to the different height regions, and further the dye liquor in each designated height region in the dye vat 1 can be fully circulated. Therefore, the circulation of the dye liquor can be enhanced, so that the dye liquor is circulated more fully, the purpose of uniform dyeing is achieved, and the dye is more suitable for application of the dye in a non-uniform dyeing medium.

It should be noted that, in the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and to distinguish between similar objects, and there is no order of preference between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated herein by reference for the purpose of completeness. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to forego such subject matter, nor should the applicant be deemed to have such subject matter not considered to be part of the disclosed subject matter.

Claims

1. Dyeing apparatus capable of enhancing circulation of dye liquor, characterized by comprising:

the inlet end of the auxiliary circulating pump is communicated with the plurality of auxiliary liquid suction branch pipes, and the outlet end of the auxiliary circulating pump is communicated with the liquid return port through a liquid return pipe;

the outlet end of the circulating main pump is communicated with the creel through a liquid outlet pipe, the inlet end of the circulating main pump is communicated with a liquid inlet pipe, and a liquid inlet valve is arranged on the liquid inlet pipe; the bottom of the dye vat is provided with a main liquid suction port, the main liquid suction port is communicated with the inlet end of the circulating main pump through a main liquid suction pipe, and the main liquid suction pipe is provided with a main liquid suction valve;

2. Dyeing apparatus according to claim 1, characterized in that the creel comprises a base and a dyeing shaft arranged on the base for stringing the material to be dyed.

3. Dyeing apparatus according to claim 1, characterized in that a plurality of said auxiliary pipetting branch pipes are connected together with an auxiliary pipetting trunk pipe, said auxiliary pipetting trunk pipe being in communication with the inlet end of said auxiliary circulation pump.

4. Dyeing apparatus according to claim 1, characterized in that the main pipette is connected to the liquid inlet pipe, the junction of the main pipette and the liquid inlet pipe forming a convergence point; the other end of the liquid inlet pipe is used for being communicated with an external material cylinder, and the liquid inlet valve is positioned between the converging point and the end part of the liquid inlet pipe, which is used for being communicated with the external material cylinder.

5. Dyeing apparatus according to claim 1, characterized in that the inlet end of the main circulation pump is connected to a first port of a three-way connection, a second port of the three-way connection is connected to the inlet pipe, and a third port of the three-way connection is connected to the main pipette.

6. Dyeing apparatus capable of enhancing circulation of dye liquor, characterized by comprising: a dye vat, an auxiliary circulating pump and a circulating main pump;

the side wall of the dye vat is provided with a liquid return port and a plurality of auxiliary liquid suction ports positioned at different height positions, each auxiliary liquid suction port is respectively connected with an auxiliary liquid suction branch pipe, each auxiliary liquid suction branch pipe is respectively provided with an auxiliary liquid suction valve, and a plurality of auxiliary liquid suction branch pipes are commonly connected with an auxiliary liquid suction trunk pipe; the liquid return port is configured to be at least not higher than the lowest material to be dyed in the vertical direction;

7. A method of dyeing with the dyeing apparatus of claim 6, comprising:

8. A dyeing method according to claim 7, wherein the dyeing process is carried out,

the creel comprises a base and a dyeing shaft which is arranged on the base and used for stringing materials to be dyed;