RU29920U1 - Device for pneumatic transportation of bulk materials - Google Patents

Description

2002117721

Ililli

Device for pneumatic transportation of bulk materials

The utility model relates to the field of pneumatic conveying of bulk materials by compressed air under pressure in the cement and metallurgical industries.

A device of a pneumatic conveying installation for moving bulk materials is known, a curing tank with a loading device, an unloading pipe connected to a transport line, and a supply pipe with shut-off and control valves for supplying compressed air to the tank. A porous one is installed in the lower part of the tank, forming a lower chamber connected to the compressed air supply pipe (France, application No. 2332210, B 65 G 53/22, Publ. 22.07.77. No. 29). The supply of material from the tank to the discharge pipe is controlled depending on the pressure in the transport line. After a set of pressure in the tank, the bulk material transported, moving with air at the inlet of the discharge pipe, enters the transport line with a certain concentration of air mixture and transport speed, which can be automatically adjusted during the unloading of the device chamber depending on the pressure in the transport line.

The disadvantage of this device is that the speed of transportation of the material depends on the change in pressure of the supplied compressed air, which takes place in domestic factories. In the event of a decrease in pressure or excessive filling of the line with material, the transportation speed decreases below critical, blockages and plugs form in the line and the transportation process is interrupted. Clearing the transport line leads to large labor costs, loss of time, excessive consumption of compressed air.

MPKV65S

Closest to the claimed one is a vertical feeder for pneumatic feeding of powder material (Application B. Britain K "1478738 B 65 G 53/66 from 4.06.75g, Pub. 6.07.77. N4606 adopted for the prototype), including a tank with a loading device, a vertical discharge pipe connected to the transport line, a porous base with a nozzle, and a compressed air pipe leading to it, in which a shut-off valve with pneumatic control is installed, which automatically controls the air supply to the transfer pipe.

The disadvantage of this design is that the regulation of the concentration of the air mixture by changing the air supply to the distillation pipe does not take into account such factors as the composition of the material, the change in the length of the transport line, the pressure of the supplied compressed air, the speed of transportation, i.e. -. It does not fully ensure the process of stable transportation of material, the exclusion of traffic jams in the trunk, and the reduction of air consumption for transportation.

The utility model is based on the task of creating a device for pneumatic transportation of bulk materials, ensuring the stability of the transportation process, preventing blockages and traffic jams in the highway, reducing specific air consumption and labor costs for maintenance.

The achievement of the above technical result is ensured by the fact that a device containing a sealed chamber, an unloading pipe connected to a transport highway, and a supply manifold connected by a pipe to a sealed chamber in its lower part, on which a remotely controlled shut-off valve, a supply manifold is additionally connected to the discharge a pipe bypass pipe on which a flowmeter is installed with one or two control contacts, the latter are connected by a control signal with a shut-off valve with the ability to switch it.

The essence of the utility model lies in the fact that the bypass pipe in the transport mode delivers constantly compressed air to the transported line with a given velocity of the air mixture, and from the sealed chamber with the shut-off valve open, the material is fed into the transport line in a dense phase through the discharge pipe.

During transportation, when filling the line with material, or reducing the supply pressure, the flow rate may decrease to a critical value (pre-plug condition), and then, according to the flowmeter signal, the shut-off valve automatically closes, temporarily stopping the flow of material to the transport line until the optimal transportation speed is restored in the highway; after which, the valve automatically resumes the flow of material into the line, etc. until the full breakdown cycle.

The specified mode ensures the stability of the transportation process, prevents the formation of blockages of material in the line, allows to increase the density of air mixtures, thereby reducing the specific air consumption for transportation, reduced labor costs for maintenance.

The essence of the utility model is illustrated by the drawing, which shows a variant of the installation design.

The device consists of a sealed chamber 1, a loading device 2 with a valve 3, an outlet pipe 4, lowered at one end into the chamber 1 and connected to the transport line 5, and a supply manifold 6 with a compressed air supply valve 7.

The collector 6 is connected by a pipe 8 through a shut-off valve 9 with a sealed chamber 1 in its lower part, and is additionally connected by a bypass pipe 10 to a reheat pipe 4. A flow meter 11 is additionally installed on the bypass pipe 10 with a recording device

12 provided with two control contacts K1; K2, electrically connected to a remotely controlled shut-off yutapan 9 with the ability to switch it.

The control contact K1 is configured for the minimum allowable air flow (speed of the traffic flow in the highway), which still ensures a stable process of transporting air mixtures.

The control contact K2 is configured to partially unload the transport line 5 until the optimal transportation process resumes; (the option of replacing contact K2 on the Time Relay is possible).

The device operates as follows. In the initial state, the chamber 1 is empty, the compressed air supply valve 7 is closed, the pressure in the sealed chamber 1 is absent. Stop valve 9 is open. After filling the chamber 1 with material 13 through the infusion device 2, the valve 3 closes, and the device enters the blouse mode. At the same time, valve 7 opens, and compressed air enters the transport line 5 through the manifold 6 and the bypass pipe 10, forming the main transport stream with an adjusted transport speed. At the same time, compressed air from the manifold 6 enters through the nozzle 8 into the sealed chamber 1, where pressure builds up. In this case, the material

13, partially mixed with air in the lower part of the chamber 1, it is squeezed out in a dense layer into the nozzle 4 and then enters the transport air stream, moving with it in a certain adjusted concentration and acquiring the necessary speed of movement.

In the process of transportation, as the line 5 is filled with material, the transportation speed decreases to a value corresponding to a stable transportation process, and is constantly monitored by the flow meter I. In case of overfilling of the line 5 with the transported material 13 or reduction of the applied pressure

of compressed air, the speed of the transport stream decreases to a critical value, and by the signal of contact K1 of the recording device 12, the shutoff valve 9 automatically shuts off the air supply to the chamber 1, and the material 13 to the transport line 5 is temporarily stopped. As the highway 5 is unloaded, the transfusion speed will begin to increase to the optimum value, and by the signal of contact K2, the shutoff valve 9 opens, resuming the supply of material 13 from the sealed chamber 1 to the transport highway 5, etc. -to completely unfocus camera 1, after which the device automatically turns off and switches to boot mode.

Thus, the automatic regulation of the Process of transporting bulk materials within predetermined limits allows increasing the density of the pumped a xx: mesi, i.e., reducing the specific air consumption for transportation, preventing blockages and traffic jams in the mains, and reducing labor costs for maintenance,

Currently, the described device has been tested and implemented at a number of non-ferrous metallurgy enterprises with positive results achieved.

Claims (1)

A device for pneumatic transportation of bulk materials containing a sealed chamber, an unloading pipe connected to a transport line, and a supply manifold connected by a pipe to a sealed chamber in its lower part, on which a remotely controlled shut-off valve is installed, characterized in that the supply manifold is additionally connected to discharge pipe bypass pipe, on which a flow meter is installed with one or two control contacts, the latter are connected by a signal ION with shutoff valve with the possibility of switching.