CN212339227U

CN212339227U - Novel CFB boiler membrane wall gridding anti-abrasion alloy plate

Info

Publication number: CN212339227U
Application number: CN202020926909.0U
Authority: CN
Inventors: 刘上中
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-01-12
Anticipated expiration: 2030-05-28

Abstract

The utility model discloses a novel CFB boiler diaphragm type wall latticed abrasionproof alloy board, include: the first side wall of the alloy plate is internally concave at intervals to form more than one matching wall; the part of the first side wall which is not concave inwards to form a matching wall forms a welding side wall, and the welding side wall is concave inwards to form more than one welding through hole wall; a first connecting part is arranged at one side close to the third side wall; a second connecting part is arranged at one side close to the fourth side wall; the protruding face of locating the alloy board of first connecting portion, including supporting part and buckle portion, the one end and the alloy board of supporting part are connected, and the other end and the buckle portion of supporting part are connected, and second connecting portion and buckle portion cooperation are connected. The utility model provides high this abrasionproof alloy board and diaphragm type wall welded firm nature and steadiness have reduced the fault rate of abrasionproof alloy board, have improved the life of this abrasionproof alloy board, reduce the cost of maintenance of CFB boiler, avoid the inner wall of CFB boiler to appear bad phenomena such as local wear, hole wear.

Description

Novel CFB boiler membrane wall gridding anti-abrasion alloy plate

Technical Field

The utility model relates to a CFB boiler wear plate technical field, more specifically relates to a novel CFB boiler diaphragm type wall latticed abrasionproof alloy board.

Background

10 million tons of low-quality coal waste can be generated in 40 million tons of coal output in China, a CFB (circulating fluidized bed) boiler is a coal-fired boiler with the highest industrialization degree and relatively clean and efficient performance, and the CFB boiler adopts fluidized combustion and is an advanced technology for energy utilization of difficult-to-burn solid fuels (such as coal gangue, oil shale, municipal refuse, sludge and other wastes). The energy generated by combustion can be used for power generation and heat supply, and the steam generated after the water in the hanging screen is boiled can also be directly used in industrial production (such as ironing in the clothing industry).

However, in the use process of the fluidized bed boiler, the problem of hearth abrasion is faced, and aiming at the problem of serious abrasion of the heating surface caused by fluidized combustion in the combustion chamber, one of the prior art adopts a mode of covering the heating surface by using a wear-resistant inorganic material (hearth castable) in areas with serious abrasion, such as the positions near the smoke window outlet, the positions near the wall-penetrating pipe, the bottom of the suspension screen, the dense-phase area and the like in the hearth of the circulating fluidized bed boiler, so as to avoid abrasion, but the method is passive, has a certain anti-abrasion effect, reduces the effective heat absorption area of the hearth of the boiler due to the heat insulation performance of the castable, and reduces the heat exchange efficiency of the hearth; another prior art (for example, patent with application number CN 201410300048) is an active manner of arranging an anti-wear alloy plate on the inner wall of the CFB boiler to reduce the surface speed, which is separated from the coverage thickening of the above-mentioned passive manner, thereby ensuring the heat exchange efficiency, because the existing anti-wear alloy plate is welded above or below the side wall thereof, but the welded joint is shallow, the existing anti-wear alloy plate is not firmly welded with the inner wall of the CFB boiler, and the failure rate of the anti-wear alloy plate is as high as three per thousand under the environment of solid fuel scouring and thermal expansion of the welded part, and even more, because the existing anti-wear alloy plates are mutually arranged on the inner wall of the CFB boiler in a mesh manner by overlapping, the anti-wear alloy plate with failure will be separated from the inner wall of the CFB boiler to erode the welded part, which may cause local wear of the inner wall of the CFB boiler, And the CFB boiler has high maintenance cost due to the unfavorable phenomena of hole penetration and the like.

Disclosure of Invention

To the above defect or the improvement demand of prior art, the utility model provides a novel CFB boiler diaphragm type wall latticed abrasionproof alloy board, novel CFB boiler diaphragm type wall latticed abrasionproof alloy board includes:

the first side wall of the alloy plate is internally concave at intervals to form more than one matching wall; the part of the first side wall which is not recessed to form the matching wall forms a welding side wall for welding with the membrane wall, the welding side wall is recessed to form more than one welding through hole wall, and the welding through hole wall is surrounded to form a welding through hole; the third side wall of the alloy plate and the fourth side wall of the alloy plate are oppositely arranged; a first connecting part is arranged on one side, close to the third side wall, of the alloy plate; a second connecting part is arranged on one side, close to the fourth side wall, of the alloy plate; the first connecting part and the second connecting part are suitable for realizing the connection of the two alloy plates; the first connecting portion is arranged on the alloy plate in a protruding mode and comprises a supporting portion and a clamping portion, one end of the supporting portion is connected with the alloy plate, the other end of the supporting portion is connected with the clamping portion, and the second connecting portion is connected with the clamping portion in a matched mode.

Optionally, a third side wall and a fourth side wall of the alloy plate, which are close to the alloy plate, are provided with the first connecting part or the second connecting part; two adjacent alloy plates are connected through the first connecting portion and the second connecting portion.

Optionally, when the alloy plates are sequentially connected end to end through the first connecting portion and the second connecting portion, the alloy plates are arranged in a linear manner or a stepped manner.

Optionally, the first connecting portion and the second connecting portion are arranged on the same side, and the second connecting portion is a clamping groove formed by recessing a plate surface of the alloy plate; the third side wall is recessed in a position corresponding to the buckling part to form a sliding groove; a sliding buckle part which is connected with the sliding groove in a sliding manner is arranged on one side, close to the fourth side wall, of the alloy plate; the sliding buckle part and the clamping groove are respectively arranged on two plate surfaces of the alloy plate; the clamping part is connected with the clamping groove in a buckling mode, so that more than two alloy plates are arranged in a step shape.

Optionally, the support portion and the buckling portion are arranged on the alloy plate in a T shape; the second connecting part is a hook groove formed by inwards concave fourth side walls; the supporting part is in sliding connection with the hook groove, so that the buckling part is arranged above the hook groove in an overlapped mode, and more than two alloy plates are arranged in a step shape.

Optionally, the first side wall is provided with three or more fitting walls at intervals, including a first fitting wall, one or more second fitting walls, and a third fitting wall; the second matching wall forms an arc matched with a membrane wall pipe; the first matching wall and the third matching wall are spliced together to form an arc matched with a membrane wall pipe, and the first matching wall and the third matching wall are respectively arranged on two sides of all the second matching walls.

Optionally, the mating wall forms an arc that fits a membrane wall tube; or the matching wall forms an avoiding groove matched with the membrane wall.

Optionally, the mating wall and the welding side wall are in a chamfered arrangement or a concave transition.

Optionally, the mating wall spacing indent forms more than one transition wall.

Optionally, the second side wall of the alloy plate is internally concave at intervals to form more than one flow groove; the first side wall and the second side wall are arranged oppositely.

Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can gain following beneficial effect:

(1) the utility model discloses in, when realizing this abrasionproof alloy board and the welding of diaphragm type wall, the accessible welds after inserting the welding through-hole with the welding rod, the welding seam can run through whole this abrasionproof alloy board, this abrasionproof alloy board has been improved greatly with diaphragm type wall welded firm nature and steadiness, greatly reduced the fault rate of abrasionproof alloy board, the life of this abrasionproof alloy board has been improved, the reduction of the fault rate of this abrasionproof alloy board has prolonged the use prescription of the net that comprises it, thereby avoid the inner wall of CFB boiler to appear local wear, the phenomenon is worn in the hole, the life of extension CFB boiler, the maintenance cycle of CFB boiler has been prolonged, reduce the cost of maintenance of CFB boiler. Preferably, the anti-abrasion alloy plate has the advantages of the existing anti-abrasion alloy plate, such as no coverage thickening; the heat exchange efficiency is high; the temperature of the CFB boiler can be effectively reduced due to high heat exchange efficiency, the emission of pollutants such as oxynitride and the like generated due to high temperature can be effectively reduced, and meanwhile, the generation of the gel can be effectively controlled at low temperature; the volume of the CFB boiler can be reduced under the condition of the same power. Preferably, the fit between the welding through hole and the welding rod solves the problem of interference between the abrasion-proof alloy plate and the membrane wall (the vertex angle of the fit wall is propped against the welding line of the membrane wall) to a certain extent.

(2) The utility model discloses in, connect through the cooperation of first connecting portion and second connecting portion, make two of adjacent setting the utility model discloses can realize connecting, improve the overall structure intensity of the net that comprises this abrasionproof alloy board, make even partial this abrasionproof alloy board breaks away from the integrality that the diaphragm type wall also can guarantee whole net (break away from this abrasionproof alloy board of diaphragm type wall this moment and other this abrasionproof alloy board connection and constitute a part of net, make whole net structure complete), and then guarantee the protection timeliness of net to CFB boiler inner wall (diaphragm type wall or diaphragm type wall pipe), avoided among the prior art because of individual abrasionproof alloy board breaks away from the diaphragm type wall and leads to the net to appear local damage and make this damage part can't protect CFB boiler inner wall, and then lead to the diaphragm type wall to appear local wear in this department, bad phenomenon such as hole is worn.

(3) The utility model discloses in, first connecting portion and second connecting portion cooperation mode can be simple and convenient, reliable, firm connected mode such as buckle formula, bearing formula, have improved greatly the utility model discloses a product is diversified, satisfies different customer demands, has improved the utility model discloses a practicality and application scope.

(4) The utility model discloses in, through the cooperation of spout and hasp portion, improved greatly the utility model discloses an assembly efficiency to shorten the required time limit for a project that the net was built.

(5) The utility model discloses in, the chamfer setting or indent transition effectively avoid the interference problem of this abrasionproof alloy board and diaphragm type wall, effectively avoid the apex angle department of this cooperation wall to support the welding seam of diaphragm type wall, have further guaranteed this abrasionproof alloy board and diaphragm type wall welding tightness.

(6) The utility model discloses in, the transition wall has guaranteed that this abrasionproof alloy board has certain clearance with the diaphragm type wall pipe to wash away the solid particle that is at this abrasionproof alloy board can be in the below of this clearance flow direction CFB boiler, make piling up as few as possible of solid particle on this abrasionproof alloy board, effectively avoided piling up solid particle on this abrasionproof alloy board and scouring away the process next and produce a large amount of raise dusts, thereby reach dust fall, dust removal effect. More excellent, this abrasionproof alloy plate and diaphragm type wall pipe clearance fit have not only improved this abrasionproof alloy plate and diaphragm type wall pipe complex adaptability, improve both cooperation error tolerance, and simultaneously, the clearance between this abrasionproof alloy plate and the diaphragm type wall pipe further improves dust fall, dust removal effect.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a front view structural schematic diagram of FIG. 1;

FIG. 3 is a bottom view of the structure of FIG. 1;

FIG. 4 is a left side view schematic of the structure of FIG. 1;

FIG. 5 is a rear view structural schematic of FIG. 1;

FIG. 6 is a schematic structural view of one embodiment of the novel CFB boiler membrane wall grid abrasion-proof alloy plate and membrane wall tube shown in FIG. 1;

FIG. 7 is a bottom view of the structure of FIG. 6;

fig. 8 is a schematic view of the structure of another embodiment of the present invention cooperating with a membrane wall pipe;

fig. 9 is a schematic structural view of another embodiment of the present invention;

FIG. 10 is a schematic structural view of an embodiment of the welded connection between the latticed wear-resistant alloy plate and the membrane wall of the CFB boiler of FIG. 9;

fig. 11 is a schematic structural view of another embodiment of the present invention;

fig. 12 is a schematic structural view of another embodiment of the present invention;

fig. 13 is a schematic diagram of two embodiments of the present invention when connected together.

In all the figures, the same reference numerals denote the same features, in particular: the structure comprises 1-alloy plate, 11-first side wall, 111-matching wall, 112-first matching wall, 113-second matching wall, 114-third matching wall, 115-arc wall, 116-transition wall, 117-welding side wall, 118-welding through hole, 119-straight transition wall, 12-second side wall, 121-circulation groove, 13-third side wall, 14-fourth side wall, 151-supporting part, 152-buckling part, 153-buckling groove, 154-buckling part, 155-sliding groove, 161-buckling part, 162-abutting part, 2-membrane wall pipe and 3-membrane wall.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

In an embodiment of the present invention, as shown in fig. 1-7, a novel CFB boiler membrane wall gridding anti-wear alloy plate comprises: the alloy plate 1, the first side wall 11 of the alloy plate 1 is recessed at intervals to form more than one matching wall 111, and the matching wall 111 is matched with the membrane wall pipe 2; the part of the first side wall 11 which is not recessed to form the matching wall 111 forms a welding side wall 117 for welding connection with the membrane wall 3, the welding side wall 117 is recessed to form more than one welding through hole wall, and the welding through hole wall is surrounded to form a welding through hole 118 for inserting a welding rod.

In practical applications, the central angle of the fitting wall 111 can be set according to the central angle occupied by the portion of the membrane wall tube 2 protruding from the membrane wall 3 in the CFB boiler to which the fitting wall 111 is applied, and when the central angle of one fitting wall 111 can be not less than the central angle of the membrane wall tube 2, the one fitting wall 111 can be independently arranged around the periphery of the membrane wall tube 2; when the central angle of one mating wall 111 is smaller than that of the membrane-wall tube 2, the mating wall 111 and the mating wall 111 of another alloy plate 1 disposed adjacent to the mating wall 111 may be arranged around the periphery of the membrane-wall tube 2.

Therefore, the central angle of the matching wall 111 may be equal to 180 °, greater than 180 °, or less than 180 °, and may be set according to the actual situation of the membrane wall tube 2, which is not described herein again. It will be understood that each alloy plate 1 is provided with at least one mating wall 111 and one through-hole 118 for welding. When each alloy plate 1 is provided with one matching wall 111 and two welding side walls 117 (at this time, the two welding side walls 117 are respectively disposed on two sides of the matching wall 111), both the two welding side walls 117 may be provided with welding through holes 118, one of the welding side walls 117 may be provided with welding through holes 118, one welding side wall 117 may be provided with more than one welding through hole 118 at intervals, and one welding through hole 118 may be provided with more than one welding rod. Similarly, when each alloy plate 1 is provided with more than two matching walls 111 and more than one welding side wall 117, more than one welding through hole 118 can be arranged at intervals on one welding side wall 117, more than one welding rod can be arranged on one welding through hole 118, the central angles of the matching walls 111 can be the same or different, and optionally, the welding through holes 118 preferably penetrate through the alloy plate 1. Of course, the weld through-hole 118 may also be a counterbore configuration. It will be appreciated that the purpose of the mating wall 111 is to give way to the membrane wall tube 2 to effect the welding of the invention with the membrane wall 3. Therefore, the outer contour of the matching wall 111 may be a smooth curve (e.g. arc, U-shape) or a non-smooth curve (polygon, such as more than one quadrangle, triangle, arc, five deformations, etc. connected in sequence), and optionally, the connecting line of the portion of the matching wall 111 closest to the membrane wall tube 2 forms an approximate arc structure, preferably approximating the shape of the arc wall surface of the membrane wall tube 2 as much as possible.

Optionally, the first side wall 11 is provided with three or more fitting walls 111 at intervals, including a first fitting wall 112, one or more second fitting walls 113, and a third fitting wall 114; the second mating wall 113 forms an arc adapted to a diaphragm wall tube 2; the first mating wall 112 and the third mating wall 114 are joined together to form an arc adapted to a diaphragm wall tube 2, and the first mating wall 112 and the third mating wall 114 are disposed on both sides of all the second mating walls 113. It can be understood that the first mating wall 112 and the third mating wall 114 may be formed by abutting the sidewalls along the radial direction of the membrane-type wall tube 2 and then jointly forming an arc adapted to the membrane-type wall tube 2, that is, two adjacent alloy plates 1 are horizontally and horizontally arranged, and are joined end to end. The first matching wall 112 and the third matching wall 114 may also jointly form an arc adapted to the membrane-type wall tube 2 after overlapping portions along the axial direction of the membrane-type wall tube 2, that is, two adjacent alloy plates 1 are overlapped along the axial direction of the membrane-type wall tube 2 and arranged in a step shape, so that the first matching wall 112 and the third matching wall 114, which are adjacently arranged and respectively located on different alloy plates 1, are partially overlapped at positions close to each other (as shown in fig. 7) and jointly form an arc enclosed outside the membrane-type wall tube 2. In practical applications, the central angles of the first and

third mating walls

112 and 114 may be the same or different; optionally, the central angles of the first and

third mating walls

112 and 114 are not less than 90 ° and not more than 180 °.

Optionally, the mating wall 111 and the welding sidewall 117 are chamfered, and the chamfer may be a right angle chamfer (i.e., a straight transition 119) or an arc chamfer.

Optionally, the mating walls 111 are recessed to form more than one transition wall 116. The setting of transition wall 116 has guaranteed to have the clearance (no matter whether cooperation wall 111 and diaphragm type wall pipe 2 are sealed laminating or clearance fit) between cooperation wall 111 and the diaphragm type wall pipe 2 to make alloy plate 1 can not pile up the solid particle when the inner wall of protection CFB boiler, the preferred solid particle of avoiding produces the raise dust phenomenon in the scouring next time because of piling up on alloy plate 1, thereby reach dust fall and dust removal effect. It will be appreciated that two or more transition walls 116 of a mating wall 111 may or may not be in communication in sequence, and when two or more transition walls 116 of a mating wall 111 are not in communication, the part of the mating wall 111 not recessed to form the transition walls 116 will form the curved wall 115 which is adapted to the membrane wall tube 2. The transition wall 116 may be contoured in an arcuate or irregular shape.

Optionally, the second side wall 12 of the alloy plate 1 is recessed at intervals to form more than one flow groove 121; the first side wall 11 and the second side wall 12 are oppositely disposed. The setting of circulation groove 121 is when guaranteeing alloy plate 1's abrasionproof effect, and the solid particle of still being convenient for flows downwards through it, effectively avoids solid particle in the piling up of alloy plate 1, simultaneously, reduces the washing away that alloy plate 1 self received, protects alloy plate 1 and prolongs its life. In practical applications, the diameter of the flow-through groove 121 is preferably not more than one third of the dimension of the alloy plate 1 extending along the third sidewall 13 to ensure the structural strength of the alloy plate 1.

Alternatively, the third sidewall 13 of the alloy plate 1 and the fourth sidewall 14 of the alloy plate 1 are oppositely disposed; the first side wall 11, the third side wall 13, the second side wall 12 and the fourth side wall 14 are sequentially connected to form a side wall of the alloy plate 1; a first connecting part is arranged on one side, close to the third side wall 13, of the alloy plate 1; a second connecting part is arranged on one side, close to the fourth side wall 14, of the alloy plate 1; the first connection portion and the second connection portion are adapted to achieve connection of the two alloy plates 1. It will be understood that the two alloy plates 1 through which the connection is made may be flush or in a stepped arrangement when the first connection portion and the second connection portion are in the connected state.

Optionally, the first connecting portion is formed by a plate surface protrusion of the alloy plate 1, and includes a supporting portion 151 and a fastening portion 152, one end of the supporting portion 151 is connected to the alloy plate 1, the other end of the supporting portion 151 is connected to the fastening portion 152, and a fastening piece (formed by the fastening portion 152 protrusion or the fastening portion 152 itself) is disposed at an end portion of the fastening portion 152 far from the supporting portion 151; the second connecting portion is a slot 153 connected with the fastener. Optionally, the connection mode of the two adjacent alloy plates 1 is realized only by pre-tightening assembly of the clamping groove 153 and the clamping part, when the two adjacent alloy plates 1 are arranged flush, the end part of the clamping part 152 far away from the supporting part 151 protrudes from the third side wall 13, the clamping groove 153 is arranged on the plate surface of the alloy plate 1, and the first connecting part and the second connecting part are arranged on the same side of the alloy plate 1; when two adjacent alloy plates 1 are arranged in a step shape, the end portion of the side of the buckling portion 152 far away from the supporting portion 151 can be flush with the third side wall 13 or protrude from the third side wall 13, for convenience of description, the two adjacent alloy plates 1 are respectively a first alloy plate and a second alloy plate, the clamping groove 153 of the first alloy plate is pre-assembled with the buckling piece of the second alloy plate, and because the end portion of the first alloy plate close to the fourth side wall 14 is to be stacked between the buckling portion 152 of the second alloy plate and the end portion of the second alloy plate close to the third side wall 13, the distance between the buckling portion 152 and the second alloy plate is set to the plate thickness of the alloy plate 1, so that the first alloy plate is clamped between the buckling portion 152 of the second alloy plate and the buckling portion 152 of the second alloy plate, and the connection strength of the first alloy plate and the second alloy plate is improved. Optionally, the third sidewall 13 of the alloy plate 1 is recessed to form a sliding groove 155 corresponding to the fastening portion 152 thereof, the position of the alloy plate 1 close to the fourth sidewall 14 is provided with a sliding fastening portion 154 corresponding to the sliding groove 155, the sliding fastening portion 154 is slidably connected to the sliding groove 155, at this time, the sliding fastening portion 154 and the sliding groove 155 not only play a role in positioning and limiting the first alloy plate and the second alloy plate which are adjacently arranged, so that the first alloy plate and the second alloy plate are more conveniently assembled, but also the matching of the sliding fastening portion 154 and the sliding groove 155 ensures the connection strength of the first alloy plate and the second alloy plate, so that in practical application, even if any one of the first alloy plate and the second alloy plate is separated from the film-type wall 3, the other alloy plate 1 can be clamped by the matching of the fastening portion 152 and the clamping groove 153, and the fastening portion 152 and the alloy plate 1 to ensure the integrity of the grid, and further the matching of the sliding fastening portion 154 and the sliding groove 155 can realize the connection reinforcement and the second alloy plate and the connection reinforcement of the first alloy plate and the second alloy plate And (5) limiting. Alternatively, the slider portion 154 is formed by the alloy plate 1 being protruded, and the outer contour of the slider portion 154 may be arc-shaped or square-shaped.

In another embodiment of the present invention, based on the above embodiment, the first connection portion is a shape memory alloy member (i.e., the first connection portion is a member that deforms and is recoverable). It can be understood that the first connecting portion can deform to realize the pre-tightening assembly of the locking member with the locking groove 153 when the locking member deforms (formed by the locking portion 152 itself or formed by the locking portion 152 protruding toward one side of the sliding groove 155), and the first connecting portion will return to the previous state after the locking member is assembled with the locking groove 153, so as to facilitate the processing and design of the first connecting portion.

In another embodiment of the present invention, different from the above embodiments, the locking portion 152 is coupled to the supporting portion 151.

In another embodiment of the present invention, different from the above embodiments, the locking portion 152 and the supporting portion 151 are smoothly transited and integrally formed.

In another embodiment of the present invention, different from the above embodiments, there is a concave transition between the fitting wall 111 and the welding sidewall 117.

In another embodiment of the present invention, as shown in fig. 8, different from the above embodiment, the first connection portion is formed by a plate surface protrusion of the alloy plate 1, and includes a clamping column portion 161 (i.e. the above supporting portion 151) and an abutting portion 162 (i.e. the above clamping portion 152), one end of the clamping column portion 161 is connected to the alloy plate 1, and the other end of the supporting portion 151 is connected to the abutting portion 162; the second connecting part is a hook groove formed by the concave inner of the fourth side wall 14; the catch portion 161 slides to the hook groove along the extending direction of the first side wall 11, so that two or more alloy plates 1 are arranged in a step shape. Alternatively, when two adjacent alloy plates 1 are connected by the hook groove, the clamping column portion 161 and the abutting portion 162, the alloy plate 1 through which the clamping column portion 161 passes is interposed between the abutting portion 162 connected to the clamping column portion 161 and the other alloy plate 1, so as to improve the connection strength of the two alloy plates 1.

In another embodiment of the present invention, on the basis of any of the above-mentioned embodiments, the welding sidewall 117 is thinned, so that the thickness dimension of the welding sidewall 117 is smaller than the second sidewall 12, the third sidewall 13, and the fourth sidewall 14. Optionally, the spacing between the mating wall 111 and the membrane-wall tube 2 is 0.5-2cm, preferably 1 cm. So as to improve the tolerance of the processing error of the matching wall 111 and the membrane wall pipe 2 and ensure the matching of the two. Optionally, the furthest distance of the transition wall 116 from the membrane-wall tube 2 is 1.5-5cm, preferably 3 cm.

Illustratively, the size of the alloy plate 1 in the extending direction (i.e., the length direction) of the first side wall 11 and the second side wall 12 is 110 cm; the size of the alloy plate 1 in the extending direction (i.e., width direction) of the third and

fourth side walls

13 and 14 is 52 cm; the thickness dimension (i.e., thickness dimension) of the alloy plate 1 was 4.5 cm; and the first side wall 11 is provided with three matching walls 111, namely a first matching wall 112, a second matching wall 113 and a third matching wall 114, wherein the first matching wall 112 and the third matching wall 114 are symmetrically arranged and the central angles of the first matching wall 112 and the third matching wall 114 are both larger than 90 degrees. The center distance between two adjacent matching walls 111 is 49.8 cm; a welding side wall 117 is formed between two adjacent matching walls 111, each welding side wall 117 is provided with a welding through hole 118, and the radius of each welding through hole 118 is 2 cm; the length of the welding side wall 117 is 10cm, the thickness of the welding side wall 117 is 2.25cm, and the size of the chamfer thereof in the width direction is 3 cm; the diameter of the membrane wall pipe 2 is 32cm, the distance between the matching wall 111 and the membrane wall pipe 2 is 1cm, and the maximum distance between the transition wall 116 and the membrane wall pipe 2 is 3 cm; the circulation grooves 121 are arc-shaped grooves, the size of the circulation grooves 121 in the length direction is 24cm, the size of the circulation grooves 121 in the width direction is 7cm, the second side wall 12 is provided with two circulation grooves 121, and the center distance between every two adjacent circulation grooves 121 is 50 cm; the distance between the buckling part 152 and the second side wall 12 is 12cm, the size of the buckling part 152 in the width direction is 12cm, and the distance between the buckling part 152 and the plate surface of the alloy plate 1 is 5.5 cm; the width of the sliding groove 155 is 14cm, and the length of the sliding groove 155 is 19.5 cm; the thickness of the clamping groove 153 and the thickness of the sliding buckle part 154 are both 1.5 cm; the locking groove 153 is a spherical groove with a radius of 5cm, and the supporting portion 151, the locking portion 152 and the alloy plate 1 are all in smooth transition through a chamfer with a radius of 5 cm.

In practical applications, a plurality of alloy plates 1 described in the above embodiments are transversely spliced to the membrane wall 3 (as shown in fig. 7 and 8) so that the mating wall 111 is sleeved outside the membrane wall tube 2, and the welding sidewall 117 of the alloy plate 1 is welded to the membrane wall 3 by welding rods inserted into the welding through holes 118. Of course, the welding reinforcement of the alloy plate 1 and the membrane wall 3 may be further achieved above and/or below the welding side wall 117.

In another embodiment of the present invention, as shown in fig. 9 and 10, unlike any of the above embodiments, the fitting wall 111 of the present embodiment constitutes an escape groove fitted to the membrane wall 3. It can be understood that, when the present invention is welded to the boiler inner wall along the height direction (the boiler inner wall is formed by sequentially sealing and connecting the membrane type wall 2 and the membrane type wall 3 in the circumferential direction, and part of the wall of the membrane type wall 2 protrudes inward from the membrane type wall 3 along the radial direction), the present alloy plate 1 is welded to the membrane type wall 3 by inserting welding rods through the welding through holes 118, because both sides of the membrane type wall 3 are the membrane type wall 2, and the membrane type wall 2 protrudes inward from the membrane type wall 3, the part of the alloy plate 1 close to one side of the membrane type wall 3 has no anti-abrasion effect due to the blocking effect of the membrane type wall 2, therefore, the rest parts of the first side wall 11 except the welding side wall 117 can not contact with the membrane type wall 3, the size of the avoiding groove along the radial direction can not be small and smaller than the size of the membrane type wall 2 protruding from the membrane type wall 3, of course, the size of the avoiding groove along the radial direction can be slightly larger than the size of the, for example, the distance between the matching wall 111 and the film-wall tube 2 is 0 to 1.5 cm. More preferably, the contact area between the alloy plate and the membrane wall 3 is greatly reduced due to the arrangement of the avoiding groove, so that the probability of contact interference between the alloy plate 1 and the membrane wall 3 is reduced (for example, the membrane wall 3 cannot be completely attached to the alloy plate 1 due to swelling or abrasion and the like, the welding effect is influenced), and the welding reliability between the alloy plate 1 and the membrane wall 3 is ensured. Preferably, the weight of the alloy plate 1 can be reduced by arranging the avoiding groove. It should be noted that, when the present invention is welded to the membrane wall 3 along the height direction, the fitting wall 111 may be flush with the welding sidewall 117, but the present invention also falls within the protection scope. In practical application, the cross-sectional shape of the avoidance groove can be a regular polygon or an irregular polygon, and can also be formed by splicing more than two shapes, and the specific structure is set according to practical application.

In practical application, a plurality of alloy plates 1 described in the above embodiments are longitudinally (i.e. in the height direction) spliced to the membrane wall 3 (as shown in fig. 10), so that the welding side wall 117 of the alloy plate 1 is welded to the membrane wall 3 by welding rods inserted into the welding through holes 118, thereby achieving the speed reduction of the fluid flowing along the circumferential direction of the boiler inner wall (the membrane wall 3 and the membrane wall tube 2), reducing the scouring of the boiler inner wall by the fluid flowing along the circumferential direction, protecting the boiler inner wall, and reducing the wear thereof. Of course, the welding reinforcement of the alloy plate 1 and the membrane wall 3 may be further achieved by the left and/or right side of the welding sidewall 117. It is worth to say that, can also weld this alloy board 1 respectively transversely and longitudinally in boiler inner wall simultaneously for a plurality of this alloy boards 1 form the net abrasionproof area in boiler inner wall, all-round protection boiler inner wall, prolong its life cycle.

In the utility model discloses an in another embodiment, different from any one of the above-mentioned embodiments, the unsmooth cooperation of first connecting portion and the second connecting portion of this embodiment realizes the lock and connects, and first connecting portion is protruding for the lateral wall that is formed by alloy board 1, and the recess that the second connecting portion is formed by the lateral wall indent of alloy board 1, protruding and the recess suits in order to realize being connected of two adjacent alloy boards 1 that set up.

In another embodiment of the present invention, as shown in fig. 11 to 13, different from any of the above embodiments, the alloy plates 1 of this embodiment are provided with a first connecting portion or a second connecting portion near the third side wall 13 and the fourth side wall 14, so that two adjacent alloy plates 1 are connected by the first connecting portion and the second connecting portion. It should be noted that, when the same alloy plate 1 is provided with two first connecting portions or two second connecting portions, the two first connecting portions and the two second connecting portions may be disposed on the same side of one plate surface of the alloy plate 1 or disposed on two plate surfaces of the alloy plate 1.

It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.

Claims

1. The utility model provides a novel CFB boiler membrane wall meshing abrasionproof alloy board which characterized in that includes:

the first side wall of the alloy plate is internally concave at intervals to form more than one matching wall; the part of the first side wall which is not recessed to form the matching wall forms a welding side wall for welding with the membrane wall, the welding side wall is recessed to form more than one welding through hole wall, and the welding through hole wall is surrounded to form a welding through hole;

the third side wall of the alloy plate and the fourth side wall of the alloy plate are oppositely arranged; a first connecting part is arranged on one side, close to the third side wall, of the alloy plate; a second connecting part is arranged on one side, close to the fourth side wall, of the alloy plate; the first connecting part and the second connecting part are suitable for realizing the connection of the two alloy plates; the first connecting portion is arranged on the alloy plate in a protruding mode and comprises a supporting portion and a clamping portion, one end of the supporting portion is connected with the alloy plate, the other end of the supporting portion is connected with the clamping portion, and the second connecting portion is connected with the clamping portion in a matched mode.

2. The novel CFB boiler membrane wall gridding anti-wear alloy plate of claim 1, wherein:

the alloy plate is provided with a first connecting part or a second connecting part on a third side wall and a fourth side wall which are close to the alloy plate;

two adjacent alloy plates are connected through the first connecting portion and the second connecting portion.

3. The novel CFB boiler membrane wall gridding anti-wear alloy plate as claimed in claim 1 or 2, wherein:

when the alloy plates are sequentially connected end to end through the first connecting portion and the second connecting portion, the alloy plates are arranged in a linear type or a step shape.

4. The novel CFB boiler membrane wall gridding anti-wear alloy plate of claim 3, wherein:

the first connecting part and the second connecting part are arranged on the same side, and the second connecting part is a clamping groove formed by the inward concave surface of the alloy plate;

the third side wall is recessed in a position corresponding to the buckling part to form a sliding groove;

a sliding buckle part which is connected with the sliding groove in a sliding manner is arranged on one side, close to the fourth side wall, of the alloy plate;

the sliding buckle part and the clamping groove are respectively arranged on two plate surfaces of the alloy plate;

the clamping part is connected with the clamping groove in a buckling mode, so that more than two alloy plates are arranged in a step shape.

5. The novel CFB boiler membrane wall gridding anti-wear alloy plate of claim 3, wherein:

the supporting part and the buckling part are arranged on the alloy plate in a T shape;

the second connecting part is a hook groove formed by inwards concave fourth side walls;

the supporting part is in sliding connection with the hook groove, so that the buckling part is arranged above the hook groove in an overlapped mode, and more than two alloy plates are arranged in a step shape.

6. The novel CFB boiler membrane wall gridding anti-wear alloy plate as claimed in claim 1 or 2, wherein:

the first side wall is provided with more than three matching walls at intervals, and the matching walls comprise a first matching wall, more than one second matching wall and a third matching wall;

the second matching wall forms an arc matched with a membrane wall pipe;

the first matching wall and the third matching wall are spliced together to form an arc matched with a membrane wall pipe, and the first matching wall and the third matching wall are respectively arranged on two sides of all the second matching walls.

7. The novel CFB boiler membrane wall gridding anti-wear alloy plate as claimed in claim 1 or 2, wherein:

the matching wall forms an arc matched with a membrane wall pipe; or the like, or, alternatively,

the matching wall forms an avoiding groove matched with the membrane wall.

8. The novel CFB boiler membrane wall gridding anti-wear alloy plate as claimed in claim 1 or 2, wherein:

the matching wall and the welding side wall are in chamfer arrangement or concave transition.

9. The novel CFB boiler membrane wall gridding anti-wear alloy plate as claimed in claim 1 or 2, wherein:

the mating walls are spaced apart and recessed to form more than one transition wall.

10. The novel CFB boiler membrane wall gridding anti-wear alloy plate as claimed in claim 1 or 2, wherein:

the second side wall of the alloy plate is internally concave at intervals to form more than one circulation groove;

the first side wall and the second side wall are arranged oppositely.