JP2021035663A - Filter unit for powder mixer - Google Patents

Abstract

To provide a powder mixer that can prevent powder from entering and damaging or breaking a rotary joint.SOLUTION: A filter unit 13 storing a filter therein can be attached and detached from a loading/discharging port through which powder is loaded and discharged from a revolving drum 6, whereby a rotary joint 18 is disposed while holding the filter unit 13 between the revolving drum 6 and the rotary joint.SELECTED DRAWING: Figure 1

Description

The present invention prevents powder from entering the rotary seal member of the rotary joint that rotates the rotary drum in a powder mixer equipped with a rotary drum, and prevents the seal member from being worn or damaged or the rotary joint from being damaged. It relates to an improved structure of a filter unit that can be reliably prevented.

Conventionally, a mixer that mixes powder materials put into a rotary drum by rotation of the rotary drum has been known. Further, a so-called mixer with a heating device is also known in which a heater is installed around the rotating drum and the powder material in the rotating drum is mixed while being heated by using the heat of the heater (the following patent documents). 1).

Special fair 5-42295

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

In FIGS. 7 and 8, 101 is a rocking table attached to the fixed table 102 by a support shaft 103, and 104 is a crank mechanism in which one end is connected to the rocking table 101.

The crank mechanism 104 is composed of links 107a and 107b in which the other end is connected to the output shaft 106 of the speed reducer 105, and the rotation of the output shaft 108a of the first electric motor 108 is performed by the speed reducer 105 in principle by the links 107a and 107b. It is transmitted to the rocking table 101, and the rocking table 101 is swung around the support shaft 103.

Reference numeral 109 denotes a rotating shaft that is rotatably attached to the rocking table 101 in the front-rear direction (horizontal direction in FIG. 7) via a bearing (not shown), and 110 indicates a rotating wheel that is attached to both ends of the rotating shaft 109. ..

Reference numeral 111 shown in FIG. 8 is a second electric motor for rotating the rotary wheel 110 via the belt 112, and 113 is a rotary drum rotatably mounted on the rotary wheel 110. Reference numeral 114 denotes a pair of swing rings attached in the circumferential direction near both ends of the rotary drum 113 in the longitudinal direction.

Reference numeral 115 denotes a swing wheel mounted on the swing table 101 on the lower side of the rotary drum 113 in close proximity to the inner surface of the swing ring 114. When the swing table 101 swings, the swing wheel 115 is on one side. While maintaining the rotation of the rotating drum 113 in contact with the rocking ring 114 of the above, the rotating drum 113 is prevented from sliding down from the rocking table 101.

The 116 is a lower cover fixed to the rocking table 101 and surrounding the lower part of the rotating drum 113, and swings together with the rocking table 101. 117 is an upper cover that is placed on the lower cover 116 and surrounds the rotating drum 113.

The upper cover 117 has an opening at a position corresponding to the rotary joint 119 attached to the lid 118 at the left end and the opening at the right end of the rotary drum 113 shown in FIG. 7, and is hinged to and from the lower cover 116. It can be opened and closed with respect to the lower cover 116.

Reference numeral 120 denotes a heat insulating material attached to the inner surface of the upper cover 117, and reference numeral 121 denotes a heater attached to the inside of the upper cover 117.

122 shown in FIG. 7 is a distribution pipe that evacuates the inside of the rotary drum 113 by inserting the inside of the rotary joint 119, and 122a is a powder in the rotary drum 113 when the inside of the rotary drum 113 is evacuated. Shows a filter that prevents the drum from being sucked into the circulation pipe 122. Reference numeral 123 denotes a feeding pipe for sending gas, water, a solution or the like into the rotating drum 113, and reference numeral 124 denotes a thermocouple for detecting the powder temperature or the like in the rotating drum 113.

Reference numeral 125 denotes a support arm extending from the rocking table 101 to the upper front (upper right direction in FIG. 7), and a pair of locking plates 126 arranged at intervals are attached to the tip of the support arm, and are attached to the outside of the rotating drum 113. By engaging the stop plate 127 attached to the lower part of the position circulation pipe 122, the circulation pipe 122, the supply pipe 123, and the thermocouple 124, which will be described later, rotate through the rotary joint 119. Stop.

FIG. 9 is an enlarged vertical sectional view of the rotary joint 119. The rotary joint 119 is attached to one end of the rotary drum 113 for rotating the rotary drum 113, and is connected to a fixed cylinder 129 in which a bearing 128 is fitted on the outer circumference and one end of the rotary drum 113. It is composed of a rotary cylinder 130 that rotates around a fixed cylinder 129 using a bearing 128.

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

The thermocouple 124 is led out from the support plate 131b to the outside of the rotary drum 6 by the protective pipe 124a, and then is connected to the lead wire 132. A rotation seal member 133 that assists the rotation of the rotary cylinder 130 is attached between the fixed cylinder 129 and the rotary cylinder 130.

Note that 134 shown in FIG. 7 is a refracting joint that enables the flow pipe 122 to be refracted in response to the swing of the rocking table 101. The feed pipe 123 can cope with a swinging motion by using a flexible resin pipe.

According to the mixer B with a heating device configured as described above, the rotating drum 113 rotates and swings, and the powder material contained therein is agitated and mixed while being heated by the heat of the heater.

However, in the mixer B with a heating device shown in FIGS. 7 to 9, the rotary drum 113 rotates while swinging, and the powder charged into the rotary drum 113 is heated and mixed, so that the powder in the rotary drum 113 is heated and mixed. Contact the rotary joint 119 shown in FIG.

The powder that comes into contact with the rotary joint 119 invades the inside through the gap between the fixed cylinder 129 and the rotary cylinder 130, and comes into contact with the seal member 133 for rotation, which causes the seal member 133 to be worn or damaged. It was.

In particular, when a liquid such as water or a solution is sprayed into the rotary drum 113, if the liquid comes into direct contact with the fixed cylinder 129 or the rotary cylinder 130, the 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 easily penetrates into the gap between the fixed cylinder 129 and the rotating cylinder 130, which tends to cause damage to the sealing member 133 and damage to the bearing 128.

Further, since the filter 122a is located in the rotating drum 113, the filter area cannot be increased, a sufficient air flow rate cannot be secured, and clogging due to adhesion of powder has been caused.

Moreover, as the rotating drum 113 rotates and swings, the powder in the rotating drum 113 is placed on the filter 122a, so that when the powder is discharged from the rotating drum 113, the powder remains in the rotating drum 113. Was likely to occur, leading to a decrease in the recovery rate of powder.

Therefore, an object of the present invention is to provide a filter unit of a powder mixer capable of solving various problems of the conventional mixer B.

The filter unit according to claim 1 is attached to a substantially bottomed cylinder-shaped filter case attached to and detached from a powder input / discharge port of a rotary drum, a filter housed in the filter case, and a bottom portion of the filter case. A rotary joint for rotating the filter case is provided around the degassing pipe on the outer periphery of the degassing pipe, and a rotation seal member is provided between the rotary joint and the degassing pipe.

In the invention according to claim 2, the filter constituting the filter unit according to claim 1 has a bottomed hollow cylinder shape, the bottom thereof is directed toward the powder input / discharge port of the rotary drum, and the opening is opened. It is characterized in that it is fixed to a fixing plate having a ventilation hole that communicates with the portion, and is fixed and accommodated in the filter case by the fixing plate.

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

According to the invention of claim 1, since the rotary joint is provided at the rear stage position of the filter, the rotary seal member of the rotary joint does not come into contact with powder or liquid, and the filter is damaged or the rotary joint is damaged. The problem of bearing breakage can be solved.

According to the invention of claim 2, by forming the filter into a hollow cylinder shape, it is possible to secure a sufficient air flow rate of the filter, secure a filter area, and prevent clogging of the filter by powder. ..

According to the third aspect of the present invention, when the filter unit is attached / detached to / from the powder input / discharge port of the rotary drum, a jig for lifting the filter unit is provided. Can be prevented.

It is a side view of the powder mixer which attached the filter unit of this invention. It is a front view of the powder mixer which attached the filter unit of this invention. It is an enlarged vertical sectional view of the filter unit of this invention. It is an enlarged vertical sectional view of the filter unit which concerns on other Examples of this invention. It is a side view of the powder mixer which attached the filter unit which concerns on another Example of this invention. It is a front view of the powder mixer which attached the filter unit which concerns on another Example of this invention. It is a side view which shows the conventional mixer with a heating device. It is a front view which shows the conventional mixer with a heating device. It is an enlarged vertical sectional view of a rotary joint attached to a mixer with a conventional heating device.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a side view showing the configuration of the powder mixer A of the present invention, and FIG. 2 is a front view of the mixer A.

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

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

7a and 7b shown in FIG. 1 are a pair of swinging rings attached in the circumferential direction of the rotating drum 6, and 8 is arranged between the pair of swinging rings 7a and 7b and swing / tilt the rotating drum 6. These are swing wheels that sometimes come into contact with one of the swing rings 7a and 7b to maintain the rotation of the rotary drum 6 and prevent the rotary drum 6 from sliding down from the swing table 1.

Reference numeral 9 denotes a heater cover mounted on the rocking table 1 so as to be openable and closable by a hinge or the like (not shown), and both ends thereof (left-right end portions in FIG. 1) have openings at which the longitudinal end portions of the rotary drum 6 are opened. I have. Reference numeral 10 denotes a heater installed in the heater cover 9.

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

13 shown in FIG. 1 shows a filter unit which is a main part of the present invention and is attached to and detached from a charging / discharging port for charging or discharging powder into the rotating drum 6, and 14 is connected to the filter unit 13. Reference numeral 15 shown in FIG. 2 is an air knocker attached in the middle of the degassing pipe 14 to give an impact to eliminate powder adhesion / clogging inside the degassing pipe 14. ..

FIG. 3 shows the structure of the filter unit 13 in detail. The filter unit 13 is composed of a substantially bottomed hollow tubular filter case 17 having a mounting port 16 attached to an input / discharge port of the rotary 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 tubular case body 17a provided with the attachment port 16 and a case bottom 17b connected to the case body 17a by a clamp 19.

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

The filter 23 is sewn into a bottomed cylindrical shape, the opening 23a is matched with the ventilation hole 21a of the fixing plate 21, and the bottom 23b is inside the filter case 17 with the bottom 23b facing the mounting port 16 side of the filter body 17a. It is contained.

The rotary joint 18 includes a rotary cylinder 26 fixed to a step 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 a part of the degassing pipe 14 is fitted on the peripheral surface through the step portion 24 and the case bottom portion 17b to communicate the inside of the degassing pipe 14 and the inside of the filter case 17.

Reference numeral 29 denotes a rotation seal member attached between the step portion 24 and the fixed cylinder 28, which helps the filter case 17 to smoothly rotate around the fixed cylinder 28.

Reference numeral 30 denotes a thermocouple that passes through the degassing pipe 14, passes through the ventilation hole 21a of the fixing plate 21, passes through the opening 23a of the filter 23, and advances into the filter body 17a, and measures the surface temperature of the bottom 23b of the filter 23. ..

Next, the operation when the powder is mixed by the powder mixer A shown in FIG. 1 will be described. First, in a state where the filter unit 13 shown in FIG. 3 is removed from the powder mixer A in FIG. 1, the input / discharge port of the rotary drum 6 is open.

In this state, the powder to be mixed is charged into the rotary drum 6 from the input / discharge port of the rotary drum 6, and then the filter unit 13 is attached to the rotary drum 6 as shown in FIG. The filter unit 13 and the rotating drum 6 can be easily attached / detached by using a clamp (not shown).

After the filter unit 13 is attached, the inside of the rotary drum 6 is evacuated through the degassing pipe 14 by the vacuum pump 31 shown in FIG. The vacuum degassing is performed through the filter 23 of the filter unit 13, but since the filter 23 is sewn into a bottomed cylindrical shape, a sufficient air volume can be secured and the vacuum degassing is smoothly performed.

Further, when vacuum degassing, the powder in the rotary drum 6 is sucked into the filter unit 13 shown in FIG. 3, but since the filter 23 is housed in the filter unit 13, the powder in the rotary drum 6 is contained. Only air passes through the filter 23 and is degassed from the opening 23a through the vents 21a and the degassing pipe 14, and the powder remains in the filter case 17 of the filter unit 13.

Therefore, since the powder in the rotary drum 6 can be prevented from entering the degassing pipe 14 side, the powder does not come into direct contact with the case bottom 17b and the fixed cylinder 28, and is between the fixed cylinder 28 and the step portion 24. You can surely prevent the invasion.

After vacuum degassing the inside of the rotary drum 6, the heater 10 is energized, the rotary wheels 5a and 5b shown in FIG. 2 are rotated by a second electric motor (not shown), and the rotary drum 6 on the rotary wheels 5a and 5b is rotated. Then, the powder is mixed while being dried.

At this time, in the present invention, the rotating drum 6 is not oscillated and is rotated while maintaining a substantially horizontal state. As a result, it is possible to prevent the powder in the rotary drum 6 from entering the filter unit 13 due to the mixing processing operation.

The rotation of the rotary drum 6 also rotates the filter unit 13 attached to the input / discharge port of the rotary drum 6, but since the filter unit 13 is connected to the fixed cylinder 28 via the bearing 27 of the rotary joint 18, the filter unit 13 is connected to the fixed cylinder 28. The degassing pipe 14 does not rotate due to the rotation of the filter unit 13.

As described above, since the powder does not come into direct contact with the case bottom 17b and the fixed cylinder 28 due to the presence of the filter 23, the powder penetrates between the fixed cylinder 28 and the stepped portion 24 to assist the rotation operation. It is possible to prevent the member 29 from being worn or damaged. Further, it does not invade the mounting portion of the bearing 27 and damage it.

The heating temperature by the heater 10 during the mixing process in this way is measured by the radiation thermometer 32 shown in FIG. 2, and is controlled and controlled to an appropriate temperature. Further, the temperature near the filter 23 is measured by the thermocouple 30 shown in FIG. 3, and is controlled and controlled to 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. 1, but the feed pipe 11 is supplied into the rotary drum 6 through the rotary joint 12. The feed pipe 11 does not rotate even when the rotating drum 6 rotates.

When the mixing of the powder is completed, the energization of the heater 10 and the rotation of the rotating drum 6 are stopped, and the filter unit 13 is removed from the rotating drum 6. As a result, the input / discharge port of the rotary drum 6 is opened. Therefore, the swing table 3 is tilted by a first electric motor (not shown), and the load / discharge port of the rotary drum 6 is tilted downward. Then, the powder is collected from the input / discharge port into a collection container or the like (not shown).

At this time, in the present invention, since the powder is mixed only by the rotation of the rotating drum 6 without shaking, the amount of the powder in the rotating drum 6 invading into the filter unit 13 can be suppressed as much as possible, and the rotation can be suppressed. The amount of powder recovered from the drum 6 can be increased.

Further, in the present invention, since the filter 23 is arranged outside the rotating drum 6 as shown in FIG. 3, unlike the conventional mixer C shown in FIG. 7, the powder rides on the filter 122a in the mixing process. It is possible to solve the problem that the powder remains when the powder is collected.

Further, since the filter 23 is arranged outside the rotating drum 6, it also has an advantage that the inside of the rotating drum 6 can be easily cleaned.

FIG. 4 shows a filter unit 33 according to another embodiment of the present invention. Since the case bottom 17b and the rotary joint 18 constituting the filter unit 33 have the same structure as those shown in FIG. 3, the same members are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 4, reference numeral 34 denotes a case body portion connected to the case bottom portion 17b of the filter case 35 by a clamp, which is a hollow cylindrical body portion 34a and a throttle portion 34b formed in a substantially conical shape continuously from the body portion 34a. And a connecting portion 34c continuous from the throttle portion 34b.

Reference numeral 36 denotes a fixing plate fixed to the bottom 17b of the case by the fixing means 20, and 37 indicates a filter fixed to the fixing plate 36 by the fixing means 22, and in this embodiment, a plurality of filters are attached.

The structure of the filter 37 is woven into a bottomed cylindrical shape like the filter 23 described with reference to FIG. 3, the opening 37a is matched with the ventilation hole 36a formed in the fixing plate 36, and the bottom portion 37b is on the throttle portion 34b side. It is attached toward.

By configuring the filter unit 33 in this way, the fixing plate 36 is formed with the same number of ventilation holes 36a as the filter 37, so that a sufficient amount of ventilation when vacuum degassing the inside of the rotating drum 6 is secured. Can be done.

Further, since there are a plurality of filters woven into a hollow cylinder shape, the filter area can be widened, and there is an advantage that clogging due to powder is less likely to occur during vacuum degassing.

Also in the filter unit 33 shown in FIG. 4, since the powder does not come into direct contact with the stepped portion 24 and the fixed cylinder 28 of the rotary joint 18 due to the presence of the filter 37, the stepped portion 24 is located around the fixed cylinder 28. When rotating, the powder does not come into contact with the rotating seal member 29 to wear or damage it, or it does not invade 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 input / discharge port of the rotary 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. FIG. 6 is a front view of the powder mixer B.

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 increase. Therefore, in the present invention, a fall prevention device 39 for preventing a fall accident when the large and heavy filter unit 33 is attached to and detached from the rotating drum 6 is utilized.

As shown in FIGS. 5 and 6, the fall prevention device 39 has a vertical arm 41 standing on a fixed arm 40 having one end fixed to the swing table 3 and a horizontal direction (rotating drum 6 side) from the upper end of the vertical arm 41. ), An elevating feed screw 43 that stands at the tip of the lateral arm 42, and a hook piece 44 that moves up and down on the elevating feed screw 43 by operating the elevating handle 44. ing.

The hanging jigs 46a and 46b shown in FIG. 5 are attached to the filter unit 33, and the hanging hooks 48a and 48b attached to both ends of the hanging chain 47 are inserted into the hanging jigs 46a and 46b for hanging. The chain 47 can be hooked on the hook piece 45 of the fall prevention device 39.

Then, when the filter unit 33 is attached to or detached from the input / discharge port of the rotary drum 6, the elevating handle 44 shown in FIGS. 5 and 6 is operated to pass the filter unit 33 via the hook piece 45 and the suspension chain 47. The filter unit 33 is attached to and detached from the rotating drum 6 by using a clamp (not shown). As a result, it is possible to reliably prevent a large and heavy filter unit 33 from falling during the attachment / detachment work.

As described above, according to the mixers A and B with a heating device of the present invention, the rotary seal member 29 attached between the filters 23 and 37 and the rotary joint 18 is located at the rear stage of the filters 23 and 37. , The powder does not invade the mounting position of the rotary seal member 29, and does not wear or damage the seal member 29 or invade the mounting position of the bearing 27 of the rotary joint 18 and damage it. ..

Further, since the filters 23 and 37 are attached to the outside of the rotating drum 6, the filter area can be increased, a sufficient air flow rate can be secured, and clogging of powder can be prevented.

Further, since the powder is mixed without causing the rotary drum 6 to oscillate, the powder does not enter the filter units 13 and 33 attached to the outside of the rotary drum 6.

Further, since the filters 23 and 37 are attached to the outside of the rotary drum 6, it is possible to prevent powder residue from being generated in the rotary drum 6 when the powder is discharged, and it is easy to clean the inside of the rotary drum 6.

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 and detached from the rotating drum 6.

The present invention is applicable to powder mixers.

1,103 Support shaft 2,102 Fixed base 3,101 Swing base 4a, 4b, 109 Rotating shaft 5a, 5b, 110 Rotating wheel 6,113 Rotating drum 7a, 7b, 114 Swing ring 8,115 Swing wheel 9 Heater cover 10,121 Heater 11,123 Feed pipe 12,18,119 Rotary joint 13,33 Filter unit 14 Degassing piping 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 Vents 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 Rotating seal member 30,124 Thermocouple 31 Vacuum pump 32 Radiation thermometer 34 Case body 34a Body 34b Squeezing part 34c Connection 38 Connection adapter 39 Fall prevention device 40 Fixed arm 41 Vertical arm 42 Horizontal arm 43 Lifting feed screw 44 Lifting handle 45 Hooking piece 46a, 46b Hanging jig 47 Hanging chain 48a, 48b Hanging hook 104 Crank mechanism 105 Reducer 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 Insulation material 122 Flow pipe 125 Support arm 126 Locking piece 127 Stop plate 124a Protective pipe 131a, 131b Support plate 132 Lead wire A, B, C Powder mixer (mixing with heating device) Machine)

Claims (3)

The filter case having a substantially bottomed cylinder shape attached to and detached from the powder input / discharge port of the rotating drum, the filter housed in the filter case, and the outer periphery of the degassing pipe attached to the bottom of the filter case. A filter unit of a powder mixer, characterized in that a rotary joint for rotating the filter case is provided around a degassing pipe, and a rotating seal member is provided between the rotary joint and the degassing pipe. The filter has a bottomed hollow cylinder shape, the bottom of which is directed toward the powder input / discharge port of the rotary drum, and the opening is fixed to a fixing plate having a ventilation hole communicating with the opening. The filter unit of the powder mixer according to claim 1, wherein the filter unit is fixed and housed in the filter case by the fixing plate. The method according to claim 1 or 2, wherein the filter case is provided with a jig for lifting the filter case when it is attached to and detached from the powder input / discharge port of the rotary drum. Filter unit of powder mixer.

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