Economizer with wear-resistant protection effect for hot water boiler

Abstract

The application discloses a coal economizer with wear-resistant protection effect for a hot water boiler and relates to the technical field of boiler design and production. The coal economizer comprises a steel frame, a heat exchange tube bundle is arranged in the steel frame, water inlet pipes and water outlet pipes are arranged on the heat exchange tube bundle, fins are arranged on the surface of the heat exchange tube bundle, the fins are used for expanding the contact area of flue gas and the heat exchange tube bundle, high-temperature flue gas directly contacts the heat exchange tube bundle to exchange heat, the fins arranged on the surface of the heat exchange tube bundle can effectively expand the contact area of flue gas and the heat exchange tube bundle, heat transfer is more sufficient, a gap channel with uniform size is formed, and particles larger than a preset size in flue gas can be continuously intercepted, and thus the service life of the surface coating of the heat exchange tube bundle is prolonged, and a basic guarantee is provided for subsequent efficient heat exchange.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boiler design and production, in particular to a coal economizer with wear-resistant protection effect for hot water boiler. BACKGROUND

[0002] The coal economizer for hot water boiler is an energy-saving device that recovers waste heat in the tail flue of the boiler and transfers the heat to the boiler feed water to improve the thermal efficiency of the boiler.

[0003] The patent with patent announcement number CN212842253U relates to a coal economizer hanging installation assembly of a hot water boiler, which includes a high-temperature coal economizer and a top header arranged outside the top plate of the boiler. A hanging pipe that is in communication with the top header and is filled with flowing water extends into the flue of the hot water boiler after passing through the top plate of the boiler. The bottom end of the hanging pipe is not higher than the bottom end of the high-temperature coal economizer, and the heat exchange pipe group of the high-temperature coal economizer is installed on the hanging pipe. The coal economizer hanging installation assembly effectively solves the problem of deformation and inclination of the high-temperature coal economizer caused by the current hanging method. The patent also discloses a hot water boiler using the above-mentioned coal economizer hanging installation assembly.

[0004] In the above-mentioned patent, the deformation and inclination problems of the traditional hanging method coal economizer are effectively solved by targeted design. However, in the hot water boiler system, the coal economizer needs to be in direct contact with the high-temperature flue gas discharged from the boiler through the heat exchange tube bundle to realize heat exchange. The boiler flue gas usually contains a certain amount of large particles. These particles move with the high-speed flue gas and continuously scour the surface of the heat exchange tube bundle, directly wearing the coating on the surface of the heat exchange tube bundle. Not only will this accelerate the wear of the heat exchange tube bundle itself, but also will cause the heat exchange efficiency to decrease due to the failure of the coating protection. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a coal economizer with wear-resistant protection effect for hot water boiler, which solves the problems raised in the above background.

[0006] In order to achieve the above object, the present application is realized by the following technical scheme: A coal economizer with wear-resistant protection effect for hot water boiler, comprising a steel frame, a heat exchange tube bundle is arranged in the steel frame, a water inlet pipe and a water outlet pipe are arranged on the heat exchange tube bundle, fins are arranged on the surface of the heat exchange tube bundle, the fins are used to expand the contact area of flue gas and the heat exchange tube bundle, high-temperature flue gas directly contacts the heat exchange tube bundle for heat exchange, the fins arranged on the surface can effectively expand the contact area of flue gas and the heat exchange tube bundle, and heat transfer is more sufficient, and the coal economizer further comprises: a smoke inlet pipe, the smoke inlet pipe is fixedly installed at the top of the steel frame, the smoke inlet pipe is connected with the smoke exhaust port of the hot water boiler, and a maintenance opening is formed in the outer wall of the smoke inlet pipe; an E-shaped bracket, the E-shaped bracket is fixedly installed on the inner wall of the smoke inlet pipe, and a sliding groove is formed in the surface of the E-shaped bracket; a pull-out plate, the pull-out plate is in contact with the sliding groove, and the pull-out plate slides on the surface of the E-shaped bracket along the sliding groove; a sealing cover plate, the sealing cover plate is fixedly installed on the outer wall of the side of the pull-out plate away from the E-shaped bracket, the size of the sealing cover plate is matched with the maintenance opening, and the sealing cover plate is used for sealing the maintenance opening to ensure the sealing performance of the flue gas flow path; a plurality of supporting strips, the plurality of supporting strips are fixedly installed on the inner wall of the pull-out plate; a plurality of wear-resistant baffles, the plurality of wear-resistant baffles are fixedly installed on the circumferential surface of the supporting strips, the wear-resistant baffles are arranged in a "V" shape, the wear-resistant baffles directly bear the impact of high-temperature flue gas, and the supporting strips below provide stable support for the wear-resistant baffles.

[0007] According to the above technical scheme, one side of the E-shaped bracket close to the sealing cover plate is provided with an internal thread blind hole, a corresponding position of the sealing cover plate is provided with an internal thread through hole, and the E-shaped bracket and the sealing cover plate are fixedly connected through bolts.

[0008] According to the above technical scheme, the plurality of wear-resistant baffles are equidistantly installed on the supporting strips, the same gap is formed between adjacent wear-resistant baffles, the gap is used for airflow, and the size of the gap formed by the wear-resistant baffles only allows particles meeting the size requirements to pass through.

[0009] According to the above technical scheme, the surface of the E-shaped bracket of the pull-out plate is provided with a moving groove, the outer wall of the pull-out plate is fixedly installed with a long strip plate, the two ends of the long strip plate are provided with arc surfaces, the long strip plate is in contact with the moving groove, the pull-out plate drives the long strip plate to slide outward along the moving groove, and the pull-out plate and the long strip plate are completely separated from the E-shaped bracket.

[0010] According to the technical scheme, the E-shaped bracket is provided with a loading and unloading auxiliary device for assisting loading and unloading of the pull-out plate, and is also provided with a anti-shaking stability device for improving stability of the pull-out plate; the loading and unloading auxiliary device comprises a bearing plate, a mounting plate and a buffer pad, the bearing plate is fixedly installed on a surface of the E-shaped bracket, the mounting plate is fixedly installed on one side of the bearing plate close to the pull-out plate, the buffer pad is fixedly installed on a surface of the mounting plate, the buffer pad is in contact with an outer side wall of the pull-out plate, and the pull-out plate is separated from the buffer pad during sliding of the pull-out plate along the sliding groove.

[0011] According to the technical scheme, a mounting groove is formed in the surface of the bearing plate; a convex frame is fixedly installed in the mounting groove; a round sliding block is slidingly installed in the convex frame; a compression spring is arranged between the convex frame and the round sliding block; a linkage block is fixedly installed on one side of the round sliding block away from the compression spring; a recess is formed in one side of the linkage block close to the long strip plate; and an arc surface of one end of the long strip plate is in contact with the recess, and the long strip plate continuously slides to exert a radial thrust on the linkage block, and the linkage block is displaced towards the convex frame under the thrust.

[0012] According to the technical scheme, the anti-shaking stability device comprises a mounting seat, a hollow pipe, a cylindrical rod and a rubber ring, the linkage block is in contact with the rubber ring, the rubber ring absorbs the impact force generated by displacement of the linkage block through elastic deformation of the rubber ring, the mounting seat is fixedly installed on a surface of the E-shaped bracket, the hollow pipe is fixedly installed on an outer wall of the mounting seat, the cylindrical rod is slidingly installed on an inner wall of the hollow pipe, the cylindrical rod is fixedly connected with the linkage block, and the linkage block is displaced, and the cylindrical rod is displaced synchronously, and the rubber ring is fixedly installed on one side of the hollow pipe close to the linkage block.

[0013] According to the technical scheme, a circumferential surface of the cylindrical rod is fixedly installed with an elastic rubber sleeve, an outer wall of the mounting seat is fixedly installed with a connecting pipe, a through groove is formed in a surface of the connecting pipe, the through groove gradually increases in diameter from one end close to the hollow pipe to the other end, the elastic rubber sleeve is in contact with an inner wall of the through groove, and the elastic rubber sleeve in the deformed state is tightly in contact with the inner wall of the through groove, so that stability of the cylindrical rod after reaching the specified position is improved.

[0014] The application provides a coal economizer with wear-resistant protection effect for hot water boiler.

[0015] (1) The economizer with wear-resistant protection effect for hot water boiler, the wear-resistant baffle guides the flue gas to the two sides, effectively slows down the flow rate of the flue gas, and forms a protection area by arranging the wear-resistant baffle in the windward direction of the heat exchange tube bundle, which can effectively weaken the impact force and flow rate of the flue gas, thereby reducing the wear of the heat exchange tube bundle surface caused by high-speed flue gas scouring, and the gap size formed by the wear-resistant baffle only allows particles meeting the size requirements to pass through, and by forming a gap channel with uniform size, the particles larger than the preset size in the flue gas can be continuously intercepted, thereby prolonging the service life of the surface coating of the heat exchange tube bundle and providing a basic guarantee for subsequent efficient heat exchange.

[0016] (2) The economizer with wear-resistant protection effect for hot water boiler smoothly pulls the sealing cover plate outward, so that the sealing cover plate drives the pull-out plate to slide outward along the sliding groove, and the pull-out plate drives the long strip plate to slide outward along the moving groove, the sliding type mounting and dismounting operation reduces the dismounting difficulty of the pull-out plate, and the long strip plate increases the contact area of the pull-out plate and the E-shaped bracket, thereby effectively improving the stability of the pull-out plate after installation.

[0017] (3) The economizer with wear-resistant protection effect for hot water boiler applies controllable thrust to the long strip plate in the contact state through the linkage block, until the compression spring completes recovery, the elastic auxiliary thrust provided by the compression spring can effectively reduce the labor consumption of the workers, shorten the dismounting time of single maintenance, and thereby improve the overall maintenance efficiency, and the compression spring in the deformed state generates a reverse elastic damping force on the round block, which slows down the sliding speed of the long strip plate and the pull-out plate, and through the preliminary buffering of the buffer pad and the damping secondary buffering of the compression spring, effective protection is formed, which can not only ensure that the pull-out plate is stably positioned to the installation position, but also prevent hard collision during installation.

[0018] (4) The economizer with wear-resistant protection effect for hot water boiler provides additional radial support force for the linkage block through the cylindrical rod, prevents the linkage block from shaking during displacement or static placement, and through the guidance and support of the hollow pipe, the position deviation of the linkage block in the environment subjected to long-term flue gas impact can be effectively prevented, thereby providing reliable protection for the precise butt joint of the long strip plate and the linkage block, and the deformed elastic sleeve is tightly fitted with the inner wall of the through groove, thereby improving the stability of the cylindrical rod in the specified position, through the design of the through groove, it is ensured that the elastic sleeve can be tightly fitted with the inner wall of the through groove, the working shaking of the linkage block and the cylindrical rod is inhibited, the stability of the E-shaped bracket is ensured, and reliable wear-resistant protection is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0020] Figure 2 It is a schematic diagram of the heat exchange tube bundle structure of the present application;

[0021] Figure 3It is the bottom structure schematic diagram of the smoke inlet pipeline of the application;

[0022] Figure 4 It is the E-shaped bracket structure schematic diagram of the application;

[0023] Figure 5 It is the Figure 4 enlarged structure schematic diagram of A in the application;

[0024] Figure 6 It is the long strip plate position structure schematic diagram of the application;

[0025] Figure 7 It is the linkage block and cylindrical rod structure schematic diagram of the application;

[0026] Figure 8 It is the convex frame position structure schematic diagram of the application;

[0027] Figure 9 It is the convex frame internal structure schematic diagram of the application;

[0028] Figure 10 It is the cylindrical rod position structure schematic diagram of the application.

[0029] In the figure: 1, steel frame; 2, heat exchange tube bundle; 3, fin; 4, smoke inlet pipeline; 5, E-shaped bracket; 6, pull plate; 7, sealing cover plate; 8, support strip; 9, wear-resistant baffle; 10, long strip plate; 21, bearing plate; 22, mounting plate; 23, buffer pad; 24, convex frame; 25, round smooth block; 26, compression spring; 27, linkage block; 31, carrying seat; 32, hollow pipe; 33, cylindrical rod; 34, rubber ring; 35, elastic rubber sleeve; 36, connecting pipe. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0031] Please refer to Figure 1 - Figure 10One embodiment of the present application is: a economizer with wear-resistant protection effect for hot water boiler, including steel frame 1, the inside of steel frame 1 is provided with heat exchange tube bundle 2, heat exchange tube bundle 2 is provided with water inlet pipe and water outlet pipe, the surface of heat exchange tube bundle 2 is provided with fin 3, fin 3 is used to expand the contact area of flue gas and heat exchange tube bundle 2, still include: smoke inlet pipe 4, smoke inlet pipe 4 is fixedly installed at the top of steel frame 1, smoke inlet pipe 4 is connected with the smoke outlet of hot water boiler, the outer wall of smoke inlet pipe 4 is provided with access hole;E-shaped bracket 5, E-shaped bracket 5 is fixedly installed on the inner wall of smoke inlet pipe 4, the surface of E-shaped bracket 5 is provided with sliding groove;Pull-out plate 6, pull-out plate 6 is in contact with sliding groove, pull-out plate 6 slides on the surface of E-shaped bracket 5 along sliding groove;Sealing cover plate 7, sealing cover plate 7 is fixedly installed on the outer wall of pull-out plate 6 away from E-shaped bracket 5, the size of sealing cover plate 7 is adapted to access hole, sealing cover plate 7 is used to close access hole to guarantee the sealing property of flue gas flow path;Several support strips 8, several support strips 8 are fixedly installed on the inner wall of pull-out plate 6;Several wear-resistant baffle plates 9, several wear-resistant baffle plates 9 are fixedly installed on the circumference of support strip 8, the shape of wear-resistant baffle plate 9 is set as "V", by setting wear-resistant baffle plate 9 in the wind direction to form protection zone, the impact intensity and flow velocity of flue gas can be effectively weakened, thereby reducing the wear and tear caused by high-speed flue gas scouring on the surface of heat exchange tube bundle 2.

[0032] The side of E-shaped bracket 5 close to sealing cover plate 7 is provided with internal thread blind hole, sealing cover plate 7 is provided with internal thread through hole at the corresponding position, E-shaped bracket 5 and sealing cover plate 7 are fixedly connected through bolt, the danger such as overflow of flue gas in smoke inlet pipe 4 is prevented by fixing through bolt.

[0033] Several wear-resistant baffle plates 9 are installed equidistantly on support strip 8, the same gap is formed between adjacent wear-resistant baffle plates 9, the gap is used for airflow, by forming gap channel with uniform size, the particulate matter greater than preset size in flue gas can be continuously intercepted, thereby prolonging the service life of surface coating of heat exchange tube bundle 2, providing basic guarantee for subsequent efficient heat exchange.

[0034] The surface of E-shaped bracket 5 of pull-out plate 6 is provided with moving groove, the outer wall of pull-out plate 6 is fixedly installed with long strip plate 10, the both ends of long strip plate 10 are provided with arc surface, long strip plate 10 is in contact with moving groove, by sliding type mounting and dismounting operation, the dismounting difficulty of pull-out plate 6 is reduced, and the contact area of pull-out plate 6 and E-shaped bracket 5 is increased by long strip plate 10, the stability of pull-out plate 6 after installation is effectively improved.

[0035] In the working process of the embodiment, high-temperature flue gas is discharged from the flue gas discharge port of the hot water boiler, enters the inside of the steel frame 1 under the guidance of the flue gas inlet pipe 4, and exchanges heat with the heat exchange tube bundle 2. The fins 3 arranged on the surface of the heat exchange tube bundle 2 can effectively expand the contact area of the flue gas and the heat exchange tube bundle 2, so that the heat transfer is more sufficient, and the heat exchange efficiency is improved. During the heat exchange process, cold water continuously flows into the heat exchange tube bundle 2 from the water inlet, exchanges heat with the high-temperature flue gas outside the tube, and the water temperature gradually rises. At the same time, the low-temperature flue gas that has completed heat transfer is discharged from the bottom of the steel frame 1 and enters the subsequent processing process, and the hot water in the heat exchange tube bundle 2 flows out from the water outlet to meet the subsequent heat demand;

[0036] In the process of guiding the flue gas by the flue gas inlet pipe 4, the flue gas first contacts the several wear-resistant baffles 9 above the heat exchange tube bundle 2. The wear-resistant baffles 9 directly bear the impact of the high-temperature flue gas, and the support bars 8 below provide stable support for the wear-resistant baffles 9 to ensure the reliability of the structure. Under the guidance of the wear-resistant baffles 9, the flue gas will be divided into two sides along the triangular slope at the top of the wear-resistant baffles 9, effectively slowing down the flow rate of the flue gas. Subsequently, the flue gas smoothly passes through the gap between adjacent wear-resistant baffles 9 and then contacts and exchanges heat with the heat exchange tube bundle 2 below. By arranging the wear-resistant baffles 9 in the windward direction of the heat exchange tube bundle 2 to form a protection zone, the impact force and flow rate of the flue gas can be effectively weakened, thereby reducing the wear of the surface of the heat exchange tube bundle 2 caused by the high-speed impact of the flue gas.

[0037] During the process of the flue gas flowing through the gap between adjacent wear-resistant baffles 9, the gap formed by the wear-resistant baffles 9 is only allowed to pass particles meeting the size requirements. For particles larger than the preset size in the flue gas, the gap cannot be passed and is effectively blocked between the two adjacent wear-resistant baffles 9, so as to avoid the larger particles from impacting the heat exchange tube bundle 2 with the flue gas. By forming a gap channel with uniform size, the particles larger than the preset size in the flue gas can be continuously intercepted, thereby prolonging the service life of the surface coating of the heat exchange tube bundle 2 and providing a basic guarantee for subsequent efficient heat exchange.

[0038] When the wear-resistant baffle 9 is maintained, first, the hot water boiler high-temperature flue gas is stopped, the inside of the flue gas inlet pipe 4 is ensured to be completely emptied, the temperature is reduced to a safe range, then the bolts for fixing the sealing cover plate 7 and the E-shaped bracket 5 are unscrewed, the fixing relationship between the sealing cover plate 7 and the E-shaped bracket 5 is released, after the bolts are removed, the sealing cover plate 7 is smoothly pulled outwards, so that the pull-out plate 6 is driven to slide outwards along the sliding groove, in this process, the pull-out plate 6 synchronously drives the supporting strip 8 and the wear-resistant baffle 9 to displace outwards, at the same time, the pull-out plate 6 also drives the long strip plate 10 to slide outwards along the moving groove, until the pull-out plate 6 and the long strip plate 10 are completely separated from the E-shaped bracket 5, the pull-out plate 6 can be quickly removed, and then the subsequent maintenance work is carried out; after the maintenance work is completed, the pull-out plate 6 is aligned with the sliding groove of the E-shaped bracket 5, at the same time, the long strip plate 10 is aligned with the moving groove, the sealing cover plate 7 is smoothly pushed, so that the pull-out plate 6 and the long strip plate 10 are smoothly slid into the corresponding grooves, until the sealing cover plate 7 completely blocks the maintenance opening, finally, the bolts are screwed, the fixing of the sealing cover plate 7 and the E-shaped bracket 5 is completed, through the sliding type mounting and dismounting operation, the mounting and dismounting difficulty of the pull-out plate 6 is reduced, and the long strip plate 10 increases the contact area between the pull-out plate 6 and the E-shaped bracket 5, so that the stability of the pull-out plate 6 after installation is effectively improved.

[0039] Please refer to Figure 1 - Figure 10 On the basis of the above embodiment, in another embodiment of the present application, the E-shaped bracket 5 is provided with a mounting and dismounting auxiliary device for assisting the mounting and dismounting of the pull-out plate 6, and the E-shaped bracket 5 is also provided with a anti-shaking stability device for improving the stability of the pull-out plate 6; the mounting and dismounting auxiliary device comprises a bearing plate 21, a mounting plate 22 and a buffer pad 23, the bearing plate 21 is fixedly installed on the surface of the E-shaped bracket 5, the mounting plate 22 is fixedly installed on one side of the bearing plate 21 close to the pull-out plate 6, and the buffer pad 23 is fixedly installed on the surface of the mounting plate 22, the buffer pad 23 is attached to the outer side wall of the pull-out plate 6, by setting the buffer pad 23, part of the impact force is absorbed by the elasticity of the buffer pad 23, and the sliding speed of the pull-out plate 6 is preliminarily reduced.

[0040] A mounting groove is formed in the surface of the bearing plate 21, a convex frame 24 is fixedly installed in the inside of the mounting groove, a round sliding block 25 is slidably installed in the inside of the convex frame 24, a compression spring 26 is arranged between the convex frame 24 and the round sliding block 25, a linkage block 27 is fixedly installed on the side of the round sliding block 25 away from the compression spring 26, a recess is formed in the side of the linkage block 27 close to the long strip plate 10, and the one end arc surface of the long strip plate 10 is in contact with the recess; through the preliminary buffering of the buffer pad 23 and the damping secondary buffering of the compression spring 26, effective protection is formed, which can not only ensure that the pull-out plate 6 is smoothly positioned to the mounting position, but also prevent hard collision during the mounting process.

[0041] The anti-shaking stabilizing device comprises a mounting seat 31, a hollow tube 32, a cylindrical rod 33 and a rubber ring 34, the mounting seat 31 is fixedly installed on the surface of the E-shaped bracket 5, the hollow tube 32 is fixedly installed on the outer wall of the mounting seat 31, the cylindrical rod 33 is slidingly installed on the inner wall of the hollow tube 32, the cylindrical rod 33 is fixedly connected with the linkage block 27, the rubber ring 34 is fixedly installed on one side of the hollow tube 32 close to the linkage block 27, and through the guidance and support of the hollow tube 32, the position deviation of the linkage block 27 in the environment subjected to the smoke impact for a long time can be effectively prevented, and reliable guarantee for the accurate butt joint of the long strip plate 10 and the linkage block 27 is provided.

[0042] The outer wall of the mounting seat 31 is fixedly installed with a connecting pipe 36, the surface of the connecting pipe 36 is provided with a through groove, one end of the through groove close to the hollow tube 32 gradually increases in diameter to the other end, the elastic rubber sleeve 35 is attached to the inner wall of the through groove, through the design of the through groove, the elastic rubber sleeve 35 can be closely attached to the inner wall of the through groove, the working shaking of the linkage block 27 and the cylindrical rod 33 is inhibited, the stability of the E-shaped bracket 5 is guaranteed, and reliable wear protection is realized.

[0043] During the sliding process of the pull-out plate 6 along the sliding groove, the pull-out plate 6 is out of contact with the buffer pad 23, and the long strip plate 10 is driven to slide outward along the moving groove, and with the movement of the long strip plate 10, the radial pushing force applied by the long strip plate 10 to the linkage block 27 gradually weakens, at this time, the compression spring 26 in the deformed state releases the elastic potential energy to recover, and in the recovery process, the compression spring 26 drives the smooth block 25 to slide away from the convex frame 24, and the smooth block 25 drives the linkage block 27 to displace synchronously, so that the linkage block 27 applies a controllable pushing force to the long strip plate 10 still in contact, until the compression spring 26 completes the recovery, at this time, the long strip plate 10 continues to slide and is completely out of contact with the linkage block 27, and through the elastic auxiliary pushing force provided by the compression spring 26, the human consumption of the workers can be effectively reduced, the disassembly and assembly time of single maintenance is shortened, and the overall maintenance efficiency is improved;

[0044] When the pull-out plate 6 is sliding along the sliding groove, when the pull-out plate 6 approaches the installation end point, it first contacts the buffer pad 23, and the impact force generated at the moment of contact forces the buffer pad 23 to elastically deform. The deformed buffer pad 23 absorbs part of the impact force through its own elasticity, preliminarily slowing down the sliding speed of the pull-out plate 6. At the same time, the pull-out plate 6 synchronously drives the long strip plate 10 to slide inward along the moving groove. As the long strip plate 10 continues to slide, its edge gradually contacts the groove of the linkage block 27, thereby exerting a radial pushing force on the linkage block 27. Under the action of the pushing force, the linkage block 27 displaces towards the convex frame 24, and drives the round block 25 to slide in the convex frame 24. The round block 25 extrudes the compression spring 26 during the sliding process, forcing the compression spring 26 to deform. The deformed compression spring 26 generates an opposite elastic damping force on the round block 25, further slowing down the sliding speed of the long strip plate 10 and the pull-out plate 6. Through the preliminary buffering of the buffer pad 23 and the secondary buffering of the damping of the compression spring 26, effective protection is formed, which can not only ensure that the pull-out plate 6 is positioned smoothly to the installation position, but also prevent hard collision during installation;

[0045] When the linkage block 27 displaces away from the convex frame 24, it will synchronously exert a pushing force on the cylindrical rod 33, pushing the cylindrical rod 33 and the elastic rubber sleeve 35 to displace away from the convex frame 24. During the displacement process, the linkage block 27 first contacts the rubber ring 34, which absorbs the impact force generated by the displacement of the linkage block 27 through its own elastic deformation, slowing down the movement speed of the linkage block 27 and ensuring its smooth stop at the preset position. At the same time, as the cylindrical rod 33 moves, the elastic rubber sleeve 35 gradually comes out of contact with the through groove of the adapter pipe 36. After coming out of contact, the elastic rubber sleeve 35 gradually recovers under the action of its own elastic restoring force, while the cylindrical rod 33 slides along the hollow pipe 32, which provides continuous and stable guidance and support for it, ensuring that the sliding trajectory of the cylindrical rod 33 does not deviate. The cylindrical rod 33 provides additional radial support force for the linkage block 27, enhancing the stability of the linkage block 27 and preventing it from shaking during displacement or static state. Through the guidance and support of the hollow pipe 32, the position deviation of the linkage block 27 in the environment subjected to long-term smoke impact can be effectively prevented, providing reliable protection for the precise butt joint of the long strip plate 10 and the linkage block 27;

[0046] When the linkage block 27 is displaced towards the convex frame 24, it will simultaneously apply a pulling force to the cylindrical rod 33, driving the cylindrical rod 33 and the elastic rubber sleeve 35 to displace towards the convex frame 24. During the displacement process, the cylindrical rod 33 always provides stable radial support force for the linkage block 27, and the elastic rubber sleeve 35 will gradually come into contact with the through slot of the adapter pipe 36. Since the inner wall size of the through slot gradually decreases from large to small, when the elastic rubber sleeve 35 enters the through slot, the gradually changing inner wall will extrude the elastic rubber sleeve 35, forcing the elastic rubber sleeve 35 to adaptively deform. The deformed elastic rubber sleeve 35 will tightly fit with the inner wall of the through slot, thereby improving the stability of the cylindrical rod 33 after reaching the designated position, effectively inhibiting the slight shaking during the working process. Through the design of the through slot, it is ensured that the elastic rubber sleeve 35 can tightly fit with the inner wall of the through slot, inhibiting the working shaking of the linkage block 27 and the cylindrical rod 33, ensuring the stability of the E-shaped bracket 5 as a whole, and realizing reliable wear-resistant protection.

[0047] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An economizer with wear-resistant protection effect for hot water boilers, comprising a steel frame (1), characterized in that, The inside of the steel frame (1) is provided with a heat exchange tube bundle (2), the heat exchange tube bundle (2) is provided with an inlet pipe and an outlet pipe, the surface of the heat exchange tube bundle (2) is provided with fins (3), the fins (3) are used for expanding the contact area of flue gas and the heat exchange tube bundle (2), and the steel frame (1) is further provided with: The flue gas inlet pipe (4) is fixedly installed at the top of the steel frame (1), the flue gas inlet pipe (4) is connected with the flue gas outlet of the hot water boiler, and the outer wall of the flue gas inlet pipe (4) is provided with an access hole; The E-shaped bracket (5) is fixedly installed on the inner wall of the flue gas inlet pipe (4), and the surface of the E-shaped bracket (5) is provided with a sliding groove; The pull-out plate (6) is in contact with the sliding groove, and the sliding groove is used for sliding of the pull-out plate (6) on the surface thereof; The sealing cover plate (7) is fixedly installed on the outer wall of the pull-out plate (6) away from the E-shaped bracket (5), the size of the sealing cover plate (7) is matched with the access hole, and the sealing cover plate (7) is used for closing the access hole to guarantee the sealing performance of the flue gas flow path; A plurality of support strips (8) are fixedly installed on the inner wall of the pull-out plate (6); A plurality of wear-resistant baffle plates (9) are fixedly installed on the circumferential surface of the support strip (8), and the wear-resistant baffle plate (9) is in the shape of "V"; A plurality of wear-resistant baffle plates (9) are equidistantly installed on the support strip (8), adjacent wear-resistant baffle plates (9) form gaps with the same spacing, and the gaps are used for airflow passing through; The surface of the E-shaped bracket (5) of the pull-out plate (6) is provided with a moving groove, the outer wall of the pull-out plate (6) is fixedly installed with a long strip plate (10), both ends of the long strip plate (10) are provided with arc surfaces, and the long strip plate (10) is in contact with the moving groove; The E-shaped bracket (5) is provided with a loading and unloading auxiliary device for assisting loading and unloading of the pull-out plate (6), and the E-shaped bracket (5) is further provided with an anti-shaking stability device for improving the stability of the pull-out plate (6); The loading and unloading auxiliary device comprises a bearing plate (21), a mounting plate (22) and a buffer pad (23), the bearing plate (21) is fixedly installed on the surface of the E-shaped bracket (5), the mounting plate (22) is fixedly installed on one side of the bearing plate (21) close to the pull-out plate (6), the buffer pad (23) is fixedly installed on the surface of the mounting plate (22), and the buffer pad (23) is attached to the outer side wall of the pull-out plate (6).

2. A coal economizer with wear-resistant protection effect for hot water boilers according to claim 1, characterized in that: The E-shaped bracket (5) is provided with an internally threaded blind hole on one side close to the sealing cover plate (7), the sealing cover plate (7) is provided with an internally threaded through hole at the corresponding position, and the E-shaped bracket (5) and the sealing cover plate (7) are fixedly connected through bolts.

3. A economizer with wear protection effect for hot water boilers according to claim 2, characterized in that: The surface of the bearing plate (21) is provided with an assembly groove; a convex frame (24) is fixedly installed inside the assembly groove, a round sliding block (25) is slidingly installed inside the convex frame (24), a compression spring (26) is arranged between the convex frame (24) and the round sliding block (25), a linkage block (27) is fixedly installed on the side of the round sliding block (25) away from the compression spring (26), a groove is formed on the side of the linkage block (27) close to the long strip plate (10), and the arc surface of one end of the long strip plate (10) is in contact with the groove.

4. A economizer with wear-resistant protection effect for hot water boiler according to claim 3, characterized in that: The anti-shaking stabilizing device comprises a carrying seat (31), a hollow pipe (32), a cylindrical rod (33) and a rubber ring (34), the carrying seat (31) is fixedly installed on the surface of the E-shaped bracket (5), the hollow pipe (32) is fixedly installed on the outer wall of the carrying seat (31), the cylindrical rod (33) is slidingly installed on the inner wall of the hollow pipe (32), the cylindrical rod (33) is fixedly connected with the linkage block (27), and the rubber ring (34) is fixedly installed on the side of the hollow pipe (32) close to the linkage block (27).

5. A economizer with wear protection for hot water boilers according to claim 4, characterized in that: The circumferential surface of the cylindrical rod (33) is fixedly installed with an elastic rubber sleeve (35), the outer wall of the carrying seat (31) is fixedly installed with a connecting pipe (36), the surface of the connecting pipe (36) is provided with a through groove, the end of the through groove close to the hollow pipe (32) gradually increases in diameter towards the other end, and the elastic rubber sleeve (35) is attached to the inner wall of the through groove.

Images