JPH0616237A - Bulk material feeder - Google Patents

Abstract

PURPOSE:To provide a bulk material feeder capable of conveying-feeding bulk material efficiently and preventing the contraflow of the bulk material. CONSTITUTION:The upper ends of a longitudinal carrier part for conveying bulk material from hopper parts 10 longitudinally downward by the fixed quantity are connected in the communicated state to the lower ends of the hopper parts 10 for storing the bulk material, and the base end of a diffuser part 4 for sucking the conveyed bulk material is connected in the communicated state to the lower end of the longitudinal carrier part. A nozzle part 5 is disposed near a connecting part between the diffuser part 4 and the longitudinal carrier part, and pressure air along the bulk material feed direction can be jetted toward the diffuser part 4 from the nozzle part 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder / granule supply device capable of transporting / supplying powder / granulate by compressed air.

[0002]

2. Description of the Related Art Conventionally, as one form of powdery or granular material feeder,
As described in Japanese Utility Model Laid-Open No. 61-181024, at the lower end of the hopper section for storing the powder and granular material, there is a horizontal transfer section for laterally transferring the powder and granular material from the hopper section. There is a structure in which one end is communicatively connected, and the other end of the horizontal conveying unit is communicatively connected with a powdery or granular material pressure-feeding conduit that pressurizes powdery or granular material by pressure air supplied from a pressure air source.

[0003]

However, in the case of the above-mentioned powdery or granular material supply device, the powdery or granular material stored in the hopper is laterally conveyed to the powdery granular material feeding line by the horizontal conveying unit such as a screw conveyor. Therefore, there is a problem that the efficiency of transporting the powder and granules is poor.

Therefore, it is necessary to increase the number of rotations of the screw conveyor or the like which is the lateral conveying section, but it is necessary to increase the horsepower of the motor for driving the screw conveyor or the like. There was a problem of being bad.

Further, the pressure air from the powder and granular material pressure feeding line flows back to the side of the lateral carrier, causing the powder and granular materials to flow back into the lateral carrier section.
There is also a problem that the horizontal transportation of the powder and granular material is disabled by the horizontal transportation unit.

[0006]

Therefore, in the present invention, at the lower end of the hopper portion for storing the granular material, a vertical portion for vertically conveying a certain amount of the granular material from the hopper portion downward is provided. The upper end of the transfer unit is connected and connected, and the lower end of the vertical transfer unit is connected to the base end of the diffuser unit for sucking the powder particles that have been transferred, and the diffuser unit and the vertical transfer unit are connected. To provide a powdery or granular material supply device characterized in that a nozzle portion is disposed in the vicinity of the powdery portion, and compressed air along the powdery or granular material supply direction can be ejected from the nozzle portion toward the diffuser portion. Is.

The present invention is also characterized by the following configuration.

The nozzle portion is moved forward and backward with respect to the valve seat formed at the base end inflow port of the diffuser portion so that the outer peripheral surface of the tip end portion of the nozzle portion can be brought into contact with and separated from the nozzle portion, and at the same time the nozzle portion is formed. A pressure sensor is installed in the control unit, the pressure change detection output from the pressure sensor is input to the control unit, and the control unit presses the nozzle unit against the valve seat to stop the supply of powder or granular material from the diffuser unit. And that.

A check valve is provided at the lower end of the vertical conveyance section.

A plurality of hoppers are provided in the hopper section, and the vertical transfer section is connected to each hopper through a communication pipe.

A rotary feeder is provided in the middle of the communication pipe.

[0012]

[Function] When transporting / supplying the powder / granular material, the powder / granular material is supplied from the hopper portion to the vertical transfer portion, and the powder / granular material is transferred downward by the vertical transfer portion, and at the same time, from the nozzle portion to the diffuser portion. When compressed air is ejected toward the powder granules, a negative pressure is generated around the diffuser part, and the jet ejector action by this causes a suction force acting on the powder granules toward the diffuser part. It is possible to reliably transport and supply the granular material in the granular material supply direction.

At this time, since the vertical conveying section can convey the powdery particles downward from the hopper section, the powdery particles can be efficiently conveyed by utilizing the gravity. The operating cost can be reduced by reducing the power consumption of the drive unit that drives the transport unit.

If the tip end injection port of the diffuser part is clogged with powder and the pressure at the base end inlet side of the diffuser part becomes high, the pressure sensor detects the pressure change, and the detection output is controlled by the control part. Is input to move the nozzle part to the valve seat side formed at the base end inlet of the diffuser part, and the outer peripheral surface of the tip part of the nozzle part is pressed against the valve seat to close the base end inlet of the diffuser part. Valve to prevent the granular material from being conveyed from the vertical conveying section to the diffuser section, while the compressed air blown out from the nozzle section blows off the clogged granular material at the tip end ejection port of the diffuser section. Can be resolved.

When the pressure sensor detects that the pressure detected by the pressure sensor has returned to the normal pressure, the control unit inputs the same detection output to cause the nozzle unit to move backward and the base end flow of the diffuser unit. The inlet can be opened, and the granular material can be transported and supplied as before.

Therefore, it is possible to reliably prevent the powder or granular material from flowing backward to the vertical conveying portion side, and it is possible to ensure efficient powder or granular material transportation.

Further, by providing a check valve at the lower end of the vertical conveying unit, it is possible to more reliably prevent the backflow of the granular material to the vertical conveying unit.

Further, a plurality of hoppers are provided in the hopper section, and the vertical transfer sections are connected to the respective hopper sections through the communication pipes, respectively, so that one of the hoppers supplies the granular material to the vertical transfer section. Then, when the inside of the same hopper becomes empty, it is possible to subsequently supply the granular material from the other hopper to the vertical conveyance section, and during that time, by replenishing the empty hopper with the granular material, The powdery particles can be continuously supplied to the vertical conveying unit, and the powdery particles can be continuously transported.

At this time, by providing a rotary feeder in the middle of the communication pipe, a certain amount of powder or granular material can be reliably supplied from each hopper to the vertical conveying section.
Good transportation of the powder can be ensured.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, A is a powdery or granular material supply device according to the present invention, B is an air compressor for supplying pressurized air to the powdery or granular material supply device A, and C is an electric compressor for the air compressor B. Is a generator for supplying powder, D is a silo for supplying powder to the powder supply device A, and E is a backhoe for transporting and supplying powder from the powder supply device A. In the present embodiment, the soil improving material as the granular material is transported and supplied from the granular material supplying device A into the bucket a of the backhoe E as the soil improving machine, and the soft ground excavated by the bucket a, etc. The soil improvement material can be mixed into the excavated soil.

A powdery or granular material supply device A according to the present invention is shown in FIGS.
As shown in FIG. 4, a hopper portion 2 for storing powder particles is provided on an upper portion of a support frame 1 framed in a rectangular box.
The lower end of the hopper unit 2 is connected to the upper end of a vertical conveying unit 3 for vertically conveying the granular material from the hopper unit 2 by a fixed amount in a downward direction. The base end of the diffuser part 4 for sucking the powder and granules has been connected and connected, and the nozzle part 5 is arranged in the vicinity of the communication part between the diffuser part 4 and the vertical transfer part 3. Further, it is possible to eject the compressed air toward the diffuser portion 4 along the powder and granular material supply direction.

The hopper section 2 is composed of a pair of left and right hoppers 10,1.
The upper ends of the communication pipes 11 and 11 are connected to the respective lower ends of 0, and the lower ends of the communication pipes 11 and 11 are connected to the casing 12 of the vertical transfer unit 3 described later. The rotary feeders 13 and 13 are provided so that the powder particles in the hoppers 10 and 10 can be supplied to the casing 12 of the vertical transfer unit 3 in fixed amounts by the rotary feeders 13 and 13, respectively. 14 is a rotary feeder drive motor, and 15 is a drive belt.

Further, in FIGS. 1 and 2, reference numeral 16 is a powdery or granular material supply pipe interposed between the pair of left and right hoppers 10, 10 and the powdery or granular material charging silo D, and the tip of the supply pipe 16 is provided. Is branched into two branches to form branch pipes 16a, 16a, and the tips of the branch pipes 16a, 16a are connected to the hoppers 10, 10 respectively.

Then, a switching damper 17 is provided at the branching portion of the powder and granular material supply pipe 16, and the switching damper 17 is used for each hopper.
It is possible to supply powder and granules to 10 and 10, respectively. 22 is a vibrator attached to the hopper 10.

The vertical conveying section 3 has a screw conveyor 18 disposed in a casing 12 extending vertically, and an upper end of a conveyor shaft 18a of the screw conveyor 18 is hermetically sealed above the casing 12. The upper end of the conveyor shaft 18a is linked to a conveyor drive motor 19 mounted on the upper wall of the casing 12.

Moreover, a check valve 20 is provided at the lower end of the casing 12, and the check valve 20 is a screw conveyor.
Although the extrusion of the powder and granules by 18 is allowed, the backflow of the pressurized air from the nozzle portion 5 can be prevented. Reference numeral 20a is a check valve body, and 20b is a check valve body biasing spring.

In the diffuser portion 4, the base end inlet 4b of the diffuser body 4a is connected to the lower end of the casing 12 so as to extend the diffuser body 4a in a substantially horizontal direction, and the tip end discharge port 4b is formed at the tip. And a powder / particle transport / supply pipe 21 is connected to the tip end ejection port 4c (see FIG. 1).

Further, the inner peripheral surface of the base end inlet 4b does not serve as a valve seat against which the tip of the nozzle body 5b, which will be described later, comes into pressure contact, and the valve seat and the tip of the nozzle body 5b form an on-off valve 26 '. is doing.

The nozzle part 5 is connected to the lower end of the casing 12 so that the nozzle guide cylinder 5a is positioned on the same axis as the diffuser main body 4a and communicates therewith, and the cylindrical nozzle main body 5b is inserted in the nozzle guide cylinder 5a. The nozzle is inserted slidably in the forward and backward directions, the forward and backward drive cylinders 5c are interlocked with the base end of the nozzle body 5b, and the air compressor B is inserted in the middle of the nozzle body 5b through the pressure air supply pipe 23. A pressure sensor 24 is attached to an intermediate portion of the supply pipe 23, and the pressure sensor 24 is connected to a control unit 25 provided on the support frame 1.

The control unit 25 is adapted to drive each drive unit in accordance with a powder amount supply program, and in particular, the diffuser unit 4 is driven by the pressure sensor 24.
When a pressure change (pressure increases) on the base end inlet 4b side is detected, the nozzle body 5b is advanced by the forward / backward drive cylinder 5c, and the tip end of the diffuser body 4a serves as a valve seat. The end inlet 4b is brought into pressure contact with the valve so that the valve can be closed. Reference numeral 26 denotes an operation panel unit connected to the input side of the control unit 25. By operating the operation panel unit 26, it is possible to operate the powdery or granular material supply device A via the control unit 25. There is.

The embodiment of the present invention is configured as described above, and according to this embodiment, the following operational effects are produced.

That is, when the granular material is transported / supplied into the bucket a of the backhoe E, the granular material is supplied from the hopper section 2 to the vertical conveying section 3 and the vertical granular section 3 conveys the granular material. When the compressed air is conveyed from the nozzle portion 5 toward the diffuser portion 4 along the powder and granular material supply direction while being conveyed downward, a negative pressure is generated in the vicinity of the proximal end inlet port 4b of the diffuser portion 4, which causes Due to the jet ejector action, a suction force is exerted on the granular material toward the diffuser portion 4, so that the granular material can be reliably transported and supplied in the granular material supply direction.

At this time, since the vertical conveying unit 3 can convey the powdery particles downward from the hopper, the powdery particles can be efficiently transferred by utilizing gravity.
The operating cost can be reduced by reducing the power consumption of the conveyor drive motor 19 that drives the vertical transport unit.

If the tip end injection port 4c of the diffuser unit 4 becomes clogged with powder and the pressure at the base end inlet port 4b side of the diffuser unit 4 becomes high, the pressure sensor 24 detects the pressure change and The control unit 25 inputs the detection output and the nozzle unit main body
5b is advanced to the valve seat side formed in the proximal end inlet port 4b of the diffuser portion 4, and the outer peripheral surface of the tip end portion of the nozzle portion main body 5b is pressed against the valve seat side to form the proximal end inlet port 4b of the diffuser portion 4.
Is closed to prevent the granular material from being conveyed from the vertical conveying unit 3 to the diffuser unit 4, while the compressed air ejected from the nozzle unit body 5b causes the tip end ejection port 4c of the diffuser unit 4 to be ejected.
The clogs can be cleared by blowing away the clogged powder.

When the pressure sensor 24 detects that the pressure detected by the pressure sensor 24 has returned to the normal pressure, the control unit 25 inputs the detection output to the nozzle body 5b.
Can be moved backward to open the base end inflow port 4b of the diffuser part 4, and the granular material can be transported and supplied as before.

In this way, it is possible to reliably prevent the granular material from flowing back to the vertical conveying section 3 side, and it is possible to ensure efficient transportation of the granular material.

Further, since the check valve 20 is provided at the lower end portion of the vertical conveying unit 3, it is possible to more reliably prevent the reverse flow of the granular material to the vertical conveying unit 3.

Further, the hopper section 2 has two hoppers.
10 and 10 are provided, and the hoppers 10 and 10 are connected to the vertical transfer unit 3 through the communication pipes 11 and 11, respectively, so that one of the hoppers 10 supplies the vertical transfer unit 3 with powder and granules. When the hopper 10 becomes empty, the other hopper 10 can subsequently supply the powdery particles to the vertical transfer unit 3, and during that time, the powdery particles are charged into the hopper 10 that has become empty. By replenishing it via the switching damper 17, it is possible to continuously supply the granular material to the vertical transport unit 3 and continuously transport the granular material.

At this time, since the rotary feeders 13, 13 are provided in the middle of the communicating pipes 11, 11, each hopper is
10, 10, a certain amount of powder or granules can be reliably supplied to the vertical transport unit 3, and the powder or granules can be reliably transported.

5 to 7 show a powdery or granular material supplying device A as another embodiment. In the powdery or granular material supplying device A, the lower end of the communicating pipe 11 is connected to the casing 12 so as to communicate with each other. Communication pipe 11
The upper part of the branch communication pipes 11a, 11a is formed by bifurcating the upper part of the branch, and the upper ends of the branch communication pipes 11a, 11a are respectively connected to the hopper 1
The lower end of each of 0 and 10 are connected to communicate with each other, and the supply conveyor 28 is laid across the branching portion 27 of the communication pipe 11 in an airtight manner, and by the supply conveyor 28, one of the hoppers 10 passes through the communication pipe 11 into the casing 12. It is possible to supply powder and granules. 29 is a conveyor drive mechanism.

[0042]

According to the present invention, the following effects can be obtained.

Since a certain amount of powder or granular material is conveyed from the hopper portion to the diffuser portion in the downward and vertical direction by the vertical conveying portion, the powder or granular material can be efficiently conveyed by utilizing gravity. It is possible to reduce the operating cost of the whole powder and granular material supply device.

When the tip end injection port of the diffuser portion is clogged with powder or granular material, the outer peripheral surface of the nozzle portion is pressed against a valve seat formed at the base end inlet of the diffuser portion to prevent the powder or granular material from flowing backward. At the same time, the clogging of the granular material can be eliminated by the pressure air ejected from the nozzle portion, so that the transport / supply function of the granular material can be well ensured.

Since the check valve is provided at the lower end of the vertical conveying unit, it is possible to more reliably prevent the reverse flow of the powdery particles to the vertical conveying unit.

Providing a plurality of hoppers in the hopper section,
Since powders and granules can be sequentially supplied from each hopper to the vertical transport unit, it is possible to satisfactorily secure continuous supply of powders and granules to the vertical transport unit and further continuous transport of powders and granules. it can.

Since the rotary feeder is provided in the middle of the communicating pipe for communicating and connecting each hopper and the vertical conveying section, it is possible to reliably supply a certain amount of powdery particles from each hopper to the vertical conveying section. As a result, it is possible to satisfactorily secure the transportation of the powder and granules.

[Brief description of drawings]

FIG. 1 is an explanatory view of a usage state of a powdery or granular material supply device according to the present invention.

FIG. 2 is a partially cutaway front view of the same device.

FIG. 3 is a partially cutaway side view of the device.

FIG. 4 is a partially cutaway enlarged front view of the main part.

FIG. 5 is a partially cutaway front explanatory view of a powdery or granular material supply device as another embodiment.

FIG. 6 is a partially cutaway front view of the same device.

FIG. 7 is a partially cutaway enlarged front view of the main part.

[Explanation of symbols]

 A powder-and-granule supply device B air compressor C generator D-silver-loading silo E backhoe a bucket 1 support frame 2 hopper section 3 vertical transfer section 4 diffuser section 5 nozzle section 10 hopper 11 communicating pipe 12 casing 13 rotary feeder

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location // B65D 88/54 6916-3E

Claims (5)

[Claims] 1. An upper end of a vertical transport unit for vertically transporting a certain amount of powder particles from the hopper unit downward is connected to a lower end of a hopper unit for storing the powder particles, At the lower end of the vertical conveying unit, the base end of the diffuser unit for sucking the conveyed granular material is connected and connected, and the nozzle unit is arranged in the vicinity of the connecting unit between the diffuser unit and the vertical conveying unit, A powdery- or granular-material supply device capable of ejecting pressurized air along the powdery- or granular-materials supply direction from the nozzle portion toward the diffuser portion. 2. An on-off valve is formed by advancing and retracting a nozzle portion to a valve seat formed at a base end inlet of a diffuser portion so that an outer peripheral surface of a distal end portion of the nozzle portion can be brought into contact with and separated from the valve seat. A pressure sensor is installed in the nozzle section, and the pressure change detection output from the pressure sensor is input to the control section, and the control section presses the nozzle section against the valve seat to supply the granular material from the diffuser section. The powdery or granular material supply device according to claim 1, wherein the powdery or granular material supply device can be stopped. 3. The powdery- or granular-material feeder according to claim 1, wherein a check valve is provided at the lower end of the vertical conveying section. 4. A plurality of hoppers are provided in the hopper section,
2. The powdery- or granular-material feeder according to claim 1, wherein a vertical conveying unit is connected to each hopper through a communication pipe. 5. The powdery- or granular-material feeder according to claim 4, wherein a rotary feeder is provided in the middle of the communication pipe.