Agitation mixing device

Abstract

To prevent a processed object that is agitated and mixed in a drum case by a rotor having an agitating claw externally mounted thereon from adhering to an inner surface at a put-in side of the drum case.SOLUTION: An agitation mixing device is configured such that a rotor 2 having a plurality of agitation claws 28 protrudingly formed on an outer periphery of a rotary shaft 17 is pivoted in a cylindrical drum case 1 and a processed object put in through a put-in port 14 provided at one end side of the drum case 1 is agitated while rotating the rotor 2 and is scraped toward the other end side to be ejected. A scraping claw 29 which scrapes out the processed object adhering to or having adhered to an inner surface of an end part of the drum case 1 is provided at an end part at the put-in port side of the rotary shaft 17. The tip of the scraping claw 29 and a side end face at the put-in port 14 side are made close to an inner peripheral surface and an internal end face of the drum case 1 to scrape the processed object adhering to or having adhere to the inner peripheral surface at the internal end face including a corner surface at the put-in port side 14 side of the drum case 1.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] This invention relates to a stirring and mixing device that performs stirring and mixing work by adding powder or granular materials to each other or liquid materials, paste-like materials, etc., and also by crushing (crushing) granular materials in the fields of manufacturing building materials, calcined materials, fuel, food materials, etc., and at construction sites such as civil engineering and building construction sites. [Background technology]

[0002] Conventionally, the present inventors have proposed such stirring and mixing devices as shown in Patent Documents 1 and 2. In both cases, a rotor with numerous hatchet-shaped stirring claws arranged spirally around a rotation axis is rotatably supported inside a horizontally long cylindrical drum case, and the material to be treated is fed into the input end of the drum case and sent out toward the discharge end while being stirred and mixed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6156803 [Patent Document 2] Patent No. 6889924 Summary of the Invention [Problem to be solved by the invention]

[0004] Of the above devices, the one in Patent Document 1 crushes, stirs, mixes and transports the material to be processed by rotating hatchet-shaped transport claws (stirring claws), and also has a separate back claw (return claw) attached to the discharge end of the rotating shaft that acts against the feed direction of the material to more effectively crush, stir and mix.

[0005] However, because a fixed amount of material to be treated is fed into the hopper side of the drum case, which serves as the inlet for the material to be treated, back pressure in the reverse direction and the addition of liquid or viscous materials (binders) to make the material viscous cause the material to adhere to the inner peripheral wall of the drum on the inlet side and the inner surface of the end plate, resulting in problems such as reduced stirring efficiency and increased rotational load on the rotor.

[0006] In addition, when imparting viscosity to the material to be treated or when pulverizing granular material, there are drawbacks such as deformation of the tines due to rotational resistance in the case of ordinary cultivator-type agitating tines. [Means for solving the problem]

[0007] The device of the present invention, which solves the above problems, is a stirring and mixing device in which a rotor 2 having a number of stirring claws 28 protruding from the outer periphery of a rotating shaft 17 is journaled within a cylindrical drum case 1, and while rotating the rotor 2, the material to be treated is stirred and scraped to the other end and discharged, and is characterized in that the end of the rotating shaft 17 on the inlet side is provided with scraping claws 29 for scraping off the material to be treated that has adhered or is adhering to the inner surface of the end of the drum case 1.

[0008] Secondly, the tip of the scraping claw 29 and the side end face on the inlet 14 side are brought close to the inner circumferential surface and the internal end face of the drum case 1, and the inner circumferential surface including the corner face on the inlet 14 side of the drum case 1 is structured to adhere to or scrape off the material to be treated that has adhered to the internal end face.

[0009] Thirdly, the agitating surface of the agitating claw 28 and / or the scraping surface of the scraping claw 29 are welded with build-up 32 of a wear-resistant material.

[0010] Fourthly, the stirring claw 28 is formed in a hatchet shape from a plate material, and is characterized in that two plates of the same shape are stacked and fixed together as a unit.

[0011] Fifth, a plurality of vibration-proof members 21 are interposed between the drum case 1 and the mounting base 4 on which the drum case 1 is mounted to prevent the device from vibrating during stirring and mixing operation.

[0012] Sixth, a plurality of knockers 24 are installed along the axial direction of the rotor 2 on the outer peripheral surface of the lower half of the drum case 1 to vibrate and separate and remove materials to be treated that have adhered to the inner surface of the drum case 1. [Effects of the Invention]

[0013] According to the present invention configured as described above, adhesion of the material to be treated to the inner surface of the end plate and the corner surface of the inner peripheral surface of the peripheral wall at the end of the drum case near the material inlet is prevented when the material is introduced, or any material that does adhere is instantly scraped off and removed.

[0014] This means that there is no extra load placed on the rotor rotation via the agitation claws due to the adhering material, which not only improves the agitation efficiency of the material to be treated, but also has the advantage of eliminating energy loss.

[0015] This is particularly effective when the material to be treated is viscous beforehand or becomes viscous due to heat or liquid components, as the adhesion is severe. In addition, by attaching a knocker to the outer periphery of the drum case, the material to be treated can be removed by dropping it from the inner periphery or from the claws.

[0016] In addition, the wear resistance of each claw can be improved by welding wear-resistant material to the stirring surface of the stirring claw and the scraping surface of the scraping claw, and durability can be increased by stacking and fixing the stirring claws together using plate-shaped members. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is an overall front view of a stirring and mixing apparatus of the present invention. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] (A) to (C) show side views of the scraping tines, stirring tines, and return tines attached around the rotating shaft, respectively. [Figure 6] (A) is an enlarged front view showing the scraping claws and their mounting mechanism inside the drum case, (B) is an enlarged right side view of the same, and (C) is an enlarged end view of the same. [Figure 7] This is an enlarged front view showing an embodiment of an agitator claw formed by integrally stacking the claw plates of hatchet claws. [Figure 8] 1A and 1B are an enlarged front view and a plan view showing the mounting mechanism of the vibration-isolating rubber interposed between the chassis and the mounting base of the device. DETAILED DESCRIPTION OF THE INVENTION

[0018] 1 to 8 show one embodiment of the present invention, and among these, FIGS. 1 to 3 are a front view, a plan view, and a right side view showing the external shape of the entire device.

[0019] The device has a cylindrical drum case 1 with a U-shaped cross section and an axis running in the left-right direction, and a rotor 2 (shown in Figure 4) supported for rotation via bearings 6 and 7 on both the left and right sides. The drum case 1 is attached to a chassis 3 consisting of a frame-like frame running in the left-right direction, and is installed on a mounting base 4 on the floor. In this example, the rotor 2 is driven to rotate counterclockwise when viewed from the right side.

[0020] On the outside of the bearing 6 on the left side of the drum case 1 of the chassis 3, a chain coupling 8, a reducer 9, a gear coupling 11, a motor 12, etc. are arranged in this order on the same axis, forming the drive side of the rotor 2.

[0021] As shown in Figure 3, the drum case 1 has a semicircular lower half that follows the outer periphery of the rotor 2 (described later), and front and rear walls that are U-shaped and open at the top. A flat lid 13 is removably attached to the open top end, and a top-open processing material inlet (hopper) 14 is installed at the left end of the lid 13, and a bottom-open processing material outlet (discharge chute) 16 is installed at the bottom on the right end (discharge end) of the drum case 1.

[0022] End plates 18, 19 are attached to both the left and right ends of the drum case 1, through which the rotating shaft 17 of the rotor 2 is inserted with a seal. A plurality of vibration-proof members 21 (six in total, in two rows, front and rear in this example) shown in FIG. 8 are interposed between the chassis 3 of the drum case 1 and the mounting base 4, providing a mechanism to prevent vibration and noise generation during the stirring and mixing operation of the device.

[0023] As shown in the figure, the vibration-isolating member 21 has vibration-isolating rubber 23 inserted between a plurality of flanges 22, 22, and the flanges 22 at the upper and lower ends are attached to the chassis 3 and the mounting base 4 by bolting, respectively.

[0024] In addition, a number of knockers 24 are arranged along the axial direction on both side walls of the bottom surface of the drum case 1, as shown in Figure 3, to apply impact vibrations to the peripheral wall 25 toward the axial center of the drum, thereby causing the materials to fall off.

[0025] The knocker 24 may be of any type, such as an air hammer, a solenoid valve, or an electromagnetic vibration type. Furthermore, a plurality of fluid supply nozzles 26 are arranged on the lid 13 to supply additives such as water (steam) to the material to be treated in the drum case 1 or to heat it with steam.

[0026] As shown in FIG. 6, elastic rubber or plastic liners 27a and 27b are attached and fixed to the inner surfaces of the peripheral wall 25 and end plates 18 and 19 of the drum case 1 to prevent the material to be treated from adhering to the inner surface and to make it easier to remove the material that has adhered, as well as to protect the inner surface of the drum and reduce noise during operation.

[0027] As shown in Figures 4 to 6, the rotor 2 has a number of stirring claws (feed claws) 28a arranged in a spiral shape and protruding radially from the outer periphery of the rotating shaft 17, and in this example, a scraping claw 29 is attached to the left end, which is the end where the material is fed to be processed, and a return claw 28b, which is a type of stirring claw 28, is attached to the right end, which is the end where the material is discharged to be processed.

[0028] Each claw is attached to a claw holder 31 that is spirally protruding at a pitch of 60° around the axis so as to be detachable and replaceable.

[0029] The agitator tines 28 (feed tines 28a, return tines 28b) are similar to the rotary (cultivator) tines attached to the rotary of a tractor or cultivator, and are formed by twisting toward the tip and curving in a mountain shape along the direction of rotation. Of these, the feed tines 28a act to agitate, crush, and mix the material to be treated as the rotor rotates, while sending it toward the discharge outlet.

[0030] In contrast, the pair of return claws 28b protruding from the discharge end side are formed so that the twisting direction of the claws is opposite to that of the feed claws 28a, and act to return the processed material sent to the discharge end side by the rotor rotation in the opposite direction, thereby ensuring stirring, mixing and discharge while preventing the processed material from accumulating at the discharge end side.

[0031] Each of the agitator claws 28 is made up of two plates that are curved and twisted in the same direction, which are overlapped and fixed together by welding or rivets as shown in Figure 7, thereby providing reinforcement that is strong enough to withstand the agitation and mixing of highly sticky materials that have high agitation resistance.

[0032] Furthermore, a pair of scraping claws 29 protrude from the input end of the rotor 2 inside the drum case 1. As shown in FIG. 6, these scraping claws 29 are formed from a plate material with an L-shaped cross section. One side of the L-shaped cross section is detachably fastened with a bolt to the claw holder 31, and the side of the other side is close to the inner surface of the liner 27b of the end plate 18. Furthermore, the tip of the scraping claws is close to the inner surface of the liner 27a of the peripheral wall 25. As the rotor rotates, the scraping claws 29 scrape off or prevent the adhesion of processed material that has adhered to the inner surface of the end plate 18 and the corners where the rotor meets the peripheral wall 25.

[0033] On one or both of the surfaces (agitation surfaces) that are pressed against the material to be processed during the agitation operation with the agitating claws 28 and perform the agitation, crushing and mixing operation, and the surfaces (scraping surfaces) that are pressed against the material to be processed and perform the scraping operation with the scraping claws 29 during scraping, a wear-resistant material is welded to form a build-up portion 32. The build-up portion 32 improves the abrasion resistance and durability of the agitating claws 28 and scraping claws 29, and maintains the agitation and scraping functions for a long period of time. [Explanation of symbols]

[0034] 1 drum case 2 rotors 4 Mounting base 14 Hopper 17 Rotation axis 21 Vibration-proof member 24 Knocker 28 Stirring claw 28a Feed jaw 28b Return claw 29 Scraping claw 32 Build-up section (build-up welding)

Claims

1. A rotor (2) having a number of stirring claws (28) protruding from the outer periphery of a rotating shaft (17) is journaled within a cylindrical drum case (1), and while the rotor (2) is rotated, the processed material fed through an inlet (14) provided at one end of the drum case (1) is stirred and scraped toward the other end for discharge. The stirring and mixing device is provided with scraping claws (29) at the end of the inlet side of the rotating shaft (17) for scraping off the processed material that is or has adhered to the inner surface of the end of the drum case (1).

2. 2. The stirring and mixing device according to claim 1, wherein the tip of the scraping claw (29) and the side end face on the inlet (14) side are brought into close proximity along the inner peripheral surface and the internal end face of the drum case (1), and the inner peripheral surface including the corner face on the inlet (14) side of the drum case (1) is structured to adhere to the internal end face or to scrape off the material to be treated that has adhered thereto.

3. 2. The stirring and mixing device according to claim 1, wherein one or both of the stirring surfaces of the stirring claws (28) and the scraping surfaces of the scraping claws (29) are welded with build-up (32) of a wear-resistant material.

4. 2. The stirring and mixing device according to claim 1, wherein the stirring claws (28) are formed in a hatchet shape from plate material and are made of two plates of the same shape that are stacked and fixed together.

5. The stirring and mixing device according to any one of claims 1 to 4, wherein a plurality of vibration-damping members (21) are interposed between the drum case (1) and the mounting base (4) on which the drum case (1) is installed, to prevent the device from vibrating during stirring and mixing operation.

6. 5. The stirring and mixing device according to claim 1, wherein a plurality of knockers (24) are installed along the axial direction of the rotor (2) on the outer peripheral surface of the lower half of the drum case (1) to vibrate and separate and remove the material to be treated adhering to the inner surface of the drum case (1).

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