JP2002265050A - Horizontal piping plug forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promote the formation of a plug. SOLUTION: Bearings 63 and 64 having a seal member are arranged in an inside area of an outer tube 62, and both end parts of an inner tube 61 are rotatably supported by these bearings 63 and 64. The inner tube 61 is connected to a driving part 66 having a motor M via a mechanism part 65 having a gear, and is constituted so as to be rotated by the driving part 66. A projection part 68 is arranged inside the inner the tube 61. When scraping up an incompletely accumulating plug N, the plug P is suitably maintained and formed. A dotted line is a changing mode of the projection 68, and indicates the plate-like other shape. Shapes of wholly continuing in the radial direction, stopping by cutting in the middle, and being round on the tip can be cited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic transportation pipe used in a high-concentration pulverulent material transportation apparatus for transporting a group of pulverulent particles (hereinafter simply referred to as plugs) at a low speed and a high concentration. It is about. More specifically, the present invention relates to re-formation of a plug during transportation.

[0002]

2. Description of the Related Art Various inventions have been made with respect to the formation of plugs for high-concentration pneumatic transportation piping. For example, the pulverized material high-concentration air transport pipe disclosed in Japanese Patent Publication No. 1-38730 hangs below the horizontal part of the transport pipe at a position near the fluid tank at the horizontal part of the powder and has a sufficient length necessary for forming a stable plug. Forming a plug-forming U-shaped tube portion having a vertical portion of
Some can form and maintain plugs completely and reliably without the need for extra equipment. Actual opening 5
The plug-reforming apparatus for granular material of No. 5-11933 is a plug-type pneumatic transport device for granular material, which is provided in the middle of a transport pipe.
By providing a Z-shaped bent tube having two corners, the plug can be prevented from collapsing or reformed without any external operation without power.

[0003]

However, those described in the prior art have the following problems. However, since the transport direction of the plug must be changed on the way, extra space is required,
There is a problem that the practicality of plug formation is affected. Also,
Both of the inventions relate to the formation and re-formation of a plug in a horizontal tube, but are not yet sufficient. Moreover, there is no idea to solve the effect of gravity on the plug transported in the vertical tube. In the vertical pipe of the pneumatic transportation pipe,
Since the plug may be returned downward by the action of gravity, the plug may overlap with the next plug and may be choked. Further, conventionally, construction is carried out with ordinary piping, for example, by storing powder and granules in a pressure tank, supplying high-pressure air into the pressure tank, and sealing the inside of the tank. Opening the valve and supplying the granular material, closing the valve and sending out the granular material are repeated, which is essentially batch transport. Conventionally, the performance of the rotary valve may not be very good,
When the pressure in the transport pipe increases, air may be released if the transport source is a rotary valve. High-concentration transportation of powdered materials has a small air volume despite air pressure,
When the plug collapses, the pressure is released, and the air volume has no power to move the granular material. In that case, a large amount of air must be sent in the end, and in a sense, the powder and granules must be sent in an atmosphere similar to low-concentration transport. That is, at the final stage, the powder is not supplied, the mixing ratio is gradually reduced, and the powder is deposited, making it difficult to form a plug. In other words, when the granular material in the pressure tank runs out, the plug passes through the space above the plug on which the pressure is accumulated, and the plug remains. Although high-concentration transport is carried out from the beginning to 50% to 90% of the time, the last 10% of the powder must be transported in the transport pipe at a very high speed to clean the pipe. Therefore, a large amount of air is blown at the end. This is called a blow, but it results in low concentration and high speed. In this case, when the granular material is a granular material or the like, it is damaged and the commercial value is reduced, and extra equipment and energy for the blow are required. The present invention has been conceived in view of such various problems of the conventional technology that is in any case lacking in practicality, and an object of the present invention is to provide one that can solve the above-described problems. It is.

[0004]

That is, the present invention has been made in view of the above points, and an apparatus according to the first aspect of the present invention is a method of forming a plug-shaped powder or granular material using compressed air. Applied to a granular material high concentration pneumatic transportation device that transports at a low concentration at a low concentration continuously and alternately with a layer, provided with a horizontal pipe, a rotation drive unit that rotates the horizontal pipe, forming the powder and particle group, A horizontal pipe plug forming apparatus characterized by maintaining.

[0005] According to the apparatus of the first aspect, the plug is preferably formed in the powder and granular material transport pipe, and the above problem can be suitably solved. Even if the plug collapses during transportation, the plug can be suitably reformed by rotating the granular material, the plug and the pressurized air layer are alternately and appropriately formed, and high-concentration air transportation of the granular material can be achieved. It can be suitably executed. Further, the granular material transport pipe may have a single structure or a double structure.

The horizontal pipe according to claim 1, wherein the horizontal pipe has a double pipe structure, the outer pipe is fixed, and the inner pipe is rotatably supported inside the outer pipe. Preferably, it is a plug forming device. According to the device of the second aspect, in addition to solving the above-mentioned problems, the outer tube protects the inner tube, and thus has effects such as dew condensation prevention, noise prevention, and easy cleaning.

[0007] The apparatus according to claim 3 is preferably the horizontal pipe plug forming apparatus according to claim 1, wherein the horizontal pipe has a single-layer structure, and the rotary drive section is disposed outside the pipe. According to the device of the third aspect, in addition to solving the problem, it is possible to visually monitor the rotation state to monitor the rotation.

According to a fourth aspect of the present invention, in the apparatus, a projection is provided inside the horizontal pipe.
Any horizontal piping plug forming device. According to the device of the fourth aspect, in addition to solving the above-mentioned problem, since the protruding portion lifts the granular material, the efficiency of plug formation is increased.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A high concentration pneumatic transportation piping system 1 will be described below with reference to FIGS. As shown in FIG. 1, a pulverized material high concentration pneumatic transportation piping system 1
Is a piping system having a double structure including a straight pipe portion 2, a constricted portion 3 (or a bulging portion 4), a bend portion 5, a horizontal pipe plug forming device 6, and an auxiliary air supply device 8, and a plug forming device 9 This transports the plug P (see FIGS. 5 and 6). The pipe has a double pipe structure and is composed of an inner pipe and an outer pipe. The plug P is transported through the inner passage 10 and the outer passage 11
Are filled with auxiliary high pressure air. The pressure in the outer passage 11 is set higher than the pressure in the inner passage 10.
In the embodiment, the material of each part is SUS and duralumin, but other appropriate materials can be used. An appropriate shape such as a square shape or a round shape can also be adopted as the shape. Hereinafter, each part will be described in detail.

(Structure of the straight pipe part 2, the constriction part 3, and the bulging part 4) The straight pipe part 2 is a normal cylindrical pipe, and as shown in FIG. Passage 10, outer passage 1
It is a double structure composed of 1. There are two types, a vertical tube 25 and a horizontal tube 26. The constricted portion 3 hermetically connects the straight pipe portions 2 to each other, the straight pipe portion 2 to the bend portion 5, the horizontal pipes 26 to each other, and the bend portion 5 to the horizontal pipe plug forming device 6 in an airtight manner. Is what you do. This constriction 3
Has a double structure composed of an inner tube 31 and an outer tube 32, in which the plug P is transported through the inner passage 10 and the outer passage 11
Is filled with high-pressure air. In addition, the constricted part 3 has an upper part 3
3, a middle part 34, and a lower part 35, which are formed continuously. The lower part 35 gradually decreases in cross section upward, and has a minimum sectional area in the middle part 34. Further, the upper part 33 is characterized in that the sectional area gradually increases upward. As a result, the wind speed increases at the portion where the cross-sectional area becomes narrow, and the function of the injection for forming the plug is achieved. The constricted portion 3 is formed integrally with a ferrule (or flange or the like) 36 at the upper end and a ferrule 37 at the lower end to form an air communication passage (hole).
38 are provided. FIG. 2C shows the inner tube 31 as a form, which is formed in a block shape.
As shown in FIG. 2D, the inner tube 31 and the outer tube 32 may be integrally formed in a block shape. For example,
The inner passage 10 and the outer passage 11 penetrate from a block to form a double pipe structure. As the shape,
2 and 3, a funnel shape, a trumpet shape, a tapered shape, a gourd shape shown in FIG. 4A, and a web shape shown in FIG. 4B. The constricted portion 3 (bulging portion 4) is provided separately from the straight pipe portion 2, the bend portion 5, and the horizontal pipe plug forming device 6. However, it is also possible to integrally form this as an accessory. For example, if the constricted portion 3 is present as shown in FIG. As shown in FIG. 5, the bulging portion 4 includes an upper portion 43, an intermediate portion 44, and a lower portion 45.
These are formed continuously, and the lower part 45 gradually increases in cross-sectional area upward, reaches the maximum cross-sectional area in the middle part 44, and the upper part 43 gradually increases in cross-sectional area upward. It is characterized by becoming narrow.
By providing a portion having a large cross-sectional area, the granular material stalls and accumulates. In high-concentration pneumatic transportation, plugs and air layers are alternately transported in a vertical pipe section, and whether or not this plug can be formed and maintained may determine whether or not this high-concentration transportation can be performed properly. When the balance of the mixing ratio is lost, the plugs are broken or overlapped. That is, the horizontal pipe 26
In, the plug collapses and a gap is easily created at the top,
The plug P can be formed by the constricted portion 3 or the bulged portion 4.
In the case of the vertical tube 25, when the specific gravity of the granular material is heavy, the plug may fall due to gravity. However, by receiving the return of the plug P downward, the plug can be prevented from overlapping with the subsequent plug. . Furthermore, of the straight pipe part 2,
In the horizontal pipe 26, the plug P is greatly affected by gravity,
Depending on the conditions, the inner tube 21 may be designed as shown in FIG. 6 depending on the condition, and the bulging portion 4 (or the constricted portion 3) is continuously formed at an appropriate interval in the inner tube 21. A plurality of bulging portions 4 (or narrowing portions 3) may be continuously connected to the vertical
It is needless to say that it can be provided also in the case. Further FIG.
, The upper part 33 of the constricted part 3 or the lower part 45 of the bulging part 4
A gas-permeable filter 37 or 47 made of metal or the like is formed to supply air from the outer passage 11 to the inner passage 10, thereby assisting in transporting the plug P upward and contributing to the formation of the plug P. Can also.

(Structure of the bend portion 5) The place where the granular material is most likely to stop is a bent portion in the pipe, where the plug is likely to overlap. In particular, at the rising part of the pipe, the plug drops due to gravity and overlaps with the subsequent plug. Therefore, in order to prevent this, as shown in FIG. 8, the bend portion 5 of the present embodiment includes the inner pipe 51, the outer pipe 52, and the inner passage 1 as shown in FIG.
A ferrule (or flange or the like) 53 is formed at the upper end and a ferrule 54 is integrally formed at the lower end, and an air communication passage (hole) 55 is provided through the outer passage 11.
A gas-permeable filter 57 made of, for example, metal (for example, sintered metal) is provided on the bottom surface of the bend. The position is preferably the bottom portion, but may be an appropriate position. Since the inside of the outer passage 11 is filled with the high-pressure auxiliary air, the high-pressure auxiliary air is supplied from the outer passage 11 to the inner passage 10 through the filter 57 to measure the fluidization of the plug or to reduce the pressure inside the inner pipe 51. Is to be prevented. In addition, the filter 57 is not limited to the bend part 5, but the straight pipe part 2,
Needless to say, it can be provided in the constricted portion 3, the bulged portion 4, and the horizontal pipe plug forming device 6 described below.

(Structure of Horizontal Pipe Plug Forming Apparatus 6) Generally, the horizontal pipe 26 is more difficult to maintain and form the plug shape than the vertical pipe 25. As shown by the incompletely deposited plug N in FIG. 9, there is a possibility that a gap may be formed in the upper portion and the transport air may escape. With the air amount of the high-concentration low-speed transport, the energy for floating the imperfectly deposited plug N and horizontal transport is insufficient. However, it is possible that the subsequent powder or particles may move again on the pile of the imperfectly deposited plug N. In any case, in order to solve such a problem, the horizontal pipe 26 is configured to rotate, and the incompletely deposited plug N deposited in the lower region is rotated to facilitate the formation of the plug P. Therefore, in the horizontal pipe plug forming device 6 of the present embodiment, as shown in FIG. 9, the inner pipe 61 has a rotating structure that rotates in the axial direction, and the outer pipe 62 has a fixed structure. Further, bearings 63 and 64 provided with a seal member are installed in the inner region of the outer tube 62, and both ends of the inner tube 61 are rotatably supported by the bearings 63 and 64. The inner tube 61 is connected to a drive unit 66 having a motor M and the like via a mechanism unit 65 having gears, and is configured to be rotated by the drive unit 66. The drive unit 66 here may have independence, and the pipe may be protruded and rotated. As shown in FIG. 10A, the mechanism 65 includes a pulley 6
5a and a belt 65b, or gears 65c and 65d as shown in FIG. Horizontal piping plug forming device 6
It is preferable that the powder is continuously rotated at a low rotation speed as long as the powder flows at a slow speed. However, the drive section 66 and the pipe need not be integrated. Here, the drive unit 66 is provided in a double-tube structure. However, as shown in FIG. 11A, the drive unit 66 may have a single structure, and the base of the motor M may be located somewhere else. For example, a bracket may be provided on the ceiling and a motor M may be attached to the bracket. The inside of the inner tube 61 may have no protrusion, or a protrusion 68 may be provided inside the inner tube 61 to scrape up the incompletely deposited plug N as shown in FIG. Then, the maintenance formation of the plug P is promoted. The dotted line is a modified form of the projection 68 and shows another shape of the plate. Examples include those that are all continuous in the radial direction, those that stop in the middle, and those that have rounded tips.

(Configuration of Auxiliary Air Supply Device 8) As shown in FIG. 13, the auxiliary air supply device 8 is provided with a manual valve 81 capable of adjusting an appropriate flow rate by turning a screw. The auxiliary high-pressure air flows into the inner passage 10 as shown by the arrow. This is because the air pressure in the outer passage 11 is set to be higher than the air pressure in the inner passage 10. The auxiliary air (high-pressure air) is supplied to the outer passage 11 mainly from a compressor or the like via a receiver tank, an electromagnetic valve or the like (not shown). The auxiliary air is appropriately adjusted by a temperature controller and a humidity controller (not shown). The temperature control device and the humidity control device can also adjust the transport air passing through the inner passage. In any case, in the case of cooling, air is supplied via a chiller. To prevent moisture absorption, dry air is supplied via a dryer. In the case of dehumidification, it becomes dry, and air is heated and supplied via a heater.

(Example of connection structure of piping) The connection structure of the outer tube 62 may be an appropriate structure. As shown in FIG.
The connection device 101 for stopping 00 may be installed at an angle different from the left and right by 90 degrees, and in any case, the connection may be made airtight. Further, as shown in FIG. 14, as an example of a pipe connection structure, a ferrule 102 is formed at the end of the pipe by welding or the like, and the ferrule 102 is fastened with a clamp 103 to be detachable. Thereby, the clamp 103 is detached and disassembled, and the inside can be inspected. The connection structure is formed at both ends of the straight pipe part 2, the constricted part 3, the bulging part 4, and the bend part 5, so that air does not escape.

(Structure of Plug Forming Apparatus 9) The structure of the plug forming apparatus 9 can be variously exemplified.
As shown in (a) to (c), there are three types.
Application is also possible with the structure of a conventional plug forming device. (D) is a right side view of (c). The plug forming device 9 of FIG. 15A has a rotary valve 90 that is rotated by an inverter motor or the like installed on the upper part of a hopper 91. The upper part of the hopper 91 has a double pipe structure. The granular material discharged downward from the valve 90 and the transport air supplied from the inlet 93 through a blower or a compressor (not shown) are transported downstream from the bend pipe 95 in the same direction (gravity direction). is there. In short, along with gravity, powder and transport air fall,
The hopper 9 is smoothly supplied to the transport pipe.
1 eliminates the possibility of causing turbulence inside, prevents energy loss, and realizes smooth transportation. Further, for example, it is possible to eliminate the possibility of damage such as granules (eg, rice grains, coffee beans, etc.) colliding with a wall surface. The rotary valve 90 preferably has an airlock structure. The reason why the plug P can be formed is that the plug P is intermittently dropped for each pocket by the rotary valve 90. Although the plug P is formed to some extent, the plug P may become uniform during transportation in the piping. However, a complete plug can be maintained and formed by the piping system 1 described above. 15 (b), (c),
(D) is a flow-through type rotary valve, which is configured so that air from a blower flows through the inside of the rotary valve. If the particles reach the floating speed, they are carried. Mainly a rotary valve 90 is suitable,
A flap valve, a gate valve or the like may be used. However, because of the pressure, an airlock is necessary.

(Explanation of Double Structure) In the piping system 1 of the present embodiment, it is significant that the piping has a double structure as described above. From the outer passage 11 of the double structure to the inner passage 10
The auxiliary high-pressure air is passed through the valve 81, the filter 57, and the like to assist in reducing the internal pressure of the inner pipe. The advantage of the auxiliary air is that if too much pressure is applied to the pipe, high pressure cannot be applied to the pipe since there is a possibility that air will leak even though the accuracy of the rotary valve of the plug forming device 9 is increased. There is a risk. Then, the transport pressure in the pipe decreases on the way. Therefore, it is necessary to supplementally supply high-pressure air to the pipe at appropriate intervals or at predetermined intervals. Further, the high-pressure air flowing through the inner tube has a property of being too dry to some extent without any operation, and the moisture of the powder or granules is absorbed, so that it is necessary to humidify the air. For example, rice is easily broken when it is too dry. Therefore, it is necessary to humidify to a certain extent, and a humidifier S (see FIG. 1) is provided at an appropriate place, and humidified auxiliary air is supplied to the gap of the double structure, so that a conveyed material, for example, a grain (rice, etc.) Prevents damage. In addition, when dew is formed on the inner wall of the inner tube, there is a possibility that the powdery granules absorb the dewed water and cause mold. Therefore, inconvenience can be prevented by the heat retaining effect caused by the double structure. Further, as shown in FIG. 3, by connecting the electric wiring for the sensor, the power supply line of the valve 81, or the ground wiring 211 to the outer passage 11 having the double structure, it can be used as a space for storing the wiring. It is. In particular, when the powder or the particles to be transported is toner of a copying machine, static electricity may be generated in the inner tube 31, and the ground wire 211 electrically connected to the inner tube 31 is required. In addition, due to the double structure, noise generated during pneumatic transportation of the granular material can be reduced.

Next, the operation and operation of the high-concentration pneumatic transportation pipe 1 of the present embodiment will be described with reference to FIGS. Plug P formed by plug forming device 9
Is transported through the constricted part 3, the bend part 5, and the straight pipe part 2, and the transport direction is changed from the horizontal direction to the vertical direction. And
At the bend unit 5, the air is transported again by being changed in the horizontal direction. In the horizontal pipe plug forming device 6, the plug P is suitably maintained and formed by the rotation of the inner pipe 61. The constricted portion 3 and / or the bulged portion 4 are provided in the middle of the vertical pipe and / or the horizontal pipe to form a stable plug P. While the plug P passes through the horizontal pipe 26,
A gap is formed in the upper part of the plug, and the problem that air escapes can be solved. Further, when the plug P rises in the vertical pipe 25, the powder drops when the specific gravity of the granular material is heavy, so that the air escapes in the traveling direction, gradually accumulates and overlaps with the subsequent plug to solve the problem of choking. it can. The constricted portion 3 or the bulged portion 4 forms a normal plug P, and enables a suitable repetition of the plug P and the air layer. Very simple structure, and extremely effective. The performance of the rotary valve has also been improved, and it is possible to feed continuously by a rotary valve instead of batch. The advantage of a rotary valve is that the powder can be transported continuously. further,
By the operation of the auxiliary air supply device 8, auxiliary high-pressure air is supplied from the outer passage 11 to the inner passage 10. Bend part 5
In this case, auxiliary high-pressure air is supplied via a filter 57.

(Effects of the Embodiment) According to the high-concentration pneumatic transportation piping system 1 of the present embodiment described above, the following effects are obtained. 1． Between the straight pipe portions 2 or between the straight pipe portion 2 and the bend portion 5,
By appropriately arranging the constriction portion 3 or the bulging portion 4 and the plug forming device 6 in the horizontal tube portion, a regular plug P is appropriately formed, so that stable high-concentration low-speed transport is possible, and No special blowing is required. 2． It is particularly suitable for preventing crushing of granules (rice, coffee beans, soybeans, etc.) during pneumatic transportation. 3． An energy-saving device capable of transporting with a small amount of air by maintaining a proper pressure in the pipe by regularly forming the plug P by the constricted portion 3 or the bulging portion 4 during the transportation in the pneumatic transportation pipe. Can be provided. Four. The constricted portion 3 or the swelled portion 4 functions to prevent the plug P from dropping in the vertical tube 25 even in the case of a powdery substance having a high specific gravity, thereby preventing clogging (choke) in the tube. Five. Since the granular material is transported in the form of a plug in the pipe, there is no adhesion of fine powder on the inner surface of the pipe, contamination can be eliminated, and hygiene can be improved. 6． By filling the outer passage 11 of the double structure with high-pressure air and supplying it to the inner pipe for transporting the granular material via a safety valve, a filter of metal or the like, more stable transport is possible. It is particularly effective in the bend section. 7． By passing humidified and heated air through the outer passage 11 having a double structure and supplying the air to the inner pipe for transporting the granular material through a safety valve or a metal filter, it is possible to prevent damage to the conveyed material due to humidification and to heat the material. Can dehumidify the conveyed object. 8． The heat retention effect of the double structure prevents condensation in the inner tube. 9． The outer passage of the double structure can be used as a sensor or a wiring duct for grounding. Ten. 11. Reduce noise by double structure. The assembly type is easy to construct, the appearance is smart, and the device can be made a black box. 12． It is hard to get dirty inside and outside the pipe, and even if it gets dirty, it is easy to clean and excellent in hygiene. 13. A novel design can be realized.

It should be noted that the present invention is not limited to the above-described embodiment, but may be modified without departing from the technical idea of the present invention.
Such modifications and equivalents are also included in the technical scope of the present invention.

[Brief description of the drawings]

FIG. 1 is an internal structural diagram of a pulverized material high-concentration air transport piping system and a plug forming device according to an embodiment of the present invention.

FIG. 2 (a) is a plan view of a constricted portion of a pulverized material high-concentration pneumatic transportation piping system, FIG.
(C) is a perspective view of the constricted portion, and (d) is a front view of a modified form of the constricted portion.

FIG. 3A is a longitudinal sectional view of a modified form of the constricted portion,
(B) is a cross-sectional view.

FIG. 4A is a longitudinal sectional view of a modified form of the constricted portion,
(B) is the front cross section of the constricted part which is another modification of the constricted part.

FIG. 5 (a) is a longitudinal sectional view showing the operation of the bulging portion,
(B) is a longitudinal sectional view showing the operation of the bulging portion.

FIG. 6 is a longitudinal sectional view of a pipe in which a plurality of bulges are provided in a horizontal pipe.

7A is a longitudinal sectional view of a vertical pipe provided with a filter in a constricted portion, and FIG. 7B is a longitudinal sectional view of a vertical pipe provided with a filter in a bulging portion.

FIG. 8 is a longitudinal sectional view of a bend portion.

FIG. 9 is an internal structural view showing a horizontal pipe plug forming device of the powdery and granular high-concentration air transport pipe system.

10A is a side view showing a pulley / belt mechanism of the horizontal pipe plug forming device, and FIG. 10B is a side view showing a gear mechanism.

11A is a structural view of another horizontal pipe plug forming apparatus, and FIG. 11B is a connection structural view of pipes.

FIG. 12 is a longitudinal sectional view in a direction orthogonal to an axial direction of a horizontal pipe of the horizontal pipe plug forming device.

FIG. 13 is a detailed sectional view of a pipe connection structure.

FIG. 14 is a detailed sectional view of the auxiliary air supply device.

FIGS. 15A to 15C are explanatory views of an example of a plug forming apparatus, and FIG. 15D is a right sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... High-concentration pneumatic transportation piping system 2 ... Straight pipe part 3 ... Constriction part 5 ... Bend part 5 ... Horizontal piping plug forming device 8 ... Auxiliary air supply device 9. ..Plug forming devices P ・ ・ ・ Plugs

Claims (4)

[Claims] The present invention is applied to a high-concentration pulverized material transporting apparatus which transports a group of plug-shaped particles at a low speed and a high concentration alternately and continuously with a pressurized air layer. And a rotation drive section for rotating the plug, and forming and maintaining the powder and granular material group. 2. The horizontal pipe plug forming apparatus according to claim 1, wherein said horizontal pipe has a double pipe structure, an outer pipe is fixed, and an inner pipe is rotatably supported inside the outer pipe. 3. The horizontal pipe plug forming apparatus according to claim 1, wherein said horizontal pipe has a single-layer structure, and said rotary drive section is disposed outside said pipe. 4. A horizontal pipe plug forming apparatus according to claim 1, wherein a projection is provided inside said horizontal pipe.