JPS58113030A - Suction nozzle - Google Patents

Abstract

PURPOSE:To improve the efficiency of suction in a suction nozzle of a vacuum suction transport apparatus by applying a turning movement to the secondary air flowing in the inner cylinder of a suction nozzle by a plurality of inclined plates so as to decrease a pressure loss caused by collision of the secondary air flow. CONSTITUTION:A plurality of inclined plates 8 are disposed at required intervals on the inner peripheral portion of the forward end portion 6' of a nozzle cylinder 6 tangentially along the inner wall portion of a nozzle inner cylinder 5, whereby a turning movement is applied to the secondary air flowing in the nozzle inner cylinder 5. When vacuum suction is conducted by a suction blower, the secondary air is flowed between the nozzle inner cylinder 5 and the nozzle outer cylinder 6 through a space between respective forward end portions 7, 6' in the nozzle inner cylinder 5, and when the secondary air passes between respective inclined plates 8, a turning movement is applied to the secondary air. This results in that the secondary air smoothly flows in the nozzle inner cylinder 5 so as to decrease a pressure loss, and a vacuum suction transport for granular powder can be conducted efficiently.

Description

[Detailed Description of the Invention] The present invention is a vacuum suction transport device for suction transporting granular materials such as grains, in which swirling flow is forcibly generated within a suction nozzle to improve suction acceleration efficiency. Regarding suction nozzles.

Conventional vacuum suction conveyor (pneumatic conveyor)
As shown in Figs. 1 and 2, the powder and granules sucked together with air by the suction nozzle (1) are separated into air and granules by the separator (2), and then passed through the bag filter (3). The fine powder and granules were separated and the air was sucked into a suction blower (4). The suction nozzle (1) used in such a device includes a suction nozzle inner cylinder (5) and a secondary air inflow nozzle outer cylinder (
6), and for introducing the secondary air that has flowed into the nozzle outer cylinder (6) into the suction nozzle inner cylinder (5),
The tip (6) of the nozzle outer cylinder (6) is curved inward to create a gap S between it and the tip (7) of the suction nozzle inner cylinder (5).
, and the gap S can be adjusted by raising and lowering the nozzle outer cylinder (6). In the suction nozzle (1), the secondary air flows from the entire circumference of the gap S to the suction nozzle. It flows toward the center of the inner cylinder (5), where it collides violently, then turns upwards by 90 degrees and is sucked in, so the pressure loss due to the collision is large and the vacuum pressure that should be sucked is wasted. However, it had some problems.

The present invention was made to solve these problems,
In a suction nozzle comprising a secondary air inflow nozzle outer cylinder on the outer periphery of the tip of the suction nozzle inner cylinder, a plurality of inclined plates are installed at appropriate intervals on the inner periphery of the tip of the nozzle outer cylinder. The suction nozzle is installed in a direction inclined with respect to the direction, and is configured to generate a swirling flow for the secondary air passing between the various types of swash plates and flowing into the suction nozzle inner cylinder by the various types of swash plates. The present invention relates to a suction nozzle characterized by:

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

In the suction nozzle shown in FIGS. 1 and 2, the sixth
As shown in the figure and Fig. 4, the tip of the nozzle outer cylinder (6) (
A plurality of slanted plates (8) are installed at required intervals on the inner circumference of 6) in a tangential direction along the inner wall of the suction nozzle inner cylinder (5), and each type of slanted plate (8) allows the inside of the suction nozzle to be A swirling motion is forcibly applied to the secondary air flowing into the cylinder (5).
The structure is configured to prevent air collisions and smooth inflow.

Because of this configuration, when the suction blower (4) (see Fig. 1) is driven to perform vacuum suction, the suction nozzle inner cylinder (5)
) and the nozzle outer cylinder (6), the secondary air that flows into the suction nozzle inner cylinder (5) through the gap S between each tip (force 6) Tip part (
A plurality of inclined plates (8) are arranged on the inner periphery of the suction nozzle inner cylinder (5).
), so when the secondary air passes between each inclined plate (8) (81), it is forcibly given a swirling motion.Therefore, the secondary air flows in smoothly. This swirling flow causes the powder and granules in the lower part of the suction nozzle inner cylinder (5) to be stirred and floated while being transferred, allowing efficient suction transport with less acceleration resistance. Furthermore, as a result, the suction blower (4) can be made smaller.

5 and 6 show other embodiments of the present invention,
In the suction nozzle shown in FIGS. 3 and 4, a ring-shaped air main pipe 0■ connected to the air fan (9) is attached to the upper end of the nozzle outer cylinder (6), and a plurality of air pipes are connected to the air fan (9) from the main pipe OI. Take out the air injection pipe 0υ and guide the tip nozzle part 0υ of each injection pipe (6) along the nozzle outer surface area (6) outer surface area or inner surface) to the tip of the nozzle outer cylinder (6). The inclined plate (
8) (8) By the air injected at the position Iv] and injected from the nozzle part (11) of each injection pipe αυ,
This is designed to give a stronger swirling motion to the secondary air flowing into the suction nozzle inner cylinder (5).

Each of the nozzle parts a6 is arranged so that the plane jet direction of air is inclined and tangential to the inner wall of the suction nozzle inner cylinder (5) as in (8), and 7'-, 4) side surface. The angle is determined so that the target jet direction is slightly downward toward the powder and granular material at the bottom of the suction nozzle inner cylinder (5).

In the case of this method, the air injected from the nozzle SU of each injection pipe (11) can form a strong swirling flow of the secondary air flowing into the suction nozzle # (21), and also Because it can be dug up and made to float,
It becomes easier to perform suction using the suction nozzle inner cylinder (5), and more efficient suction vacuum transportation is possible.

In the above embodiment, the side angle of the nozzle part aυ was set downward, but it may also be set horizontally or upwardly. ), but it may be in any direction away from the center of the suction nozzle inner cylinder (5) (a direction having an inclination angle with respect to the radial direction) so as to generate a swirling flow. The plate (8) may be not only a flat plate but also a twisted or curved plate, and it goes without saying that various changes can be made without departing from the gist of the invention.

As described above, according to the present invention, a plurality of inclined plates are attached to the inner periphery of the secondary air introduction part at the tip of the nozzle outer cylinder so as to be inclined with respect to the radial direction of the suction nozzle inner cylinder. It is possible to give swirling motion to the secondary air flowing into the cylinder, reduce pressure loss due to collision of the secondary air flow, and make it easier to suction powder and granules. By positioning the tip nozzle,
The swirling motion can be made more powerful by the air from the injection pipe, and the powder and granules can be more easily drawn in, thereby achieving excellent effects such as being able to suction and vacuum transport more efficiently.

[Brief explanation of drawings]

Figure 1 is a cutaway side view of a conventional suction nozzle, and Figure 2 is a side view of a conventional suction nozzle.
Fig. 3 is a cutaway side view of the suction nozzle of the present invention, Fig. 4 is a view taken from Fig. 3 in the direction of Fig. 3, and Fig. 5 shows another embodiment of the present invention. Cutaway side view, Figure 6 is M- in Figure 5.
It is a view taken along arrow W. (5)...Suction nozzle inner cylinder, (6)...Nozzle outer cylinder, (ml...tip part, (8)...inclined plate, (9)...
...Air fan, αυ...Air injection pipe, al)...
Nozzle part. Patent applicant Ishikawajima Harima Heavy Industries Co., Ltd. Patent applicant agent Patent applicant agent

Claims (1)

[Scope of Claims] 1) A suction nozzle comprising a secondary air inflow nozzle outer cylinder on the outer periphery of the tip of the suction nozzle inner cylinder, in which a plurality of inclined plates are arranged at appropriate intervals on the inner periphery of the tip of the nozzle outer cylinder. of the suction nozzle inner cylinder. The suction nozzle is installed in a direction inclined with respect to the radial direction, and each inclined plate is configured to generate a swirling flow for the secondary air passing between the respective inclined plates and flowing into the inner cylinder of the suction nozzle. Features a suction nozzle. 2) In a suction nozzle comprising a secondary air inflow nozzle outer cylinder on the outer periphery of the tip of the g&pull nozzle inner cylinder, a plurality of inclined plates are installed inside the suction nozzle at appropriate interval positions on the inner periphery of the tip of the nozzle outer cylinder. A plurality of air injection pipes are installed along the nozzle outer cylinder and are attached in a direction inclined with respect to the radial direction of the cylinder and further connected to a pneumatic source, and the tip nozzle portion of each injection pipe is arranged in a direction inclined to the radial direction of the cylinder. The suction nozzle is positioned at the distal end side of the inner cylinder in the same direction as the inclined plate at the position between the plates, and the air ejected from each injection pipe nozzle portion and the inclined plates pass between the inclined plates to form the suction nozzle. A suction nozzle characterized in that it is configured to generate a swirling flow in secondary air flowing into an inner cylinder.