Silicon carbide anti-abrasion tile structure capable of adapting to expansion and deformation of pipe

Abstract

The utility model provides a silicon carbide anti-abrasion tile structure adaptable to expansion and deformation of a pipe, which comprises a plurality of pairs of tile-shaped piece modules, each tile-shaped piece module comprises two semicircular tile-shaped pieces which are fixedly connected together, and the two tile-shaped pieces are fixed together and nested outside the boiler pipe. A stud is fixedly connected to the lower surface of one tile-shaped piece and penetrates through the anti-abrasion tile body to be connected with a nut. The anti-abrasion tile body is fixed to the tile-shaped piece through the studs and the nuts, field disassembly and assembly are convenient, when the anti-abrasion tile body is damaged, the anti-abrasion tile body can be rapidly replaced, the service life of the whole anti-abrasion tile structure is prolonged, and then the safety of the whole boiler is improved; and the problem that the anti-abrasion tile body falls off from the boiler pipe is also avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler technical field especially a kind of silicon carbide wear-resistant tile structure that can adapt to pipe expansion and deformation. BACKGROUND

[0002] Boiler is the main equipment of thermal power plant, which is composed of various heating surfaces. The heat is transferred to the heated medium-water or steam in the boiler heating surface pipes during the combustion of fuel in the boiler furnace. The boiler heating surface can be divided into two types: the heating surface of the furnace and the flue, and the heating surface arranged in the furnace and the flue. The latter is referred to as "furnace heating surface", which includes the radiation or semi-radiation heating surface arranged in the upper part of the furnace and the convection heating surface arranged in the flue. Each level of furnace heating surface is composed of several rows of pipes, and each row of pipes is composed of several pipes. The windward surface of the first row of pipes on the windward side of each level of furnace heating surface is easily worn out due to the scouring of dust-containing flue gas. If it is worn out during the planned maintenance period, the steam leakage will force the boiler to shut down, causing significant economic losses to the power plant.

[0003] To protect the windward side pipes of the furnace heating surface from being worn out by dust-containing flue gas during the planned maintenance period and prevent steam leakage from the heating surface, a metal wear-resistant tile or other wear-resistant protection measures are generally provided on the windward surface of the first row of pipes on the windward side.

[0004] Due to the high temperature resistance and superior wear resistance of silicon carbide material compared to metal material, it is used to replace metal material for making pipe wear-resistant tile.

[0005] Silicon carbide material has high hardness but cannot withstand deformation and is easily broken. The boiler heating surface pipes will expand radially and axially, bend and deform in space, and vibrate during operation. The structure and fixing method of the original silicon carbide wear-resistant tile structure cannot fully adapt to the above conditions, and it will break and fall off under the action of extrusion caused by pipe expansion and deformation and bumping caused by vibration during operation.

[0006] After a short period of operation, the silicon carbide wear-resistant tile structure completely falls off, which causes the windward side pipes of the convection heating surface to completely lose wear-resistant protection, seriously affecting the safe operation of the heating surface pipes. INVENTION CONTENTS

[0007] In view of the above-mentioned shortcomings of the prior art, the purpose of the present utility model is to provide a silicon carbide wear-resistant tile structure that can adapt to pipe expansion and deformation, which can adapt to three-dimensional expansion and deformation of the pipe, thereby improving the service life of the wear-resistant tile.

[0008] To achieve the above object and other related objects, the utility model provides a kind of carbonized silicon anti-wear tile structure that can adapt to pipe expansion and deformation, including multiple pairs of tile piece modules, the tile piece module includes two semicircular tile pieces fixedly connected together, two tile pieces are fixedly nested in the outside of boiler pipe, the lower surface of one tile piece is fixedly connected with stud, the stud is connected with nut and penetrates anti-wear tile body.

[0009] Further, the inner circle radius of the tile piece module is greater than the outer diameter of the boiler pipe.

[0010] Further, the tile piece is made of metal material, and is fixed together by welding between the two.

[0011] Further, the thickness of the anti-wear tile body gradually decreases from the middle to both sides.

[0012] Further, the nut and the anti-wear tile are provided with a gasket and a spring washer.

[0013] Further, a circular hole and a waist-shaped hole are formed in the anti-wear tile.

[0014] Further, the radius of the circular hole is smaller than the radius of the gasket, and the width of the waist-shaped hole is smaller than the radius of the gasket.

[0015] As described above, the utility model has the following beneficial effects:

[0016] 1, the anti-wear tile body is fixed on the tile piece by stud nut, which is convenient to disassemble and assemble on site, and can be quickly replaced when the anti-wear tile body is damaged, thereby improving the service life of the entire anti-wear tile structure and improving the safety of the entire boiler. At the same time, the stud nut connection method also avoids the problem of anti-wear tile body falling off the boiler pipe.

[0017] 2, by setting multiple anti-expansion and deformation structures, the problem of anti-wear tile body being crushed due to radial expansion and bending deformation of the boiler pipe can be effectively prevented, and the service life of the anti-wear tile body is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is the installation structure diagram of the anti-wear tile described in the application.

[0019] Fig. 2 It is the installation structure diagram of the anti-wear tile described in the application.

[0020] Fig. 3 It is the sectional view of the anti-wear tile described in the application.

[0021] Fig. 4The structure diagram of the anti-wear tile without nut.

[0022] In the figure: 1, boiler pipe; 2, tile-shaped piece; 3, anti-wear tile body; 4, stud; 5, nut; 6, spring washer; 7, gasket; 8, round hole; 9, waist-shaped hole. DETAILED DESCRIPTION

[0023] The implementation of the present application is described below by specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification.

[0024] Please refer to Figs. 1 to 4 It should be understood that the structure, proportion, size, etc. shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the implementation conditions of the present application, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the specification are only for the convenience of clear description, and are not used to limit the scope of the present application. The change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope of the present application.

[0025] The present application provides a silicon carbide anti-wear tile structure that can adapt to pipe expansion and deformation, comprising a plurality of pairs of tile-shaped piece modules and an anti-wear tile body 3 located on one side of the tile-shaped piece module, wherein in the present embodiment, two pairs of tile-shaped piece modules are arranged along the length direction of the boiler pipe 1, each pair of tile-shaped piece module comprises two semicircular tile-shaped pieces 2 fixedly connected together, the inner surface of the tile-shaped piece 2 is semicircular, and the two tile-shaped pieces 2 are nested outside the boiler pipe 1 after being fixed together, and the length of the tile-shaped piece 2 is less than the length of the boiler pipe 1. In the present embodiment, the two semicircular tile-shaped pieces 2 are made of metal material and are connected together by welding, and in the present embodiment, positioning grooves are formed at the both ends of one tile-shaped piece 2, and the other tile-shaped piece 2 is provided with positioning blocks that can be inserted into the positioning grooves, and the positioning holes are inserted into the positioning grooves, so that the two tile-shaped pieces 2 can be better positioned during welding, facilitating subsequent welding work.

[0026] At the same time, one of the tile-shaped pieces 2 is fixedly connected with a stud 4 on the lower surface, and in the present embodiment, the stud 4 is welded to the lower surface of the tile-shaped piece 2.

[0027] Meanwhile, the stud 4 penetrates the wear-resistant tile body 3 on one side of the tile-shaped sheet 2 and is connected with a nut 5, and a part of the wear-resistant tile body 3 abuts against a part of the tile-shaped sheet 2, so that the position between the wear-resistant tile body 3 and the tile-shaped sheet 2 is defined by the fixing of the bolt and nut 5.

[0028] Meanwhile, considering the radial expansion and bending deformation of the boiler pipe 1 under the hot state, the inner circle radius of the tile-shaped sheet 2 is greater than the outer diameter of the boiler pipe 1, and in the embodiment, the inner circle radius of the tile-shaped sheet 2 is 2 mm greater than the outer diameter of the boiler pipe 1.

[0029] Meanwhile, the thickness of the wear-resistant tile body 3 gradually decreases from the middle to the two sides, that is, the thickness of the two sides of the wear-resistant tile body 3 is less than the thickness of the middle windward side, so that there is a larger gap between the two sides of the wear-resistant tile body 3 and the boiler pipe 1, which can effectively avoid the damage of the wear-resistant tile body 3 caused by the radial expansion and bending deformation of the boiler pipe 1, and can also reduce the vibration contact and be conducive to avoiding the vibration damage of the wear-resistant tile body 3. In the embodiment, the thickness of the wear-resistant tile is designed as 10 mm on the two sides and 20 mm on the middle windward side, with an arc transition to form a "water droplet shape".

[0030] Meanwhile, a gasket 7 and a spring washer 6 are arranged between the nut 5 and the wear-resistant tile body 3. Specifically, in order to avoid the damage of the wear-resistant tile body 3 caused by the contact between the nut 5 and the wear-resistant tile body 3, the gasket 7 is arranged between the wear-resistant tile body 3 and the nut 5.

[0031] Meanwhile, in order to avoid the loosening caused by the expansion and contraction of the stud 4 due to temperature change and the loosening and damage of the bolt and nut 5 caused by vibration during operation, and also to avoid the damage of the wear-resistant tile body 3 caused by the nut 5 when the boiler pipe 1 is deformed, a spring washer 6 is arranged between each nut 5 and gasket 7, the spring washer 6 is installed between the washer and the nut 5, and the damage of the surface of the wear-resistant tile body 3 caused by the spring washer 6 is avoided. Meanwhile, in order to further loosen, the nut 5 and the stud 4 are spot welded after the threaded connection of the nut 5 and the stud 4 is completed, so as to further avoid loosening caused by vibration.

[0032] Meanwhile, a circular hole 8 and a waist-shaped hole 9 are arranged on the wear-resistant tile for the penetration of the stud 4, the radius of the circular hole 8 is less than the radius of the gasket 7, the width of the waist-shaped hole 9 is less than the radius of the gasket 7, so that the gasket 7 is located outside the wear-resistant tile body 3, and the radius of the circular hole 8 is the same as the width of the waist-shaped hole 9 and is greater than the radius of the stud 4.

[0033] When the boiler tube 1 produces transverse (perpendicular to the direction of the flue gas flow) bending deformation, the wear-resistant tile body 3 can rotate around the stud 4 at the circular hole 8, and the other stud 4 can slide in the waist-shaped hole, and the expansion difference is absorbed by the sliding of the stud 4 at the waist-shaped hole, so that the wear-resistant tile body 3 is not affected by the bending force to cause damage to the wear-resistant tile body 3.

[0034] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A silicon carbide wear-resistant tile structure adaptable to pipe expansion and deformation, characterized in that: The system includes multiple pairs of tile-shaped modules. Each tile-shaped module consists of two semi-circular tile-shaped pieces fixedly connected together. These two pieces are nested together outside the boiler tube. A stud is fixedly connected to the lower surface of one of the tile-shaped pieces. The stud penetrates the wear-resistant tile body and connects to a nut. The inner radius of the tile-shaped module is larger than the outer diameter of the boiler tube. The thickness of the wear-resistant tile body gradually decreases from the middle to both sides, resulting in a large gap between the sides of the wear-resistant tile body and the boiler tube. A washer and a spring washer are provided between the nut and the wear-resistant tile. The wear-resistant tile has a circular hole and an oblong hole.

2. The silicon carbide wear-resistant tile structure adaptable to pipe expansion and deformation according to claim 1, characterized in that: The tile-shaped pieces are made of metal and are fixed together by welding.

3. The silicon carbide wear-resistant tile structure adaptable to pipe expansion and deformation according to claim 1, characterized in that: The radius of the circular hole is smaller than the radius of the gasket, and the width of the oblong hole is smaller than the radius of the gasket.

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