JP2507607Y2 - Pneumatic transport device for powder and granular material - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is a pneumatic transfer of powder and granules, in which powder and granules such as powdered medicines and powdered foods are sent to the next process by compressed gas. Regarding the device.

(Prior Art) As a conventional pressure-feed type pneumatic transportation device for the above-mentioned powdery particles, the one disclosed in Japanese Utility Model Publication No. Sho 64-3479 filed by the present applicant is known. In this device, the transportation pipe connected to the pressure tank is connected upward to the lower position of the mixing tank, and a check valve is provided near the mixing tank of the transportation pipe to allow good mixing work of powder and granules. is there.

The above-mentioned device is characterized in that it is located upstream of the transportation pipe, and the supply control of the powdery particles from the supply hopper to the pressure tank is performed by opening and closing a valve and a shutter that are interlocked with the upper limit level of the pressure tank.

(Problems to be solved by the invention) In the above structure, the valve and the shutter are closed by the detection operation of the upper limit level while the powder and granular material is being supplied from the supply device to the supply hopper, and the supply hopper is closed. The supply operation from the to the pressurized tank is stopped. For this reason,
In particular, when processing fine powdery particles such as powdered medicines and powdered foods, the powdery particles were frequently caught by the valve and the shutter during the stopping operation. When the above biting occurs,
The valve and the shutter are in a half-opened state, which hinders the control of the supply operation of the powder or granules from the pressure tank and causes a problem that the powder or granules cannot be stably fed under pressure.

It is an object of the present invention to provide a transportation device of the above-described form, in which there is no entrapment of the granular material between the supply hopper and the pressure tank, and the granular material is stably continued to the next step. An object is to provide a pressure-feed type pneumatic transportation device capable of pressure-feeding.

(Means for Solving the Problem) In order to solve the above-mentioned problems of the conventional pressure-feed pneumatic transportation device, a sealable pressure tank having an upper charging part and a lower discharging part, and a charging part of the tank. A supply hopper for charging the powder and granules provided in, a supply device for supplying the powder and granules to the supply hopper, a transport pipe connected to the discharge part of the tank, and a pneumatic power source for pressure-feeding the powder and granules. In a powder-pneumatic pressure-feeding type pneumatic transportation device comprising: a first opening / closing device which is located between a supply hopper and a supply device and which starts or stops a supply operation for supplying the powder / granule to the supply hopper; A second opening / closing device that is located between the supply hopper and the pressure tank and that starts or stops the supply operation from the supply hopper to the pressure tank, and a pressure detector that detects a pressure drop in the pressure tank And the granular material level in the pressure tank Of the second level detector that detects the upper limit of the pressure detector and the state of the pressure detector that is activated, the operation of the pneumatic power source is stopped, the supply operation of the second switchgear is started, and the detection of the second level detector is performed. After stopping the supply operation of the first switchgear based on the operation, the supply operation of the second switchgear is stopped after a predetermined time, and the operation of the pneumatic power source is started based on the stop of the supply operation of the second switchgear. Provided is a control device for starting the supply operation of the first switchgear, and a pressure-feed type pneumatic transportation device for powder and granules.

(Operation) According to the pressure-feed type pneumatic transportation device of the present invention, the operation of the pneumatic power source is stopped and the supply operation of the second opening / closing device is started based on the state in which the pressure detector operates to detect the second level detector. After the supply operation of the first switchgear is stopped based on the detection operation of the second switchgear, the supply operation of the second switchgear is stopped after a predetermined time, and the operation of the aerodynamic power source is stopped based on the stop of the supply operation of the second switchgear. Since it is started and the supply operation of the first switchgear is started, there is no bite of powder particles between the supply hopper and the pressure tank, and the intermittent transportation work based on the pressure detection in the pressure tank. Can be carried out very stably, and the powder and granules can be stably pumped to the next step.

(Embodiment) An embodiment of the present invention will be described below with reference to FIG.

In Fig. 1, powder and granules such as powdered medicines and powdered foods contained in the pressure tank 5 are compressed by a powder and granules receiver.
A transport device for pneumatic transport to 11 is designated by reference numeral 1. That is, the transporting device 1 includes a pressure tank 5 that can be sealed and has an upper charging section and a lower discharging section, and a supply hopper 2 that is provided in the charging section of the tank 5 and that charges powder and granules. , A supply device for supplying the granular material to the supply hopper 2.
A transport pipe 8 connected to the discharge portion of the tank 5 and a compressor 10 as a pneumatic power source for powder and granular material pressure feed are provided.

The transport device 1 is further provided with a first opening / closing device, that is, a shutter 4 between the supply hopper 2 and the supply device 30, and starts a supply operation of supplying the powdery or granular material from the supply device 30 to the supply hopper 2. It is supposed to stop. Further, a second opening / closing device, that is, a valve 3 such as a butterfly valve is attached between the supply hopper 2 and the pressure tank 5, and starts or stops the operation of supplying the granular material from the supply hopper 2 to the pressure tank 5. It is like this.

Further, a first level detector 27 is provided on the upper part of the feed hopper 2.
Is attached, and the level of the granular material is detected when the granular material causes a bridge in the supply hopper 2 to reach a certain level or more. When the first level detector 27 detects the above abnormality, the supply operation of the shutter 4 is stopped by the control device (not shown).
Further, a pressure detector, that is, a pressure gauge 16 is attached to the upper portion of the pressure tank 5 so as to detect the pressure drop in the pressure tank. Furthermore, at the top of the pressure tank 5,
A second level detector 17 is attached to detect the upper limit of the level of powder or granular material in the pressure tank 5.

In this transportation apparatus 1, further, based on the state in which the pressure gauge 16 is detected and activated, the operation of the compressor 10 is stopped and the supply operation of the valve 3 is started, and based on the detection operation of the second level detector 17, After stopping the supply operation of the shutter 4,
The supply operation of the valve 3 is stopped after a predetermined time (usually 2 to 3 seconds), which is the time for completing the charging of the powder and granular material from the supply hopper 2 into the pressure tank 5, and based on the stop of the supply operation of the valve 3. A controller (not shown) for starting the operation of the compressor 10 and the supply operation of the shutter 4 is provided.

Further, a transport pipe 8 connected to this discharge part and having a funnel-shaped filter 6 fitted therein is arranged at the lower part of the pressurizing tank 5, and an upper part of the connecting pipe 7 is provided with powder particles through branch pipes 9, 9. A compressor 10, which is a power source for pumping, is connected.

A powder and granular material receiver 11 is connected to the end of the transport pipe 8, and pressure nozzles 15a and 15b for preventing closure in the transport path serve as an auxiliary role of compressed gas from the compressor 10. Can be installed. When feeding powdered material,
The pressure of the power source 10 is about 0.5 to 1.5 kg / cm ² .

Next, the operation of transporting the powdery or granular material using the transporting device 1 will be described with reference to the flowchart of FIG. 3 and the operation explanatory diagrams of FIGS. 2a to 2c.

In step 1 shown in FIG. 3, when the powder and granular material in the pressure tank 5 is all supplied to the powder and granular material receiver 11, and the pressure gauge 16 operates to detect the decrease in the internal pressure of the pressure tank 5, steps 2 and 3 are performed. If no detection operation is performed, the state is maintained.

In step 2, as shown in Fig. 2a, the compressor
The operation of 10 is stopped, and at the same time, in step 3, as shown in the figure, the valve 3 starts the supply operation (the shutter 4 is in the supply operation).

In step 4, a predetermined amount of powder or granular material is put into the pressure tank 5, and when the second level detector 17 detects the level of powder or granular material in the pressure tank 5, the process proceeds to step 5; State is retained.

In step 5, as shown in FIG. 2b, the shutter 4
Supply operation stops.

In step 6, if the elapse of a predetermined time is detected after the supply operation of the shutter 4 is stopped, the process proceeds to step 7, and if not detected, the state is held. If the supply operation of the valve 3 is stopped in step 7, the process proceeds to steps 8 and 9, and if not stopped, the state is maintained.

In step 8, as shown in Fig. 2c, the compressor
The operation of 10 is started and the transportation of the powdery particles is started, and at the same time, in step 9, the supply operation of the shutter 4 is started as shown in the same figure.

When the transportation of the granular material is completed, the pressure gauge 16 operates to detect the decrease in the internal pressure of the pressurizing tank 5, and the process returns to step 1.

By repeating the above steps 1 to 8, the transportation of the powder and granules is repeated.

In the above operation, the transportation capacity of the powder or granular material pneumatically transported from the pressure tank 5 is set so as to exceed the transportation capacity of the powder or granular material sent from the supply device 30 to the supply hopper 2. If the powder or granular material causes a bridge in the supply hopper 2, this is detected by the second level detector 27, and the supply operation of the supply device 30 is stopped based on this.

(Effects of the Invention) According to the pressure-feeding pneumatic transportation device of the present invention, there is no trapping of powder or granular material between the supply hopper and the pressure tank, and intermittent transportation based on pressure detection in the pressure tank. The work can be carried out extremely stably, and the powder and granules can be stably pumped to the subsequent step.

[Brief description of drawings]

FIG. 1 is a schematic front view of the transportation apparatus of the present invention, FIGS. 2a, 2b and 2c are operation explanatory views showing the operation procedure of this apparatus, and FIG. 3 is this apparatus. 5 is a flowchart showing the operation of the above. 1 ... Transport device, 2 ... Supply hopper, 3 ... Valve (second opening / closing device), 4 ... Shutter (first opening / closing device), 5 ... Pressurized tank, 6 ... Filter, 7 ... Connection Pipe, 8 ... Transport pipe, 9 ... Branch pipe, 10 ... Compressor, 11 ... Powder / granular material receiver, 15a, 15b ... Pressure nozzle, 16 ... Pressure gauge (pressure detector), 17 ... 2nd level detector, 27 ... 1st level detector, 30 ... Supply device.

Front page continuation (72) Inventor ▲ Sugi ▼ Takayuki Hon 1-5-7 Mikitei Sakae, Higashiosaka City, Osaka House Food Industry Co., Ltd. (56) References JP-A-55-98030 (JP, A) Actual Open Sho 63-23393 (JP, U) Actual Open Sho 59-50922 (JP, U) Actual Sho 64-3479 (JP, Y2)

Claims (1)

(57) [Scope of utility model registration request] 1. A sealable pressure tank having an upper charging section and a lower discharging section, a supply hopper for charging powder particles provided in the charging section of the tank, and powder particles in the supply hopper. In a powder-pneumatic pressure-feeding type pneumatic transportation device comprising a feeding device for feeding a body, a transportation pipe connected to the discharge part of the tank, and a pneumatic power source for feeding the granular material, a feeding hopper and a feeding device. Located between the supply hopper and the pressure tank, and the first opening / closing device for starting or stopping the supply operation for supplying the granular material to the supply hopper, and between the supply hopper and the pressure tank. Second opening / closing device for starting or stopping the supply operation to the pressure tank, a pressure detector for detecting the pressure drop in the pressurized tank, and a second level detection for detecting the upper limit of the level of the granular material in the pressurized tank. The pressure detector and the pressure detector are activated. Based on, starting the supply operation of the stop operation of the energy source and the second switching device, the second
After the supply operation of the first switchgear is stopped based on the detection operation of the level detector, the supply operation of the second switchgear is stopped after a predetermined time, and the supply of the aerodynamic power source is stopped based on the stop of the supply operation of the second switchgear. And a control device for starting the operation and starting the supply operation of the first opening / closing device.