JP7303071B2 - Filter unit for powder mixer - Google Patents

Description

Article 30, Paragraph 2 of the Patent Act applies Date of sale: March 22, 2019 and April 19, 2019, Sale destination: NGK SPARK PLUG CO., LTD.

The present invention prevents powder from entering a rotary seal member of a rotary joint that rotates the rotary drum in a powder mixer equipped with a rotary drum, thereby preventing wear and damage to the seal member and breakage of the rotary joint. It relates to an improved structure of a filter unit that can reliably prevent.

Conventionally, there has been known a mixer that mixes powdered materials put into a rotating drum by rotating the rotating drum. In addition, a so-called mixer with a heating device is also known, in which a heater is installed around the rotating drum, and the heat of the heater is used to heat and mix the powder material in the rotating drum (see the following patent documents: 1).

Japanese Patent Publication No. 5-42295

FIG. 7 is a side view showing the structure of the mixer C with a heating device described in Patent Document 1 above. 8 is a front view of the mixer B. FIG.

7 and 8, reference numeral 101 denotes a rocking table attached to a fixed table 102 by means of a support shaft 103, and 104 a crank mechanism having one end connected to the rocking table 101. FIG.

The crank mechanism 104 is composed of links 107a and 107b, the other end of which is connected to the output shaft 106 of the reduction gear 105. The rotation of the output shaft 108a of the first electric motor 108 is generally controlled by the reduction gear 105 by the links 107a and 107b. It is transmitted to the rocking table 101 to rock the rocking table 101 around the support shaft 103 .

Reference numeral 109 denotes a rotating shaft mounted rotatably in the front-rear direction (horizontal direction in FIG. 7) of the rocking table 101 via bearings (not shown). .

111 shown in FIG. 8 is a second electric motor that rotates the rotating wheel 110 via a belt 112, and 113 is a rotating drum that is rotatably mounted on the rotating wheel 110. FIG. A pair of rocking rings 114 are attached in the circumferential direction near both ends of the rotating drum 113 in the longitudinal direction.

A rocking wheel 115 is mounted on the rocking table 101 below the rotating drum 113 in close proximity to the inner surface of the rocking ring 114. When the rocking table 101 rocks, the rocking wheel 115 While maintaining the rotation of the rotating drum 113 by contacting the rocking ring 114, the rotating drum 113 is prevented from sliding down from the rocking table 101. - 特許庁

A lower cover 116 is fixed to the rocking table 101 and surrounds the lower part of the rotary drum 113 , and rocks together with the rocking table 101 . An upper cover 117 is placed on the lower cover 116 and surrounds the rotating drum 113 .

The upper cover 117 has openings at positions corresponding to the rotary joint 119 attached to the left end cover 118 and the right end opening of the rotary drum 113 shown in FIG. The lower cover 116 can be opened and closed.

A heat insulating material 120 is attached to the inner surface of the upper cover 117 , and a heater 121 is attached to the inner side of the upper cover 117 .

Reference numeral 122 shown in FIG. 7 denotes a flow pipe that passes through the inside of the rotary joint 119 and evacuates the inside of the rotating drum 113. Reference numeral 122a indicates that when the inside of the rotating drum 113 is vacuum-evacuated, the powder in the rotating drum 113 A filter is shown to prevent . Reference numeral 123 denotes a feeding pipe for feeding gas, water, solution, etc., into the rotating drum 113, and 124 denotes a thermocouple for detecting the temperature of the powder inside the rotating drum 113 and the like.

Reference numeral 125 denotes a support arm extending forward and upward (toward the upper right in FIG. 7) from the rocking table 101, and a pair of locking plates 126 arranged side by side with a gap is attached to the tip of the support arm. By engaging the anti-rotation plate 127 attached to the lower portion of the circulation pipe 122 located, the rotation of the later-described protection pipes of the circulation pipe 122, the feed pipe 123, and the thermocouple 124 inserted through the rotary joint 119 is prevented. prevent.

FIG. 9 is an enlarged longitudinal sectional view of the rotary joint 119. As shown in FIG. The rotary joint 119 is attached to one end of the rotating drum 113 to rotate the rotating drum 113, and is connected to one end of the rotating drum 113 and a fixed cylinder 129 having a bearing 128 fitted on its outer periphery. It is composed of a rotating cylinder 130 that rotates around a fixed cylinder 129 using a bearing 128 .

Through the fixed cylinder 129, a flow pipe 122 for vacuum degassing the inside of the rotating drum 6, a feed pipe 123 for supplying gas, water or solution into the rotating drum 6, and a protective pipe 124a for the thermocouple 124 pass. The flow pipe 122, the feed pipe 123, and the protection pipe 124a are fixed to both end surfaces of a fixed cylinder 129 by a pair of support plates 131a and 131b.

The thermocouple 124 is connected to the lead wire 132 after being led out of the rotating drum 6 from the support plate 131b by the protection pipe 124a. A seal member 133 for rotation is attached between the fixed barrel 129 and the rotary barrel 130 to assist the rotation of the rotary barrel 130 .

In addition, 134 shown in FIG. 7 is a bending joint that enables the flow pipe 122 to bend corresponding to the rocking motion of the rocking table 101 . The feed pipe 123 is made of a flexible resin pipe so that it can respond to the swing motion.

According to the mixer B with the heating device configured as described above, the powder material accommodated inside is stirred and mixed while being heated by the heat of the heater while the rotary drum 113 rotates and oscillates.

7 to 9, the rotating drum 113 rotates while swinging, and heats and mixes the powder introduced into the rotating drum 113. Therefore, the powder in the rotating drum 113 contacts the rotary joint 119 shown in FIG.

The powder coming into contact with the rotary joint 119 enters the interior through the gap between the fixed cylinder 129 and the rotary cylinder 130, and contacts the rotating seal member 133, causing wear and damage to the seal member 133. It was.

In particular, when a liquid such as water or a solution is sprayed into the rotary drum 113, if the liquid directly contacts the fixed cylinder 129 or the rotary cylinder 130, powder tends to adhere to the fixed cylinder 129 or the rotary cylinder 130 due to the action of the liquid. As a result, the powder tends to enter the gap between the fixed cylinder 129 and the rotary cylinder 130 , easily causing damage to the seal member 133 and damage to the bearing 128 .

Furthermore, since the filter 122a is positioned inside the rotary drum 113, the filter area cannot be increased, and a sufficient amount of ventilation cannot be ensured, and clogging due to adhesion of powder has been caused.

Moreover, as the rotating drum 113 rotates and oscillates, the powder in the rotating drum 113 is placed on the filter 122a. was likely to occur, leading to a decrease in the powder recovery rate.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a filter unit for a powder mixer that can solve the various problems of the conventional mixer B as described above.

The filter unit according to claim 1 is a substantially bottomed cylindrical filter comprising a case body and a case bottom, which is attached to the outside of the rotating drum with an attachment opening attached to the powder inlet/outlet of the rotating drum. A case and a bottomed hollow cylindrical shape are formed, the bottom of which faces the powder inlet/outlet of the rotating drum, the opening of which is fixed to a fixed plate having a ventilation hole communicating with the opening, a filter fixed and housed in the filter case by fixing the fixing plate to the bottom of the case ; A rotary joint for rotating the filter case is provided around the degassing pipe, and a seal member for rotation is provided between the rotary joint and the degassing pipe.

The filter unit according to claim 2 includes a case body, a case bottom, and a constriction, which are attached to the outside of the rotating drum, with a connection part connected to a connection adapter attached to the powder inlet/outlet of the rotating drum. and a hollow cylindrical filter case with a bottom, the bottom of which is directed to the powder inlet/outlet of the rotating drum, and the opening of which communicates with the opening. a plurality of filters fixed and accommodated in the filter case by fixing to a fixing plate provided and attaching the fixing plate to the bottom of the case; A rotary joint for rotating the filter case around the degassing pipe is provided on the outer periphery of the degassing pipe attached to the side, and a rotary seal member is provided between the rotary joint and the degassing pipe. have

The invention according to claim 3 is characterized in that the filter case according to claim 1 or claim 2 is provided with a hanging jig.

According to the first aspect of the invention, since the rotary joint is provided at the post-stage position of the filter, the rotating seal member of the rotary joint does not come into contact with powder or liquid. It can solve the problem of bearing damage. Further, by forming the filter in the shape of a hollow cylinder, it is possible to secure a sufficient amount of airflow through the filter, secure a filter area, and prevent clogging of the filter with powder.

According to the second aspect of the present invention, since a plurality of filters are provided, a large filter area can be obtained, and clogging due to powder is less likely to occur during vacuum degassing.

According to the third aspect of the invention, when the filter unit is attached to or detached from the powder inlet/outlet of the rotating drum, the jig is provided for lifting the filter unit. can be prevented.

Fig. 2 is a side view of a powder mixer to which the filter unit of the present invention is attached; It is a front view of a powder mixer to which the filter unit of the present invention is attached. FIG. 3 is an enlarged vertical cross-sectional view of the filter unit of the present invention; FIG. 5 is an enlarged longitudinal sectional view of a filter unit according to another embodiment of the invention; FIG. 5 is a side view of a powder mixer to which a filter unit according to another embodiment of the invention is attached; FIG. 5 is a front view of a powder mixer to which a filter unit according to another embodiment of the invention is attached; FIG. 11 is a side view showing a conventional mixer with a heating device; and FIG. 11 is a front view showing a conventional mixer with a heating device. and FIG. 10 is an enlarged vertical cross-sectional view of a rotary joint attached to a conventional mixer with a heating device.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. FIG. 1 is a side view showing the configuration of a powder mixer A of the present invention, and FIG. 2 is a front view of the mixer A. As shown in FIG.

1 and 2, reference numeral 1 denotes a support shaft rotatably attached to a fixed base 2 via a bearing (not shown). A swing table 3 is fixed to the support shaft 1, and is swung or tilted at a predetermined angle with respect to the fixed table 2 by a first electric motor (not shown).

2, 4a and 4b shown in FIG. 2 are rotary shafts rotatably supported by bearings (not shown) on the fixed base 2, and 5a and 5b are attached to the rotary shafts 4a and 4b and rotated by a second electric motor (not shown). It is a rotating wheel that A rotating drum 6 is placed on rotating wheels 5a and 5b and rotated by the rotation of the rotating wheels 5a and 5b.

7a and 7b shown in FIG. 1 are a pair of oscillating rings attached in the circumferential direction of the rotating drum 6, and 8 is arranged between the pair of oscillating rings 7a and 7b to provide a mechanism for oscillating/tilting the rotating drum 6. It is an oscillating wheel that sometimes contacts one of the oscillating rings 7a and 7b to keep the rotating drum 6 rotating and prevent the rotating drum 6 from sliding down from the oscillating table 1. FIG.

A heater cover 9 is attached to the rocking table 1 by a hinge (not shown) so that it can be opened and closed. I have. A heater 10 is mounted inside the heater cover 9 .

Reference numeral 11 denotes a feeding pipe for supplying gas, water, or a liquid such as a solution into the rotating drum 6; 12, a rotary joint inserted through the feeding pipe 11 and attached to one end (right end in FIG. 1) of the rotating drum 6; is.

Reference numeral 13 shown in FIG. 1 denotes a filter unit, which is a main part of the present invention, attached to and detached from an inlet/outlet for introducing or discharging powder into or from the rotating drum 6, and 14 is connected to the filter unit 13. The degassing pipe 15 shown in FIG. .

FIG. 3 shows the structure of the filter unit 13 in detail. The filter unit 13 is composed of a bottomed hollow cylindrical filter case 17 having an attachment port 16 attached to the loading/unloading port of the rotating drum 6 and a rotary joint 18 attached to the bottom of the filter case 17 .

The filter case 17 is composed of a hollow cylindrical case body 17a having the mounting opening 16 and a case bottom 17b connected to the case body 17a by a clamp 19. As shown in FIG.

A fixing plate 21 attached by fixing means 20 such as screws is fixed to the case bottom portion 17b, and a filter 23 is attached to the fixing plate 21 by fixing means 22 such as screws. A ventilation hole 21a is formed in the central portion of the fixed plate 21. As shown in FIG.

The filter 23 is sewn into a cylindrical shape with a bottom, and its opening 23a is aligned with the ventilation hole 21a of the fixing plate 21, and the bottom 23b is placed in the filter case 17 with its bottom 23b directed toward the mounting opening 16 of the filter body 17a. Contained.

The rotary joint 18 includes a rotary cylinder 26 fixed to the stepped portion 24 of the case bottom 17b by a fixing means 25 such as a screw, and a bearing 27 fitted in the rotary cylinder 26. A fixed cylinder 28 forming part of the degassing pipe 14 is fitted on the peripheral surface through the stepped portion 24 and the case bottom portion 17b to allow the inside of the degassing pipe 14 and the inside of the filter case 17 to communicate with each other.

A seal member 29 for rotation is attached between the stepped portion 24 and the fixed cylinder 28 and helps the filter case 17 to rotate smoothly around the fixed cylinder 28 .

A thermocouple 30 passes through the degassing pipe 14, passes through the ventilation hole 21a of the fixing plate 21, the opening 23a of the filter 23, and enters the filter body 17a. .

Next, the operation of mixing powder by the powder mixer A shown in FIG. 1 will be described. First, when the filter unit 13 shown in FIG. 3 is removed from the powder mixer A shown in FIG. 1, the loading/unloading port of the rotary drum 6 is open.

In this state, the powder to be mixed is introduced into the rotary drum 6 through the inlet/outlet port of the rotary drum 6, and then the filter unit 13 is attached to the rotary drum 6 as shown in FIG. Attachment and detachment of the filter unit 13 and the rotary drum 6 can be easily performed by using a clamp (not shown).

After the filter unit 13 is attached, the vacuum pump 31 shown in FIG. Vacuum degassing is performed through the filter 23 of the filter unit 13. Since the filter 23 is sewn into a cylindrical shape with a bottom, a sufficient amount of ventilation can be secured and vacuum degassing can be smoothly performed.

Further, during vacuum degassing, the powder in the rotary drum 6 is sucked into the filter unit 13 shown in FIG. Only air passes through the filter 23 and is deaerated from the opening 23 a through the air vent 21 a and the deaeration pipe 14 , while the powder remains in the filter case 17 of the filter unit 13 .

Therefore, it is possible to prevent the powder in the rotating drum 6 from entering the degassing pipe 14 side. You can definitely prevent an intrusion.

After the inside of the rotating drum 6 is vacuum-evacuated, the heater 10 is energized to rotate the rotating wheels 5a and 5b shown in FIG. Then, the powder is dried and mixed.

At this time, according to the present invention, the rotary drum 6 is not swung but rotated while maintaining a substantially horizontal state. This prevents the powder in the rotating drum 6 from entering the filter unit 13 due to the mixing operation.

As the rotary drum 6 rotates, the filter unit 13 attached to the inlet/outlet port of the rotary drum 6 also rotates. The rotation of the filter unit 13 does not cause the degassing pipe 14 to rotate.

As described above, the presence of the filter 23 prevents the powder from directly contacting the case bottom 17b and the fixed cylinder 28. Therefore, the powder enters from between the fixed cylinder 28 and the stepped portion 24, thereby assisting the rotational movement. Wear and damage of the member 29 can be prevented. Furthermore, it does not penetrate into the mounting portion of the bearing 27 and damage it.

The heating temperature of the heater 10 during the mixing process in this manner is measured by the radiation thermometer 32 shown in FIG. 2, and is controlled and managed at an appropriate temperature. Also, the temperature near the filter 23 is measured by a thermocouple 30 shown in FIG. 3, and is controlled and managed at an appropriate temperature.

When it is necessary to add a liquid such as water or a solution to the powder, it is supplied into the rotary drum 6 through the feed pipe 11 shown in FIG. , the feeding tube 11 does not rotate even when the rotary drum 6 rotates.

After the powder has been mixed, power supply to the heater 10 and rotation of the rotating drum 6 are stopped, and the filter unit 13 is removed from the rotating drum 6 . As a result, the loading/unloading port of the rotary drum 6 is opened, so that the first electric motor (not shown) tilts the swing table 3 so that the loading/unloading port of the rotary drum 6 faces downward. Then, the powder is recovered from the inlet/outlet into a recovery container or the like (not shown).

At this time, in the present invention, since the powder is mixed only by the rotation of the rotary drum 6 without being swung, the amount of the powder in the rotary drum 6 entering into the filter unit 13 can be suppressed as much as possible. The amount of powder collected from the drum 6 can be increased.

Further, in the present invention, as shown in FIG. 3, the filter 23 is arranged outside the rotary drum 6, so unlike the conventional mixer C shown in FIG. This eliminates the problem of powder residue when collecting powder.

Furthermore, since the filter 23 is arranged outside the rotary drum 6, there is an advantage that the inside of the rotary drum 6 can be easily cleaned.

FIG. 4 shows a filter unit 33 according to another embodiment of the invention. The case bottom portion 17b and the rotary joint 18 that constitute the filter unit 33 have the same structures as those shown in FIG.

In FIG. 4, reference numeral 34 denotes a case body portion connected by a clamp to the case bottom portion 17b of the filter case 35. A hollow cylindrical body portion 34a and a substantially conical throttle portion 34b formed continuously from the body portion 34a. , and a connecting portion 34c continuing from the narrowed portion 34b.

A fixing plate 36 is fixed to the case bottom 17b by fixing means 20, and a filter 37 is fixed to the fixing plate 36 by fixing means 22. In this embodiment, a plurality of filters are attached.

The structure of the filter 37 is similar to that of the filter 23 described with reference to FIG. 3, and is woven into a cylindrical shape with a bottom. mounted toward the

By constructing the filter unit 33 in this manner, the fixed plate 36 is formed with the same number of ventilation holes 36a as the filters 37. Therefore, it is possible to secure a sufficient amount of ventilation when the inside of the rotary drum 6 is vacuum degassed. can be done.

In addition, since there are a plurality of filters woven into a hollow cylindrical shape, a large filter area can be secured, and there is the advantage that clogging due to powder is less likely to occur during vacuum degassing.

In the filter unit 33 shown in FIG. 4 as well, powder does not come into direct contact with the stepped portion 24 of the rotary joint 18 and the fixed cylinder 28 due to the presence of the filter 37. During rotation, the powder does not come into contact with the rotary seal member 29 to wear or damage it, nor does it enter the mounting portion of the bearing 27 and damage it.

The filter unit 33 shown in FIG. 4 is connected between the connection portion 34c and the loading/unloading port of the rotating drum 6 via a connection adapter 38 using a clamp (not shown). FIG. 5 shows a side view of the powder mixer B with the filter unit 33 connected. 6 is a front view of the powder mixer B. FIG.

In addition, since the filter unit 33 shown in FIG. 4 accommodates a plurality of filters 36 in the filter case 35, the size and weight of the filter unit 33 are increased. Therefore, in the present invention, a drop prevention device 39 is used to prevent accidental dropping of the large and heavy filter unit 33 on and off the rotary drum 6 .

As shown in FIGS. 5 and 6, the fall prevention device 39 includes a vertical arm 41 erected on a fixed arm 40 whose one end is fixed to the swing table 3, and a vertical arm 41 extending laterally (toward the rotating drum 6) from the upper end of the vertical arm 41. ), a lifting feed screw 43 erected at the tip of the horizontal arm 42, and a hooking piece 44 that moves up and down on the lifting feed screw 43 by operating a lifting handle 44. ing.

Hanging jigs 46a and 46b shown in FIG. The chain 47 can be hooked on the hooking piece 45 of the fall prevention device 39 .

When the filter unit 33 is to be attached/detached to/from the loading/unloading port of the rotating drum 6, the lifting handle 44 shown in FIGS. is lifted, the filter unit 33 is attached to and detached from the rotating drum 6 using a clamp (not shown). As a result, it is possible to reliably prevent the large and heavy filter unit 33 from falling during the attachment/detachment work.

As described above, according to the mixers A and B with the heating device of the present invention, since the rotary seal member 29 attached between the filters 23, 37 and the rotary joint 18 is positioned behind the filters 23, 37, , the powder will not enter the mounting position of the rotary seal member 29, wear and damage the seal member 29, or enter the mounting position of the bearing 27 of the rotary joint 18 to damage it. .

Moreover, since the filters 23 and 37 are attached to the outside of the rotating drum 6, a large filter area can be secured, a sufficient amount of ventilation can be secured, and clogging with powder can be prevented.

Furthermore, since the powder is mixed without rocking the rotary drum 6, the powder does not enter the filter units 13 and 33 attached to the outside of the rotary drum 6. - 特許庁

In addition, since the filters 23 and 37 are attached to the outside of the rotating drum 6, it is possible to prevent powder residue from being left inside the rotating drum 6 when the powder is discharged, and the inside of the rotating drum 6 can be easily cleaned.

Moreover, if the fall prevention device 39 is used, it is possible to reliably prevent a fall accident when the large and heavy filter unit 33 is attached to or detached from the rotating drum 6 .

The present invention is applicable to powder mixers.

1,103 support shaft 2,102 fixed base 3,101 rocking table 4a, 4b, 109 rotating shaft 5a, 5b, 110 rotating wheel 6,113 rotating drum 7a, 7b, 114 rocking ring 8,115 rocking wheel 9 Heater cover 10, 121 Heater 11, 123 Feed pipe 12, 18, 119 Rotary joint 13, 33 Filter unit 14 Degassing pipe 15 Air knocker 16 Mounting port 17, 35 Filter case 17a Case body 17b Case bottom 19 Clamp 20, 22,25 fixing means 21,36 fixing plate 21a,36a ventilation hole 23,37,122a filter 23a,37a opening 23b,37b bottom 24 step 26,130 rotating cylinder 27,128 bearing 28,129 fixed cylinder 29,133 Seal member for rotation 30, 124 Thermocouple 31 Vacuum pump 32 Radiation thermometer 34 Case body 34a Body 34b Diaphragm 34c Connecting part 38 Connection adapter 39 Fall prevention device 40 Fixed arm 41 Vertical arm 42 Horizontal arm 43 Feed screw for lifting 44 Elevating handle 45 Hook piece 46a, 46b Hanging jig 47 Hanging chain 48a, 48b Hanging hook 104 Crank mechanism 105 Reduction gear 106, 108a Output shaft 107a, 107b Link mechanism 108 First electric motor 111 Second electric motor 116 Lower cover 117 Upper cover 118 Lid 120 Heat insulating material 122 Flow pipe 125 Support arm 126 Locking piece 127 Detent plate 124a Protection pipe 131a, 131b Support plate 132 Lead wires A, B, C Powder mixer (mixing with heating device) machine)

Claims (3)

A substantially bottomed cylindrical filter case comprising a case body and a case bottom, and a bottomed hollow cylindrical filter case provided with a mounting port to be attached to the powder inlet/outlet of the rotating drum and attached to the outside of the rotating drum . with its bottom directed toward the powder inlet/outlet of the rotating drum, the opening being fixed to a fixed plate provided with a vent communicating with the opening, and the fixed plate being fixed to the bottom of the case. A filter fixed and housed in the filter case by attaching the filter case to the outer periphery of the degassing pipe attached to the bottom of the filter case on the side opposite to the fixed side of the filter, and the filter case around the degassing pipe. A filter unit for a powder mixer, comprising: a rotary joint for rotating the rotary joint; and a seal member for rotation between the rotary joint and the degassing pipe. A substantially bottomed cylindrical filter consisting of a case body, a case bottom, and a constricted portion, which is attached to the outside of the rotating drum with a connecting portion connected to a connection adapter attached to the powder inlet/outlet of the rotating drum. A case and a bottomed hollow cylindrical shape are formed, the bottom of which faces the powder inlet/outlet of the rotating drum, the opening of which is fixed to a fixed plate having a ventilation hole communicating with the opening, A plurality of filters fixed and housed in the filter case by fixing the fixing plate to the bottom of the case, and an outer circumference of a degassing pipe attached to the bottom of the filter case on the side opposite to the side where the filters are fixed. and a rotary joint for rotating the filter case around the degassing pipe, and a seal member for rotation between the rotary joint and the degassing pipe. . 3. The filter case according to claim 1, wherein the filter case is provided with a jig for lifting the filter case when it is attached to or detached from the powder inlet/outlet of the rotary drum. powder mixer filter unit.

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