JP2012026704A - Air supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air supply device capable of efficiently drying a work by homogenizing an in-furnace temperature, and applicable to a horizontal rotary type container free from formation of an air outlet and an air inlet on the container and piping as an air pathway on a large scale.SOLUTION: This air supply device includes a discharge pipe including a nose section for supplying the air into the container, a suction pipe coaxially positioned on an outer periphery of the discharge pipe and discharging the air in the container, a connecting means for mounting the discharge pipe and the suction pipe on the container, and an air generating device connected to the discharge pipe through an air distribution pipe or to the suction pipe through an air supply pipe. The discharge pipe, the suction pipe and the connecting means are integrally formed, the outlet at a tip of the discharge pipe is projected at the nose section with respect to the inlet at a tip of the suction pipe, so that they are separated from each other in the container. The air generating device and the inside of the container are configured to circulate the air, and the container is configured rotatably on the discharge pipe, the suction pipe and the connecting means as rotating shafts.

Description

  The present invention relates to an apparatus for supplying air into a container, and more particularly to an air supply apparatus suitable for drying a work in a sealed container with air.

A device that dries a workpiece placed in a sealed container (inside the furnace) with hot air or other air, discharges the hot air from the hot air generating means into the furnace, and discharges the hot air inside the furnace outside the furnace. Each of the furnaces is provided with a suction port, but due to the difference in the cross-sectional area of the discharge port and the furnace, a pressure drop due to pressure diffusion when air is discharged into the furnace is unavoidable. When the discharge port and the suction port are provided on the same wall surface of the furnace body or at positions close to each other, the escape (circulation) of the discharged hot air is poor and the flow of air stagnates in the furnace until the back of the container There is a problem that the hot air does not reach, the temperature in the furnace becomes non-uniform, and the drying efficiency is deteriorated. In order to alleviate this problem, it is known to provide the discharge port and the suction port on the opposite wall surfaces of the furnace body, or to provide a fan for stirring hot air in the furnace body.
As the above, for example, hot air generated by a hot air generator is blown into the furnace from the blowout port, and hot air generated in the furnace is used to generate hot air from the hot air suction port provided on the wall facing the blowout port. A box-type drying furnace to be returned to the machine, and a shielding plate is installed at a position along the side of the material to be dried in the furnace so that hot air circulates in the furnace, and the side opposite to the material to be dried of the shielding plate A box-type drying furnace has been proposed that is provided with an in-furnace fan that forms a circulating hot air circulation flow between them. (Patent Document 1)

  In addition, as a rotary hot air drying device that stirs the air in the drying chamber to make the temperature as uniform as possible and uniformly dry the entire surface of the work, hot air is supplied to the circumferential surface of a cylindrical furnace. A plurality of hot air outlets provided through the furnace wall for blowing into the inside, a rotary table mounted on the bottom of the furnace chamber so as to be able to rotate in the horizontal direction, and projecting at the center of the rotary table, A hot air exhaust hollow shaft provided with a hot air suction hole to be exhausted and a waste heat duct for exhausting the waste heat of the hot air exhaust hollow shaft, hot air is blown out from the outer periphery of the furnace, There has been proposed a vertical rotary hot-air drying apparatus that discharges to the upper part of the furnace through a hollow shaft. (Patent Document 2)

Japanese Unexamined Patent Publication No. 6-034268 JP 2001-91154 A

In the hot air supply means of the conventional hot air drying furnace, in order to make the furnace temperature as uniform as possible, a hot air outlet and a hot air inlet are considered in consideration of a smooth hot air flow in the furnace. In the wall of the facing surface of the furnace, in Patent Document 2, a distance is provided between the hot air outlet and the hot air inlet, such as the position from the furnace wall side and the center axis of the furnace to the upper surface. Attach to position.
However, according to such means, there is a problem that an attachment means is required for each of the blowout port and the suction port, and that the apparatus becomes large, for example, the piping of the hot air passage becomes large.
In particular, as in Patent Document 2, in a rotary type furnace that rotates by rotating the furnace and drying, the attachment of the blowout port and the suction port serving as air supply means is limited to a non-rotating part that does not rotate, or Since it is necessary to provide a means that does not rotate for the attachment, there is a concern that the vertical rotary type container as in Document 2 may complicate the apparatus with a horizontal rotary type container.

Therefore, the present invention allows the air to flow smoothly in the container, thereby making the temperature in the furnace uniform and drying the work efficiently, as well as attaching an air discharge port and a suction port to the container, An object of the present invention is to provide an air supply device that does not require a large amount of piping as a passage for the air.
Moreover, it made it the subject to provide the air supply apparatus which can apply the said subject also to a horizontal rotary type container.

  The air supply device of the present invention is located on a discharge pipe provided with a nose portion that extends into the container for supplying air to the container, and an outer periphery that is substantially coaxial with the discharge pipe, and sucks and discharges air in the container. The discharge pipe and the suction pipe can be formed integrally, and the discharge port serving as the tip of the discharge pipe projects the nose portion from the suction port serving as the tip of the suction pipe. And are arranged as spaced apart from each other in the container.

Moreover, it is preferable that each part is set as the following structure.
-The inlet has a filter.
A stirring fan that is rotated by blowing air is provided at the tip of the discharge pipe.
-The discharge port of the said discharge pipe is provided in the surrounding surface of a discharge pipe front-end | tip part.

In addition to the configuration of the air supply device, the rear end portion of the discharge pipe is provided with an air generation device serving as an air supply source connected via an air supply pipe, and the rear end portion of the suction pipe is an air supply pipe. It is preferable that air is circulated between the air generator and the inside of the container.
Further, it is more preferable that the air generator is provided with a fresh air intake and a hot air outlet is provided in the path from the container to the air generator.

  Further, in addition to the configuration of the air supply device, the discharge pipe and the suction pipe are provided with connection means for attaching the container to the container, and the discharge pipe, the suction pipe and the connection means can be integrally formed, The discharge port serving as the nose tip of the discharge tube protrudes from the suction port serving as the tip of the suction tube and is positioned near the wall surface of the container that is distal from the connection means to the container, while the suction port is connected It may be formed in the vicinity of the means.

  Further, it is preferable that the container is formed to be rotatable, and the discharge pipe, the suction pipe, and the connecting means located inside the container are located on a rotation shaft.

  According to the above means, the discharge pipe and the suction pipe into the container are substantially coaxial, and the discharge pipe and the suction pipe are integrally formed including the connecting means for attaching to the container. The discharge port and the intake port can be attached to the container in one place, and the piping with the air generating means and the air exhaust port can be integrated in one direction. Also, the discharge tube is provided with a nose portion extending into the container, the discharge port protrudes from the suction port by the amount of the nose portion, and is arranged so as to be separated from each other in the container. By positioning the suction port in the vicinity of the connecting means, on the other hand, the discharge port and the suction port are located on the opposite wall surfaces at both ends so that they are separated from each other. Smoothly flows from the discharge port to the suction port, air stagnation in the furnace is suppressed, and the work can be dried by the air flow therebetween.

In addition, by providing a filter at the suction port, there is no concern that workpieces or dust will enter the suction pipe or the air generation device or be discharged to the outside, and the inside of the piping can be kept clean, and work loss is eliminated. Can do. Furthermore, it is more preferable that the filter is configured to be replaceable, such that the concern about efficiency reduction due to clogging of the filter can be eliminated.
In addition, if the discharge port is provided with a stirring fan that is rotated by blowing air, the air is stirred during discharge and the inside of the container can be made more uniform. No power source is required. Furthermore, by providing the discharge port on the peripheral surface of the discharge pipe tip, hot air discharge is diffused in all directions, further enhancing the agitation effect.
In addition, if the intake pipe is connected to the air inlet of the air generator via the intake pipe so that the heated air circulates between the container and the air generator, an energy-saving device that suppresses heat loss is obtained. In addition, by providing a fresh air intake port that takes in some fresh air from the intake port and an air outlet that discharges part of the air in the furnace to the outside, part of it is replaced with fresh and dry air The moisture drying effect can be enhanced.

  Further, the discharge pipe, the suction pipe, and the connection means are positioned on the rotation axis of the container, and the connection means includes means for rotating only the container without rotating the discharge pipe or the suction pipe. It can also be applied to a rotating container.

According to the air supply device of the present invention, as in the operation by the above means, the discharge port and the intake port can be attached to the container in one place, and the piping for the air generating means and the air exhaust port is also provided. By being able to concentrate in one direction, the attachment of the discharge port and the intake port to the container and the piping for the air passage are not large and can be made compact.
In addition, due to the positional relationship between the discharge port and the suction port as described above, air stagnation in the container is suppressed, and the flow of air can be made smoothly from the discharge port to the suction port, so that the furnace temperature is made uniform. , Can dry the work efficiently.
Furthermore, if the discharge pipe, the intake pipe, and the connecting means are positioned on the rotation axis of the container and this is used as a non-rotating part, it can be applied to a horizontal rotary type container.

  As described above, the present invention has an object of making the temperature inside the container as uniform as possible and drying the work efficiently, attaching a hot air discharge port and a suction port to the container, and an air passage. Therefore, it is possible to provide an air supply device that can be applied to a horizontal rotary type container.

The schematic diagram which shows embodiment of the hot air drying furnace using the air supply apparatus of this invention. The block diagram which shows the principal part of the air supply apparatus of the said embodiment. The schematic diagram which shows an example of the rotation means of the hot air drying furnace using the said air supply apparatus.

Hereinafter, embodiments of an air supply device of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic view showing an example of a hot air drying furnace using the air supply device of the present invention, and FIG. 2 is a block diagram showing the main part of the air supply device of the above-described embodiment.
The hot air drying furnace using the air supply device of this embodiment accommodates a workpiece (not shown) to be dried in a furnace body 1 formed as a horizontal cylindrical sealed container having a door 12 on one side, While the furnace body 1 is rotated around the central axis of the cylinder, hot air generated by the hot air generator 5 is blown into the furnace 11, and the hot air is blown into the furnace 11 by a rotary type drying furnace that dries the work with the hot air. A tubular discharge pipe 2 provided with a long nose portion 21 extending into the furnace 11 for supply, and a tube for inhaling and discharging air from the furnace 11 positioned on the outer periphery coaxial with the discharge pipe 2 The suction pipe 3 is positioned coaxially with the discharge pipe 2 and the suction pipe 3, and the discharge pipe 2 and the suction pipe 3 are arranged on one side surface of the furnace body 1 (in this embodiment, the side surface opposite to the door 12). Bore for rotatably attaching the furnace body 1 to the central axis of the cylinder A rotary connection means 41 such as a bearing, a connection means 4 provided with a flange 42 for fixing to the furnace body 1, an air supply pipe 6 to the discharge pipe 2, and an intake pipe to the suction pipe 3. 7 is basically configured by a supply source of heated air to the furnace 11 communicated via the heat source 7 and a hot air generator 5 serving as a circulation passage, and the discharge pipe 2, the suction pipe 3 and the connection means 4 are integrated on the same axis. The discharge port 22 that serves as a hot air outlet to the furnace 11 at the distal end of the discharge pipe 2 has a nose 21 than the suction port 31 at the distal end of the suction pipe 3 that serves as a hot air discharge port from the furnace 11. The portion is protruded and is located in the vicinity of the wall surface of the furnace body 1 (in the present embodiment, the door side wall surface) which is distal from the connection means 4 to the furnace body 1, while the suction port 31 is in the vicinity of the connection means 4. And the respective ports 22 and 31 serve as both ends of the furnace body 11. Provided spaced manner.

The discharge pipe 2 is a passage for blowing the hot air from the hot air generator 5 into the furnace 11 as described above. In this embodiment, the whole excluding the tip is formed of a stainless steel pipe having a pipe diameter of 75A, and is formed at the tip. A tip cap 26 having a plurality of hot-air discharge holes 23 formed on the circumferential side surface and serving as hot-air discharge ports 22 is attached. Further, the tip cap 26 is provided with a stirring fan 25 that rotates using the discharged hot air as a driving source and diffuses the hot air. On the other hand, the discharge pipe rear end portion 24 protrudes out of the furnace and is connected to the air supply pipe 6 which becomes a hot air passage from the hot air generator 5 to the discharge pipe 2.
The suction pipe 3 is a passage for discharging hot air supplied into the furnace 11 to the outside of the furnace, and becomes a double pipe outer pipe penetrating the discharge pipe 2 through the central axis. Except for the pipe connection part 35, the whole is formed of a stainless steel pipe having a pipe diameter of 150A, and the tip part serves as an inlet 31 for hot air from the inside of the furnace 11 to the outside of the furnace. A filter 32 in which several exchangeable donut-shaped stainless meshes are stacked to prevent entry of workpieces and dust is attached and covered with a filter cap 33, while the suction pipe rear end 34 is outside the furnace. In this embodiment, an intake pipe connection portion 35 having a pipe diameter of 75A is provided on the circumferential side surface in the vicinity of the rear end, and an intake pipe 7 serving as a hot air passage from the intake pipe 3 to the hot air generator 5 is provided. Connect to and configure .
As described above, the discharge pipe 2 and the suction pipe 3 are formed as a coaxial double pipe having the discharge pipe 2 as an inner pipe and the suction pipe 3 as an outer pipe, and the discharge port 22 serving as the tip of the discharge pipe is a suction pipe. The nose 21 portion is protruded from the inlet 31 which is the tip, and is positioned in the vicinity of one end of the furnace 11 (in this embodiment, the door side), while the inlet 31 is on the opposite side of the furnace. Positioned in the vicinity of the end, the discharge port 22 and the suction port 31 are arranged so as to be both ends of the furnace 11. The suction pipe rear end 34 is connected and fixed coaxially with the discharge pipe 2 by welding or the like.
Further, a hot air exhaust provided with an open / close lever 37 capable of adjusting the discharge amount for discharging the air in the furnace 11 to the outside from the circulation path, if necessary, at a position outside the furnace on the rear end side of the suction pipe 3. An outlet 36 is provided.

The connecting means 4 of the discharge pipe 2 and the suction pipe 3 to the furnace body 1 is a means that can rotate only the furnace body 1 without rotating the discharge pipe 2 and the suction pipe 3. A rotary connecting means 41 such as a known ball bearing or slip ring, which is integrally formed with the discharge pipe 2 and the suction pipe 3 and is coaxially mounted on the outer periphery close to the side; It is formed by a flange 42 that is fixed to the central axis of one side surface of the body 1 (in this embodiment, the side surface opposite to the door 12).
The furnace rotating means may be a mechanical means using a motor, a pulley, or the like of an embodiment described later, or an electric means using a slip ring or the like.

The hot-air generator 5 is a general hot-air generator provided with an exothermic heater that heats air inside and a fan that circulates air. The hot-air generator 5 supplies a blow-out port 51 that supplies hot air to the furnace 11 and the air in the furnace 11. A suction port 52 for returning to the apparatus is provided, the blow-out port 51 is connected to the rear end of the air supply pipe 6 connected to the discharge pipe rear end 24, and the suction port 52 is connected to the suction pipe rear connection 35. 7 is connected, and the hot air generated by the hot air generator 5 and jetted from the outlet 51 is discharged from the outlet 22 into the furnace 11 through the air supply pipe 6 and the discharge pipe 2, and the hot air generator 5 flows in the furnace 11 from the discharge port 22 toward the suction port 31 by the suction force 5, and returns to the hot air generator 5 from the suction port 52 through the suction pipe 3 and the intake pipe 7 outside the furnace. It is circulated in the normal route.
In addition, the fresh air intake port 53 provided with an open / close valve 54 that can adjust the intake amount is introduced into the intake port 52 portion of the hot air generating device 5 in order to take in fresh air mixed with the hot air circulated from the furnace 11. And the above-described exhaust port 36 provided on the rear end side of the suction pipe 3 cooperates to improve the efficiency of moisture drying.

FIG. 3 is a schematic view showing an example of a rotating means of a hot air drying furnace using the air supply device of the embodiment, wherein A is a side view and B is a front view. In addition, since it became the same as that of the said form, a hot air drying apparatus, air piping, etc. were abbreviate | omitted and described.
In the hot air drying furnace of the present embodiment, the main parts such as the discharge pipe 2 and the suction pipe 3 of the air supply device are configured in the same manner as in the above embodiment, and without rotating the discharge pipe 2 and the suction pipe 3, The axial direction of the furnace body 1 is configured such that only the furnace body 1 is rotatable, and the motor 82 that is a driving source for the rotation and the lower part of the furnace body 1 that is rotated by the motor 82 are sandwiched from both sides. In parallel with the rotating shaft body 85, the rotating shaft body 85 is mounted on the same axis as the outer periphery of the rotating shaft body 85, and is provided so as to contact the circumferential surface of the furnace body 1. And a roller 86 that rotates the furnace body 1, an L-shaped fixing plate 88 that fixes the rotating shaft 85 to the table 9, and a bearing 87 that rotatably attaches the rotating shaft 85 to the L-shaped fixing plate 88. did.
On the other hand, as the furnace body 1 that can be rotated by this rotating means, a circular shake preventing plate 14 that is formed in a cylindrical shape and protrudes from the cylinder so as to sandwich the both side ends of the roller 86 is provided on both side ends of the cylinder. When the furnace body 1 is placed on the roller 86, the roller 86 side end is slid and rotated during the rotation so that the positional deviation does not occur. Further, in this example, the connection means 4 between the air supply device and the furnace body 1 is not particularly provided, and the through hole that becomes the attachment portion 13 of the air supply device of the furnace body 1 is formed in the suction pipe 3 of the air supply device. Only the furnace body 1 is rotated without rotating the discharge pipe 2 and the suction pipe 3 by providing a slight gap 15 which is set to be slightly larger than the outer diameter of the pipe and is provided with a slight gap 15 which does not cause a serious problem in airtightness in the furnace. Possible configuration.

  The furnace body 1 having the above-described configuration is placed on a roller 86 (in this example, two are set on both the left and right sides, a total of four) at positions where both ends of the roller 86 are sandwiched between the shake prevention plates 14 of the furnace body 1. The rotation of the motor 82 is transmitted to the rotary shaft body 85 by the pulleys 81 and 83 and the belt 84 provided on the motor 82 and the rotary shaft body 85, and the roller 86 attached to the rotary shaft body 85 rotates. By doing so, the furnace body 1 placed on the roller 86 rotates in conjunction with it. Note that the motor 82 is set only on the one-side rotary shaft body 85a, and the other-side rotary shaft body 85b rotates in conjunction with the rotation of the furnace body 1 driven as described above. .

1. Furnace 11. Inside the furnace 12. Door 13. Mounting part 14. Anti-sway plate
2. Discharge pipe 21. Nose 22. Discharge port 23. Discharge hole 24. Air pipe connection part 25. Stirring fan 26. Tip cap 3. Inhalation pipe 31. Inlet 32. Filter 33. Filter cap 34. Rear end (occlusion)
35. Intake pipe connection part 36. Hot air outlet 37. Open / close valve Connecting means 41. Rotational connection means 42. Flange 5. Hot air generator 51. Air outlet 52. Inlet 53. Fresh air intake 54. Open / close valve
6). Air pipe 7. Intake pipe 81. Pulley (motor side)
82. Motor 83. Pulley (rotating shaft side)
84. Belt 85. Rotating shaft body 86. Roller 87. Rotary bearing 88. L-shaped fixing plate 9. table

Claims (9)

  In order to supply air to the container, a discharge pipe having a nose portion extending into the container, and a suction pipe for inhaling and discharging the air in the container located on the outer periphery substantially coaxial with the discharge pipe are provided. The discharge pipe and the suction pipe can be formed integrally, and the discharge port that is the tip of the discharge pipe is formed with the nose portion protruding from the suction port that is the tip of the suction pipe and separated from each other An air supply device.   The air supply device according to claim 1, wherein the suction port includes a filter.   The air supply device according to claim 1, further comprising a stirring fan that is rotated by blowing air at a tip portion of the discharge pipe.   The air supply device according to claim 1, wherein a discharge port of the discharge pipe is provided on a peripheral surface of a discharge pipe tip.   The air supply device according to any one of claims 1 to 4, further comprising an air generation device serving as a supply source of air connected to the rear end portion of the discharge tube via an air supply tube.   The air supply device according to claim 5, wherein a rear end portion of the suction pipe is connected to the air generation device via an air supply tube, and air circulates between the air generation device and the inside of the container.   The air supply device according to claim 6, wherein the air generation device includes a fresh air intake port, and a hot air discharge port in a path from the container to the air generation device.   The discharge pipe and the connection means for attaching the suction pipe to the container are configured, and the discharge pipe, the suction pipe and the connection means can be integrally formed, and the discharge port serving as the nose tip of the discharge pipe is 3. The method according to claim 1, further comprising: projecting from a suction port which is a tip of the suction pipe and being positioned in the vicinity of the wall surface of the container which is distal from the connection means to the container, while the suction port is positioned in the vicinity of the connection means. 7. Air supply device.   9. The air supply device according to claim 8, wherein the container is formed to be rotatable, and the discharge pipe, the suction pipe, and the connecting means located inside the container are located on a rotating shaft.

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