JPH04132296U - ceramic lined tube - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent chipping of the end portion 1b of the ceramic plate 1 in the ceramic lining pipe P and prevent wear. [Structure] In a ceramic lined pipe P in which a ceramic plate 1 is arranged on the inner surface of a tube member 2, the ceramic plate 1
The end portion 1b is curved or chamfered.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a ceramic lined pipe used for transporting highly corrosive and abrasive fluids. It is related to.

0002

[Conventional technology]

Pipes used for pneumatic transportation of ash, sand, etc., and transportation of coke are made of metal. Because they are subject to severe wear, they are made with a tile-like ceramic plate lining the inner surface. Mick-lined tubes were used.

0003 For example, as shown in the partial cross-sectional view of FIG. 4(b), the ceramic lining pipe P' is A ceramic plate 10 is arranged without any gap on the inner surface of a tube member 2 made of rubber or metal. The flat surface 10a of the ceramic plate 10 is in contact with the transported object. Therefore, the wear resistance was improved. Manufacturing this ceramic lined pipe P' When placing the ceramic plate 10 on the inner surface of the cylindrical tube member 2, it is difficult. Therefore, as shown in FIG. 4(a), the tube member 2 is formed into a flat plate shape in advance. Then, the ceramic plates 10 are placed on the surface by gluing or embedding at a slight interval. After that, the tube member 2 is rolled up and the ends are joined to form a cylindrical shape. It was commonly used.

0004 This ceramic plate 10 is a square or hexagonal plate made of alumina, and is It has a flat surface 10a that comes into contact with an object, and the end portion 10b has an edge or a thread chamfered state. was. Further, a ceramic spherical body is provided instead of the ceramic plate 10. Ceramic lined pipes were also available, but spherical pipes created too many gaps and were not completed. Since it cannot be lined completely, the ceramic plate 10 as described above is widely used. there was.

[0005]

[Problem that the idea aims to solve] However, the conventional ceramic lining pipe P' as described above has the following characteristics as shown in FIG. As shown, each ceramic plate 10 is connected to the adjacent ceramic plate 10 by an edge-like end 10b. I was starting to come into contact with him. Therefore, the manufacturing process of ceramic lining pipe P' , when rolling up the tube member 2 on which the ceramic plate 10 is arranged, the ceramic plate 1 The ends 10b of 0 collided with each other and chipping was likely to occur. Also, edge-like ends 10b is on the same plane as the flat surface 10a, so there is no wear on the flat surface 10a during use. Accordingly, the end portion 10b was easily worn.

[0006] In either case, a gap is created between the adjacent ceramic plates 10, 10, Transported items may get stuck in this gap and get mixed in with other items when they are transported, or the pipe member 2 There was a risk that the gap portion would wear out and a hole would form.

[0007]

[Means to solve the problem]

In view of the above, the present invention is based on the circular shape of the ceramic plate constituting the ceramic lined pipe. The edges in the circumferential direction are curved or chamfered, and the edges are in contact with the adjacent ceramic plate. It was designed to do so.

[0008]

【Example】

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

[0009] As shown in a partial cross section in Fig. 1, the ceramic lined pipe P of the present invention has multiple sections. A lamic plate 1 is arranged on the inner surface of a pipe member 2 made of rubber, metal, etc. be. As shown in FIG. 2, the ceramic plate 1 has a flat surface that comes into contact with the transported object. 1a, and the circumferential end 1b of the ceramic lining pipe P has a radius of curvature R. It has a curved surface shape, and the adjacent ceramic plates 1, 1 are in contact with each other at this end 1b. The sea urchin is turning.

0010 In this way, the ceramic lining pipe P of the present invention has adjacent ceramic plates 1, 1 are in contact with each other at the curved end 1b, so the tube member 2 can be rolled up. When manufacturing the ceramic lining pipe P, even if the ceramic plates 1 collide with each other, it will not be necessary. Less likely to cause injury. Also, the positions where the ends 1b touch each other are lower than the flat surface 1a. Therefore, even if the flat surface 1a wears out during use, the contact portion of the end 1b is unlikely to wear out. It is difficult to form gaps even after long-term use.

[0011] Moreover, the end portion 1b of the ceramic plate 1 shown in FIG. 2 is curved with a large radius of curvature R. In addition, as shown in FIG. 3(a), only the ridge of the end 1b is The shape of the curved surface with a small radius of curvature R, or the shape of the end 1b as shown in FIG. 3(b). The edge portion may be chamfered with a width C. In addition, FIGS. 2 and 3(a)(b) ), if the ceramic plate 1 has a symmetrical shape on the front and back, the tube When placing the ceramic plate 1 on the member 2, there is no need to distinguish between the front and back sides, making it efficient. can be manufactured.

0012 Further, the ceramic plate 1 in the above embodiment is made of alumina, zirconia, silicon carbide. , various ceramic materials such as silicon nitride can be used, and the tube member 2 can be made of rubber, etc. Alternatively, metals such as iron are used. The joining between the tube member 2 and the ceramic plate 1 is then This can be done by attaching or embedding.

Experimental Example 1 Next, as an example of the present invention, a ceramic lining tube P was prototyped using the ceramic plate 1 shown in FIG. 2, and a conventional ceramic lining tube P as a comparative example shown in FIG. Use tests were conducted with P'. The tube member 2 was made of rubber and had an outer diameter of 320 mm and an inner diameter of 300 mm, and the ceramic plates 1 and 10 were made of alumina ceramic and had a circumferential length of 20 mm, a longitudinal length of 20 mm, and a thickness of 5 mm. Further, the radius of curvature R of the end portion 1b of the ceramic plate 1 according to the embodiment of the present invention was set to 1.5 mm.

[0014] Regarding these two types of ceramic lined pipes P and P', first, Check the presence or absence of chips on Mick plates 1 and 10, and then use them to transport coke under the same conditions. After 60 days, it was observed whether a gap was formed between the ceramic plates 1 and 1. The results are shown in Table 1.

[0015] As shown in Table 1, the conventional product suffers from some chipping during manufacturing, and after 60 days, There were gaps between the lamic plates 10, which were filled with coke powder. this On the other hand, the product according to the present invention did not have any chips at all during manufacturing, and even after 60 days, there were no cracks at all. It showed excellent effects in no time. In addition, in the embodiment of the present invention, the ceramic plate 1 The radius of curvature R of the end portion 1b of 1 to 2 mm was excellent.

[0016]

[Table 1]

Experimental Example 2 Next, the same experiment as above was conducted using ceramic lined tubes of the present invention in which the size of the ceramic plate 1 and the radius of curvature R of the end face 1b were varied. The results are shown in Table 2.

[0018] As shown in Table 2, in order to eliminate the occurrence of chipping, the radius of curvature R of the end portion 1b must be set to 1 It can be seen that it is sufficient to set the value to mm or more. However, if the radius of curvature R is too large, the ceramic The dent between the back plates 1 and 1 becomes larger, and that part wears out faster. The radius of curvature R is 50% or less, preferably 40% or less of the thickness of the ceramic plate 1. The food was good.

[0019]

[Table 2]

[0020] In the above embodiment, the end surface 1b of the ceramic plate 1 is curved. Although the description has only been made with chamfered shapes as shown in Figure 3(b), the same applies to chamfered ones. As a result of similar experiments, it was found that the width C of the chamfered portion was 1 mm or more, and the ceramic plate It would be better if the thickness was 40% or less of the thickness.

[0021] Furthermore, although the above embodiments have described the rectangular ceramic plate 1, The same applies to other shapes such as hexagons.

[0022]

[Effect of the idea]

As mentioned above, according to the present invention, the ceramic lining tube is By making the end of the plate curved or chamfered, the tube member can be rolled up and made into a ceramic material. Less likely to chip when ceramic plates collide with each other during manufacturing of lining pipes. Also, the contact parts between the ceramic plates are less likely to wear out during use, so there is no gap for a long time. less likely to occur. Therefore, the transported material may get stuck in the gap and mix with other materials. Ceramic ceramic is an excellent material that can be transported stably over a long period of time. Inning tubes can be provided.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing a ceramic lining tube according to an embodiment of the present invention.

FIG. 2 is a perspective view of a ceramic plate constituting a ceramic lining tube according to an embodiment of the present invention.

FIGS. 3(a) and 3(b) are side views showing other embodiments of the ceramic plate constituting the ceramic lining tube of the present invention.

FIGS. 4(a) and 4(b) are partial cross-sectional views showing the manufacturing process of a conventional ceramic lined pipe.

[Explanation of symbols]

P, P'... Ceramic lined pipe 1... Ceramic board 1a...Flat surface 1b...end face 2...Pipe member

Claims (1)

[Scope of utility model registration request] 1. A ceramic lined tube comprising a plurality of ceramic plates with curved or chamfered ends arranged on the inner surface of a tube member.