JPS5911274Y2 - Bend pipe for powder transfer pipe - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bent pipe for a powder transfer pipe such as a dust collection pipe.

When a powder or granule moves through a bend in a powder or granule transfer pipe, it hits the inner surface of the tube wall on the outside of the center line of curvature of the bend pipe that forms this bend, causing it to bend. In addition, this part will wear out and must be maintained in some way.

Therefore, conventionally, maintenance methods shown in FIGS. 1, 2, and 3 have been considered.

In other words, in the case of Fig. 1, the outer surface of the outer pipe wall 2A of the bend pipe 1 of the powder transfer pipe is covered with SS material 3 and attached by welding 4, and the doubling method is used. Side pipe wall 2
This is a bolt installation method in which wear-resistant cast iron 5 is attached to the inner surface of B with bolts 6, and in the case of Fig. 3, the outer tube wall 2C has a double tube 7 structure, and a wear-resistant cast iron 5 is filled in between. This is an abrasive castable filling method.

However, these have disadvantages in that the wear-resistant members are expensive and repair is not very easy.

The present invention solves the above-mentioned drawbacks, and proposes a bend pipe for powder and granular material transfer pipes that can reduce the wear caused by powder and granule material and that can be very easily maintained against wear. It is something.

Therefore, in the present invention, the outside of the center of curvature of the bent pipe is formed into an expanded part, and a wear-resistant plate that receives the inflowing powder or granules at right angles or almost right angles is placed in the expanded part of the bent pipe. A plurality of the plates are arranged so as to be slightly shifted along the bending direction, and cutouts are formed in both side plate portions of the expansion portion so that the wear-resistant plates can be inserted and removed laterally.

An embodiment of the present invention will be described below with reference to FIGS. 4 to 8.

Reference numeral 11 denotes a bent pipe for a powder transfer pipe, and its outer side with respect to the center line of its curvature is shaped into an expanded portion 12 having a rectangular cross section.

The inflatable portion 12 is composed of left and right side plate portions 12A, 12B and an outer plate portion 12C.

Deformable cylindrical portions 13A, 13B made of annular rib-like members protruding outward from the both side plate portions 12A, 12B are provided on the side plate portions 12A, 12B near the outer plate portion 12C.

Deformed cylinder portions 13A, 13 of the side plate portions 12A, 12B
In the part surrounded by B, there are a plurality of pairs of notches 14 facing each other.
is formed, and the lining set 15 can be inserted and removed through both notches 14 in each set, and both notches 1
4 makes it possible to support the lining set 15.

This lining set 15 consists of a wear-resistant root 16 (such as a rubber plate) and a support iron plate 17 that is attached to it from the back.
, a holding plate 18 which clamps the upper end of the wear-resistant plate 16 between the support iron plate 17, and a plurality of bolts and nuts 19 which integrate these plates 16, 17, and 18.

The lining set 15 is arranged such that the wear-resistant roots 16 face perpendicularly or almost perpendicularly to the powder flow direction A, and are further arranged in the front-back direction and the up-down direction, that is, along the bending direction of the bend pipe 11. By arranging a plurality of them so as to be slightly shifted from each other, it is possible to prevent the powder from colliding with the outer plate portion 12C.

The outer open openings of the deformable cylindrical parts 13A and 13B are connected to the cover 2O.
A, 20B, and this cover 20 A, 20
B can be attached to and detached from the deformable cylindrical portions 13A and 13B using bolts and nuts 21A and 21B.

In the above structure, the granular material that has flowed into the bend pipe 11 is
The liquid collides with each wear-resistant plate 16 at right angles, changes its direction, and flows out of the bend pipe 11.

At this time, since the expanded portion 12 is on the outer side with respect to the center line of curvature of the bend pipe 11, the side plate portion 12 of this expanded portion 12
There is no sliding contact between the powder and granules on A and 12B, and side wear can be avoided.

Since the wear-resistant roots 16 are in contact with the powder at right angles, there is less wear compared to sliding contact, and when wear occurs, either one of the bolts or nuts} 21 A, 21
It can be replaced by unscrewing B, removing the covers 20A and 20B, and then pulling it out in the lateral direction B and inserting it.

According to the present invention described above, the following effects can be expected.

That is, by forming the outer side of the center line of curvature into an expanded portion, it is possible to prevent the inflowing powder and granules from sliding against the side surfaces of the expanded portion and causing abrasion. Since the dust collides at right angles or almost right angles with the wear-resistant plate provided in the expansion section, mutual interference of dust occurs, in other words, the powder particles that bounce off the wear-resistant plate surface hit the powder particles that are about to collide, slowing down the particles. By making the most of the phenomenon of It can be used throughout.

Further, when the wear-resistant plate becomes worn, it is only necessary to pull it out to the side and insert a new wear-resistant plate from the side, making it possible to easily and quickly replace it.

[Brief explanation of drawings]

Figures 1 to 3 are cross-sectional views of bent pipes showing conventional examples, respectively;
4 to 8 show an embodiment of the present invention, FIG. 4 is a side view, FIG. 5 is a vertical side view, and FIG. 6 is an
7 is a sectional view taken along the Y-Y line, and FIG. 8 is a side view of the main parts. 11... Bend pipe, 12... Expansion part, 12A, 12
B... Side plate part, 12C... Outer plate part, 14... Notch, 15... Lining set, 16... Wear-resistant plate, 17... Support iron plate, 18... Holding plate, 20A
,20B...Cover

Claims (1)

[Scope of utility model registration request] The outer side of the bend pipe with respect to the center of curvature is shaped into an expanded part,
A plurality of wear-resistant plates that receive the inflowing powder or granular material at right angles or almost right angles are arranged in this expansion part, being slightly shifted along the bending direction of the bend pipe, and on both side plate parts of the expansion part. A bend pipe for a powder or granular material transfer pipe, characterized in that the wear-resistant plate is formed with a notch through which the wear-resistant plate can be laterally inserted and removed.