JPH04121934U - Air injection nozzle for pressure tank - Google Patents

Abstract

(57) [Summary] [Objective] To provide an air injection nozzle that can prevent powder particles in a pressure tank from flowing back into the nozzle when injection of compressed air is stopped and can be manufactured at low cost. [Structure] A flexible tube 22 is inserted into a blind hole 17 of a nozzle body 16, and a slit 23 is provided at the intersection of the tube 22 and the air jet port 3.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention injects compressed air into a pressure tank in a pneumatic transportation device for powder and granular materials. This will improve the fluidity of the transported powder and granules by preventing bridging. Ru.

0002

[Conventional technology]

Previously, pressure tanks were used to transport powder and granules that were prone to bridging and transport interruptions. When transporting by air, for example, as disclosed in Japanese Patent Publication No. 59-45571, Compressed air is injected from numerous air injection nozzles installed inside the power tank to remove powder and granules. It's becoming fluid. By the way, regarding this nozzle, when the injection of compressed air is stopped, the pressure The residual pressure inside the tank causes the powder to flow back into the nozzle, causing moisture-containing powder to be included in the powder. If so, the nozzle may become clogged. Therefore, in order to improve the above drawbacks, For example, an air release device as disclosed in Japanese Utility Model Publication No. 64-1295 was devised. There is. This device circularly sends compressed air to the tip of the compressed air blowout pipe 13. An air outlet 19 having a V-groove cross section that radiates in the circumferential direction is provided. The O-ring valve 20, which expands when it receives air and opens the outlet 19, is tightly attached. This prevents the powder from flowing backwards.

0003

[Problem that the invention attempts to solve]

However, the configuration of the above air release device is unique, and it is necessary to manufacture a new pressure tank. However, when installing to an existing pressure tank, the existing nozzle must be discarded. Must be. This means that dozens of air release devices are installed in one pressure tank. If it is installed, the cost will increase significantly. This idea was designed in light of these circumstances. The nozzle is not blocked by backflow powder and granules, and the It is possible to reuse the existing nozzle, so there is no need to increase the installation cost. The purpose is to provide injection nozzles.

0004

[Means to solve the problem]

In order to achieve the above purpose, this invention has an air injection nozzle for pressure tank inside A blind hole is drilled in the tip, an air outlet communicating with the blind hole is drilled in the side of the tip, and pressure is applied to the base. The nozzle body has an attachment part to the inner wall of the power tank, and a flexible nozzle that is inserted into the blind hole mentioned above. and an intersecting part with the air outlet at the tip of the tube. The gist is that a slit is provided along the axis.

[0005]

【composition】

Hereinafter, the present invention will be explained in detail based on one embodiment. Figure 1 shows an overview of the pneumatic transport device. A schematic diagram, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG. 3 is an air injection nozzle according to the present invention. FIG. 4 is a cross-sectional view of the flexible tube. In the figure, 1 is a pressure tank, and the lower inclined surface of the tank 1 has many Air injection nozzles 2 are installed at approximately equal intervals, and the air of each nozzle 2 is The jet nozzle 3 is configured to jet compressed air horizontally along the inclined surface. In addition, a lid 4 is installed at the upper opening of the pressure tank 1, and a cylinder (not shown) is extended. The cover 4 is formed to lower and rise due to compression, opening and closing the opening of the pressure tank 1. It is. 5 is a receiver tank, which communicates with a compressed air source 7 via a conduit 6; ing. Further, branch pipes 9 and 11 are connected to the receiver tank 5 via a conduit 8. , the end of the branch pipe 9 communicates with the air injection nozzle 2 via the conduit 12, and the branch pipe 9 The terminal of 11 is connected to the vicinity of the base of the transport pipe 13 which communicates with the lower end of the pressure tank 1. is formed. Note that 14 is an on-off valve.

[0006] In the air injection nozzle 2, 16 is a nozzle body; A blind hole 17 that opens toward the proximal end is bored inside the nozzle 6. An air outlet 3 communicating with the blind hole 17 is bored in the side of the tip of the body 16. Furthermore, the conduit 1 is provided on the inner wall surface of the pressure tank 1 on the outer circumference of the proximal end of the nozzle body 16. A screw groove 21 that can be screwed into the nozzle mounting hole 19 that is bored and communicates with the nozzle 2 is formed. There is. A flexible tube 22 is inserted into the blind hole 17, and the tube 2 There is one slot in the axial direction at the intersection with the air jet port 3 at the tip of the air outlet 2. A cut (cut) 23 is provided.

[0007]

[Effect]

Next, the operation of this nozzle will be explained. Operate a cylinder (not shown) to open the lid 4. After putting the powder into the pressure tank 1 and closing the lid 4, open the on-off valve 14. When compressed air is supplied from the receiver tank 5, some of it is supplied to the conduit 8, It reaches the air injection nozzle 2 through the branch pipe 9 and the conduit 12, and the slit in the tube 22 23 and blows it out from the air outlet 3 into the pressure tank 1, thereby increasing the pressure. The powder in the force tank 1 is fluidized. On the other hand, the rest of the compressed air is The air is ejected into the transport pipe 13 through the branch pipe 11, and the air is ejected from the nozzle 2. The powder and granular material in the pressure tank 1 is then transported via the transport pipe 13. Next, open/close valve 1 When 4 is closed and the supply of compressed air is stopped, the slit 23 of the tube 22 is closed. . At this time, the powder and granules in the pressure tank 1 are released from the air outlet 3 of the nozzle 2 due to the residual pressure. The liquid tries to flow back into the nozzle 2, but is blocked by the tube 22. Furthermore, the nose The air outlet 3 of the nozzle 2 may become clogged with powder and granules, which then flow to the nozzle 2. It can be easily blown away when compressed air is supplied.

[0008]

[Effect of the idea]

According to the present invention as described above, when the injection of compressed air is stopped, the powder and granules in the pressure tank are can be prevented from flowing back into the nozzle, and the nozzle is closed by the moist powder. never get blocked. In addition, this invention allows you to simply insert the tube into the existing nozzle. Compared to installing a new air release device, the above purpose can be achieved with The installation cost is low. Therefore, multiple nozzles can be installed in one pressure tank. There are economic benefits when there is a need to In addition, in the above embodiment, pneumatic transportation The air injection nozzle of this invention is attached to the pressure tank for powder and granular materials. Applicable to all containers (e.g. silos, hoppers, etc.) that store

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a pneumatic transport device.

FIG. 2 is a sectional view taken along the line A-A in FIG.

FIG. 3 is a sectional view of an air injection nozzle according to the present invention.

FIG. 4 is an outline drawing of a flexible tube.

[Explanation of symbols]

1 Pressure tank 2 Air injection nozzle 3 Air outlet 16 Nozzle body 17 Blind Hole 22 Flexible tube 23 slit

Claims (1)

[Scope of utility model registration request] [Claim 1] A nozzle having a blind hole 17 bored inside, an air outlet 3 communicating with the blind hole 17 formed at the tip side, and a base part provided with an attachment part to the inner wall surface of the pressure tank 1. Main body 16
and a flexible tube 22 inserted into the blind hole 17, and a slit 23 is provided along the axis at the intersection with the air outlet 3 at the tip of the tube 22. Features: Air injection nozzle for pressure tanks.