JP2005282622A - Ceramic hose body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ceramic hose body capable of preventing shortening of the service life due to wear even if the ceramic hose body is arranged along a piping passage having a bending part. <P>SOLUTION: The ceramic hose body 1 is constituted by connecting a first rubber hose 3 with a second rubber hose 5 via an elbow pipe 7. Each of the first rubber hose 3 and the second rubber hose 5 comprises an outer layer 5 made of rubber and a ceramic wear resistant layer 11 inside the outer layer 9. The elbow pipe 7 is made of alumina. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hose body used, for example, for air feeding differential carbon, and more particularly, to a ceramic hose body provided with a ceramic composite hose provided with a wear-resistant layer containing a ceramic body.

  When sending fine pulverized coal with fine air into a blast furnace burner with air, the inner surface of the supply channel or piping is rubbed by the pulverized coal, so the supply channel is likely to wear, so pulverized coal supply On the road, the rubber hose forming the supply path must be changed frequently. Therefore, it is necessary to make the rubber hose used for air transportation of pulverized coal excellent in wear resistance and to extend the life of the supply path, but the durability of the rubber hose is that the rubber hose contains a ceramic body. It can be improved by forming a wear layer (see, for example, Patent Document 1).

No. 04-36912

  However, even if a wear-resistant layer including a ceramic body is formed on the rubber hose in order to improve durability, the rubber hose is required to have basic performance such as flexibility. In such a manner, the wear-resistant layer containing the ceramic body cannot be provided. Therefore, the ceramic composite rubber hose contains a large amount of rubber material even in the wear-resistant layer itself containing the ceramic body. For example, when the hose is bent at a large angle to constitute a pulverized coal supply path, the fine powder passing therethrough is contained. Wear gradually progresses from the outside of the inner surface of the bent portion of the hose that is rubbed hard by charcoal, and the rubber hose needs to be replaced due to wear relatively early.

  Therefore, an object of the present invention is to provide a ceramic hose body that can prevent the shortening of the service life due to wear even if it is arranged along a pipeline having a bent portion.

  In order to achieve this object, a ceramic hose body of the present invention is a ceramic hose body using a ceramic composite hose provided with a wear-resistant layer containing a ceramic body, wherein the first ceramic composite hose and one end thereof are the first ones. A pipe member connected to one ceramic composite hose, and a second ceramic composite hose connected to the other end of the pipe member, wherein the pipe member is made of ceramic, for example, alumina. . The first ceramic composite hose and the second ceramic composite hose are configured to have sufficient flexibility required as a hose. When piping a ceramic hose body, when a bent portion or a bent portion that promotes wear of the ceramic composite hose is generated, a pipe member is disposed at the bent portion. Therefore, the pipe member is usually formed to be curved so as to correspond to the bent portion. The ceramic hose body of the present invention can be used, for example, for powder or fluid transfer.

  The pipe body is formed so as to be bent at, for example, 90 degrees (the angle between one end and the other end is 90 degrees), or to be bent at more than 90 degrees and not more than 135 degrees. Therefore, depending on the type of the transfer body, the outer surface of the inner surface of the pipe member is rubbed violently by the transfer body. However, the pipe member is made of ceramic and does not easily wear even when rubbed against the transfer body.

  The first ceramic composite hose includes a wear-resistant layer including a ceramic body as an inner layer, and a rubber elastic layer as an outer layer, for example, a layer disposed on the outside of the ceramic body. And a rubber elastic layer as an outer layer, for example, a layer disposed outside the ceramic body. By configuring the ceramic composite hose in this way, it becomes possible to prevent the inner layer from being worn and effectively protect the outer layer, so that a hose or hose body having a long life can be obtained. Vulcanized rubber or thermoplastic elastomer can be used for the material of the rubber elastic layer and the base material (rubber elastic material portion) of the wear resistant layer. In the first ceramic composite hose, the end of the rubber elastic layer extends longer than the wear resistant layer, and in the second ceramic composite hose, the end of the rubber elastic layer extends longer than the wear resistant layer. Is a good idea. Then, one end part and the other end part of the pipe member are respectively inserted into the end parts of the rubber elastic layers of the first ceramic composite hose and the second ceramic composite hose (for example, fitted), or The ends of the rubber elastic layers of the first ceramic composite hose and the second ceramic composite hose are covered (for example, fitted) to the one end and the other end, respectively, and the pipe member, the first ceramic composite hose, and the second ceramic composite hose Since the hose can be connected, the wear-resistant layer that is hardened by including the ceramic body is configured not to intervene at the connection portion between the pipe member, the first ceramic composite hose, and the second ceramic composite hose. It becomes possible. Therefore, the pipe member and the first ceramic composite hose and the second ceramic composite hose can be connected in a strong retaining state while ensuring sufficient sealing performance.

  One end (annular one end surface) of the pipe member and the end (annular end surface) of the wear-resistant layer of the first ceramic composite hose are brought into contact with or abutted, and the end of the wear-resistant layer of the first ceramic composite hose is connected to the pipe. It is formed so as to have an inner diameter equal to or substantially equal to one end of the member, and the other end of the pipe member (annular other end surface) and the end of the wear-resistant layer of the second ceramic composite hose (annular end surface) If the end of the wear-resistant layer of the second ceramic composite hose is formed so as to have the same or almost the same inner diameter as the other end of the pipe member, the transfer body can smoothly connect the connection portion. Therefore, it is possible to effectively prevent leakage of the transfer body from the connection portion between the pipe member, the first ceramic composite hose and the second ceramic composite hose.

  As described above, the ceramic hose body of the present invention as a whole has sufficient flexibility, excellent wear resistance, and extremely long life.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view of a ceramic hose body according to the present invention used in a blast furnace for transferring pulverized coal, FIG. 2 is a perspective view showing a connecting portion of a first rubber hose and an elbow pipe, and FIG. It is sectional drawing which shows the laminated structure of 1 rubber hose and 2nd rubber hose.

  The ceramic hose body 1 is configured by connecting a first rubber hose 3 (first ceramic composite hose) and a second rubber hose 5 (second ceramic composite hose) with an elbow pipe 7 (pipe member) made of alumina, for example. Each of the first rubber hose 3 and the second rubber hose 5 has a laminated structure having an outer layer 9 made of a rubber material excellent in weather resistance, for example, ethylene-propylene-diene rubber (EPDM), and a ceramic wear-resistant layer 11 as an inner layer. Each of the outer layers 9 is provided with a chemical fiber reinforcing layer 13 embedded therein. The ceramic wear-resistant layer 11 is formed by embedding a ceramic wear-resistant member 19 formed by connecting alumina balls 17 in a bead shape using a fine thread in a rubber material having excellent wear resistance, for example, a base material 15 made of EPDM. The ceramic wear-resistant member 19 is wrapped in a base material 15 in a spirally wound state.

  At the end of the first rubber hose 3 (the end on the connection side with the elbow pipe 7), the outer layer 9 extends with the reinforcing layer 13 longer than the ceramic wear-resistant layer 11, and the ceramic wear-resistant layer 11 of the outer layer 9. The projecting length from (the length of the end of the outer layer 9) is set to 70 mm to 80 mm. Also, the outer layer 9 extends with the reinforcing layer 13 longer than the ceramic wear-resistant layer 11 at the end of the second rubber hose 5 (the end on the connection side with the elbow pipe 7). The protruding length from the layer 11 (the length of the end of the outer layer 9) is also set to 70 mm to 80 mm.

  The first rubber hose 3 is formed by fitting the entire outer layer 9 (the entire end portion of the outer layer 9) that extends longer than the ceramic wear-resistant layer 11 onto the outer periphery of the end portion 21 of the elbow tube 7. 7 is connected. Two fastening bands 23, 23 are arranged on the outer periphery of the end portion of the outer layer 9 that covers the one end portion 21 of the elbow tube 7, and the elbow tube 7 does not pass through the end portion of the outer layer 9. It is fastened and fixed. The outer layer 9 of the first rubber hose 3 is fitted to the elbow pipe 7 so that the end (annular end face) of the ceramic wear-resistant layer 11 of the first rubber hose 3 is in contact with one end (annular end face) of the elbow pipe 7. It is done in contact. Here, since the thickness of the ceramic wear-resistant layer 11 is set to be substantially the same as the thickness of the elbow pipe 7, one end of the elbow pipe 7 and the end of the ceramic wear-resistant layer 11 are in contact with each other without causing a step. Will be doing.

  Further, the second rubber hose 5 is also fitted by fitting the entire outer layer 9 (the entire end of the outer layer 9) extending longer than the ceramic wear-resistant layer 11 on the outer periphery of the other end 25 of the elbow pipe 7. The elbow pipe 7 is connected. On the outer periphery of the end of the outer layer 9 that covers the other end 25 of the elbow 7, two fastening bands 23 and 23 are also arranged so as not to pass through the end of the outer layer 9. The elbow tube 7 is fastened and fixed. In fitting the outer layer 9 of the second rubber hose 5 to the elbow pipe 7, the end (annular end face) of the ceramic wear-resistant layer 11 of the second rubber hose 5 is in contact with the other end (annular other end face) of the elbow pipe 7. It is performed so as to abut. Here, the thickness of the ceramic wear-resistant layer 11 is set to be almost the same as the thickness of the elbow pipe 7, so that no step is generated between the other end of the elbow pipe 7 and the end of the ceramic wear-resistant layer 11. It is in contact in the state.

  FIG. 4 is a view showing a state when the first rubber hose 3 is connected to the elbow pipe 7, and is a view for explaining a dimensional relationship between the elbow pipe 7 and the first rubber hose 3.

  The outer diameter OD1 of the one end portion 21 of the elbow pipe 7 is set to 61.8 mm, and the inner diameter ID1 is set to 50.8 mm. On the other hand, the outer diameter OD2 of the first rubber hose 3 is set to 71 mm, and the inner diameter ID2 is set to 50.8 mm. Further, the inner diameter ID3 of the end of the outer layer 9 protruding from the outer layer 9 or the ceramic wear-resistant layer 11 is 60.8 mm which is smaller by 1 mm than the outer diameter OD1 of the one end 21 of the elbow pipe 7. Therefore, when the end portion of the outer layer 9 is fitted on the outer periphery of the one end portion 21 of the elbow tube 7, the elbow tube 7 is slightly tightened.

  The dimensional relationship between the other end portion 25 of the elbow pipe 7 and the second rubber hose 5 is set to be equal to the dimensional relationship between the one end portion 21 of the elbow pipe 7 and the first rubber hose 3. Further, when the thickness of the elbow pipe 7 is changed, the thickness of the ceramic wear-resistant layer 11 is such that one end and the other end of the elbow pipe 7 are in contact with the end of the ceramic wear-resistant layer 11 without causing a step. Is preferably changed in accordance with the thickness of the elbow pipe 7.

  Here, the inner diameter (ID2) of the first rubber hose 3 or the second rubber hose 5 is set equal to the inner diameter (ID1) of the one end 21 or the other end 25 of the elbow pipe 7, and the first rubber hose 3 or the second rubber hose 5 The thickness of the ceramic wear-resistant layer 11 (inner layer) of the rubber hose 5 or the thickness or width of the end face of the ceramic wear-resistant layer 11 is set to one end 21 or the other end 25 of the elbow pipe 7 or one end face of the elbow pipe 7 or It can be set slightly smaller (substantially the same) than the other end surface. Alternatively, the inner diameter (ID2) of the first rubber hose 3 or the second rubber hose 5 is set equal to the inner diameter (ID1) of the one end 21 or the other end 25 of the elbow pipe 7, and the first rubber hose 3 or the second rubber hose 5 is set. The inner diameter (ID3) of the end of the outer layer 9 can be set slightly smaller (substantially the same) than the outer diameter (OD1) of the one end 21 or the other end 25 of the elbow pipe 7.

  FIG. 5 is a perspective view of the fastening band 23.

  The fastening band 23 has a buckle 29 having a through portion 27 and a band main body 31 having one end fixed to the buckle 29 and the other end passing through the through portion 27 twice to form a double winding. In addition, the band main body 31 can be reduced in diameter by pulling the other end of the band main body 31. Then, the other end portion of the band main body 31 is folded back at the position of the through portion 27, and the folded portion of the band main body 31 is pressed by folding the fixing pieces 33, 33 provided on the buckle 29. Then, an excessive portion of the folded portion of the band main body 31 is cut to complete the tightening operation by the tightening band 23 (see also FIG. 2). Therefore, in the expanded state shown in FIG. 5, the fastening band 23 is fitted on the outer periphery of the first rubber hose 3 (second rubber hose 5), and the first rubber hose 3 (second rubber hose 5) is connected to the elbow pipe 7. Later, a tightening operation using the tightening band 23 is performed, and the end of the outer layer 9 of the first rubber hose 3 (second rubber hose 5) is tightened to one end 21 (the other end 25) of the elbow pipe 7.

  In addition, in order to ensure the firmer connection state between the elbow pipe 7 and the 1st rubber hose 3 and the 2nd rubber hose 5, as shown in FIG. You may form in a nipple shape.

  The ceramic hose body of the present invention can ensure a long life even when used, for example, for powder transfer.

It is sectional drawing of the ceramic hose body which concerns on this invention used in a blast furnace in order to transfer pulverized coal. It is a perspective view for showing the connection part of the 1st rubber hose and an elbow pipe. It is sectional drawing which shows the laminated structure of a 1st rubber hose and a 2nd rubber hose. It is a figure which shows the state when connecting a 1st rubber hose to an elbow pipe, and is a figure for demonstrating the dimensional relationship of an elbow pipe and a 1st rubber hose. It is a perspective view of a fastening band. It is a figure which shows another structure of an elbow pipe.

Explanation of symbols

1 Ceramic hose body 3 1st rubber hose (1st ceramic composite hose)
5 Second rubber hose (second ceramic composite hose)
7 Elbow pipe (pipe member)
21 one end 25 other end

Claims (5)

A ceramic hose body using a ceramic composite hose provided with a wear-resistant layer containing a ceramic body,
A first ceramic composite hose, a pipe member having one end connected to the first ceramic composite hose, and a second ceramic composite hose connected to the other end of the pipe member,
A ceramic hose body, wherein the pipe member is made of ceramic. The ceramic hose body according to claim 1, wherein the pipe member is curved. The first ceramic composite hose has a wear-resistant layer containing a ceramic body as an inner layer and a rubber elastic layer as an outer layer,
3. The ceramic hose body according to claim 1, wherein the second ceramic composite hose also includes a wear-resistant layer including a ceramic body as an inner layer and a rubber elastic layer as an outer layer. In the first ceramic composite hose, the end of the rubber elastic layer extends longer than the wear resistant layer, and in the second ceramic composite hose, the end of the rubber elastic layer extends longer than the wear resistant layer. And
One end of the pipe member is connected to the first ceramic composite hose by being inserted into an end of the rubber elastic layer of the first ceramic composite hose.
The second ceramic composite hose is connected to the other end of the pipe member by covering the other end of the pipe member with an end of the rubber elastic layer. Ceramic hose body. One end of the pipe member and the end of the wear-resistant layer of the first ceramic composite hose are in contact with or abut, and the other end of the pipe member and the end of the wear-resistant layer of the second ceramic composite hose are also in contact with or contacted. Abut,
The end portion of the wear-resistant layer of the first ceramic composite hose has an inner diameter equal to or substantially equal to one end portion of the pipe member,
5. The ceramic hose body according to claim 4, wherein an end portion of the wear-resistant layer of the second ceramic composite hose has an inner diameter equal to or substantially equal to the other end portion of the pipe member.

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