Wear-preventing tiles for H-shaped finned carbonizer pipes.

Abstract

The present invention relates to the field of heat exchange tube technology for boiler heating surfaces, and particularly to a wear protection tile for H-finned economizer tubes. The economizer includes a tube body and a plurality of fins attached to the outer wall of the tube body, with two fins of the same height forming an H shape; and a protective member attached to the outer wall of the economizer. The protective member includes a bendable plate attached to the outer wall of the tube body and a protective shell fitted to the outer wall of the fins. The protective shell has a push-out member fitted to the outer wall of the tube body, and the push-out member locks the positions of the two protective shells inserted into each other at the same height using a transmission member, and drives a clamp plate inside the protective shell to snap against the outer wall of the plate, locking the protective shell and the plate. The protective shell and the plate together provide comprehensive protection for the tube body and each fin, thereby achieving the objective of encasing and protecting the economizer.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchanger tubes for boiler heating surfaces, and particularly to wear-resistant tiles for economizer tubes with H-shaped fins.

Background Art

[0002] As one of the heating surfaces of a thermal power plant boiler, in order to improve the heat exchange efficiency per unit area, economizers often use tubes with H-shaped fins. Also, in the H-shaped fins, by dividing the exhaust gas flow path into several small areas, the gas flow is equalized. Compared with a plain tube economizer, the heat exchange efficiency is high and the economy is good. However, during operation, the wear of the pipe surface caused by fly ash significantly endangers the safe operation of the equipment. Therefore, it is necessary to install wear-resistant tiles, thereby reducing the wear caused by fly ash on the upwind side of the pipe and extending the service life of the pipe. Due to the influence of H-shaped fins, conventional wear-resistant tiles cannot be used.

[0003] The present patent invention provides a novel and special wear-resistant tile for an economizer tube with H-shaped fins. The wear-resistant tile made by the present invention adopts a carbon structural steel plate and can be firmly assembled on the surface of the pipe. It has excellent wear prevention performance and high reliability. The present invention is easy to manufacture, has a wide application range, and has high value for popularization and application.

Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly explain some preferred embodiments. In this part, the abstract of the present application, and the name of the invention, in order to avoid the purpose becoming unclear, simplification or omission can be made, and such simplification or omission is not used to limit the scope of the present invention.

[0005] In light of the problem that wear on the pipe surface due to fly ash significantly jeopardizes the safe operation of the equipment in the existing wear-prevention tiles for H-shaped finned economizer pipes described above, the present invention is proposed to reduce wear on the windward side of the pipe due to fly ash.

[0006] Therefore, the present invention provides wear-preventing tiles for H-shaped finned economizer tubes, with the aim of extending the service life of economizer components.

[0007] To solve the above technical problems, the present invention provides the following technical solution: A wear prevention tile for an H-shaped finned economizer tube, which includes an economizer member comprising a tube and a plurality of fins attached to the outer wall of the tube, the fins of which are of the same height and form an H shape, The protective member is attached to the outer wall of the economizer member, and the protective member includes a bendable plate attached to the outer wall of the tube and a protective shell fitted to the outer wall of the fin, and an extruded member is provided inside the protective shell which is attached to the outer wall of the tube, and the extruded member locks the positions of two parts of the protective shell which are inserted into each other at the same height by a transmission member, and drives a clamp plate inside the protective shell to snap against the outer wall of the plate, thereby locking the protective shell and the plate.

[0008] A preferred embodiment of the wear-preventing tile for the H-shaped finned economizer tube described in the present invention is that the plate shape is continuous TIFF0007854515000001.tif5170 It has a letter shape and is composed of multiple horizontal plates and one vertical plate, and the fin is positioned between adjacent horizontal plates.

[0009] In a preferred embodiment of the wear-preventing tile for the H-shaped finned economizer tube described in the present invention, the protective shell is divided into two parts, each part comprising a central cavity and mounting cavities on both sides, the fins are housed in the cavity, and the extrusion member, the transmission member and the clamp plate are all provided in two sets, each positioned in one of the two mounting cavities.

[0010] In a preferred embodiment of the wear-preventing tile for the H-shaped finned economizer tube described in the present invention, the extruded member includes an arc-shaped plate attached to the outer wall of the plate body, an inclined surface block is attached to the outer wall of the arc-shaped plate, and the inclined surface block slides along a first sliding groove in the mounting cavity.

[0011] In a preferred embodiment of the wear-preventing tile for the H-shaped finned economizer tube described in the present invention, the transmission member includes an insertion rod, the insertion rod is mounted in a second sliding groove of the mounting cavity, the insertion rod is provided with a protrusion, a first spring is fitted to the outer wall of the insertion rod, a first limit slot is provided in the second sliding groove, and the protrusion moves along the first limit slot.

[0012] In a preferred embodiment of the wear-preventing tile for the H-shaped finned economizer tube described in the present invention, one end of the insertion rod is provided with a first inclined surface that contacts the inclined surface block via the first inclined surface, and the other end of the insertion rod is provided with a tapered plug.

[0013] In a preferred embodiment of the wear-preventing tile for the H-shaped finned economizer tube described in the present invention, the outer surfaces of the two parts of the protective shell are provided with racks on one side and tooth grooves on the other side, with gears provided inside the tooth grooves, and the rack of one part of the protective shell is inserted into the tooth groove of the other part of the protective shell.

[0014] In a preferred embodiment of the wear-preventing tile for the H-shaped finned economizer tube described in the present invention, a recess is provided on one side of the gear, the tapered plug is inserted into the recess, a lock rod is fixedly connected to the other side of the gear, the lock rod is inserted into a lock hole on the side of the tooth groove, and the tooth groove has a housing groove on the side facing the lock hole, and the gear is located within the housing groove.

[0015] In a preferred embodiment of the wear-preventing tile for the H-shaped finned economizer tube described in the present invention, the clamp plate is rotatably provided within the rotating cavity of the mounting cavity, the clamp plate is attached to the outlet of the rotating cavity by a rotating shaft, the clamp plate is provided with an inclined groove, a connecting rod is provided below the inclined surface block, and the connecting rod slides along the inclined groove.

[0016] In a preferred embodiment of the wear-preventing tile for the H-shaped finned economizer tube described in the present invention, two clamp plates are attached to the same rotating cavity, one above the other, and the two clamp plates are arranged symmetrically, and slots are provided in the plate body, and the clamp plates are clamped into the slots.

[0017] The beneficial effects of the present invention are as follows: The plate is fitted onto the outer wall of the tube to protect it, and the protective shell is fitted onto the outer wall of the fins such that the left and right portions of the same height are fitted simultaneously, the rack of one portion is inserted into the tooth groove of the other portion, and the extruded plate is pushed out by the outer wall of the tube, and the gear is moved by the transmission member and finally locked, the rack and tooth groove are locked, the two left and right portions of the protective shell are locked, and the movement of the extruded member causes the two clamp plates to rotate and close, snapping and locking into the central plate, thereby achieving the objective that the protective shell and plate as a whole provide comprehensive protection for the tube and each fin, enclosing and protecting the economizer member. [Brief explanation of the drawing]

[0018] To more clearly explain the technical solution in the embodiments of the present invention, the drawings used in the following description of the embodiments are briefly introduced below. Of course, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative efforts. [Figure 1] It is a schematic diagram showing the overall structure of the wear-resistant tile of the carbon-saving device tube with H-shaped fins according to the present invention. [Figure 2] It is a schematic diagram showing a partial structure of the protective shell in the wear-resistant tile of the carbon-saving device tube with H-shaped fins according to the present invention. [Figure 3] It is a schematic diagram showing the side structure of the wear-resistant tile of the carbon-saving device tube with H-shaped fins according to the present invention. [Figure 4] It is a schematic diagram showing the cross-sectional structure along the A-A direction in FIG. 3. [Figure 5] It is a schematic diagram showing the cross-sectional structure along the B-B direction in FIG. 3. [Figure 6] It is a schematic diagram showing the cross-sectional structure along the C-C direction in FIG. 3. [Figure 7] It is a schematic diagram enlarging the structure at D in FIG. 5. [Figure 8] It is a schematic diagram showing the plate structure in the wear-resistant tile of the carbon-saving device tube with H-shaped fins.

Modes for Carrying Out the Invention

[0019] To make the above objects, features, and advantages of the present invention clearer and easier to understand, the following will describe the specific embodiments of the present invention in detail in conjunction with the accompanying drawings of the accompanying drawings of the specification.

[0020] To facilitate a complete understanding of the present invention, many specific details are described below. However, the present invention can also be implemented in other ways different from those described in this specification, and those skilled in the art can make similar expansions without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0021] Also, as used herein, the term "one embodiment" or "embodiment" refers to specific features, structures, or characteristics that may be included in at least one embodiment of the present invention. The phrase "in one embodiment" appearing at different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selectively mutually exclusive embodiment from other embodiments.

[0022] Furthermore, when the present invention is described in detail in conjunction with schematic diagrams and the embodiments of the present invention are elaborated, for the sake of facilitating the explanation, the cross-sectional views showing the structure of the device are partially enlarged regardless of the normal scale, and moreover, the schematic diagrams are merely illustrative and do not limit the protection scope of the present invention. It should be noted that during actual production, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0023] Embodiment 1 Referring to FIG. 1, the first embodiment of the present invention provides an anti-wear tile for a carbon-saving device tube with H-shaped fins, including a carbon-saving device member 100 comprising a tube body 101 and a plurality of fins 102 attached to the outer wall of the tube body 101, with two fins 102 of the same height forming an H shape, and including a protection member 200 attached to the outer wall of the carbon-saving device member 100. The protection member 200 includes a bendable plate body 201 attached to the outer wall of the tube body 101 and a protection shell 202 fitted on the outer wall of the fin 102. Inside the protection shell 202, an extrusion member 203 adhered to the outer wall of the tube body 101 is provided. The extrusion member 203 locks the positions of two parts of the protection shell 202 inserted into each other at the same height by a transmission member 204, and drives a clamp plate 205 inside the protection shell 202 to snap against the outer wall of the plate body 201, locking the protection shell 202 and the plate body 201.

[0024] In this embodiment, the objective of protecting the outer wall of the economizer member 100 is achieved by fitting the protective member 200 to the outer wall of the pipe body 101 and the fin 102. Specifically, first, the plate body 201 is fitted to the outer wall of the pipe body 101, and then the protective shell 202 is fitted to the outer wall of the fin 102 such that the left and right portions of the same height are fitted simultaneously, the rack 202c of one portion is inserted into the tooth groove 202d of the other portion, and the extrusion member 203 is fitted to the outer wall of the fin 102 so that it is pushed out by the outer wall of the pipe body 101. Furthermore, the gear 204f is moved by the transmission member 204 and eventually locked, and because the gear 204f is between the rack 202c and the tooth groove 202d, the rack 202c and the tooth groove 202d are locked, and the two left and right parts of the protective shell 202 are locked, and as the extrusion member 203 moves, the two clamp plates 205 rotate and close, snapping and locking onto the central plate 201, thereby achieving the objective of enclosing and protecting the economizer member 100.

[0025] Example 2 Referring to Figures 2-8, the second embodiment of the present invention differs from the first embodiment in that it is a wear-preventing tile for an H-shaped finned carbonizer tube, and the plate body 201 is continuous. TIFF0007854515000002.tif5170 The fin has a letter shape and is composed of multiple horizontal plates 201a and one vertical plate 201b, with the fin 102 positioned between adjacent horizontal plates 201a.

[0026] When the plate body 201 is fitted to the outer wall of the pipe body 101, first, the gap between two adjacent horizontal plates 201a of the plate body 201 is aligned with the fins 102. Then, the two horizontal plates 201a at the same height are slowly twisted in on both sides along the outer wall of the pipe body 101, so that the horizontal plates 201a are attached to and fitted to the outer wall of the pipe body 101. The two horizontal plates 201a at the same height become flush, and as a result, the outer wall of the pipe body 101 to which the fins 102 are not attached is completely enclosed.

[0027] Example 3 Referring to Figures 2-8, a third embodiment of the present invention differs from the second embodiment in that it is an anti-wear tile for an H-shaped finned economizer tube, the protective shell 202 is divided into two parts, each part including a central cavity 202a and mounting cavities 202b on both sides, the fins 102 are housed in the cavity 202a, and two sets of the extrusion member 203, transmission member 204 and clamp plate 205 are provided, each positioned in two mounting cavities 202b. The extrusion member 203 includes an arc-shaped plate 203a attached to the outer wall of the plate body 201, an inclined surface block 203b attached to the outer wall of the arc-shaped plate 203a, and the inclined surface block 203b slides along a first sliding groove 202b-1 in the mounting cavity 202b. The transmission member 204 includes an insertion rod 204a, which is mounted in the second sliding groove 202b-2 of the mounting cavity 202b. The insertion rod 204a is provided with a projection 204b, a first spring 204c is fitted onto the outer wall of the insertion rod 204a, a first limit slot 202b-3 is provided in the second sliding groove 202b-2, and the projection 204b moves along the first limit slot 202b-3. One end of the insertion rod 204a is provided with a first inclined surface 204d, which contacts the inclined surface block 203b via the first inclined surface 204d, and the other end of the insertion rod 204a is provided with a tapered plug 204e.

[0028] The arc-shaped plate 203a is attached to the plate 201 on the outer wall of the pipe 101, and the arc-shaped plate 203a is pushed out by the pipe 101, driving the inclined surface block 203b inward together, and the inclined surface block 203b fits into the first inclined surface 204d at one end of the insertion rod 204a, thereby allowing the first inclined surface 204d, which is located in the first sliding groove 202b-1, to move outward, thereby allowing the first inclined surface 204d at one end to move outward. The insertion block provided with the first inclined surface 204d is moved outward, and the gear 204f is also moved. Simultaneously, due to the fitting of the first inclined surface 204d and the inclined surface block 203b, the insertion rod 204a moves in the reverse direction under the action of the first spring 204c, and the insertion rod 204a moves the inclined surface block 203b in the reverse direction by the first inclined surface 204d, causing the inclined surface block 203b to move outward, thereby causing the arc-shaped plate 203a to move outward and return to its original position.

[0029] Here, the outer surfaces of the two parts of the protective shell 202 are provided with racks 202c on one side and tooth grooves 202d on the other side, with a gear 204f provided inside the tooth grooves 202d, and the rack 202c of one part of the protective shell 202 is inserted into the tooth groove 202d of the other part of the protective shell 202. A recess 204f-1 is provided on one side of the gear 204f, and a tapered plug 204e is inserted into the recess 204f-1, and a lock rod 204g is fixedly connected to the other side of the gear 204f, and the lock rod 204g is inserted into a lock hole 202e on the side of the tooth groove 202d, and a housing groove 202f is provided on the side of the tooth groove 202d opposite the lock hole 202e, and the gear 204f is located inside the housing groove 202f.

[0030] Furthermore, a tapered locking block is provided at the end of the locking rod 204g closest to the gear 204f. The locking block is inserted into the locking hole 202e via the tapered shape, and when the locking block penetrates deeply, the keyway of the locking block and the locking hole 202e are engaged and locked, thereby preventing the rotation of the locking rod 204g. Conversely, when the locking rod 204g is pushed, the gear 204f moves in the opposite direction. After the locking rod 204g is pushed out of the locking hole 202, the locking rod 204g rotates while being pushed, causing the gear 204f to move and rotate, thereby unlocking the two protective shells 202 in opposite directions.

[0031] A housing groove 202f is provided at the end opposite the lock hole 202e, and the depth of the housing groove 202f is made smaller than the width of the gear 204f. As a result, when the gear 204f is housed there, a portion of the gear 204f still meshes with the tooth groove 202d. This allows the gear 204f to move left and right along the tooth groove 202d, always meshing with the tooth groove 202d, and also allowing it to mesh with the inserted rack 202c. Furthermore, a tapered plug 204e, which is rotatably provided at one end of the insertion rod 204a, is also located within the housing groove 202f. The tapered plug 204e is inserted into the recess 204f-1 and locked in the recess 204f-1. This allows the tapered plug 204e to push and move the gear 204f, and at the same time, the gear 204f can rotate the tapered plug 204e without affecting the insertion rod 204a.

[0032] In this embodiment, two protective shells 202 are selected and fitted to the outer walls of two fins 102 of the same height, respectively. When both protective shells 202 approach the pipe 101, the arc-shaped plate 203a on the extrusion member 203 is first attached to the outer wall of the pipe 101. Then, as the protective shells 202 continue to approach the pipe 101, both the arc-shaped plate 203a and the inclined surface block 203b are pushed out and move inward along the first sliding groove 202b-1, and the inclined surface As block 203b moves inward, it pushes out the first inclined surface 204d at the tip of insertion rod 204a, which is positioned in the second sliding groove 202b-2. This causes insertion rod 204a to push out the first spring 204c along the first limit slot 202b-3 by projection 204b, and the other end of insertion rod 204a is inserted into the tooth groove 202d of gear 204f by tapered plug 204e, and pushes gear 204f, causing it to move along the tooth groove 202d.

[0033] Furthermore, when the two left and right parts of the protective shell 202 are inserted into each other, the rack 202c of one part of the protective shell 202 is inserted into the tooth groove 202d of the other part of the protective shell 202. The insertion of the rack 202c causes the gear 204f to rotate, and the action of the gear 204f causes the rack 202c and the tooth groove 202d to move synchronously, thereby closing the two left and right parts of the protective shell 202 synchronously to the center, and the two left and right parts of the protective shell 202 to the outer wall of the pipe body 101. Once fully attached, the gear 204f is pushed from one side to the other of the rack 202c and tooth groove 202d, and the locking rod 204g on the other side of the gear 204f is inserted into the locking hole 202e and locks the locking rod 204g, thereby locking the gear 204f and preventing it from rotating. As a result, the rack 202c and tooth groove 202d located on its upper and lower surfaces become immobile, thereby locking the positions of the two left and right parts of the protective shell 202.

[0034] Example 4 Referring to Figures 2-8, the fifth embodiment of the present invention differs from the fourth embodiment in that it is a wear-preventing tile for an H-shaped finned economizer tube, and the clamp plate 205 is rotatably provided in the rotating cavity 202b-4 of the mounting cavity 202b, the clamp plate 205 is attached to the outlet of the rotating cavity 202b-4 by a rotating shaft, the clamp plate 205 is provided with an inclined groove 205a, a connecting rod 203c is provided below the inclined surface block 203b, and the connecting rod 203c slides along the inclined groove 205a. Two upper and lower clamp plates 205 are mounted in the same rotating cavity 202b-4, and the two clamp plates 205 are provided symmetrically, the plate body 201 is provided with a slot 201c, and the clamp plate 205 is clamped in the slot 201c.

[0035] Furthermore, the two clamp plates 205 within the same rotating cavity 202b-4 are connected to each other via a rotating shaft, forming a clip shape as a whole. Each clamp plate 205 is provided with an inclined groove 205a, and the two inclined grooves 205a are inclined in opposite directions. The connecting rod 203c passes through the two inclined grooves 205a and moves along the two inclined grooves 205a. As a result, when the inclined surface block 203b drives the connecting rod 203c to move along the first sliding groove 202b-1, the connecting rod 203c moves within the two inclined grooves 205a to control the rear ends of the two clamp plates 205, thereby allowing the tips of the two clamp plates 205 to clamp the outer wall of the plate body 201.

[0036] In this embodiment, when the two left and right portions of the protective shell 202 are inserted synchronously into the central tube 101, the arc-shaped plates 203a of the two left and right portions of the protective shell 202 are pushed out by the outer wall of the tube 101 and slowly move inward. As the arc-shaped plates 203a move inward, the inclined surface block 203b is also driven to move inward along the first sliding groove 202b-1. The movement of the inclined surface block 203b causes the connecting rod 203c to move, and the connecting rod 203c moves within the inclined grooves 205a of the two clamp plates 205. As a result, the two clamp plates 205 rotate around the pivot axis at their tips, and the two clamp plates 205 are clamped to the outer wall of the plate body 201. The clamp plates 205 are also snapped into slots 201c and lock to the outer wall of the plate body 201, thus achieving locking between the protective shell 202 and the plate body 201.

[0037] It should be noted that the structures and arrangements shown in the multiple different exemplary embodiments of this application are for illustrative purposes only. While only a few embodiments are described in detail in this disclosure, it should be readily apparent to anyone referring to this disclosure that many modifications are possible (e.g., changes in the dimensions, scale, structure, shape and proportions of various elements, parameter values ​​such as temperature and pressure, mounting arrangement, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and merits of the subject matter described herein. For example, elements shown as integrally formed may consist of multiple parts or elements, the positions of elements may be reversed or otherwise altered, and the properties, number or position of separate elements may be changed. Thus, all such variations are included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any “apparatus + function” clause refers to a structure that performs the function described herein and is intended to be not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, changes and omissions may be made in the design, operation and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to any particular embodiment, but extends to various modifications that fall within the scope of the appended claims. Furthermore, in order to provide a concise description of exemplary embodiments, it is not necessary to describe all features of the actual embodiments (i.e., features that are not relevant to the best mode of carrying out the present invention or features that are not relevant to realizing the present invention).

[0038] The above-described embodiments are merely for illustrating the technical solutions of the present invention and do not limit them. While the present invention has been described in detail with reference to preferred embodiments, those skilled in the art can modify or substitute equivalents to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and such modifications or substitutions should be included within the claims of the present invention.

Claims

1. A wear-preventing tile for an H-shaped finned economizer tube, which includes an economizer member (100) comprising a tubular body (101) and a plurality of fins (102) attached to the outer wall of the tubular body (101) and of the same height forming an H shape, comprising a protective member (200) attached to the outer wall of the economizer member (100), wherein the protective member (200) comprises a plate (201) attached to the outer wall of the tubular body (101) and a protective shell (202) fitted to the outer wall of the fins (102), and the protective shell The wear-preventing tile for the H-shaped finned economizer tube is characterized in that an extruded member (203) is provided inside (202) that fits into the outer wall of the tube (101), the extruded member (203) locks the positions of two parts of the protective shell (202) that are inserted into each other at the same height by a transmission member (204), and drives a clamp plate (205) inside the protective shell (202) to snap against the outer wall of the plate (201), thereby locking the protective shell (202) and the plate (201).

2. The wear-preventing tile for an H-shaped finned economizer tube according to Claim 1, characterized in that the protective shell (202) is divided into two parts, and each part includes a central cavity (202a) and mounting cavities (202b) on both sides, and the fin (102) is housed in the cavity (202a).

3. The wear prevention tile for an H-shaped finned economizer tube according to Claim 2, characterized in that two sets of the extruded member (203), the transmission member (204), and the clamp plate (205) are all provided and each is arranged in two of the mounting cavities (202b).

4. The wear-preventing tile for an H-shaped finned economizer tube according to claim 3, characterized in that the extruded member (203) includes an arc-shaped plate (203a) attached to the outer wall of the plate body (201), an inclined surface block (203b) is attached to the outer wall of the arc-shaped plate (203a), and the inclined surface block (203b) slides along a first sliding groove (202b-1) in the mounting cavity (202b).

5. The wear prevention tile for an H-shaped finned economizer tube according to claim 4, characterized in that the transmission member (204) includes an insertion rod (204a), the insertion rod (204a) is installed in a second sliding groove (202b-2) of the mounting cavity (202b), the insertion rod (204a) is provided with a protrusion (204b), a first spring (204c) is fitted onto the outer wall of the insertion rod (204a), a first limit slot (202b-3) is provided in the second sliding groove (202b-2), and the protrusion (204b) moves along the first limit slot (202b-3).

6. A wear-preventing tile for an H-shaped finned economizer tube according to claim 5, characterized in that one end of the insertion rod (204a) is provided with a first inclined surface (204d) which contacts the inclined surface block (203b) via the first inclined surface (204d), and the other end of the insertion rod (204a) is provided with a tapered plug (204e).

7. The wear-preventing tile for an H-shaped finned economizer tube according to claim 6, characterized in that the outer surfaces of the two parts of the protective shell (202) are provided with racks (202c) on one side and tooth grooves (202d) on the other side, a gear (204f) is provided inside the tooth grooves (202d), and the racks (202c) of one part of the protective shell (202) are inserted into the tooth grooves (202d) of the other part of the protective shell (202).

8. A wear-preventing tile for an H-shaped finned economizer tube according to claim 7, characterized in that a recess (204f-1) is provided on one side of the gear (204f), the tapered plug (204e) is inserted into the recess (204f-1), a lock rod (204g) is fixedly connected to the other side of the gear (204f), the lock rod (204g) is inserted into a lock hole (202e) on the side of the tooth groove (202d), and the tooth groove (202d) is provided with a housing groove (202f) on the side facing the lock hole (202e), and the gear (204f) is located within the housing groove (202f).

9. The clamp plate (205) is rotatably provided within the rotating cavity (202b-4) of the mounting cavity (202b), the clamp plate (205) is attached to the exit of the rotating cavity (202b-4) by a rotating shaft, the clamp plate (205) is provided with an inclined groove (205a), a connecting rod (203c) is provided below the inclined surface block (203b), and the connecting rod (203c) slides along the inclined groove (205a), characterized in that the wear prevention tile for an H-shaped finned economizer tube according to claim 8.

10. The wear prevention tile for an H-shaped finned economizer tube according to claim 9, characterized in that two clamp plates (205) are attached to the same rotating cavity (202b-4), the two clamp plates (205) are arranged symmetrically, a slot (201c) is provided in the plate body (201), and the clamp plates (205) are clamped into the slot (201c).

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