RU2537368C1 - Chamber feeder of pneumatic transportation plant - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to pneumatic transport, namely to discharging from flexible envelope (packing) loose materials, for instance alum earth, cement, coal dust and other dust-producing and corrosive materials, using compressed gas and can be used in metallurgy, machine building, chemical and construction industry, mining ventures and other industries connected with loose material processing. Chamber feeder includes inlet chamber with cover containing discharge pipeline, discharge pipeline. Above bottom of inlet chamber, disk with skirt is placed to form closed space which is additionally connected by air duct with discharge pipeline to implement free disk vertical motion under action of compressed air. The mentioned disk with skirt is provided with hole closed by reverse-flow valve. The disk is capable of free vertical motion under action of discharge pipeline compressed air up to stopping devices. Into bottom of inlet chamber, regulator is embedded for possibility to accept filled flexible packing of various heights.

EFFECT: invention provides simplification of emptied packing extraction from chamber feeder, as well as acceptance of filled with loose material packing of various heights.

4 cl, 2 dwg

Description

The invention relates to pneumatic transport, namely, unloading from a flexible shell (container) of bulk materials, such as alumina, coal dust, cement and other dust-forming and aggressive materials, using compressed air, and can be used in metallurgy, mechanical engineering, chemical, construction, mining enterprises and other industries related to the processing of bulk materials.

Known chamber feeder pneumatic conveying installation, including a receiving chamber, cover, discharge and discharge pipelines, pipe with a knife device, a flexible container located in the receiving chamber, an air duct for communicating the cavity of the receiving chamber with the discharge pipe. Patent RU 2261214 C2, 02/10/2005, bull. Number 27.

However, in the known chamber feeder it is difficult to find a technical solution for removing empty flexible containers from the receiving chamber due to the presence of a discharge nozzle with a knife device in its lower part.

Also known is a chamber feeder of a pneumatic conveying installation, comprising a receiving chamber with a lid containing an unloading pipe, a discharge pipe, a flexible container placed in a receiving chamber, an air duct for removing excess air from an enclosed space into the unloading pipe. Patent RU 2323151. 04/27/2008, bull. No. 12.

However, in the known device there is no additional device for removing empty flexible packaging from it. The known device is not intended for receiving filled with bulk material flexible containers of various sizes in height.

The objective of the invention is to increase the use of chamber feeders for various design parameters of flexible containers filled with granular material in height and to ensure automation of the process of extracting empty flexible containers from the chamber feeder.

The technical result of the invention is such a design of the chamber feeder, which provides the reception filled with bulk material of flexible containers of various sizes in height and the process of extracting empty containers from the receiving chamber under the influence of compressed air.

This is achieved by the fact that in the chamber feeder of the pneumatic conveying installation, which includes a receiving chamber with a cover containing a discharge pipe, an unloading pipe, a flexible container placed in the receiving chamber, an air duct for removing excess air from an enclosed space into the discharge pipe, a disk with skirt for the formation of the aforementioned enclosed space, which for the free movement of the disk vertically under the influence of compressed air but the said duct with discharge pipe. Said disk with a skirt is provided with an opening blocked by a check valve. The upper part of the receiving chamber is equipped with locking devices to limit the vertical movement of the disk. The bottom of the chamber feeder is equipped with a screw device for receiving filled flexible containers of different heights.

Figure 1 shows a chamber feeder of a discharge pneumatic conveying installation; figure 2 - chamber feeder in unloading condition.

The chamber feeder comprises a receiving chamber 1 with a lid pivotally mounted on it 2. A flexible (soft) container (container) 3 with bulk material in the closed state is placed in the receiving chamber 1. The discharge pipe 4 is mounted on the cover 2. The discharge pipe 5 includes a pipe 6 with a discharge nozzle 7 with the possibility of free movement along it. The blade of the knife device 8 is directed downward to cut the upper part of the flexible container 3. To remove excess air through the duct 9, the bottom 10 of the receiving chamber 1 is equipped with a pipe 11. To remove the flexible packaging 3 from the chamber feeder, the receiving chamber 1 is equipped with a disk 12 with a skirt 13. Installing a disk 12 at a certain distance from the bottom 10 of the chamber 1 is provided with a screw device 14. The enclosed space 15 of the receiving chamber 1 communicates with the discharge pipe 4 through the valve 16 and with the discharge pipe 5 through the valve 17 of the duct. The valve 18 of the transport pipeline is designed to shut off and supply compressed air to the discharge nozzle 7. The disk 12 has the ability to freely move vertically to the locking device 19. The disk 12 is provided with an opening 20 closed by a check valve 21.

When the lid 2 is open, the container 3, filled with bulk material, in the closed state is lowered into the receiving chamber 1. When the flexible container 3 falls in a closed space between its bottom and the disk 12, excess air is formed. This excess air through the hole 20 of the check valve 21 of the disk 12 is discharged through the pipe 11 of the pipe 9 (dashed arrow) through the valve 16 into the transport pipe 4. The cover 2 is closed. The pipe 6 under the action of its own weight freely moves along the discharge pipe 5 down. The knife device 8 with a force of the weight of the cover 2 and the pipe 6 cuts the upper part of the flexible containers. After opening the valve 18 with the closed valves 16 and 17, air (solid arrow) is supplied through the pipe 6 and the injection nozzle 7 into the flexible container 3. The upper layers of bulk material in the flexible container 3 are aerated, becoming fluid, and are forced out by compressed air into the transport pipeline 4. During the supply of compressed air into the cavity of the flexible container 3, its walls are pressed against the walls of the receiving chamber 1. After emptying the container 3, the valve 18 is closed, and the supply of compressed air through the discharge nozzle 7 is stopped. The cover 2 is opened with closed valves 17 and 18. In the process of lifting the cover 2, the pipe 6 with the knife device 8 and the discharge nozzle 7 is lowered into the cavity of the discharge pipe 5 (figure 2). When the valves 16 and 18 are closed, compressed air (solid arrow) is fed through the open valve 17 into the enclosed space 15. Under the action of compressed air, the disk 12 rises to the locking device 19, while raising the emptied flexible container 3 to the upper position for its removal from the chamber 1 The skirt 13 is a guide, counteracting any skew of the disk 12 moving upward. Installing the disk 12 at a certain distance from the bottom 10 of the camera 1 is provided by installing a screw device 14. In this case, the flexible containers are unloaded Noah height.

Studying the processes of receiving loaded and extracting empty flexible containers from a chamber feeder at a pilot plant allowed the following conclusion. The presence of the disk 12 with the skirt 13, the holes 20 with the check valve 21 and the locking device 19 (FIG. 2) of the height of the disk in the proposed device simplifies not only the process of removing the emptied container 3 from the chamber feeder, but also its reception filled with bulk material. The presence of a screw-shaped device 14 allows you to take filled flexible material flexible containers 3 with different heights.

Claims (4)

1. A chamber feeder of a pneumatic conveying installation, including a receiving chamber with a cover containing an unloading pipe, a discharge pipe, a flexible container placed in the receiving chamber, an air duct for removing excess air from an enclosed space into the discharge pipe, characterized in that a disk with a skirt for the formation of the aforementioned enclosed space, which for additional free movement of the disk vertically under the influence of compressed air is additionally reported said duct with discharge pipe. 2. The chamber feeder according to claim 1, characterized in that the said disk with a skirt is provided with an opening blocked by a check valve. 3. The chamber feeder according to claim 1, characterized in that the upper part of the receiving chamber is equipped with locking devices to limit the vertical movement of the disk. 4. The chamber feeder according to claim 1, characterized in that the bottom of the chamber feeder is equipped with a screw device for receiving filled flexible containers of different heights.

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