JP2003054744A - Powder transport pipe filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter removing lump material in cement powder during transporting by a transport pipe. SOLUTION: A filter 10 is installed in a joint 20 between a powder discharge hose 51 and silo piping 52. The filter 10 is formed into a lattice shape preventing passing of the lump material mixed in power passing through the joint 20. The lattice-shaped portion of the filter 10 is curved to the upstream of a stream of the powder from a peripheral portion of the filter. Iron rods are assembled into a lattice shape and welded to the lattice-shaped portion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for a powder transport pipe, which is used in a vehicle for transporting powder of cement or the like, and which prevents passage of lumps in the powder of cement or the like.

[0002]

2. Description of the Related Art Conventionally, cement powder transportation vehicles have been used. When putting the cement powder from the cement powder transport vehicle into the cement storage, etc., connect the discharge hose normally connected to the cement tank of the cement powder transport vehicle to the inlet pipe of the cement storage, etc. The cement powder in the cement tank is sent to the cement storage or the like by air pressure.

[0003]

However, according to the conventional method, foreign substances mixed in the cement tank of the cement powder transportation vehicle, and lumps such as cement lumps are generated in the discharge hose and cement storage of the cement tank. There was a problem that it would be sent to the cement storage, etc. through the inlet side pipe. Further, this problem is not limited to cement powder, but is a problem that occurs in various powders as well. The present invention has been made in view of such a point, and its object is a powder that prevents passage of a lump of a mixture of powder such as cement while being transported by a transport pipe. The object is to provide a filter for a body transport tube.

[0004]

In order to solve the above problems, the first invention of the present application is as described in claim 1. According to the first aspect of the present invention, a powder transport pipe filter installed in a powder transport pipe (including a doorway of a storage such as a tank, a pipe, a hose, and a joint) is provided in the powder passing through the transport pipe. Since it is formed in a lattice shape that prevents the passage of lumps (for example, cement lumps, foreign matter such as bolts) that are mixed in, the passage of lumps that are mixed in the powder is surely blocked. be able to.

Further, the second invention is as described in claim 2. According to the second aspect of the invention, in addition to the function of the first aspect of the invention, since the lattice-shaped portion of the filter is curved to the upstream side of the flow of the powder rather than the peripheral portion of the filter, cement or the like to which the filter is transported It becomes easier to withstand the pressure of the powder flow.

Further, a third invention is as described in claim 3. According to the third aspect of the invention, in addition to the action of the first or second aspect of the invention, the lattice-shaped portion of the filter can be easily configured by combining and welding the iron rods in the lattice shape.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a joint provided with a filter according to an embodiment of the present invention. In FIG. 1, the joint 20 includes an upstream side portion 30 and a downstream side portion 40. The upstream portion 30 includes the filter 10 described below. A discharge hose 51 whose upstream side portion 30 will be described later.
, And the downstream portion 40 is connected to a pipe 52 of a silo 63 (see FIG. 6) described later.

The upstream portion 30 is provided with a ring-shaped member 31, a lever 32, a first hook 33 and a second hook 34 on the outer side thereof. Guide 34 of the second hook 34
a is attached to the outside of the upstream portion 30. The ring-shaped member 31 is arranged so as to be free to move outside the upstream portion 30, as will be described later. The lever 32 is supported by a fulcrum 32a provided on the ring-shaped member 31 and is rotatable in the direction of an arrow 32b. The first hook 33 is rotatably supported by a fulcrum 33a of the lever 32.
The second hook 34 is rotatably connected to the ring-shaped member 31. The safety pin 35 is inserted through the through hole 33b of the first hook 33 and the through hole (not shown) of the lever 32. When the safety pin 35 is removed and the lever 32 is rotated, the first and second hooks 33 and 34 can be engaged with the locking portion 41 of the downstream portion 40.

FIG. 2 is a perspective view showing a connection state of the joint 20. In FIG. 2, the upstream side portion 30 and the downstream side portion 40 of the joint 20 are connected. Then, the first and second hooks 33 and 34 (see FIG. 1) are engaged with the locking portion 41 of the downstream portion 40. In this state, the cement powder flows in the joint 20 in the direction of arrow 21.

FIG. 3 is a sectional view taken along line III-III in FIG. Figure 3
In, the ring-shaped packing 36 supports the downstream side of the peripheral portion 11 of the filter 10. The packing 36 is made of rubber. In this case, first, the filter 10 is attached to the upstream portion 3
0, and then the packing 36 is fitted in the upstream portion 30 on the downstream side of the filter 10. By attaching and detaching the packing 36 to and from the upstream portion 30, the filter 10 can be attached and detached to and from the upstream portion 30. In addition, the protrusions 31 a and 31 b on the inner side of the ring-shaped member 31 are arranged on the upstream side portion 30.
The ring-shaped member 31 is engaged with the substantially U-shaped engaging portions 31c and 31d on the outer surface thereof.
In this range, the upstream side portion 30 can move in the axial direction (the direction of the arrow 21 and the direction opposite to the arrow 21) and the circumferential direction as described above (see paragraph 0008). The pins 31ca and 31da are respectively engaged with the engaging portions 31c and 31d.
It is attached so as to close the U-shaped opening.

FIG. 4 shows an enlarged plan view of the filter 10. In FIG. 4, the filter 10 includes a peripheral portion 11 and a lattice portion 12. The peripheral portion 11 has a ring shape and is formed so as to surround the periphery of the lattice-shaped portion 12. The filter 10 is made of iron, and the peripheral portion 11 and the lattice portion 12 are welded. The grid portion 12 is formed by combining and welding five illustrated vertical bar portions 14 and five illustrated horizontal bar portions 15. By adjusting the size of the lattice by the illustrated vertical bar portion 14 and the illustrated horizontal bar portion 15, the lower limit of the size of the lumps (eg, cement lumps, foreign matters such as bolts) that the filter 10 blocks is determined. be able to.

FIG. 5 shows a VV cross section of FIG. In FIG. 5, the grid portion 12 is located upstream of the peripheral portion 11 (arrow 2).
It is provided at a position slightly offset in the direction opposite to 1). Therefore, the pressure of the cement powder flowing in the direction of arrow 21 can be resisted.

FIG. 6 shows the joint 20 in use. Figure 6
In, the joint 20 connects the discharge hose 51 and the pipe 52 as described above. A discharge hose 51 is connected to a cement tank 62 of a cement powder transportation vehicle 61. The inside of the cement tank 62 is pressurized with compressed air, and the cement powder in the cement tank 62 is pushed out into the discharge hose 51 by the pressure of this compressed air.
The pipe 52 is connected to the silo 63. Therefore, the cement powder transport vehicle 61 to the discharge hose 51, the joint 20
Then, the cement powder is sent to the silo 63 via the pipe 52. The silo 63 is a kind of cement storage,
It is installed on the ground 64. In addition, the filter 10
When the agglomerates are collected in the above, the agglomerates accumulated in the filter 10 can be removed by removing the filter 10 as described above (paragraphs 0010 and 00).
11).

In the above embodiment, cement powder is shown, but the present invention is not limited to this, and the present invention can be applied to powder such as coal ash and slag powder. Further, the shape of the filter 10 is not limited to that shown in the drawing, and may gradually curve toward the upstream side from the peripheral portion 11 of the filter 10 to the central portion 13 of the lattice-shaped portion 12. For example, the central portion 13 of the grid-like portion 12 may be curved upstream from the drawing, and the grid-like portion 12 may be curved like a parabolic antenna. By doing so, the durability of the lattice portion 12 against the flow of the cement powder in the direction of the arrow 21 is further increased. Further, the numbers of the illustrated vertical bar portions 14 and the illustrated horizontal bar portions 15 are not limited to those illustrated and may be arbitrary.

[0015]

According to the first aspect of the present invention, the powder transport pipe filter installed in the powder transport pipe passes through the lumps mixed in the powder passing through the transport pipe. Since it is formed in a lattice shape for preventing the passage, it is possible to reliably prevent passage of the lumps mixed in the powder. Therefore, for example, when the cement powder is sent from the cement tank of the cement transport vehicle to the cement storage or the like through the transport pipe, the powder transport pipe filter according to the first invention of the present application can be used to It is possible to prevent lumps mixed therein from being sent to a cement storage or the like.

Further, according to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the grid portion of the powder transport pipe filter is located upstream of the periphery of the powder transport pipe filter in the powder flow. The curved shape makes it easier for the powder transport pipe filter to withstand the pressure of the flow of powder such as cement that is transported. Therefore, the strength of the powder transport pipe filter can be made sufficient.

Further, according to the third invention, in addition to the effect of the first or second invention, the grid-shaped portion can be easily constructed by combining and welding the iron rods in the grid shape. Further, the strength of the powder transport pipe filter can be further improved by the grid of iron bars.

[Brief description of drawings]

FIG. 1 is a perspective view showing a joint including a filter according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a connected state of the joint of FIG.

FIG. 3 is a sectional view showing a section taken along line III-III in FIG.

FIG. 4 is an enlarged partial view showing a plane of the filter of FIG.

5 is a cross-sectional view showing a VV cross section of FIG.

6 is an explanatory view showing a usage state of the joint of FIG. 1. FIG.

[Explanation of symbols]

10 filters 11 Filter periphery 12 Lattice part of filter 14 Filter vertical bar 15 Horizontal bar of filter shown 20 joints 51 Tank discharge hose (transport pipe) 52 Silo piping (transportation pipe)

Claims (3)

[Claims] 1. A powder-formed powder which is installed in a powder-transporting pipe and is formed in a lattice shape that prevents passage of lumps mixed in the powder passing through the transporting pipe. Filters for transportation pipes. 2. The powder transport pipe filter according to claim 1, wherein the lattice-shaped portion of the filter is curved more upstream than the peripheral portion of the filter in the flow of the powder. A filter for powder transportation pipes. 3. The powder transport pipe filter according to claim 1 or 2, wherein the iron rods are combined in a grid shape and welded together.