A high thixotropic ink production stirring device

Abstract

The application provides a high thixotropy ink production stirring device, which comprises a dispersion part, a power part, a stirring shaft, a paddle part and a reaction kettle. The bottom of the reaction kettle is provided with a discharge port, and the reaction kettle is provided with ink to be stirred. The power part is arranged above the reaction kettle. One end of the stirring shaft is connected with the power output end of the power part, and the stirring shaft extends into the reaction kettle. The paddle part is arranged on the stirring shaft, and the paddle part is used for stirring the materials in the reaction kettle. The dispersion part is arranged on the stirring shaft below the paddle part. The high thixotropy ink production stirring device provided by the application simultaneously arranges the paddle part and the dispersion part, fully stirs the ink by the paddle part, reduces the viscosity of the ink, expands the action range of the dispersion disc to the edge of the reaction kettle, and then uniformly disperses the high thixotropy resin, thereby improving the quality of the prepared ink.

Description

Technical Field

[0001] This invention relates to the field of ink production, and more particularly to a stirring apparatus for producing highly thixotropic ink. Background Technology

[0002] In traditional ink production, when ink and water are stirred in a reactor, the ink, being a Newtonian fluid, typically decreases in viscosity upon heating, allowing for thorough mixing using a paddle agitator. However, in the production of highly thixotropic inks, the inherent characteristics of the ink system prevent it from being heated to very high temperatures. Furthermore, the ink exhibits high thixotropy (the property of an substance (such as paint or coating) to change consistency upon shearing, either decreasing or increasing in viscosity upon cessation of shearing). Using a conventional paddle agitator fails to adequately disperse the highly thixotropic resin, resulting in poor ink quality. While traditional dispersion discs can be used, their smaller diameter compared to the reactor diameter leads to insufficient dispersion in certain areas (edges), especially when the highly thixotropic ink is stationary and has a higher viscosity. The ink at the reactor edges remains largely still, preventing the dispersion disc from reaching these areas, resulting in uneven dispersion of the highly thixotropic resin and consequently, poor ink quality. Summary of the Invention

[0003] The purpose of this invention is to provide a stirring device for producing high thixotropic ink, which solves the technical problem that traditional stirring devices, which simply use stirring paddles or dispersing discs to stir ink water, cannot fully disperse the high thixotropic resin evenly, resulting in poor ink quality.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a stirring device for producing highly thixotropic ink, comprising:

[0005] A reaction vessel, wherein a discharge port is provided at the bottom of the reaction vessel, and the reaction vessel is filled with ink to be stirred;

[0006] A power unit is located above the reactor.

[0007] A stirring shaft, one end of which is connected to the power output end of the power unit, extends into the reaction vessel;

[0008] The impeller is mounted on the stirring shaft and is used to stir the materials in the reactor.

[0009] A dispersion section is provided on the stirring shaft below the impeller section.

[0010] In one embodiment, the high thixotropic ink production stirring device further includes a lifting unit, which includes a frame, a lifting hydraulic cylinder, and a lifting mounting platform. The frame is provided with a slide rail, and the lifting mounting platform is slidably fitted on the slide rail. The power unit is mounted on the lifting mounting platform, and the lifting hydraulic cylinder is fixed to the frame. The telescopic rod of the lifting hydraulic cylinder is connected to the lifting mounting platform.

[0011] In one embodiment, the high thixotropic ink production stirring device further includes a pressure measuring unit, which is disposed at the bottom of the stirring shaft and electrically connected to the power unit. The pressure measuring unit is used to measure the depth of the stirring shaft and control the rotation speed of the power unit according to the measured depth.

[0012] In one embodiment, the blade portion includes:

[0013] Fixed blades, the fixed blades being fixed to the stirring shaft;

[0014] An automatically adjusting blade, one end of which is hinged to the end of the fixed blade.

[0015] In one embodiment, the dispersion portion includes:

[0016] A limiting ring is fixed to the stirring shaft, and the limiting ring is provided with a plurality of sliding grooves, which are arranged along the axial direction of the stirring shaft;

[0017] The upper half of the dispersion disk is sleeved on the limiting ring and is slidably fitted in the groove of the limiting ring. The upper half of the dispersion disk is provided with a plurality of dispersion plates.

[0018] The lower half-dispersion disk is fixed on the stirring shaft. The lower half-dispersion disk is provided with a plurality of dispersion plates, and the dispersion plates of the upper half-dispersion disk face opposite directions to the dispersion plates of the lower half-dispersion disk.

[0019] A connecting rope is provided, one end of which is connected to the automatic adjusting paddle, and the other end of which is connected to the upper half-dispersion disc.

[0020] Both the upper and lower half-dispersion discs rotate as the stirring shaft rotates.

[0021] In one embodiment, the limiting ring includes a sliding sleeve, an upper retaining ring, and a lower retaining ring. The sliding sleeve is sleeved and fixed on the stirring shaft, the sliding groove is disposed on the sliding sleeve, the upper retaining ring is disposed at the top of the sliding sleeve, and the lower retaining ring is disposed at the bottom of the sliding sleeve.

[0022] In one embodiment, the upper half of the dispersion disk includes a disk body with dispersion holes arranged in a ring around the center. The edge of the disk body is provided with a plurality of upwardly protruding first dispersion plates, and the bottom of the disk body near the dispersion holes is provided with a plurality of downwardly protruding second dispersion plates.

[0023] In one embodiment, both the first dispersion sheet and the second dispersion sheet are hinged to the disc body, and an elastic element is provided between the first dispersion sheet and the disc body, and the same elastic element is provided between the second dispersion sheet and the disc body.

[0024] In one embodiment, the power unit is a continuously variable speed motor.

[0025] The above-described technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0026] The high thixotropic ink production stirring apparatus provided in this invention employs a power-driven stirring shaft, which rotates to drive the impeller and dispersion section. The rotating impeller (with relatively long blades, the length of which is 80-90% of the reactor diameter) thoroughly mixes and agitates the high thixotropic ink. Due to the long blades, ink at the reactor edge is also stirred, significantly reducing the viscosity of the high thixotropic ink. The thoroughly stirred high thixotropic ink is then dispersed by a rotating dispersion disc below. Because the ink at the reactor edge has already been significantly reduced in viscosity by the impeller agitation, the dispersion disc's effective range can be extended to the reactor edge, resulting in uniform dispersion of the high thixotropic resin and improved ink quality. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the stirring device for producing modified ink provided in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the blade and the dispersion section in a static state according to an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of the structure of the blade and the dispersion section in a rotating state according to an embodiment of the present invention;

[0031] Figure 4 for Figure 2 Cross-sectional view at point AA;

[0032] Figure 5 This is a schematic diagram of the structure of the dispersion disk provided in an embodiment of the present invention.

[0033] The labels for the various figures are as follows:

[0034] 1. Reactor; 2. Power unit; 3. Stirring shaft; 4. Paddle section; 5. Dispersion section; 6. Pressure measuring section; 11. Discharge port; 41. Fixed paddle; 42. Automatically adjusting paddle; 51. Limiting ring; 52. Upper half-dispersion disc; 53. Lower half-dispersion disc; 54. Connecting rope; 521. Disc body; 522. Dispersion hole; 523. First dispersion plate; 524. Second dispersion plate; 525. Elastic element; 526. Dispersion plate. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Please see Figure 1 This application provides a stirring device for producing high thixotropic ink, including a dispersion section 5, a power unit 2, a stirring shaft 3, a paddle section 4, and a reaction vessel 1. The reaction vessel 1 (which may be a cylindrical barrel-shaped object) has a discharge port 11 at its bottom (a valve may be installed on the discharge port 11 to discharge the produced high thixotropic ink). The reaction vessel 1 contains ink to be stirred. The power unit 2 (which may be a continuously variable speed motor) is positioned above the reaction vessel 1. One end of the stirring shaft 3 is connected to the power output end of the power unit 2, and the stirring shaft 3 extends into the reaction vessel 1. The paddle section 4 is mounted on the stirring shaft 3 and is used to stir the material inside the reaction vessel 1. The dispersion section 5 is positioned on the stirring shaft 3 below the paddle section 4 (the dispersion section 5 includes at least one dispersion disc, which may be a disc-shaped metal structure).

[0040] The high thixotropic ink production stirring apparatus provided in this embodiment uses a power-driven stirring shaft 3 to rotate, thereby driving the paddle section 4 and the dispersion section 5 to rotate. The rotation of the paddle section 4 (the paddle section 4 has a relatively long blade, with a length of 80-90% of the diameter of the reactor 1) thoroughly mixes and agitates the high thixotropic ink. Due to the long length of the paddle section 4, the ink at the edge of the reactor 1 is also stirred by the paddle section 4, resulting in a significant reduction in the viscosity of the high thixotropic ink. The thoroughly stirred high thixotropic ink is then dispersed by a rotating dispersion disc below. Because the ink at the edge of the reactor 1 has already had its viscosity significantly reduced by the stirring of the paddle section 4, the effective range of the dispersion disc can be expanded to the edge of the reactor 1, thereby ensuring uniform dispersion of the high thixotropic resin and improving the quality of the produced ink.

[0041] In one embodiment, the high thixotropic ink production stirring device further includes a lifting unit, which comprises a frame, a lifting hydraulic cylinder, and a lifting mounting platform. A slide rail is provided on the frame, and the lifting mounting platform is slidably fitted onto the slide rail. The power unit 2 is mounted on the lifting mounting platform, and the lifting hydraulic cylinder is fixed to the frame. The extension rod of the lifting hydraulic cylinder is connected to the lifting mounting platform. By providing the lifting unit, the power unit 2, along with the stirring shaft 3, the impeller 4, and the dispersing section 5, can all be adjusted vertically, thereby adjusting the working depth of the impeller 4 and the dispersing section 5 to meet different stirring requirements.

[0042] In one embodiment, the high thixotropic ink production stirring device further includes a pressure measuring unit 6, which is located at the bottom of the stirring shaft 3 and electrically connected to the power unit 2. The pressure measuring unit 6 is used to measure the depth of the stirring shaft 3 and control the rotation speed of the power unit 2 based on the measured depth. Specifically, the pressure measuring unit 6 can be a pressure sensor. By measuring the pressure at the location of the pressure measuring unit 6, the depth of the paddle section 4 and the dispersion section 5 can be determined, and the output rotation speed of the power unit 2 can be intelligently adjusted based on the depth of the paddle section 4 and the dispersion section 5. This avoids the phenomenon that when the ink volume in the reactor 1 is low, the paddle section 4 and the dispersion section 5 are close to the liquid surface, and the stirring shaft 3 rotates too fast, causing ink splashing and mixing in a large amount of air, increasing power consumption (idling increases power consumption) and reducing dispersion efficiency.

[0043] In one embodiment, the impeller section 4 includes an automatically adjusting impeller 42 and a fixed impeller 41. The fixed impeller 41 is fixed to the stirring shaft 3; one end of the automatically adjusting impeller 42 is hinged to the end of the fixed impeller 41. By hinged the automatically adjusting impeller 42 to the end of the fixed impeller 41, when the power unit 2 drives the stirring shaft 3 to rotate, the stirring shaft 3 drives the automatically adjusting impeller 42 and the fixed impeller 41 to rotate. Due to the centrifugal force experienced by the automatically adjusting impeller 42 during rotation, the automatically adjusting impeller 42 rotates upwards by a certain angle around its hinge point (as shown in the attached figure). Figure 2 - Appendix Figure 3 The aforementioned mechanism causes the tilt angle of the automatically adjusting impeller 42 to change, thereby expanding the effective stirring range of the stirring shaft 3. Consequently, the faster the rotational speed of the impeller 4, the larger its effective stirring range, further improving its stirring efficiency and facilitating subsequent dispersion by the dispersion disc. In conjunction with the pressure measuring unit 6 controlling the rotational speed of the impeller 4, the impeller 4 automatically changes its shape when at different liquid levels, further enhancing stirring efficiency.

[0044] Furthermore, when the impeller 4 needs to extend into a reactor 1 with a narrow inlet and a large internal diameter, the impeller 4 is in a stationary state (as shown in the attached figure). Figure 2When the automatic adjustment blade 42 is folded down, it is easier to pass through the narrow inlet. When the blade part 4 enters the interior of the reactor 1, the blade part 4 rotates and unfolds at the same time to facilitate thorough stirring inside the reactor 1 (including the edge area).

[0045] In one embodiment, the dispersing unit 5 includes a connecting rope 54 (which may be a metal wire, such as steel wire), an upper dispersing disc 52, a lower dispersing disc 53, and a limiting ring 51. The limiting ring 51 is fixed to the stirring shaft 3 and has several grooves arranged along the axial direction of the stirring shaft 3. The upper dispersing disc 52 is fitted onto the limiting ring 51 and slidably fits within the grooves of the limiting ring 51. The upper dispersing disc 52 has several dispersing plates 526. The lower dispersing disc 53 is fixed to the stirring shaft 3 and has several dispersing plates 526, with the dispersing plates 526 of the upper and lower dispersing discs facing opposite directions. One end of the connecting rope 54 is connected to an automatic adjusting blade 42, and the other end is connected to the upper dispersing disc 52. Both the upper and lower dispersing discs 52 and 53 rotate with the stirring shaft 3.

[0046] When the power unit 2 drives the stirring shaft 3 to rotate, the automatic adjusting blade 42 inside the blade section 4 rotates upward at a certain angle under the action of centrifugal force. The upward rotating automatic adjusting blade 42 pulls the upper semi-dispersion disk 52, causing the upper semi-dispersion disk 52 to move upward (by the attached...). Figure 2 The position shown moves to the attached Figure 3 As shown in the diagram, the distance between the upper half-dispersion disk 52 and the lower half-dispersion disk 53 increases (and the greater the rotational speed of the stirring shaft 3, the greater the distance between them). During dispersion, the highly thixotropic resin is dispersed by the up-and-down tumbling circulation generated by the rotation of the opposing dispersion plates 526 on the upper half-dispersion disk 52 and the lower half-dispersion disk 53 (the turbine diameter range is related to the distance between the upper half-dispersion disk 52 and the lower half-dispersion disk 53). Furthermore, the faster the dispersion plates 526 move, the faster the generated circulation speed. Therefore, as the rotational speed of the stirring shaft 3 increases, the distance between the upper half-dispersion disk 52 and the lower half-dispersion disk 53 increases, resulting in a larger turbine diameter range, which in turn expands the dispersion range (vertical range) of the dispersion section 5, thereby significantly improving the dispersion effect of the dispersion section 5.

[0047] Furthermore, the rotation speed is adjusted by the pressure measuring unit 6, and the rotation speed can be adjusted according to the ink depth at the location of the dispersion unit 5, thereby adjusting the amount of upward movement of the upper half dispersion disk 52, thus avoiding the upper half dispersion disk 52 being exposed to the ink surface due to excessive upward movement caused by the stirring shaft 3 rotating too fast.

[0048] In one embodiment, the limiting ring 51 includes a sliding sleeve, an upper retaining ring, and a lower retaining ring. The sliding sleeve is fitted and fixed onto the stirring shaft 3, a sliding groove is provided on the sliding sleeve, the upper retaining ring is provided at the top of the sliding sleeve, and the lower retaining ring is provided at the bottom of the sliding sleeve. The limiting ring 51 is used to allow the upper half-dispersion disk 52 to rotate synchronously with the stirring shaft 3, and also to move up and down along the axis of the stirring shaft 3. When the stirring shaft 3 is stationary, the upper half-dispersion disk 52 abuts against the lower retaining ring. The lower retaining ring prevents the upper half-dispersion disk 52 from sliding down, while the upper retaining ring is used to limit the maximum upward sliding of the upper half-dispersion disk 52, preventing the gap between the upper half-dispersion disk 52 and the lower half-dispersion disk 53 from being too large.

[0049] In one embodiment, the upper dispersion disk 52 includes a disk body 521, on which dispersion holes 522 are arranged in a ring around the center. The edge of the disk body 521 has several upward-protruding first dispersion plates 523, and the bottom of the disk body 521 near the dispersion holes 522 has several downward-protruding second dispersion plates 524. By providing the first dispersion plates 523 and second dispersion plates 524 with opposite directions on the disk body 521, the dispersion effect of the upper dispersion disk 52 is significantly improved.

[0050] In one embodiment, both the first dispersion piece 523 and the second dispersion piece 524 are hinged to the disc body 521. An elastic element 525 (such as a spring, sheet, etc.) is provided between the first dispersion piece 523 and the disc body 521, and an elastic element 525 is also provided between the second dispersion piece 524 and the disc body 521.

[0051] When the upper half-dispersion disk 52 rotates, the first dispersion plate 523 and the second dispersion plate 524 are subjected to centrifugal force. Under the action of this centrifugal force, the first dispersion plate 523 and the second dispersion plate 524 overcome the elastic force of the elastic member 525 and cause their angles to change (expand outward), thereby increasing the horizontal projected area of ​​the upper half-dispersion disk 52, thereby increasing the effective dispersion range of the upper half-dispersion disk 52 in the horizontal direction and improving the dispersion effect of the upper half-dispersion disk 52.

[0052] Furthermore, since the second dispersing plate 524 is located near the dispersing hole 522 (during the dispersion process, the ink liquid will flow through the dispersing hole 522 to form a circulation), when the second dispersing plate 524 expands in a rotating manner, the aperture of the dispersing hole 522 will decrease accordingly, resulting in a faster flow rate of the ink liquid through the dispersing hole 522, which in turn increases the speed of the formed circulation, thereby increasing the diameter of the circulation and further improving the dispersion effect of the upper half dispersing disk 52.

[0053] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A stirring apparatus for producing highly thixotropic ink, characterized in that, The high thixotropic ink production stirring device includes: A reaction vessel, wherein a discharge port is provided at the bottom of the reaction vessel, and the reaction vessel is filled with ink to be stirred; A power unit is located above the reactor. A stirring shaft, one end of which is connected to the power output end of the power unit, extends into the reaction vessel; The impeller is mounted on the stirring shaft and is used to stir the materials in the reactor. A dispersion section is disposed on the stirring shaft below the impeller section; The high thixotropic ink production stirring device also includes a pressure measuring unit, which is located at the bottom of the stirring shaft and electrically connected to the power unit. The pressure measuring unit is used to measure the depth of the stirring shaft and control the rotation speed of the power unit according to the measured depth. The blade section includes: Fixed blades, the fixed blades being fixed to the stirring shaft; An automatically adjusting blade, one end of which is hinged to the end of the fixed blade; The dispersion portion includes: A limiting ring is fixed to the stirring shaft, and the limiting ring is provided with a plurality of sliding grooves, which are arranged along the axial direction of the stirring shaft; The upper half of the dispersion disk is sleeved on the limiting ring and is slidably fitted in the groove of the limiting ring. The upper half of the dispersion disk is provided with a plurality of dispersion plates. The lower half-dispersion disk is fixed on the stirring shaft. The lower half-dispersion disk is provided with a plurality of dispersion plates, and the dispersion plates of the upper half-dispersion disk face opposite directions to the dispersion plates of the lower half-dispersion disk. A connecting rope is provided, one end of which is connected to the automatic adjusting paddle, and the other end of which is connected to the upper half-dispersion disc. Both the upper and lower half-dispersion discs rotate as the stirring shaft rotates.

2. The stirring apparatus for producing highly thixotropic ink according to claim 1, characterized in that: The high thixotropic ink production stirring device also includes a lifting unit, which includes a frame, a lifting hydraulic cylinder, and a lifting mounting platform. The frame is provided with a slide rail, and the lifting mounting platform is slidably fitted on the slide rail. The power unit is installed on the lifting mounting platform, and the lifting hydraulic cylinder is fixed to the frame. The telescopic rod of the lifting hydraulic cylinder is connected to the lifting mounting platform.

3. The stirring apparatus for producing highly thixotropic ink according to claim 1, characterized in that: The limiting ring includes a sliding sleeve, an upper stop ring, and a lower stop ring. The sliding sleeve is sleeved and fixed on the stirring shaft. The sliding groove is disposed on the sliding sleeve. The upper stop ring is disposed at the top of the sliding sleeve, and the lower stop ring is disposed at the bottom of the sliding sleeve.

4. The stirring apparatus for producing highly thixotropic ink according to claim 1, characterized in that: The upper half of the dispersion disk includes a disk body, on which dispersion holes are arranged in a ring around the center. The edge of the disk body is provided with a number of upward-protruding first dispersion plates, and the bottom of the disk body is provided with a number of downward-protruding second dispersion plates near the dispersion holes.

5. The stirring apparatus for producing high thixotropic ink according to claim 4, characterized in that: Both the first dispersion plate and the second dispersion plate are hinged to the disc body. An elastic element is provided between the first dispersion plate and the disc body, and the same elastic element is provided between the second dispersion plate and the disc body.

6. The stirring apparatus for producing highly thixotropic ink according to claim 1, characterized in that: The power unit is a continuously variable speed motor.

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