JPH10220362A - Air pulse pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pump which can surely and smoothly feed material composed of fluid, slurry, powder, conveying material such as ready-mixed concrete through a transferring pump. SOLUTION: An air pulse pump feeds material charged from a charging port 16 into a casing 10 through a screw blade 30 spirally wound around a shaft 20 rotated inside the casing 10 toward a discharge port 14 formed on a leading end of the casing 10. Compressed air is intermittently supplied to a rear end of the shaft 20 by air supply means 50. The compressed air is repeatedly and intermittently discharged into the discharge port 14 of the casing from the leading end of the cylindrical shaft 20. The material is conveyed to a target position inside a conveying pipe 100 connected to the discharge port 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump for transferring ready-mixed concrete (mixed concrete) from a mixer truck to a casting site.

[0002]

2. Description of the Related Art Conventionally, this type of pump includes a piston cylinder type, a squeeze type using a pumping tube, and a diaphragm type using hydraulic pressure.

[0003]

However, piston-cylinder type pumps suffer from severe wear of the pistons and cylinders during use, and have a problem in durability. Further, during use, troubles such as the aggregate in the ready-mixed concrete getting into between the piston and the cylinder occurred.

In addition, a squeeze-type pump using a pumping tube may be deformed due to fatigue of the tube during use, resulting in a decrease in the transporting ability and a risk that the tube may be damaged by aggregates in the ready-mixed concrete. There was nature.

[0005] Further, a diaphragm pump using water pressure cannot be operated immediately in accordance with the work of placing concrete, because of the use of water pressure. Could not be transported to the casting site. In addition, the diaphragm was greatly worn during use, and the diaphragm had to be replaced frequently.

[0006] Similar to the above, a fluid such as miso, a mud, a powder, a granule or a mixture thereof other than the above-mentioned ready-mixed concrete is transferred from a predetermined location to another location using the above-described pump. I was able to say that

The present invention can solve such a problem.
It is an object of the present invention to provide a new type of air pulse pump using compressed air instead of the conventional pump described above.

[0008]

In order to achieve the above object, an air pulse pump according to the present invention is formed so that its inner diameter is gradually reduced as it goes forward, and is supported rotatably in the axial direction in a cylindrical casing. Around the cylindrical shaft, screw blades are raised and spirally wound, and a discharge port for a conveyed material is provided at the tip of the casing, and an input port for charging the conveyed material into the casing is provided on the peripheral wall of the casing. An air supply means for intermittently supplying compressed air into the rear end of the cylindrical shaft is provided.

When using this air pulse pump, the rear end of a transport pipe for transporting a transported object is connected to the discharge port of the casing. And the transport pipe,
Lay it along the transport path of the transported goods.

Next, while rotating the shaft in a predetermined direction, the casing is made of a fluid such as ready-mixed concrete, a mud such as miso, a powdery substance, a granular substance, or a mixture thereof through an inlet of the peripheral wall of the casing. By feeding the conveyed product, the conveyed product can be continuously pushed in the direction of the conveyed product discharge port at the tip of the casing by the surface of the screw blade wound around the shaft rotating in the casing. Then, the conveyed material can be conveyed in the direction of the discharge port of the conveyed material at the tip of the casing while spirally rotating between the screw blades around the shaft in the casing.

[0011] Then, the conveyed material can be continuously pushed out from the discharge port of the conveyed material at the tip of the casing into the conveying pipe connected to the discharge port. Then, the transported object can be continuously pushed in the transport pipe to the forward side, and the transported object can be transported in the transport pipe to the forward side along the transport path on which the transport pipe is laid.

At this time, the compressed air can be intermittently supplied into the rear end of the shaft by the air supply means. Then, the compressed air can be intermittently discharged from the tip of the shaft through the inside of the cylindrical shaft into the discharge port of the conveyed material at the tip of the casing in which the tip of the shaft is disposed. Then, by the compressed air intermittently discharged into the discharge port, as described above, the conveyed material pushed out from the discharge port of the conveyed material at the front end of the casing into the conveying pipe is moved to the front of the conveying pipe. Pressing repeatedly can be surely repeated.

That is, it is possible to repeatedly and intermittently apply the impact force toward the front in the transport pipe to the transported article transported in the transport pipe. Then, the conveyed object is moved in the conveying pipe without being caught in the middle of the conveying pipe against the frictional force and the resistance force acting between the conveyed object and the inner peripheral wall of the conveying pipe on which the conveyed object is conveyed. It is possible to intermittently forcibly move toward the other side by a predetermined distance.

Then, the conveyed material is not intermittently stagnated in the middle of the conveying pipe, and the pressing force applied to the conveyed material from the screw blade surface around the rotating shaft and the conveyed material is intermittently discharged from the tip of the shaft. With the pressing force repeatedly applied to the conveyed article by the compressed air, the conveyed pipe can be smoothly and promptly and reliably conveyed to the other end thereof.

In the air pulse pump of the present invention,
A surge tank for storing compressed air, a communication passage communicating between the surge tank and the rear end of the shaft so as not to hinder rotation of the shaft, and an on-off valve for repeatedly opening and closing the communication passage It is preferable to consist of

In this air pulse pump, the compressed air can be sufficiently accumulated in the surge tank with a margin so that the supply amount of the compressed air does not become insufficient. Then, the inside of the communication passage is repeatedly opened and closed by the on-off valve, and the compressed air stored in the surge tank can be continuously and intermittently supplied to the rear end of the shaft through the inside of the communication passage. Then, the compressed air can be intermittently discharged into the discharge port of the casing through the cylindrical shaft. And, by the compressed air,
It is possible to repeatedly and intermittently push the conveyed material extruded from the discharge port of the casing into the conveying pipe toward the other end of the conveying pipe.

In this air pulse pump, an on-off valve for repeatedly opening and closing the inside of the communication passage is provided with a two-way valve,
It is preferable that the two-way valve comprises an air motor with a speed reducer for rotating a rotation shaft of the valve body.

In this air pulse pump, the valve body of the two-way valve is continuously rotated in a predetermined direction by an air motor with a speed reducer, so that the two-way valve repeatedly opens and closes the communication passage. Can be. Then, the compressed air stored in the surge tank can be intermittently supplied to the rear end of the shaft through the communication path.

In this air pulse pump, the communication passage is a communication pipe arranged at the rear end of the shaft in series with the shaft, and the inside of the communication pipe is arranged so as not to hinder the rotation of the shaft. A communication pipe that communicates with the inside of the end, and a pipe that communicates with the inside of the surge tank and the rear end of the shaft through the communication pipe, and is provided with an on-off valve that repeatedly opens and closes the inside of the communication passage. Is preferred.

In this air pulse pump, the open / close valve repeatedly opens and closes the inside of the pipe, so that the compressed air stored in the surge tank passes through the inside of the pipe and the inside of the communication pipe and communicates with the tip of the communication pipe. Supply can be continued intermittently in the rear end of the rotating shaft. In this case, it is possible to prevent the rotation of the shaft from being hindered by a communication pipe arranged in series with the shaft at the rear end of the shaft.

Also, in this air pulse pump, a sub-communication pipe is provided at the rear end of the communication pipe so as to extend in series with the inside of the communication pipe so as to open and close the rear end opening of the sub-communication pipe. A door is provided, and at the connection point between the pipe and the communication pipe, the communication pipe and the pipe are communicated with each other, and the communication pipe and the sub-communication pipe are cut off, or the communication pipe and the sub-communication pipe are connected. And a switching valve for shutting off between the inside of the communication pipe and the inside of the pipe, and inserted into the sub communication pipe from the rear end opening of the sub communication pipe to communicate with the inside of the sub communication pipe and the communication therewith. Feeding means for feeding compressed air into the rear end opening of the sub-communication pipe closed by the door, provided with a cleaning bullet that is fed into the discharge port of the casing through the communication pipe and the shaft communicating therewith. Be prepared It is to be preferred to the structure.

In this air pulse pump, the switching valve is operated to connect the inside of the communication pipe and the inside of the sub communication pipe, and to cut off the communication between the inside of the communication pipe and the inside of the pipe. Then, the intermittent supply of the compressed air stored in the surge tank to the rear end of the shaft through the pipe and the communication pipe can be stopped. Next, a door for opening and closing the rear end opening of the sub communication pipe can be opened, and the cleaning bullet can be inserted into the sub communication pipe. Next, the rear end opening of the sub communication pipe is closed by the door, and compressed air can be fed into the rear end opening of the sub communication pipe inside the door by the feeding means. Then, by the pressing force of the compressed air, the cleaning bullets inserted into the sub-communication tube can be sent into the discharge port of the casing through the sub-communication tube, the communication tube communicating therewith, and the shaft communicating therewith. . Furthermore, the cleaning bullet can be moved to the front in the transport pipe connected to the discharge port of the casing by the pressing force of the compressed air. Then, by the cleaning bullet, the residue of the conveyed material adhered and deposited in the sub communication pipe, the communication pipe, the shaft and the transport pipe connected to the discharge port of the casing is removed in the sub communication pipe, the communication pipe, and the shaft. In addition, it can be extruded from the inside of the transport pipe to the outside of the distal end of the transport pipe and removed. Then, the cleaning operation of the inside of the sub communication pipe, the inside of the communication pipe, the inside of the shaft, and the inside of the transport pipe can be easily and quickly performed.

In this air pulse pump, the cleaning bullet is preferably made of a sponge material.

In this air pulse pump, since the cleaning bullet made of a sponge material is rich in elasticity and flexibility, the cleaning bullet made of the sponge material has irregularities or bends. In the sub-communication pipe,
Without being caught in the shaft and the transport pipe, it can be smoothly moved along the sub-communication pipe, the communication pipe, the shaft and the transport pipe with little resistance. Then, the cleaning work in the sub communication pipe, the communication pipe, the shaft, and the transport pipe can be accurately performed.

Further, in this air pulse pump, it is preferable that an inflow port through which fine substances in a conveyed material flow into the shaft is provided in the peripheral wall at the tip end of the shaft.

In this air pulse pump, most of the fine substances in the conveyed material are connected to the discharge port of the casing through the inflow port provided on the peripheral wall of the shaft and the distal end of the cylindrical shaft. It can be sent out into the transport pipe. Then, instead, the conveyed object including other agglomerates is passed through the narrow gap between the periphery of the shaft and the inner surface of the casing without being disturbed by fine objects in the conveyed object, and is discharged to the discharge port of the casing. It can be smoothly fed into the connected transport pipe with little resistance.

In this air pulse pump, it is preferable that a crushing blade for crushing the lumps in the conveyed material is provided at the tip of the screw blade wound around the shaft.

In this air pulse pump, the agglomerates in the conveyed material sent near the discharge port in the casing at the end of the shaft are transferred to the tip of the screw blade wound around the rotating shaft. Fine grinding can be performed by the provided grinding blade. Then, the conveyed material sent near the discharge port in the casing can be uniformly homogenized into a powdery or small particle form. And the conveyed material homogenized in the form of powder or small particles can be smoothly conveyed to the tip of the conveying pipe connected to the discharge port of the casing with little resistance.

Further, it is preferable that the air pulse pump has a structure in which an air motor with a speed reducer for rotating a shaft is provided.

In this air pulse pump, when an excessive load is applied from a conveyed material to the screw blade wound around the shaft, the air motor can be brought into an unrotatable state. Then, it is possible to prevent the screw blades around the shaft from being deformed or damaged due to excessive pressing force applied from the conveyed material, while the shaft is forcibly rotated by the air motor.

[0031]

Next, embodiments of the present invention will be described with reference to the drawings. 1 to 11 show a preferred embodiment of an air pulse pump according to the present invention. FIG. 1 is a plan view, FIG. 2 is a front view around the casing, and FIG. 3 is a front sectional view around the casing. 4 is a side view of the casing, FIG. 5 is an AA sectional view of FIG. 3, FIG. 6 is a front sectional view of the casing, the communicating pipe and the sub communicating pipe, and FIG. 7 is an enlarged front view of the vicinity of the screw blade. FIG. 8 shows B- of FIG.
B sectional view, FIG. 9 is an enlarged front sectional view of the on-off valve, FIG.
And FIG. 11 are CC sectional views showing the operation state of the on-off valve of FIG. Hereinafter, this air pulse pump will be described.

In the figure, reference numeral 10 denotes a funnel-shaped cylindrical casing whose inner diameter gradually decreases as the inner part moves forward.

In the axial direction of the casing 10, a hollow cylindrical shaft 20 having a hollow inside is supported rotatably.

Around the shaft 20, strip-shaped screw blades 30 are erected at a predetermined pitch and continuously wound spirally a plurality of times. The screw blade 30 is
As shown in FIG. 7, the outer diameter is gradually reduced from the rear end of the shaft 20 to the front end thereof in accordance with the inner diameter of the casing 10. The screw blade 30 can be rotated inside the casing 10 together with the shaft 20 while the outer edge of the screw blade 30 is in sliding contact with the inner peripheral surface of the casing 10.

An air motor 40 with a speed reducer is attached to the rear end of the casing 10 via a flange 12. The rear end of the shaft 20 is integrally inserted into a through hole 42 at the center of the output shaft of the speed reducer of the air motor 40 via a key and a key groove 44. And
The rear end of the shaft 20 is supported by a speed reducer of the air motor 40. At the same time, a portion from the middle to the tip of the shaft 20 is supported on the inner peripheral surface of the casing 10 via a screw blade 30 wound around the shaft 20. The shaft 20 is supported so as to be rotatable inside the casing 10.

At the tip of the casing 10, a small cylindrical discharge port 14 is formed. And the discharge port 14
Can be connected to the transport pipe 100.

On the peripheral wall of the casing 10, a casing 10
A cylindrical input port 16 for inputting a conveyed object is provided therein. Then, through the input port 16, the casing 10
It is designed to be able to load conveyed goods inside.

Reference numeral 50 denotes a cylindrical shaft 20 for supplying compressed air.
Means for supplying air intermittently into the rear end.

As shown in FIG. 1, the air supply means 50 connects the surge tank 52 for storing compressed air and the inside of the surge tank 52 and the rear end of the shaft 20 so as not to hinder the rotation of the shaft 20. And the communication path 54 that communicates
And an on-off valve 56 that repeatedly opens and closes the communication passage 54. The open / close valve 56 repeatedly opens and closes the communication passage 54, so that the compressed air stored in the surge tank 52 is intermittently and stably supplied to the rear end of the rotating shaft 20 through the communication passage 54. I can do it.

The on-off valve 56 includes a two-way valve 562 as shown in FIGS. 9 to 11, and a valve body 56 of the two-way valve 562.
And an air motor 568 with a speed reducer for rotating the fourth rotating shaft 566. Then, the rotation shaft 566 of the valve body of the two-way valve 562 is continuously rotated by the air motor 568 with a speed reducer, so that the two-way valve 562 can repeatedly open and close the communication passage 54. .

The communication passage 54 is a communication pipe 542 arranged at the rear end of the shaft 20 in series with the shaft 20, and the inside thereof is formed so as not to hinder the rotation of the shaft 20. And a pipe 544 for communicating between the surge tank 52 and the rear end of the shaft 20 through the communication pipe 542, and an open / close valve 56 for repeatedly opening and closing the communication path 54. And a pipe 544. And the on-off valve 56
Are repeatedly opened and closed, the compressed air accumulated in the surge tank 52 is passed through the inside of the pipe 544 and the inside of the communication pipe 542 into the rear end of the rotating shaft 20,
It can be supplied intermittently.

In addition, in the air pulse pump shown in the figure, as shown in FIG. 6, a sub-communication tube 60 is provided at the rear end of the communication tube 542 so that the inside thereof communicates with the inside of the communication tube 542 to form a series. It has been extended. A door 62 that opens and closes the opening is provided at the rear end opening of the sub communication pipe 60.

At the connection point between the pipe 544 and the communication pipe 542, the communication pipe 542 and the pipe 544 are connected to each other, and the communication between the communication pipe 542 and the sub communication pipe 60 is cut off or connected. A switching valve 70 such as a three-way valve or the like is provided for communicating between the inside of the pipe 542 and the inside of the sub communication pipe 60 and for shutting off between the inside of the communication pipe 542 and the inside of the pipe 544.

The sub-communication pipe 60 is inserted into the sub-communication pipe 60 from the rear end opening thereof, passes through the sub-communication pipe 60, the communication pipe 542 communicating with the sub-communication pipe 60, and the shaft 20.
Cleaning bullet 80 sent out into the discharge port 14 of the casing
Is provided.

Further, a feeding means 90 for feeding compressed air into the rear end opening of the sub communication pipe 60 closed by the door 62.
Is provided. The feeding means 90 is a feeding pipe 92 for sending compressed air, the tip of which is communicated through the door 62 into the rear end opening of the sub communication pipe 60, and the inside of the feeding pipe 92. Opening and closing cock 94
It is composed of

The air pulse pump shown is configured as described above.

Next, an example of use of this pump and its operation will be described.

As shown in FIG. 1, a rear end of a transport pipe 100 for transporting a transported object is connected to the discharge port 14 of the casing. Then, the transport pipe 100 is laid along the transport path of the transported object.

At the same time, the switching valve 70 is operated to make the communication pipe 542 and the pipe 544 communicate with each other, and the communication pipe 542 and the sub communication pipe 60 are cut off. deep.

Next, while the shaft 20 is rotated in a predetermined direction by the air motor 40 with a speed reducer, the fluid such as ready-mixed concrete, the muddy material such as miso, A conveyed product composed of a powder, a granular material, or a mixture thereof is charged.

Then, the conveyed material can be continuously pushed in the direction of the conveyed material discharge port 14 at the tip of the casing 10 by the surface of the screw blade 30 wound around the shaft 20 rotating in the casing 10. Then, the conveyed material can be conveyed toward the discharge port 14 of the conveyed material at the tip of the casing 10 while spirally rotating between the screw blades 30 around the shaft 20 in the casing 10.

Then, the conveyed material can be continuously pushed out from the discharge port 14 at the tip of the casing 10 into the transport pipe 100 connected to the discharge port 14. And
The transported object can be continuously pushed in the transport pipe 100 to the forward side, and the transported article can be transported in the transport pipe 100 to the forward side along the transport path on which the transport pipe 100 is laid.

At that time, the air supply means 50
The compressed air can be continuously supplied into the rear end of the shaft 20 intermittently. Then, the compressed air can be intermittently discharged from the distal end of the shaft 20 through the cylindrical shaft 20 into the discharge port 14 of the conveyed material at the distal end of the casing 10. The compressed air discharged intermittently into the discharge port 14 causes the transfer pipe 1 from the discharge port 14 at the tip of the casing 10 as described above.
The conveyed material extruded into 00 can be repeatedly and strongly pushed continuously in the conveying pipe 100 toward its destination. Then, the conveyed object can be surely moved intermittently by a predetermined distance toward the end of the transport pipe 100 without being caught in the middle of the transport pipe 100.

The pressing force applied to the conveyed object from the surface of the screw blade 30 around the rotating shaft 20 and the pressing force repeatedly applied to the conveyed object by the compressed air discharged intermittently from the tip of the shaft 20. In addition, it is possible to smoothly, quickly and reliably convey the inside of the long and narrow conveying pipe 100 to the other end thereof.

Further, when an excessive load is applied from the conveyed material to the screw blade 30 wound around the shaft 20, the air motor 40 can be caused to be unable to rotate. Then, the conveyance of the conveyed article can be stopped. Then, the shaft 20 is forcibly rotated by the air motor 40 and the screw blade 30 around the shaft 20 is deformed or damaged.
Can be prevented.

When the residue of the conveyed material adheres and accumulates in the conveyed pipe 100 and the conveyed material cannot be smoothly conveyed in the conveyed pipe 100, the switching valve 70 is operated to operate the communication pipe 542. The inside and the sub communication pipe 60 are in communication with each other, and the communication between the communication pipe 542 and the pipe 544 is shut off. And the surge tank 52
The intermittent supply of the compressed air stored in the rear end of the shaft 20 through the pipe 544 and the communication pipe 542 is stopped.

Next, as shown in FIG. 6, the door 62 for opening and closing the rear end opening of the sub communication pipe 60 is opened, and the cleaning bullet 80 is inserted into the sub communication pipe 60.

Next, the rear end opening 62 of the sub communication pipe 60
Is closed by the door, and the opening / closing cock 94 of the feeding means 90 is opened to feed the compressed air through the feeding pipe 92 into the rear end opening of the sub communication pipe 60 inside the door 62.

Then, due to the pressing force of the compressed air, the cleaning bullets 80 pass through the inside of the sub-communication tube 60, the inside of the communication tube 542 communicating therewith, and the inside of the shaft 20 communicating therewith into the discharge port 14 of the casing. Can be sent out. Further, the cleaning bullet 80 can be moved to the front in the transport pipe 100 connected to the discharge port 14 of the casing by the pressing force of the compressed air. Then, by the cleaning bullets 80, the residue of the conveyed material adhered and deposited in the sub communication pipe 60, the communication pipe 542, the shaft 20, and the conveyance pipe 100 connected to the discharge port 14 of the casing is removed. It can be extruded from the inside of the communication pipe 60, the inside of the communication pipe 542, the inside of the shaft 20, and the inside of the conveyance pipe 100 to the outside of the tip of the conveyance pipe 100 to be eliminated.

In the above-described air pulse pump, the cleaning bullet 80 may be formed of a sponge material.
Then, the cleaning bullet 80 made of a sponge material having high elasticity and flexibility is placed in the sub communication pipe 60 having irregularities or bending, the communication pipe 542, the shaft 20, and the transport pipe 100. It is good to be able to move smoothly along the inside of them without resistance, with little resistance.

In the above-described air pulse pump, as shown in FIGS. 7 and 8, an inflow port 22 through which a fine substance in a conveyed material flows into the shaft 20 is provided on the distal end peripheral wall of the shaft 20. good. Then, the fine matter contained in the conveyed material is connected to the discharge port 14 of the casing by the pressing force of the compressed air, through the inflow port 22 provided on the distal end peripheral wall of the shaft 20 and the distal end of the cylindrical shaft 20. It is good to be able to send out into the transport pipe 100 which has been used. Then, the conveyed matter including other agglomerates is passed through a narrow gap between the periphery of the tip of the shaft 20 and the inner surface of the casing 10, and the discharge port 14 of the casing is discharged.
It is good to be able to send out smoothly with little resistance into the conveyance pipe 100 connected to the pipe.

In the above-mentioned air pulse pump, as shown in FIG. 7, a crushing blade 32 for crushing the agglomerates in the conveyed material is provided at the tip of the screw blade 30 wound around the shaft 20. It is good to provide. It is preferable that the crushing blade 32 provided at the tip of the screw blade 30 can finely crush the agglomerates in the conveyed material sent to the vicinity of the discharge port 14 in the casing 10 at the end of the shaft 20. . Then, it is preferable that the conveyed material sent near the discharge port 14 in the casing 10 can be uniformly homogenized into powder or small particles. Then, it is preferable that the conveyed material homogenized into the powdery or small particle form can be smoothly carried into the conveying pipe 100 connected to the discharge port 14 of the casing with little resistance.

In the above-described air pulse pump, the air motors 40 and 568 are used as driving means.
If there is one air compressor that generates compressed air, the above-described air pulse pump can be driven. However, in some cases, the driving means may be replaced with a gasoline engine or an electric motor instead of the air motors 40 and 568. A motor or the like may be used. The on-off valve 56 has 2
An electromagnetic valve may be used instead of the direction valve 562. However,
Even in this case, an air compressor for supplying compressed air to the inside of the rear end of the shaft 20 and the inside of the rear end opening of the sub communication pipe 60 is required.

[0064]

As described above, according to the air pulse pump of the present invention, a conveyed material consisting of a fluid such as ready-mixed concrete, a sludge, a powder, a granule, or a mixture thereof is conveyed to the conveyance path. By using compressed air, it is possible to continuously and smoothly convey the inside of the transport pipe laid along the route without any interruption.

[Brief description of the drawings]

FIG. 1 is a plan view of an air pulse pump of the present invention.

FIG. 2 is a front view of the periphery of a casing of the air pulse pump of the present invention.

FIG. 3 is a front sectional view of the periphery of a casing of the air pulse pump of the present invention.

FIG. 4 is a side view of the periphery of a casing of the air pulse pump of the present invention.

FIG. 5 is a sectional view taken along line AA of FIG. 3;

FIG. 6 is a front cross-sectional view of the periphery of a casing, a communication pipe, and a sub communication pipe of the air pulse pump of the present invention.

FIG. 7 is an enlarged front view around a screw blade of the air pulse pump of the present invention.

FIG. 8 is a sectional view taken along the line BB of FIG. 7;

FIG. 9 is an enlarged front view of the on-off valve of the air pulse pump of the present invention.

FIG. 10 is a cross-sectional view taken along the line CC, showing an operation state of the on-off valve in FIG. 9;

FIG. 11 is a sectional view taken along the line C-C showing an operation state of the on-off valve of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Casing 20 Shaft 22 Inflow of the fine thing in a conveyed thing 30 Screw blade 32 Crushing blade 40 Air motor with a reduction gear 50 Air supply means 56 On-off valve 562 Two-way valve 60 Sub-communication pipe 70 Switching valve 80 Cleaning bullet 90 feeding means 100 transport pipe

Claims (9)

[Claims] 1. A screw blade is erected around a cylindrical shaft that is gradually reduced in diameter as it moves toward the front and is rotatably supported in an axial direction in a cylindrical casing, and is spirally wound around the shaft. A discharge port for a conveyed material is provided at a tip of the casing, and an input port for charging the conveyed material into the casing is provided on the peripheral wall of the casing, and compressed air is intermittently supplied to a rear end of the cylindrical shaft. An air pulse pump, comprising: 2. An air supply means comprising: a surge tank for storing compressed air; a communication passage communicating between the surge tank and a rear end of the shaft so as not to hinder rotation of the shaft; The air pulse pump according to claim 1, comprising an on-off valve that opens and closes repeatedly. 3. The air pulse pump according to claim 2, wherein the on-off valve comprises a two-way valve, and an air motor with a speed reducer for rotating a rotating shaft of a valve body of the two-way valve. 4. A communication pipe, wherein the communication passage is a communication pipe arranged at the rear end of the shaft in series with the shaft, and the inside thereof is communicated with the inside of the rear end of the shaft so as not to hinder the rotation of the shaft. 4. The pipe according to claim 2, wherein the pipe communicates between the surge tank and the rear end of the shaft through the communication pipe, and is provided with an on-off valve that repeatedly opens and closes the communication path. 5. Air pulse pump. 5. A pipe is provided at a rear end of the communication pipe so as to extend in series with the inside of the sub communication pipe communicating with the inside of the communication pipe, and a door for opening and closing a rear end opening of the sub communication pipe is provided. The connection between the communication pipe and the communication pipe, the communication pipe and the pipe are communicated with each other, and the communication pipe and the sub-communication pipe are disconnected or the communication pipe and the sub-communication pipe are communicated with each other. A switching valve for shutting off between the inside of the pipe and the inside of the pipe, and inserted into the sub communication pipe from the rear end opening of the sub communication pipe to communicate with the inside of the sub communication pipe, the inside of the communication pipe communicating therewith, and the communication therewith 5. A cleaning ammunition which is fed through a shaft into a discharge port of a casing, and a feeding means for feeding compressed air into a rear end opening of a sub communication pipe closed by the door is provided. The described air pulse pump. 6. The air pulse pump according to claim 5, wherein the cleaning bullet is made of a sponge material. 7. The air pulse pump according to claim 1, wherein an inflow port through which a fine substance in a conveyed material flows into the shaft is provided in a peripheral wall of a distal end of the shaft. 8. A crushing blade for crushing granules in a conveyed material is provided at a tip of a screw blade wound around a shaft. Air pulse pump. 9. An air motor with a speed reducer for rotating a shaft is provided.
Or the air pulse pump according to 8.