A paper pulp mixing and stirring device for papermaking and a stirring method thereof

Abstract

This invention relates to the field of pulp mixing and agitation, and discloses a pulp mixing and agitation device for papermaking, including a frame, a mixing tank and a motor for driving the mixing tank to rotate on the frame, the mixing tank having openings at both ends and a tank cover, the tank cover and the frame being fixed and rotatingly engaged with the mixing tank, side blades extending from the inner wall of the mixing tank, and an agitator being disposed inside the mixing tank, the agitator being located below the axis of the mixing tank, the agitator being configured to switch between a mixing state and a stop state, in the mixing state, the agitator blades extending out and agitating the pulp, in the stop state, the agitator blades retracting into the agitator; this solution uses the rotation of the side blades to agitate the pulp material in the mixing tank, so that all parts of the pulp material can be agitated by the agitator, and the agitator agitates the pulp material by the revolution and rotation of the agitator blades, resulting in better agitation effect.

Description

Technical Field

[0001] This invention relates to the field of papermaking, and more specifically to the field of pulp mixing and stirring. Background Technology

[0002] Pulp is an important raw material for papermaking. It is a fibrous substance made from plant fibers through different processing methods. The quality of pulp is mainly determined by its fiber morphology and the purity of the fibers.

[0003] Mixing is an important step in pulp processing. In existing technologies, a mixer is generally used to mix the pulp. Most mixers use a motor to drive the mixing blades to rotate and mix the pulp. However, there are some shortcomings, such as a relatively simple structure, relatively poor mixing efficiency and effect, and the pulp is prone to sedimentation during the mixing process. Furthermore, the pulp raw material is rich in fiber, which can easily become entangled on the mixing blades. After mixing, the mixing blades need to be cleaned, which is quite cumbersome.

[0004] Based on the above, the present invention proposes a pulp mixing and stirring device and a stirring method for papermaking. Summary of the Invention

[0005] To address the problems mentioned in the background above, the present invention provides a pulp mixing and stirring device and a stirring method for papermaking.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows.

[0007] A pulp mixing and stirring device for papermaking includes a frame, on which a horizontally arranged mixing tank and a motor for driving the mixing tank to rotate are mounted. The mixing tank has openings at both ends and is provided with a tank cover. The tank cover and the frame are fixed together, and the tank cover and the mixing tank are rotatably engaged. Side blades extend from the inner wall of the mixing tank. A stirring component is provided inside the mixing tank and is located below the axis of the mixing tank. The stirring component is configured to switch between a stirring state and a stop state. When in the stirring state, the stirring blades of the stirring component extend and stir the pulp. When in the stop state, the stirring blades retract into the stirring component.

[0008] Furthermore, the can lid is provided with a feed hole, the opening of which extends into a feed pipe, and a feed hopper is provided at the end of the feed pipe, which is equipped with a control valve.

[0009] Furthermore, a casing is installed on the frame. The casing is coaxially fitted outside the mixing tank, and a notch is opened at the highest point of the casing and a discharge hole is opened at the lowest point. A guide pipe extends downward from the opening of the discharge hole.

[0010] The outer surface of the mixing tank is provided with a discharge nozzle, and the end of the discharge nozzle is provided with a screw cap.

[0011] Furthermore, the tank lid is provided with a connection hole and the connection holes on the two tank lids are coaxial. The stirring component includes a mounting column coaxially disposed between the two connection holes and a motor for driving the mounting column to rotate.

[0012] The mounting column is arrayed with several sets of stirring units. The outer circular surface of the mounting column is radially provided with mounting grooves, and the stirring units are placed in the mounting grooves.

[0013] Furthermore, the stirring unit includes a first mounting shell and a second mounting shell fitted inside the mounting groove. The first mounting shell is close to the bottom of the mounting groove, and the first mounting shell and the second mounting shell are coaxially connected.

[0014] The outer circular surface of the second mounting shell has a sliding hole along the radial direction. An agitator is slidably installed inside the second mounting shell. Initially, one end of the agitator is located in the sliding hole, and the other end is provided with a step. A spring is provided between the step and the inner wall of the second mounting shell. The elastic force of the spring is used to drive the agitator to retract and move the second mounting shell.

[0015] Furthermore, the end face of the mounting column is coaxially provided with a core hole, and the mounting groove and the core hole are connected through a mounting hole. A drive shaft is installed in the mounting hole. The drive shaft is coaxial with the mounting groove and its output end extends into the mounting housing and is provided with a fixed support.

[0016] A movable support is mounted on the outside of the drive shaft via a spline. When the movable support moves, the drive shaft continuously outputs power to the movable support via the spline. The movable support is connected to the mounting housing one, and a spring two is provided between the movable support and the fixed support.

[0017] The stirring unit also includes a counterweight block located inside the mounting housing. Two connecting rods are hinged to the side of the counterweight block facing the drive shaft. The end of one connecting rod is hinged to a fixed support, and the end of the other connecting rod is hinged to a movable support.

[0018] Furthermore, a mandrel is coaxially mounted inside the core hole. The mandrel is rotated by a motor driven at the end of the mounting post. The input end of the drive shaft is connected to the mandrel through a power transmission component.

[0019] A mixing method for a pulp mixing and stirring device used in papermaking:

[0020] Step 1: Add the pulp raw materials into the mixing tank;

[0021] Step 2: Motor 1, Motor 2, and Motor 3 start simultaneously. Motor 1 drives the mixing tank to rotate, Motor 2 drives the mounting column and mixing unit to rotate together, and Motor 3 drives the drive shaft to rotate through the spindle and power transmission components. The rotation of the drive shaft will cause Mounting Housing 1, Mounting Housing 2, and the counterweight to rotate together. When the counterweight rotates, under the action of centrifugal force, the counterweight will move away from the drive shaft. When the counterweight moves, it will drive the movable support away from the bottom of the mounting groove through the connecting rod. Spring 2 is compressed, and the movable support moves with Mounting Housing 2, causing the mixing unit to extend out of the mounting groove.

[0022] Then, under the action of centrifugal force, the stirring blade extends out of the second mounting shell through the sliding hole, and the first spring is compressed. At this time, the stirring component switches to the stirring state. The pulp raw material is stirred by the revolution of the stirring blade around the axis of the mounting column plus the rotation of the stirring blade around the axis of the drive shaft.

[0023] Step 3: After the stirring is completed, motors 1, 2 and 3 stop running. Under the elastic force of springs 1 and 2, the stirring blades retract into the mounting shell 2, and mounting shells 1 and 2 retract into the mounting groove. That is, the stirring unit retracts into the mounting groove, and the stirring components switch to the stop state.

[0024] Compared with the prior art, the beneficial effects of this invention are as follows:

[0025] I. This solution uses the rotation of the side blades to agitate the pulp raw materials in the mixing tank, so that all parts of the pulp raw materials can be agitated by the mixing components. The mixing components agitate the pulp raw materials by the revolution of the mixing blades around the center line of the mounting column and the rotation of the mixing blades around the center line of the drive shaft. The combination of the two can effectively improve the mixing effect and mixing efficiency.

[0026] 2. In this solution, the stirring component is set to switch between stirring state and stop state. After stirring is completed, the stirring component switches to the stop state, the stirring blade retracts into the second mounting shell, and the stirring unit retracts into the mounting groove. During the retraction process, the stirring blade can be scraped by the wall of the sliding hole, and the first and second mounting shells can be scraped by the wall of the mounting groove, so that no fibers remain on the outer surface of the stirring unit, achieving a self-cleaning effect.

[0027] In addition, in this solution, the state switching of the stirring component relies on centrifugal force. The advantage of this is that the state switching can be achieved by utilizing the rotation of the stirring blades, without the need for an additional power source, resulting in a simpler structure and lower energy consumption. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2This is a schematic diagram of the mixing tank and the mixing components in the stopped state;

[0030] Figure 3 This is a schematic diagram of the mixing tank and the mixing components in the mixing process;

[0031] Figure 4 This is a schematic diagram of the stirring components;

[0032] Figure 5 This is a cross-sectional view of the stirring component;

[0033] Figure 6 Cross-section of the stirring unit Figure 1 ;

[0034] Figure 7 Cross-section of the stirring unit Figure 2 ;

[0035] Figure 8 This is a schematic diagram of the drive shaft, counterweight, and connecting rod.

[0036] The labels in the attached diagram are:

[0037] 100. Frame; 101. Housing; 102. Guide pipe; 103. Motor 1; 200. Mixing tank; 201. Tank cover; 202. Feed pipe; 203. Feed hopper; 204. Screw cap; 205. Side blade; 300. Mixing component; 301. Motor 2; 302. Motor 3; 303. Mounting column; 304. Mandrel; 305. Mixing unit; 306. Mounting housing 1; 307. Mounting housing 2; 308. Mixing blade; 309. Spring 1; 310. Drive shaft; 311. Power transmission component; 312. Movable support; 313. Fixed support; 314. Spring 2; 315. Counterweight; 316. Connecting rod. Detailed Implementation

[0038] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0039] Reference Figures 1-8A pulp mixing and stirring device for papermaking includes a frame 100, on which a horizontally arranged mixing tank 200 and a motor 103 for driving the mixing tank 200 to rotate are mounted. The mixing tank 200 has openings at both ends and is provided with a tank cover 201. Both tank covers 201 are fixed to the frame 100 and form a rotatable engagement with the mixing tank 200. Each tank cover 201 is provided with a feed hole, and a feed pipe 202 extends from the opening of the feed hole. A feed hopper 203 is provided at the end of the feed pipe 202. A control valve is provided on the feed pipe 202. When the control valve is opened, the pulp raw material is poured into the feed hopper 203, and the pulp raw material will enter the mixing tank 200 through the feed pipe 202.

[0040] Furthermore, a housing 101 is installed on the frame 100. The housing 101 is coaxially fitted on the outside of the mixing tank 200. The housing 101 has a notch at its highest point and a discharge hole at its lowest point. A guide pipe 102 extends downward from the opening of the discharge hole.

[0041] The outer surface of the mixing tank 200 is provided with a discharge nozzle, and the end of the discharge nozzle is provided with a cap 204. The pulp raw materials are mixed by the mixing component 300 provided in the mixing tank 200. After the mixing is completed, the mixing tank 200 is rotated by the motor 103 so that the cap 204 is in the notch. The operator unscrews the cap 204, and then the motor 103 drives the mixing tank 200 to rotate again so that the discharge nozzle is facing the discharge hole. The pulp in the mixing tank 200 is discharged outward through the guide pipe 102. During this process, a small amount of pulp will flow into the housing 101 and flow along the arc-shaped inner wall of the housing 101 towards the guide pipe 102.

[0042] Reference Figure 2 and Figure 3 The mixing tank 200 is equipped with a stirring component 300 for stirring the pulp raw materials inside the mixing tank 200. The stirring component 300 is located below the axis of the mixing tank 200. Side blades 205 extend from the inner wall of the mixing tank 200. When the mixing tank 200 rotates, the side blades 205 not only stir the pulp, but also turn the pulp over. The turning of the pulp can make all parts of the pulp be stirred by the stirring component 300, resulting in a better stirring effect.

[0043] Furthermore, the mixing component 300 is configured to switch between a mixing state and a shutdown state. When in the mixing state, the mixing blades 308 of the mixing component 300 extend and mix the pulp by rotating on their own axis and revolving around the center, resulting in better mixing effect. When in the shutdown state, the mixing blades 308 retract into the mixing component 300. During the retraction process, the fibers on the mixing blades 308 are cleaned off, meaning that no fiber residue will remain on the mixing blades 308.

[0044] Specifically:

[0045] Reference Figure 4 and Figure 5 Two connecting holes are respectively set on the two tank covers 201 and are coaxial. The stirring component 300 includes a mounting column 303 coaxially set between the two connecting holes. The mounting column 303 is driven to rotate by a second motor 301. The second motor 301 can be installed on the tank cover 201 or on the frame 100. A core hole is coaxially opened on the end face of the mounting column 303. A spindle 304 is coaxially installed in the core hole. The spindle 304 is driven to rotate by a third motor 302. The third motor 302 is installed at the end of the mounting column 303 and rotates with the mounting column 303. Therefore, a slip ring is needed for wiring the third motor 302.

[0046] The mounting column 303 is provided with an array of several sets of stirring units 305. Furthermore, the outer circular surface of the mounting column 303 is provided with a mounting groove along the radial direction, and the stirring units 305 are arranged in the mounting groove.

[0047] Reference Figures 6-8 The stirring unit 305 includes a first mounting shell 306 and a second mounting shell 307 fitted into the mounting groove. The first mounting shell 306 is close to the bottom of the mounting groove, and the first mounting shell 306 and the second mounting shell 307 are fixedly connected. Preferably, the end of the second mounting shell 307 away from the bottom of the mounting groove is arc-shaped. When the stirring component 300 is in the stopped state, both the first mounting shell 306 and the second mounting shell 307 are retracted into the mounting groove. At this time, the arc-shaped rotating end of the second mounting shell 307 just blocks the opening of the mounting groove, so that the mounting column 303 as a whole is a complete cylindrical shape.

[0048] The outer circular surface of the second mounting shell 307 is provided with a sliding hole along the radial direction. A stirring blade 308 is slidably disposed inside the second mounting shell 307. Initially, one end of the stirring blade 308 is located in the sliding hole, and the other end is provided with a step. A spring 309 is provided between the step and the inner wall of the second mounting shell 307. The elastic force of the spring 309 is used to drive the stirring blade 308 to retract and move the second mounting shell 307. Preferably, several stirring blades 308 are arranged in an array along the circumferential direction of the second mounting shell 307.

[0049] The mounting slot and the core hole are connected by a mounting hole. A drive shaft 310 is installed in the mounting hole. The drive shaft 310 is coaxial with the mounting slot and its input end is connected to the core shaft 304 by a power transmission component 311. Its output end extends into the mounting housing 306 and is provided with a fixed support 313.

[0050] A movable support 312 is mounted on the outside of the drive shaft 310 via a spline. When the movable support 312 moves, the drive shaft 310 continuously outputs power to the movable support 312 via the spline. The movable support 312 is connected to the mounting housing 306. A spring 314 is provided between the movable support 312 and the fixed support 313.

[0051] The stirring unit 305 also includes a counterweight 315 located inside the mounting housing 306. Several counterweights 315 are arranged in an array along the circumferential direction of the mounting housing 306. Each counterweight 315 has two connecting rods 316 hinged to the side facing the drive shaft 310. The end of one connecting rod 316 is hinged to the fixed support 313, and the end of the other connecting rod 316 is hinged to the movable support 312.

[0052] Working principle of the invention:

[0053] First, the pulp raw material is fed into the mixing tank 200 through the feed hopper 203 and the feed pipe 202;

[0054] Then, motor 103, motor 2 301, and motor 3 302 all start, among which:

[0055] Motor 103 drives the mixing tank 200 to rotate;

[0056] The operation of motor 301 drives the mounting column 303 and the stirring unit 305 to rotate together;

[0057] Motor 302 drives drive shaft 310 to rotate via spindle 304 and power transmission component 311. The rotation of drive shaft 310 causes mounting housing 1 306, mounting housing 2 307, and counterweight 315 to rotate together. When counterweight 315 rotates, under centrifugal force, it moves away from drive shaft 310. Since fixed support 313 is fixed to drive shaft 310, the movement of counterweight 315 drives movable support 312 away from the bottom of mounting groove via connecting rod 316. Spring 2 314 is compressed, and movable support 312 moves along with mounting housing 2 307, causing stirring unit 30... 5. Extending out from the mounting slot, the stirring blade 308, under the action of centrifugal force, extends out from the mounting shell 307 through the sliding hole. The spring 309 is compressed. At this time, the stirring component 300 switches to the stirring state. The pulp raw material is stirred by the revolution of the stirring blade 308 around the axis of the mounting column 303 and the rotation of the stirring blade 308 around the axis of the drive shaft 310. The stirring effect is better. Since the stirring blade 308 extends by centrifugal force, the rotation is a high rotation. It can also cut the fibers in the pulp raw material, making the pulp after stirring and mixing finer and the paper produced is of better quality.

[0058] After the stirring is completed, motor 103, motor 201 and motor 302 stop running. Under the elastic force of spring 1 309 and spring 2 314, stirring blade 308 retracts into mounting shell 2 307, mounting shell 1 306 and mounting shell 2 307 retract into mounting groove, that is, stirring unit 305 retracts into mounting groove, and stirring component 300 switches to the stop state.

[0059] Then, the mixing tank 200 is rotated by motor 103, so that the cap 204 is in the notch. The operator unscrews the cap 204, and then motor 103 drives the mixing tank 200 to rotate again, so that the discharge nozzle is aligned with the discharge hole. The pulp in the mixing tank 200 is discharged outward through the guide pipe 102. During this process, a small amount of pulp will flow into the housing 101 and flow along the arc-shaped inner wall of the housing 101 towards the guide pipe 102. This is a normal phenomenon and will not affect the pulp discharge.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A paper pulp mixing and stirring device for papermaking, comprising a frame (100) on which a horizontally arranged stirring tank (200) and a motor (103) for driving the stirring tank (200) to rotate are installed, characterized in that, The mixing tank (200) has openings at both ends and is provided with a tank cover (201). The tank cover (201) and the frame (100) are fixed. The tank cover (201) and the mixing tank (200) are in a rotating fit. Side blades (205) extend from the inner wall of the mixing tank (200). A mixing component (300) is provided inside the mixing tank (200). The mixing component (300) is located below the axis of the mixing tank (200). The mixing component (300) is configured to switch between a mixing state and a stop state. When in the mixing state, the mixing blades (308) of the mixing component (300) extend and mix the pulp. When in the stop state, the mixing blades (308) retract into the mixing component (300). The can lid (201) is provided with a connection hole and the connection holes on the two can lids (201) are coaxial. The stirring component (300) includes a mounting column (303) coaxially disposed between the two connection holes and a motor (301) for driving the mounting column (303) to rotate. A number of stirring units (305) are arranged in an array on the mounting column (303). The outer circular surface of the mounting column (303) is provided with a mounting groove along the radial direction, and the stirring unit (305) is arranged in the mounting groove. The stirring unit (305) includes a first mounting shell (306) and a second mounting shell (307) fitted into the mounting groove. The first mounting shell (306) is close to the bottom of the mounting groove, and the first mounting shell (306) and the second mounting shell (307) are coaxially connected. The outer circular surface of the second mounting shell (307) is provided with a sliding hole along the radial direction. A stirring blade (308) is slidably arranged inside the second mounting shell (307). Initially, one end of the stirring blade (308) is located in the sliding hole and the other end is provided with a step. A spring (309) is provided between the step and the inner wall of the second mounting shell (307). The elastic force of the spring (309) is used to drive the stirring blade (308) to retract and move the second mounting shell (307). The end face of the mounting post (303) is coaxially provided with a core hole. The mounting groove and the core hole are connected through the mounting hole. A drive shaft (310) is installed in the mounting hole. The drive shaft (310) is coaxial with the mounting groove and its output end extends into the mounting shell (306) and is provided with a fixed support (313). A movable support (312) is installed on the outside of the drive shaft (310) via a spline. When the movable support (312) moves, the drive shaft (310) continuously outputs power to the movable support (312) via the spline. The movable support (312) is connected to the mounting housing (306). A spring (314) is provided between the movable support (312) and the fixed support (313). The stirring unit (305) also includes a counterweight (315) located in the mounting housing (306). The counterweight (315) has two connecting rods (316) hinged on the side facing the drive shaft (310). The end of one connecting rod (316) is hinged to the fixed support (313), and the end of the other connecting rod (316) is hinged to the movable support (312).

2. A pulp mixing and stirring device for papermaking according to claim 1, characterized in that The can lid (201) is provided with a feed hole, and a feed pipe (202) extends from the opening of the feed hole. A feed hopper (203) is provided at the end of the feed pipe (202), and a control valve is provided on the feed pipe (202).

3. A pulp mixing and stirring device for papermaking according to claim 1, characterized in that A casing (101) is installed on the frame (100). The casing (101) is coaxially sleeved on the outside of the mixing tank (200). The casing (101) has a notch at the highest point and a discharge hole at the lowest point. A guide pipe (102) extends downward from the opening of the discharge hole.

4. A pulp mixing and stirring device for papermaking according to claim 3, characterized in that The outer surface of the mixing tank (200) is provided with a discharge nozzle, and the end of the discharge nozzle is provided with a screw cap (204).

5. A pulp mixing and stirring device for papermaking according to claim 1, characterized in that A spindle (304) is coaxially mounted inside the core hole. The spindle (304) is driven to rotate by a motor (302) located at the end of the mounting post (303). The input end of the drive shaft (310) is connected to the spindle (304) through a power transmission component (311).

6. A mixing method of a pulp mixing apparatus for papermaking according to claim 5, wherein It includes the following steps: Step 1: Add the pulp raw materials into the mixing tank (200); Step 2: Motor 1 (103), Motor 2 (301), and Motor 3 (302) start simultaneously. Motor 1 (103) drives the mixing tank (200) to rotate, Motor 2 (301) drives the mounting column (303) and the mixing unit (305) to rotate together, and Motor 3 (302) drives the drive shaft (310) to rotate through the spindle (304) and the power transmission component (311). The rotation of the drive shaft (310) will carry the mounting shell 1 (306) and the... The second housing (307) and the counterweight (315) rotate together. When the counterweight (315) rotates, under the action of centrifugal force, the counterweight (315) will move away from the drive shaft (310). When the counterweight (315) moves, it will drive the movable support (312) away from the bottom of the mounting groove through the connecting rod (316). The second spring (314) is compressed, and the movable support (312) moves together with the second housing (307), so that the stirring unit (305) extends out of the mounting groove. Then, under the action of centrifugal force, the stirring blade (308) extends out from the second mounting shell (307) through the sliding hole, and the first spring (309) is compressed. At this time, the stirring component (300) switches to the stirring state. The pulp raw material is stirred by the revolution of the stirring blade (308) around the axis of the mounting column (303) plus the rotation of the stirring blade (308) around the axis of the drive shaft (310). Step 3: After the stirring is completed, motor 1 (103), motor 2 (301) and motor 3 (302) stop running. Under the elastic force of spring 1 (309) and spring 2 (314), the stirring blade (308) retracts into the mounting shell 2 (307), and the mounting shell 1 (306) and mounting shell 2 (307) retract into the mounting groove. That is, the stirring unit (305) retracts into the mounting groove, and the stirring component (300) switches to the stop state.

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