JP2001321653A - Mixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To satisfactorily prevent the harmful effect by frictional heat, or the like, generated during the agitating/mixing of raw materials to be agitated, and to facilitate the work of discharging the raw materials after agitated/mixed without requiring manual aid. SOLUTION: This mixing device 1 is provided with a rotary drum 8, around the outer peripheral surface of which a jacket 12 is arranged for circulating a medium for adjusting the temperature and on the inner peripheral surface of which plural agitating blades are projected for scraping up the raw materials in the circumferential direction, rotary wheels 5, 5 connected to an electric motor 7 to be rotatable for rotating the drum 8 at a low speed and a supporting rack 2 on which the drum 8 of such a slanted state that the discharging port 11a side of the drum 8 is obliquely slanted downward is mounted to be rotatable while interposing the wheels 5, 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of stirring and mixing a plurality of kinds of powder materials or granular materials, or a method of stirring and mixing paste materials obtained by adding a liquid material to powder materials or granular materials. The present invention relates to an improvement of a mixing device used in cases such as the following.

[0002]

2. Description of the Related Art Conventionally, a plurality of types of powder materials or granular materials are agitated and mixed with each other, or a paste material obtained by adding a liquid material to powder materials or granular materials is agitated and mixed. The mixing device used for the above-mentioned is a cylindrical mixing container for charging (storing) the various raw materials (hereinafter, referred to as “stirred raw materials”), and the stirring raw materials are stirred and mixed by being electrically driven in the mixing container. A device equipped with a rotary stirring blade is generally known.

[0003] In the mixing apparatus having the above-described configuration, when stirring and mixing the stirring raw materials, the stirring raw materials to be stirred and mixed are charged into a cylindrical mixing vessel, and then the rotary stirring blade is driven to rotate. By dispersing and replacing the stirring raw material by sliding contact with a rotary stirring blade, the stirring raw material can be favorably stirred and mixed. The stirred raw material after stirring and mixing is discharged from the discharge port by opening the discharge port provided in the mixing container.

[0004]

However, in the mixing apparatus having the above structure, the rotary stirring blade is rotated at a relatively high speed (several hundreds to several thousand rpm). As a result, frictional heat is easily generated (that is, stirring and mixing cannot be performed under a certain temperature condition). As a result, when stirring and mixing a heat-sensitive stirring material, the stirring material is softened and mixed. It was difficult to obtain a stable quality of the stirring raw material due to melting or the like.

[0005] As described above, the agitated raw material is softened or melted by the generation of frictional heat, and when the agitated raw material adheres to the mixing vessel, the mixing ratio of the agitated raw material changes or the amount of the agitated raw material equal to the input amount is changed. Or could not be obtained.

[0006] Further, the discharge of the stirring raw material after stirring and mixing is as follows:
Although this was performed by opening the discharge port provided in the mixing container, the stirred raw material present in the vicinity of the discharge port can be relatively easily discharged, but is separated from the discharge port, for example, at the corner of the mixing container. The stirring raw material existing in the above had to be manually discharged by inclining the mixing vessel or the like, which was troublesome and time-consuming, and was very troublesome.

SUMMARY OF THE INVENTION In view of the above-mentioned various problems, the present invention satisfactorily prevents adverse effects due to frictional heat and the like generated during stirring and mixing of the stirring raw materials, and requires labor for discharging the stirring raw materials after the stirring and mixing. It is an object of the present invention to provide a mixing device that can be easily performed without using the mixing device.

[0008]

According to the present invention, in order to solve the above-mentioned problems, a mixing device comprises a hollow rotary drum for accommodating a powdery, granular, paste-like stirring raw material, and the rotary drum. A rotating means for rotating at a predetermined speed, a support table on which the rotating drum is rotatably mounted via the rotating means, and a stirrer while maintaining the stirring raw material stored in the rotating drum under constant temperature conditions. And a temperature adjusting means for mixing.

Further, in the mixing device according to the first aspect,
The support table is formed so that the rotary drum can be rotatably mounted via a rotating unit in a state where the rotary drum is inclined at a predetermined angle, and further, the support table is rotatably mounted in an inclined state. The rotating drum is provided with a holding member for preventing the rotating drum from slipping off the support table.

Further, in the mixing apparatus according to claim 1,
The temperature adjusting means includes a jacket provided on the outer peripheral surface of the rotating drum, which is rotatably mounted on the support table in a state of being inclined, and surrounding the rotating drum. Medium supply means for supplying the medium.

4. The mixing apparatus according to claim 1, wherein said rotary drum has a hollow cylindrical drum main body, and a charging lid having a stirring raw material charging port attached to an opening of said drum main body. And a discharge lid having a discharge port for the stirring raw material, and a plate for scraping the stirring raw material in the circumferential direction at the time of stirring and mixing is provided on each inner peripheral surface of the drum body, the input lid, and the discharge lid. A plurality of agitating blades are provided so as to protrude at predetermined angular intervals in the circumferential direction.

Further, in the mixing device according to claim 3,
The jacket is provided with a closed portion at an inclined lower end of a rotating drum mounted on a support table in an inclined state, and an opening at an inclined upper end of the rotating drum. A medium for temperature adjustment such as cooling water flows into the jacket from above the opening located on the side of the rotating drum, and overflows the medium from below the opening located on the lower side of the rotating drum. Features.

[0013] Further, in the mixing apparatus according to claim 5,
An openable and closable communication hole for discharging a medium for temperature adjustment such as cooling water from the inside of the jacket as necessary is provided in a closed portion of the jacket.

Further, in the mixing apparatus according to claim 4,
The medium supply means includes a first storage tank for storing a medium for temperature adjustment such as cooling water, a second storage tank for temporarily storing the medium overflowing from a jacket, and a storage tank for storing the medium in the second storage tank. Feeding means such as a pump for feeding the medium to the first storage tank so that the medium is circulated between the second storage tank and the first storage tank for use. It is characterized by comprising.

According to the present invention, a rotating drum having a jacket for circulating a medium for temperature adjustment on an outer peripheral surface thereof and a plurality of stirring blades projecting from an inner peripheral surface thereof is provided. Since the mixing device is mounted on the support table in a state where it can be rotated obliquely downward and is rotatable by the rotating means, the stirring raw material charged (stored) in the rotating drum is adversely affected by generation of frictional heat and the like. Without stirring, it is possible to stir and mix well under a constant temperature condition, and the stirred raw material after stirring and mixing can be easily removed from the inside of the rotating drum without requiring any manual operation by tilting the rotating drum. Can be discharged.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIGS. 1 and 2, reference numeral 1 denotes a case where a plurality of types of powder raw materials or granular raw materials are agitated and mixed with each other, or a paste raw material obtained by adding a liquid raw material to powder raw materials or granular raw materials is stirred and mixed. It is a mixing device of the present invention used for the present invention. Reference numeral 2 denotes a support base framed by an angle iron, a grooved steel, or the like, and formed with its left end (left side in FIG. 2) obliquely downward.

Reference numeral 3 denotes bearing members mounted on the front and rear end sides (left and right directions in FIG. 2) of the support base 2, respectively. Reference numeral 4 denotes a rotating shaft rotatably supported by the bearing member 3, and rotating wheels 5 and 5 are attached to both ends (left and right ends in FIG. 2) of the rotating shaft 4, respectively. Reference numeral 6 denotes a sprocket fixed to the rear end side (the right side in FIG. 2) of the rotary shaft 4. The sprocket 6 is mounted on a mounting frame 2a below the support base 2 via a connecting member t such as a chain. The motor 7 is drivably connected to the motor 7.

Next, reference numeral 8 denotes a hollow rotary drum for accommodating the above-mentioned various raw materials (hereinafter referred to as "stirred raw materials"). The rotary drum 8 has a hollow cylindrical drum body 9 as shown in FIG. And one end of the drum body 9 (right side in FIG. 3)
Inlet 1 for stirring raw material, which is fastened and fixed with bolts etc.
0a, and the other end (the left side in FIG. 3) of the drum body 9 is fastened to the other end of the drum main body 9 with a bolt or the like.
A fixed, funnel-shaped discharge lid 11 having a discharge port 11a for the stirred raw material, and as shown in FIG. 2, with the discharge port 11a side of the discharge lid 11 facing obliquely downward, It is mounted on the support base 2 so as to be rotatable via rotating wheels 5 and 5.

On the inner peripheral surface of the drum body 9, plate-shaped stirring blades 9 a for scraping the stirred raw material in the circumferential direction are provided at a predetermined angle in the circumferential direction of the drum body 9. A plurality of protruding members are provided at intervals, and the inner peripheral surfaces of the input lid 10 and the discharge lid 11 are provided with input ports 10a and discharge ports 10a from the opening side fastened and fixed to the drum body 9. Exit 1
1a, a plurality of stirring blades 1 like the stirring blades 9a protruding from the inner peripheral surface of the drum body 9 respectively.
0b and 11b are protruded at predetermined angular intervals in the circumferential direction.

In FIG. 3, reference numeral 12 denotes a drum body 9;
A jacket provided on the outer peripheral surface of the drum body so as to surround the same. As shown in FIG. 3, a hollow cylindrical body is provided on a flange portion 12a provided on the left side of the drum body 9 (left side in FIG. 3). 12
By fixing one end of b by welding or the like, FIG.
The opening 12c is formed on the right side (i.e., the side that faces obliquely upward when mounted on the support base 2) as shown in FIG.

As shown in FIG. 4 (a), the flange 12a forming the bottom of the jacket 12 is provided with a communication hole 12d for communicating the inside and the outside of the jacket 12 with one hole. Is the closure plug 1 as shown in FIG.
It is closed by detachably screwing 2e. On the right side of the drum body 9 (the right side in FIG. 3), a locking projection 9b is provided at a predetermined height around which a rotating wheel 14a of a holding member 14 to be described later rotatably abuts.

Next, in FIG. 1 and FIG.
This is a fixed base which is provided upright on both left and right ends (left and right ends in FIG. 1) via support columns 13a, support plates 13b and the like. Reference numeral 14 denotes a holding member which is fastened and fixed with a bolt or the like at a position closer to the rear of the fixed base 13 (to the right in FIG. 2). A rotating wheel 14a provided on the upper end side of the holding member 14 is A locking projection 9b provided on the outer peripheral surface of the drum body 9 of the rotating drum 8 has
The rotatable abutment prevents the rotating drum 8 from slipping off the rotating wheels 5 and 5 (on the support base 2).

Next, in FIG. 5, reference numeral 16 denotes a cooling medium, for example, a cooling water as a temperature adjusting medium for stirring and mixing the stirring raw material charged (stored) in the rotating drum under a constant temperature condition. This is a water storage tank for storing water, and the water storage tank 16 is installed above the mixing device 1 as shown in FIG. The water storage tank 16 may be replenished with cooling water from a water supply source (not shown) as needed. 17 connects the base end side to the bottom of the water storage tank 16,
And a jacket 1 whose front end is provided on the outer periphery of the rotary drum 8.
2 is a water supply pipe hanging down and extending to a position close to the upper side opening 12 c of the second water supply pipe, and a valve V for water flow adjustment is disposed in the water supply pipe 17, for example.

Numeral 18 denotes a lower opening 12 of a jacket 12 having a base end side (right side in FIGS. 2 and 5) provided on the outer periphery of the rotary drum 8.
This is a gutter provided in the center of the support base 2 in the width direction (the left-right direction in FIG. 1) in a state corresponding to c. In addition, at a position corresponding to the front end side of the receiving gutter 18 protruding from the front end side (the left side in FIG. 2) of the support base 2, it overflows from the lower opening 12 c of the jacket 12 and flows down in the receiving gutter 18. A water receiving tank 19 for storing cooling water to be supplied is provided. Reference numeral 20 denotes a pump for pumping which is provided in the middle of a feed pipe 21 connecting the water receiving tank 19 and the water storage tank 16, and forcibly circulates cooling water between the water receiving tank 19 and the water storage tank 16. Let it.

Next, the operation of the mixing apparatus 1 of the present invention will be described. In the present invention, the stirring raw materials to be stirred and mixed are weighed in advance, and then are charged into the drum main body 9 by a predetermined amount from the input port 10a of the input lid 10, and the inside of the drum main body 9 tilted obliquely downward is supplied. It moves while being stirred and mixed under a constant temperature condition, and is discharged from the discharge port 11a of the discharge cover 11 by a fixed amount.

That is, at the same time as the stirring raw material is charged into the drum main body 9 from the charging port 10a of the charging cover 10, the electric motor 7
Is started and the rotational force is applied to the connecting member t → sprocket 6
→ The rotation is transmitted to the rotating wheels 5, 5 via the rotating shaft 4, and the rotating drum 8 mounted on the rotating wheels 5, 5 is moved at a low speed (for example, 1 to 5).
When rotated at about 5 rpm), the stirring raw material charged into the drum main body 9 is charged into the charging lid 1 as shown in FIG.
0, a plurality of agitating blades 10b, 9a, 11b protruding from the respective inner peripheral surfaces of the drum main body 9, and the discharge lid body 11 are repeatedly scraped up in the circumferential direction and fall down, thereby successively. Stir and mix. In addition, since the stirring raw material rotates while the drum main body 9 is inclined, the stirring raw material gradually moves to the discharge port 11a side of the discharge cover 11 while repeating the circumferential scraping and falling operations. .

On the other hand, when the valve V disposed on the water supply pipe 17 is opened, cooling water is supplied from the water storage tank 16 to the drum body 9 side of the rotary drum 8 via the water supply pipe 17, and the outer periphery of the drum body 9 After flowing along the surface, it flows into the jacket 12 through the upper opening 12 c of the jacket 12.
At this time, since the rotating drum 8 (drum main body 9) is inclined with the discharge port 11a facing obliquely downward as shown in FIGS. When the drum main body 9 rotates in this state, the cooling water moves in a jacket 12 provided around the outer periphery of the drum main body 9 in a direction indicated by an arrow in FIG. The outer peripheral surface of the drum body 9 is maintained at a constant temperature by contacting substantially the entire outer peripheral surface of the drum 9.

The cooling water supplied from the water storage tank 16 flows into the jacket 12 sequentially, so that the excess cooling water in the jacket 12 overflows from the lower opening 12c of the jacket 12. Then, it flows down in the receiving trough 18 and flows into the water receiving tank 19. The cooling water that has flowed into the water receiving tank 19 is further supplied from the water receiving tank 19 to the water storage tank 16 installed above the mixing device 1 via the feed pipe 21 by starting the pump 20. The cooling water supplied to the water storage tank 16 is supplied again to the jacket 12 on the outer peripheral surface of the drum main body 9 via the water supply pipe 17 to maintain the outer peripheral surface of the drum main body 9 at a constant temperature.

That is, the cooling water is supplied from the water storage tank 16 to the water supply pipe 17.
→ Upper opening 12c of jacket 12 → Jacket 1
The stirring raw material stored (input) in the rotating drum 8 is maintained at a constant temperature by circulating in the order of the lower side opening 12c of the second → the gutter 18 → the water receiving tank 19 → the feed pipe 21 → the water storage tank 16. Can be stirred and mixed in a hot state.

In the rotary drum 8, the stirred raw material stirred and mixed under a constant temperature condition, the discharge cover body inclined obliquely downward due to the rotation of the rotary drum 8 in an inclined state. 11 gradually moves to the discharge port 11a side, and is sequentially discharged to the outside of the rotary drum 8 from the discharge port 11a. At this time, the stirring raw material present at the corners of the discharge lid 11 is swept up by the stirring blades 11b provided on the inner peripheral surface of the discharge lid 11 as the rotary drum 8 rotates, and Since the material is guided to the side 11a and is discharged from the discharge port 11a, the stirred raw material does not remain at the corner.

When the cooling water existing in the jacket 12 is drained, a communication hole 12d formed in the flange 12a closed by the closing plug 12e (FIG. 4B)
(See FIG. 4 (a)) can be easily drained by unscrewing the closure plug 12e and opening it (see FIG. 4 (a)). Further, at this time, if the communication hole 12d is opposed to the receiving gutter 18, there is no need to specially prepare a container for receiving the cooling water discharged from the inside of the jacket 12.

As described above, in the present invention, the cooling water for adjusting the temperature is passed through the jacket 12 provided on the outer peripheral surface of the rotary drum 8 so that the temperature can be controlled under a constant temperature condition.
A plurality of stirring blades 9a, 10b, 11b protruding into the rotating drum 8 are used to stir the raw material charged into the rotating drum 8.
By repeating the operation of scraping in the circumferential direction and falling downward, and stirring and mixing sequentially, the stirring raw materials can be well stirred and mixed without being adversely affected by heat or the like. it can.

Further, since the rotary drum 8 is rotated in an inclined state, the stirring raw material charged into the rotary drum 8 is gradually moved to the discharge port 11a side while being stirred and mixed. As a result, the agitated raw material can be discharged easily and automatically without being troubled as a result of the automatic discharge from the discharge port 11a.

Further, the cooling water for temperature adjustment which flows through the jacket 12 is supplied between a water receiving tank 19 for storing cooling water overflowing from the jacket 12 and a water storage tank 16 installed above the mixing device 1. The stirring raw material can be stirred and mixed under a certain minimum temperature condition with a minimum necessary amount of cooling water.

In the present invention, an example in which cooling water is used as a medium for temperature adjustment has been described. However, the present invention is not limited to this. For example, the cooling water is charged into a rotating drum in a pre-warmed state. If the purpose is to stir and mix the stirred raw material while maintaining it at a constant temperature, hot water may be used.

[0036]

According to the present invention, as described above, the stirring raw material charged into the rotating drum is rotated in a circumferential direction by a plurality of stirring blades protruding inside the rotating drum by rotating the rotating drum at a low speed. Since the operation of scraping up and falling down is repeated to sequentially stir and mix, when stirring and mixing using a rotary stirring blade that rotates the stirring raw material at a relatively high speed as in the conventional case, In comparison, it is possible to favorably suppress the generation of frictional heat and the like, and as a result, it is possible to reliably solve the problem that the stirred raw material is adversely affected by heat.

Further, the rotary drum is rotatably mounted on a support table via rotary wheels with its discharge port facing obliquely downward. The agitated raw material is sequentially moved to the discharge port side while being stirred and mixed, and is guided to the discharge port side by a stirring blade provided on the peripheral surface of the discharge lid body, and is discharged from the discharge port. The stirring raw material can be discharged quickly and easily without troublesome labor.

Further, a bottomed cylindrical jacket is formed on the outer peripheral surface of the rotary drum, and a medium for adjusting the temperature (cooling water) is circulated in the jacket, so that stirring under a constant temperature condition is performed. Stirring and mixing of the raw materials are enabled, and a stable quality of the stirring raw materials can be obtained in combination with the structure in which the stirring raw materials can be stirred and mixed without using a rotary stirring blade as described above.

In addition, cooling water as a medium for temperature adjustment is caused to flow into the jacket from the upper opening, and excess cooling water in the jacket is caused to flow out (overflow) from the lower opening. Therefore, even if the rotary drum is rotated, it is possible to make the cooling water surely contact almost the entire outer peripheral surface of the rotary drum and maintain the outer peripheral surface at a constant temperature.

Further, since a communication hole for draining water is provided at the bottom (flange) of the jacket, the operation of draining the cooling water in the jacket can be performed quickly without lowering the rotating drum from above the mixing device. It can be done easily.

Further, the cooling water circulated through the jacket is circulated using a pump between a water receiving tank for storing the cooling water overflowing from the jacket and a water storage tank provided above the mixing device. Therefore, it is sufficient that the cooling water has a necessary minimum amount (to fill the water tank), and no additional cooling water is required. In a suppressed state, the stirring and mixing of the stirring raw materials can be performed under a constant temperature condition.

[Brief description of the drawings]

FIG. 1 is a front view showing a mixing device of the present invention.

FIG. 2 is a side view of the mixing device.

FIG. 3 is a side view showing a longitudinal section of a rotary drum used in the mixing apparatus of the present invention.

FIG. 4 is an enlarged sectional view showing a portion P in FIG. 3;

FIG. 5 is an explanatory diagram for explaining the operation of the mixing device when stirring and mixing the stirring raw materials.

FIG. 6 is an explanatory diagram for explaining the operation of the mixing device when stirring and mixing the stirring raw materials.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 mixing device 2 support base 5 rotating wheel 7 motor 8 rotating drum 12 jacket 14 holding member 16 water storage tank 17 water supply pipe 18 receiving gutter 19 water receiving tank 20 pump 21 feed pipe

Claims (7)

[Claims] 1. A hollow rotary drum for accommodating a powdered, granular, or paste-like agitated raw material, rotating means for rotating the rotary drum at a predetermined speed, and rotating the rotary drum via a rotating means. A mixing table, wherein the mixing table comprises: a supporting table on which the raw material can be mounted; and a temperature adjusting means for stirring and mixing the stirred raw material stored in the rotary drum while maintaining the temperature under a constant temperature condition. apparatus. 2. The support table is formed so as to be rotatably mounted via a rotating means in a state where the rotary drum is inclined at a predetermined angle, and further, the support table is provided in an inclined state. 2. The mixing apparatus according to claim 1, further comprising a holding member for preventing the rotating drum mounted rotatably from sliding down on the support table. 3. The temperature adjusting means includes a jacket provided on an outer peripheral surface of a rotating drum rotatably mounted on a support table in an inclined state and surrounding the rotating drum, and cooling inside the jacket. 2. The mixing apparatus according to claim 1, further comprising a medium supply means for supplying a medium for adjusting the temperature of water or the like. 4. The rotating drum has a hollow cylindrical drum main body, a charging lid attached to an opening of the drum main body and having a charging raw material input port, and a discharge lid having a stirring raw material discharging port. A plate-shaped agitating blade for circumferentially scraping the agitated raw material at the time of agitation and mixing is provided on the inner peripheral surface of each of the drum body, the charging lid, and the discharging lid. 4. The mixing device according to claim 1, wherein a plurality of the mixing devices are protruded at an angle interval. 5. The jacket is provided with a closing portion at an inclined lower end of a rotating drum mounted on a support table in an inclined state, and an opening at an inclined upper end of the rotating drum. A medium for adjusting the temperature such as cooling water flows into the jacket from above the opening located on the upper side of the rotating drum, and overflows the medium from below the opening located on the lower side of the rotating drum. The mixing device according to claim 3, wherein the mixing device is configured as follows. 6. A communication hole which can be opened and closed for discharging a medium for temperature adjustment, such as cooling water, from the inside of the jacket as needed in a closed portion of the jacket. A mixing device as described. 7. The medium supply means includes: a first storage tank for storing a medium for temperature adjustment such as cooling water; a second storage tank for temporarily storing the medium overflowing from a jacket; Feeding means such as a pump for feeding a medium stored in the first storage tank to the first storage tank, and circulating the medium between the second storage tank and the first storage tank. The mixing device according to claim 4, wherein the mixing device is configured to be used.