Corrosion and wear resistant economizer and method of making same

Abstract

The present application relates to the field of economizer, specifically to a kind of corrosion and abrasion resistant economizer and its preparation method, including corrosion and abrasion resistant economizer, including induced draft shell, water pipe is fixedly connected between the two sides of the inner wall of the induced draft shell, the surface of the water pipe is fixedly installed with helical fin.This kind of corrosion and abrasion resistant economizer, through adjusting mechanism and cleaning mechanism linkage, realize the automatic switching of cleaning direction with spiral ring movement, right shift, cleaning plate keeps initial angle, brush adapts spiral fin curved surface to clean dust, left shift, rod-shaped air scoop drives driving rod to extrude pad rod, through the transmission of sale shaft and chute to make cleaning plate rotate ninety degrees, so that cleaning plate can clean water pipe wall, by let brush angle, pressure directional adaptation cleaning object, also can select special brush material according to two types of dust characteristics, completely avoid the problem of bristle length compromise, low cleaning efficiency in simultaneous cleaning scheme, effectively break down thermal resistance, reduce corrosion.

Description

Technical Field

[0001] This invention relates to the field of economizers, specifically to a corrosion-resistant and wear-resistant economizer and its preparation method. Background Technology

[0002] Economizers are the core heat exchange equipment in energy-saving boiler systems. They improve thermal efficiency, save energy, and extend boiler life by preheating feedwater with waste heat from flue gas. Their operating performance has become a key factor restricting the efficiency of thermal systems.

[0003] Existing economizers mostly adopt a structure with spiral fins on the surface of water pipes to enhance heat exchange, but they face problems such as ash accumulation, corrosion, wear and unreliable ash cleaning mechanisms during long-term operation, which seriously affect stability and service life.

[0004] The following problems exist in the existing technology that have not been well resolved: 1. Solid impurities and corrosive media mixed in the flue gas are easily deposited and adhered to the surface of the spiral fins and water pipe walls. This deposit layer not only increases the heat exchange resistance and reduces the heat exchange efficiency of the economizer, but also accelerates the corrosion failure process of the pipe wall. In the existing technology, some spiral fin economizers adopt a structural design with cleaning brushes on the fin surface. The cleaning brushes are used to clean the ash on the fin surface. However, due to the limited design of the cleaning brush movement mechanism, the cleaning movement direction cannot be switched, making it difficult to effectively clean the ash on the water pipe wall; 2. During the use of the cleaning brush, impurities in the flue gas are easily adhered to the surface, affecting the cleaning brush's performance. Some existing cleaning brushes are difficult to self-clean effectively during use. Summary of the Invention

[0005] The purpose of this invention is to provide a corrosion-resistant and wear-resistant economizer and its manufacturing method, so as to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a corrosion-resistant and wear-resistant economizer, comprising an induced draft shell, a water pipe fixedly connected between the two sides of the inner wall of the induced draft shell, and helical fins fixedly installed on the surface of the water pipe; and a helical ring movably installed on the surface of the water pipe and moving along the trajectory of the helical fins;

[0006] It also includes: a cleaning mechanism that is mounted on the surface of the spiral ring and fits against the spiral fins, for cleaning dust from the surface of the spiral fins;

[0007] An adjustable mechanism, installed between the spiral ring and the surface of the water pipe, is used to switch the cleaning position of the cleaning system.

[0008] Preferably, the cleaning mechanism includes: a support plate symmetrically fixedly connected to the lower part of the spiral ring;

[0009] A cleaning plate is rotatably connected to the end of the support plate. Cleaning grooves are provided on both sides of the cleaning plate, and cleaning bristles are fixedly connected to the inner wall of the cleaning groove.

[0010] A grating plate that is slidably disposed inside the cleaning tank;

[0011] A reset spring rod is fixedly connected to the side wall of the cleaning plate. The movable end of the reset spring rod is fixedly connected to a U-shaped connecting plate. The U-shaped connecting plate is sleeved in the middle of the cleaning plate, and its open end is fixedly connected to the side wall of the adjacent grid plate.

[0012] A connecting rod that is fixedly connected between the grid plates on both sides of the cleaning plate;

[0013] A pad rod is slidably disposed at the bottom of the support plate and cooperates with the adjustment mechanism. The surface of the cleaning plate is provided with an inclined groove, and one end of the pad rod is slidably disposed inside the corresponding inclined groove.

[0014] Preferably, the cleaning plate has a groove in the middle that mates with the spiral ring, and the U-shaped connecting plate is fitted inside the groove;

[0015] The grid plate on the side away from the groove is fixedly connected to the open end of the U-shaped connecting plate via a connecting shaft.

[0016] Preferably, the bottom of the support plate is fixedly connected to a horizontally arranged slide cylinder, the middle part of the pad rod is slidably arranged inside the slide cylinder, and a pad ring is fixedly connected to the middle part of the pad rod. A restoring spring for driving the pad ring to reset is movably connected to the inner wall of the slide cylinder.

[0017] The end of the pad rod near the cleaning plate is hinged to a pin, and one end of the pad rod is slidably disposed inside the adjacent inclined groove via the pin.

[0018] Preferably, the adjustment mechanism includes: at least one support cylinder disposed on the surface of the spiral ring, a rod-shaped air bucket rotatably connected to the axial position of the support cylinder, and a drive rod cooperating with the cleaning mechanism symmetrically fixedly connected to the upper part of the rod-shaped air bucket;

[0019] An adjusting disc is fixedly connected to the end of a rod-shaped wind hopper. An adjusting pin is eccentrically fixedly connected to the surface of the adjusting disc, and a waist-shaped adjusting plate is slidably arranged on the surface of the adjusting pin.

[0020] Guide sleeves are symmetrically fixedly connected to both sides of the support cylinder. L-shaped guide rods are slidably arranged inside the two guide sleeves. The opposite ends of the two L-shaped guide rods are fixedly connected to both sides of the waist-shaped adjustment plate.

[0021] A pusher spiral plate is movably connected to both ends of the water pipe to drive the L-shaped guide rod to move horizontally. An electric push rod is fixedly connected between the surface of the pusher spiral plate and the side plate of the spiral fin.

[0022] Preferably, the inner wall of the guide sleeve is fixedly connected with four limiting spring rods at equal intervals along the circumference, and the movable end of the limiting spring rod is fixedly connected with a trapezoidal limiting block. The surface of the L-shaped guide rod is provided with a limiting ring groove that engages with the trapezoidal limiting block.

[0023] Preferably, the inner wall of the support cylinder is symmetrically fixedly connected with a main magnetic block, and the surface of the adjustment disk is fixedly connected with a slave magnetic block that cooperates with the main magnetic block. The adjustment disk deflects after the restriction is released by the cooperation of the main magnetic block and the slave magnetic block.

[0024] Preferably, both sides of the water pipe are fixedly connected to a stop block to restrict the movement of the spiral ring, and a pressure sensor is fixedly connected to the surface of the stop block, the pressure sensor being electrically connected to the electric push rod;

[0025] The spiral ring is made of deformable metal material, and the three support cylinders are equidistant and distributed in a ring along the trajectory of the spiral ring.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] In this invention, the cleaning direction is automatically switched with the movement of the spiral ring by linking the adjustment mechanism and the cleaning mechanism. When moving to the right, the cleaning plate maintains its initial angle, and the brush adapts to the curved surface of the spiral fins to clean the accumulated dust. When moving to the left, the rod-shaped air bucket drives the drive rod to squeeze the pad rod, and the pin shaft and inclined groove drive the cleaning plate to rotate 90 degrees, so that the cleaning plate can clean the water pipe wall. By making the brush angle and pressure orientation adapt to the cleaning object, and by selecting special brush materials for the two types of dust accumulation characteristics, the problem of compromise in brush bristle length and low cleaning efficiency in the same cleaning scheme is completely avoided. It effectively breaks thermal resistance, reduces corrosion, and significantly improves the heat exchange efficiency and operational stability of the economizer.

[0028] In this invention, by using the U-shaped connecting plate, the grid plate and the reset spring rod together, the used cleaning bristles can be automatically scraped and cleaned each time the cleaning plate rotates to switch working states. This effectively removes the accumulated dust and maintains the cleanliness and cleaning efficiency of the cleaning bristles themselves, solving the problems of traditional cleaning elements being easily contaminated and requiring frequent maintenance, and ensuring long-term and stable cleaning performance. Attached Figure Description

[0029] Figure 1 This is a cross-sectional view of a portion of the air intake housing and water pipe of the present invention;

[0030] Figure 2 This is a perspective view showing the positions of the water pipe and the spiral fins of the present invention.

[0031] Figure 3 For the present invention Figure 2 Enlarged view of the structure at point A in the middle;

[0032] Figure 4This is a perspective view of the spiral ring and support plate of the present invention;

[0033] Figure 5 For the present invention Figure 4 Enlarged view of the structure at point B;

[0034] Figure 6 This is a perspective view of a portion of the driving rod and the pad rod of the present invention;

[0035] Figure 7 This is a cross-sectional view of a portion of the cleaning plate and the U-shaped connecting plate of the present invention;

[0036] Figure 8 This is a cross-sectional view of a portion of the inclined groove and the pad rod of the present invention;

[0037] Figure 9 This is a cross-sectional view of a portion of the rod-shaped wind hopper and the L-shaped guide rod of the present invention;

[0038] Figure 10 For the present invention Figure 9 Enlarged view of the structure at point C;

[0039] Figure 11 This is a cross-sectional view of a portion of the support cylinder and the waist-shaped adjustment plate of the present invention;

[0040] Figure 12 This is a perspective view of a portion of the water pipe and the driving spiral plate of the present invention;

[0041] Figure 13 This is a top sectional view of a portion of the main magnetic block and the slave magnetic block of the present invention.

[0042] In the diagram: 1. Exhaust fan housing; 2. Water pipe; 3. Spiral fins; 4. Spiral ring; 5. Cleaning mechanism; 501. Support plate; 502. Cleaning plate; 503. Cleaning trough; 504. Cleaning bristles; 505. Grille plate; 506. Return spring rod; 507. U-shaped connecting plate; 508. Connecting rod; 509. Pad rod; 510. Inclined groove; 511. Groove; 512. Slide cylinder; 513. Washer ring; 514. Return spring; 515. Pin; 6. Adjustment mechanism; 601, support cylinder; 602, rod-shaped air duct; 603, drive rod; 604, adjustment disc; 605, adjustment pin; 606, waist-shaped adjustment plate; 607, guide sleeve; 608, L-shaped guide rod; 609, push spiral plate; 610, electric push rod; 611, limit spring rod; 612, trapezoidal limit block; 613, limit ring groove; 614, main magnetic block; 615, slave magnetic block; 616, stop block; 617, pressure sensor. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Please see Figures 1 to 13 This invention provides a technical solution: a corrosion-resistant and wear-resistant economizer, comprising an induced draft shell 1, with water pipes 2 fixedly connected between the two sides of the inner wall of the induced draft shell 1, and spiral fins 3 fixedly installed on the surface of the water pipes 2. It should be noted that the water pipes 2 are arranged in multiple layers, with adjacent layers staggered to ensure effective heat exchange of the airflow inside the induced draft shell 1; the surfaces of the water pipes 2 and the spiral fins 3 are coated with corrosion-resistant and wear-resistant coatings to ensure corrosion and wear resistance during normal use; and the induced draft shell 1 is a detachable shell for easy disassembly and maintenance.

[0045] A spiral ring 4 is mounted on the surface of water pipe 2 and moves along the trajectory of spiral fins 3. It should be noted that the inner ring of the spiral ring 4 is equipped with ball bearings, which fit snugly against the surface of water pipe 2 to reduce frictional resistance during the movement of the spiral ring 4.

[0046] It also includes a cleaning mechanism 5 that is movably mounted on the surface of the spiral ring 4 and fits against the spiral fins 3, for cleaning dust from the surface of the spiral fins 3.

[0047] An adjustment mechanism 6 is installed between the spiral ring 4 and the surface of the water pipe 2 to switch the cleaning position of the cleaning mechanism 5.

[0048] In this embodiment, as Figures 1 to 13 As shown, the cleaning mechanism 5 includes: a support plate 501 symmetrically fixedly connected to the lower part of the spiral ring 4; a cleaning plate 502 rotatably connected to the end of the support plate 501; and cleaning grooves 503 on both sides of the cleaning plate 502. Cleaning bristles 504 are fixedly connected to the inner wall of the cleaning groove 503. A grid plate 505 for self-cleaning of the cleaning bristles 504 is slidably arranged inside the cleaning groove 503. It should be noted that: a support shaft is fixedly connected to the end of the support plate 501, and the cleaning plate 502 is rotatably mounted on the surface of the support shaft through a bearing; when the grid plate 505 moves inside the cleaning groove 503, the grid plate 505 can scrape away foreign matter from the surface of the cleaning bristles 504, improving the cleaning effect of the cleaning bristles 504.

[0049] A reset spring rod 506 is fixedly connected to the side wall of the cleaning plate 502, and a U-shaped connecting plate 507 is fixedly connected to the movable end of the reset spring rod 506. The U-shaped connecting plate 507 is sleeved in the middle of the cleaning plate 502, and the open end of the U-shaped connecting plate 507 is fixedly connected to the side wall of the adjacent grid plate 505. A connecting rod 508 is fixedly connected between the grid plates 505 on both sides of the cleaning plate 502. It should be noted that: the connecting rod 508 enables the grid plates 505 on both sides of the cleaning plate 502 to move synchronously. When the left grid plate 505 of the cleaning plate 502 moves outward, the right grid plate 505 moves inward into the cleaning tank 503, thereby switching the cleaning state and ensuring that the cleaning bristles 504 at the position of the right grid plate 505 do not self-clean during use. Furthermore, the cleaning bristles 504 at different cleaning positions can be made of special brush materials according to the characteristics of dust accumulation. For example, the spiral fin cleaning side uses ceramic fiber reinforced silicon carbide bristles, and the water pipe wall cleaning side uses high-temperature resistant nickel-chromium alloy wire bristles.

[0050] A pad rod 509 is slidably disposed at the bottom of the support plate 501 and cooperates with the adjustment mechanism 6. A groove 510 is formed on the surface of the cleaning plate 502, and one end of the pad rod 509 is slidably disposed inside the corresponding groove 510. It should be noted that when the adjustment mechanism 6 is in operation, it drives the pad rod 509 to move horizontally at the bottom of the support plate 501, causing the pad rod 509 to pull the cleaning plate 502 to rotate through the groove 510, thus changing the cleaning direction of the cleaning plate 502.

[0051] In this embodiment, as Figures 1 to 13 As shown, the cleaning plate 502 has a groove 511 in the middle that mates with the spiral ring 4, and the U-shaped connecting plate 507 is fitted inside the groove 511. It should be noted that: two cleaning grooves 503 are formed on the side of the cleaning plate 502 near the groove 511, and the two cleaning grooves 503 are arranged vertically. The cleaning bristles 504 inside the cleaning grooves 503 are used to clean the surface of the water pipe 2; a cleaning groove 503 is formed on the side of the cleaning plate 502 away from the groove 511. The cleaning bristles 504 inside the cleaning groove 503 are used to clean the surface of the spiral fins 3. The groove 511 is set so that after the cleaning plate 502 rotates 90 degrees at the end of the support plate 501, the cleaning plate 502 will not interfere with the spiral ring 4.

[0052] The grid plate 505 on the side away from the groove 511 is fixedly connected to the open end of the U-shaped connecting plate 507 via a connecting shaft.

[0053] In this embodiment, as Figures 1 to 13As shown, a horizontally arranged slide cylinder 512 is fixedly connected to the bottom of the support plate 501. The middle part of the pad rod 509 is slidably disposed inside the slide cylinder 512, and a washer ring 513 is fixedly connected to the middle part of the pad rod 509. A restoring spring 514 that drives the washer ring 513 to reset is movably connected to the inner wall of the slide cylinder 512. It should be noted that when the adjusting mechanism 6 releases the pressure on the pad rod 509, the restoring spring 514 can drive the pad rod 509 to reset, so that the pad rod 509, along with the cleaning plate 502, resets and rotates on the surface of the support plate 501. The elastic restoring force of the restoring spring 514 is less than the elastic force of the upper limit spring rod 611 of the adjusting mechanism 6, ensuring the stability of the pad rod 509 after the adjusting mechanism 6 drives it to move.

[0054] One end of the pad rod 509 near the cleaning plate 502 is hinged to a pin 515, and one end of the pad rod 509 is slidably disposed inside the adjacent inclined groove 510 via the pin 515.

[0055] In this embodiment, as Figures 1 to 13 As shown, the adjustment mechanism 6 includes three support cylinders 601 equidistantly arranged on the surface of the spiral ring 4, with a rod-shaped air hopper 602 rotatably connected to the axial position of the support cylinders 601. A drive rod 603, cooperating with the pad rod 509, is symmetrically fixedly connected to the upper part of the rod-shaped air hopper 602. It should be noted that when the airflow delivered into the air intake housing 1 impacts the surface of the rod-shaped air hopper 602, the rod-shaped air hopper 602 drives the spiral ring 4 to rotate and translate along the trajectory of the spiral fins 3 on the surface of the water pipe 2. When the rod-shaped air hopper 602 rotates 180 degrees on the surface of the support cylinders 601, and the airflow impacts the surface of the rod-shaped air hopper 602 after the change in direction, the rod-shaped air hopper 602 moves in the opposite direction, causing the spiral ring 4 to reset. The rod-shaped air hopper 602, after rotating 180 degrees, rotates with the drive rod 603 and presses against the end of the corresponding pad rod 509, thereby driving the pad rod 509 to translate at the bottom of the support plate 501, switching the cleaning direction of the cleaning plate 502.

[0056] An adjusting disc 604 is fixedly connected to the end of the rod-shaped air duct 602, and an adjusting pin 605 is eccentrically fixedly connected to the surface of the adjusting disc 604. A waist-shaped adjusting plate 606 is slidably disposed on the surface of the adjusting pin 605. It should be noted that the adjusting disc 604 is rotatably disposed inside the support cylinder 601. When the waist-shaped adjusting plate 606 moves across the surface of the adjusting disc 604, the adjusting disc 604 can rotate inside the support cylinder 601 by sliding through the waist-shaped groove in the middle of the waist-shaped adjusting plate 606, thanks to the cooperation between the adjusting pin 605 and the adjusting pin 605.

[0057] Guide sleeves 607 are symmetrically fixedly connected to both sides of the support cylinder 601. L-shaped guide rods 608 that can be limited are slidably arranged inside the two guide sleeves 607 respectively. The opposite ends of the two L-shaped guide rods 608 are fixedly connected to both sides of the waist-shaped adjustment plate 606 respectively.

[0058] Pushing spiral plates 609 are movably connected to both ends of the water pipe 2 to drive the L-shaped guide rods 608 to translate. An electric push rod 610 is fixedly connected between the surface of the pushing spiral plate 609 and the side plate of the spiral fins 3. It should be noted that when the spiral ring 4 moves to the position of the pushing spiral plate 609 at the end of the water pipe 2, the electric push rod 610 drives the pushing spiral plate 609 to move. Simultaneously, the pushing spiral plate 609 presses against the ends of the L-shaped guide rods 608 on the side walls of the three support cylinders 601. Under pressure, the L-shaped guide rods 608, through the waist-shaped adjusting plate 606 and the adjusting pin 605, drive the adjusting disc 604 to rotate, thus switching the direction of the rod-shaped air duct 602.

[0059] In this embodiment, as Figures 1 to 13 As shown, four limiting spring rods 611 are fixedly connected at equal intervals along the circumference of the inner wall of the guide sleeve 607, and a trapezoidal limiting block 612 is fixedly connected to the movable end of the limiting spring rod 611. A limiting ring groove 613 is opened on the surface of the L-shaped guide rod 608 to engage with the trapezoidal limiting block 612. It should be noted that: when the adjusting disc 604 rotates 180 degrees, the waist-shaped adjusting plate 606 moves to its limit position inside the support cylinder 601. At this time, the limiting ring groove 613 on the surface of the L-shaped guide rod 608 moves to the position of the trapezoidal limiting block 612 on the inner wall of the guide sleeve 607. The limiting spring rod 611 carries the trapezoidal limiting block 612 into the limiting ring groove 613, ensuring the stability of the rod-shaped air duct 602 after the direction is switched. When the rod-shaped air duct 602 needs to switch positions again, the corresponding electric push rod 610 drives the spiral plate 609 to squeeze the L-shaped guide rod 608 to move. Under the squeezing force of the electric push rod 610, the limiting ring groove 613 on the surface of the L-shaped guide rod 608 disengages from the trapezoidal limiting block 612 to switch positions. The elastic force of the limiting spring rod 611 is greater than the elastic force of the restoring spring 514, ensuring the stable locking of the L-shaped guide rod 608.

[0060] In this embodiment, as Figures 1 to 13As shown, a main magnetic block 614 is symmetrically fixedly connected to the inner wall of the support cylinder 601, and a slave magnetic block 615 that cooperates with the main magnetic block 614 is fixedly connected to the surface of the adjustment disk 604. The adjustment disk 604 after the restriction is released is driven to deflect by the cooperation of the main magnetic block 614 and the slave magnetic block 615. It should be noted that the main magnetic block 614 and the slave magnetic block 615 have opposite magnetic properties. When the L-shaped guide rod 608 and the trapezoidal limiting block 612 are released from their limiting state, the waist-shaped adjusting plate 606 on the L-shaped guide rod 608 releases its restriction on the adjusting disk 604. At this time, the main magnetic block 614 and the adjacent slave magnetic block 615 attract each other, driving the adjusting disk 604 to deflect slightly. The auxiliary waist-shaped adjusting plate 606 and the adjusting pin 605 cooperate to drive the adjusting disk 604 to rotate inside the support cylinder 601. There is only one slave magnetic block 615, so that after the adjusting disk 604 rotates 180 degrees forward or backward, it can attract the corresponding main magnetic block 614 through the slave magnetic block 615 at the bottom.

[0061] In this embodiment, as Figures 1 to 13 As shown, both sides of the water pipe 2 are fixedly connected to stop blocks 616 that restrict the movement of the spiral ring 4, and pressure sensors 617 are fixedly connected to the surface of the stop blocks 616. The pressure sensors 617 are electrically connected to the electric push rod 610. It should be noted that a PLC controller is installed on the outside of the air duct housing 1, and the pressure sensor 617 and the electric push rod 610 are used in conjunction through the PLC controller.

[0062] The spiral ring 4 is made of a deformable metal material, and three support cylinders 601 are equidistantly distributed along the trajectory of the spiral ring 4 in a ring arrangement. It should be noted that the spiral ring 4 near both ends uses a deformable metal material, such as 304 austenitic stainless steel that can be bent, disassembled, and installed, facilitating installation on the surface of the water pipe 2. The middle portion of the spiral ring 4 uses 304 stainless steel to ensure its service life and stability. Two support plates 501 are respectively located on both sides of the support cylinder 601 in the middle of the spiral ring 4.

[0063] In this embodiment, as Figures 1 to 13 As shown, a method for preparing a corrosion-resistant and wear-resistant economizer includes the following steps:

[0064] S1. During preparation, the heat exchange and cleaning start-up stage: The spiral ring 4 is installed on the surface of the water pipe 2, and then the water pipe 2 is installed between the mounting holes on both sides of the exhaust housing 1. The spiral fins 3 are welded to the surface of the water pipe 2. At the same time, the spiral fins 3 and the surface of the water pipe 2 are treated with anti-corrosion and wear-resistant treatment. When the equipment is running, the gas to be heat exchanged is delivered to the interior of the exhaust housing 1. During the process of the airflow passing through the spiral fins 3 on the surface of the water pipe 2, the airflow completes the heat exchange operation with the medium flowing inside the water pipe 2. During this heat exchange process, the airflow forms an impact load on the rod-shaped air bucket 602 on the surface of the spiral ring 4, driving the rod-shaped air bucket 602 to rotate along the surface of the water pipe 2, thereby driving the spiral ring 4 to rotate and translate along the spiral trajectory of the spiral fins 3. Simultaneously, the support plate 501 mounted on the spiral ring 4 drives the cleaning plate 502 to move in coordination along the trajectory of the spiral fins 3. The cleaning bristles 504 on the surface of the cleaning plate 502 accurately clean the dust and impurities attached to the surface of the spiral fins 3, realizing automatic cleaning operation.

[0065] S2, Reciprocating Movement Control Mechanism of Spiral Ring 4: When the spiral ring 4 moves to the right along the trajectory of the spiral fin 3 on the surface of the water pipe 2 to the limit position of its stroke, the end of the spiral ring 4 contacts and squeezes the stop 616 set on the right side of the surface of the water pipe 2, triggering the pressure sensor 617 integrated in the stop 616 to generate an electrical signal. This signal drives the electric push rod 610 electrically connected to it to perform a telescopic action. The electric push rod 610 outputs thrust to drive the spiral plate 609 to move along the surface of the water pipe 2 and to the right side of the support cylinder 601. The L-shaped guide rod 608 applies pressure to its end, causing the trapezoidal limiting block 612 inside the limiting annular groove 613 on its surface to disengage under pressure. This causes the L-shaped guide rod 608 to move to the left. Simultaneously, the waist-shaped adjusting plate 606, now free from its limiting state, and the adjusting disk 604, under the attraction of the main magnetic block 614 and the adjacent slave magnetic block 615, cause the adjusting disk 604 to deflect inside the support cylinder 601. This deflection of the adjusting disk 604 assists in the movement of the two... The waist-shaped adjusting plate 606 between the L-shaped guide rods 608 moves to the left on the surface of the adjusting plate 604. During this process, the adjusting pin 605 on the adjusting plate 604 and the waist-shaped groove in the middle of the waist-shaped adjusting plate 606 form a sliding fit. When the waist-shaped adjusting plate 606 moves to its leftmost position, the driving adjusting pin 605 drives the adjusting plate 604 to complete a 180-degree rotation, realizing the rotation switch of the rod-shaped air bucket 602 at the axis of the adjusting plate 604. After the rotation switch, the airflow impact direction is aligned with the rod-shaped air bucket 602. 2. A new interaction relationship is formed on the force-bearing surface, driving the rod-shaped air bucket 602 to rotate the spiral ring 4 in the opposite direction along the surface of the water pipe 2, so that the spiral ring 4 moves to the left along the surface of the water pipe 2 to reset and translate. Since the left side of the water pipe 2 is also equipped with a pushing spiral plate 609, a retaining ring and a pressure sensor 617, when the spiral ring 4 moves to the left to the limit position of the left stroke of the water pipe 2, the above triggering process is repeated to achieve the reversing and switching again, and finally achieves the reciprocating translational motion of the spiral ring 4 on the surface of the water pipe 2, ensuring the full coverage of the cleaning operation.

[0066] S3. Cleaning plate 502 working position switching function: When the spiral ring 4 switches to the leftward translation mode, the rotating rod-shaped air bucket 602 drives the two drive rods 603 assembled thereto to rotate synchronously. The two drive rods 603 respectively form a pressing action with the surface of the corresponding pad rod 509, causing the two pad rods 509 to produce relative displacement. During the displacement process, the pad rod 509 is driven by the meshing of the pin 515 and the inclined groove 510, pulling the cleaning plate 502 on the support plate 501 to complete a 90-degree rotation action, realizing the switching of the working position of the cleaning plate 502. At this time, after the cleaning bristles 504 on the opposite side of the two cleaning plates 502 rotate 90 degrees, they are in contact with the surface of the water pipe 2. The cleaning plate 502, which moves to the left with the spiral ring 4, performs all-round cleaning operation on the surface of the water pipe 2 through its surface cleaning bristles 504.

[0067] S4. Self-cleaning function of cleaning bristles 504: When the cleaning plate 502 completes a 90-degree working position switch, the U-shaped connecting plate 507 at the groove 511 in the middle of the cleaning plate 502 contacts the surface of the spiral ring 4 and bears pressure, causing the U-shaped connecting plate 507 to move in the direction of contact with the surface of the cleaning plate 502. During this displacement, the U-shaped connecting plate 507 synchronously drives the corresponding grid plate 505 to extend outward of the cleaning groove 503 through the connecting shaft, so that the moving grid plate 505 performs a scraping operation on the cleaning bristles 504 on the surface of the cleaning plate 502 used to clean the spiral fins 3, removing the cleaning bristles. The cleaning bristles 504 are free of impurities. Conversely, when the cleaning plate 502 performs a 90-degree rotation to reset, the U-shaped connecting plate 507 is reset and translated under the elastic restoring force of the reset spring rod 506. Through the transmission action of the connecting rod 508, the grid plates 505 on both sides of the cleaning plate 502 are driven to move synchronously. The cleaning plate 502, which is used to clean the surface of the water pipe 2, is reset along with the U-shaped connecting plate 507. At the same time, the grid plate 505 at the current position scrapes and cleans the cleaning bristles 504 on its surface, thereby realizing the self-cleaning function of the cleaning bristles 504 and ensuring the continuous cleaning efficiency of the cleaning bristles 504.

[0068] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant and wear-resistant economizer, comprising an induced draft shell (1), wherein a water pipe (2) is fixedly connected between the two sides of the inner wall of the induced draft shell (1), and a spiral fin (3) is fixedly installed on the surface of the water pipe (2); and a spiral ring (4) is movably installed on the surface of the water pipe (2) and moves along the trajectory of the spiral fin (3). Its features are, Also includes: A cleaning mechanism (5) is installed on the surface of the spiral ring (4) and attached to the spiral fins (3) for cleaning dust from the surface of the spiral fins (3); An adjustment mechanism (6) is installed between the spiral ring (4) and the surface of the water pipe (2) to switch the cleaning position of the cleaning mechanism (5). The cleaning mechanism (5) includes: a support plate (501) symmetrically fixedly connected to the lower part of the spiral ring (4); A cleaning plate (502) is rotatably connected to the end of the support plate (501). Cleaning grooves (503) are provided on both sides of the cleaning plate (502), and cleaning bristles (504) are fixedly connected to the inner wall of the cleaning grooves (503). A grid plate (505) is slidably disposed inside the cleaning tank (503); A reset spring rod (506) is fixedly connected to the side wall of the cleaning plate (502). The movable end of the reset spring rod (506) is fixedly connected to a U-shaped connecting plate (507). The U-shaped connecting plate (507) is sleeved in the middle of the cleaning plate (502), and its open end is fixedly connected to the side wall of the adjacent grid plate (505). A connecting rod (508) is fixedly connected between the grid plates (505) on both sides of the cleaning plate (502); A pad rod (509) is slidably disposed at the bottom of the support plate (501) and cooperates with the adjustment mechanism (6). The surface of the cleaning plate (502) is provided with a groove (510). One end of the pad rod (509) is slidably disposed inside the corresponding groove (510). The adjustment mechanism (6) includes: at least one support cylinder (601) disposed on the surface of the spiral ring (4), a rod-shaped air bucket (602) is rotatably connected to the axial position of the support cylinder (601), and a drive rod (603) that cooperates with the cleaning mechanism (5) is symmetrically fixedly connected to the upper part of the rod-shaped air bucket (602). An adjusting disc (604) is fixedly connected to the end of the rod-shaped wind hopper (602). An adjusting pin (605) is eccentrically fixedly connected to the surface of the adjusting disc (604). A waist-shaped adjusting plate (606) is slidably provided on the surface of the adjusting pin (605). Guide sleeves (607) are symmetrically fixedly connected to both sides of the support cylinder (601). L-shaped guide rods (608) are slidably arranged inside the two guide sleeves (607). The opposite ends of the two L-shaped guide rods (608) are fixedly connected to both sides of the waist-shaped adjustment plate (606). A pusher spiral plate (609) is movably connected to both ends of the water pipe (2) for driving the L-shaped guide rod (608) to translate. An electric push rod (610) is fixedly connected between the surface of the pusher spiral plate (609) and the side plate of the spiral fin (3).

2. The corrosion-resistant and wear-resistant economizer according to claim 1, characterized in that: The cleaning plate (502) has a groove (511) in the middle that matches the spiral ring (4), and the U-shaped connecting plate (507) is fitted inside the groove (511); The grid plate (505) on the side away from the groove (511) is fixedly connected to the open end of the U-shaped connecting plate (507) via a connecting shaft.

3. The corrosion-resistant and wear-resistant economizer according to claim 2, characterized in that: The bottom of the support plate (501) is fixedly connected to a horizontally arranged slide cylinder (512), the middle part of the pad rod (509) is slidably arranged inside the slide cylinder (512), and the middle part of the pad rod (509) is fixedly connected to a washer ring (513). The inner wall of the slide cylinder (512) is movably connected to a restoring spring (514) that drives the washer ring (513) to reset. The pad rod (509) is hinged to a pin (515) at one end near the cleaning plate (502), and one end of the pad rod (509) is slidably disposed inside the adjacent inclined groove (510) via the pin (515).

4. The corrosion-resistant and wear-resistant economizer according to claim 3, characterized in that: The inner wall of the guide sleeve (607) is fixedly connected with four limiting spring rods (611) at equal intervals along the circumference, and the movable end of the limiting spring rod (611) is fixedly connected with a trapezoidal limiting block (612). The surface of the L-shaped guide rod (608) is provided with a limiting ring groove (613) that engages with the trapezoidal limiting block (612).

5. The corrosion-resistant and wear-resistant economizer according to claim 4, characterized in that: The inner wall of the support cylinder (601) is symmetrically fixedly connected with a main magnetic block (614), and the surface of the adjustment disk (604) is fixedly connected with a slave magnetic block (615) that cooperates with the main magnetic block (614). The adjustment disk (604) after the restriction is released is driven to deflect by the cooperation of the main magnetic block (614) and the slave magnetic block (615).

6. The corrosion-resistant and wear-resistant economizer according to claim 5, characterized in that: Both sides of the water pipe (2) are fixedly connected to a stop block (616) that restricts the movement of the spiral ring (4), and a pressure sensor (617) is fixedly connected to the surface of the stop block (616). The pressure sensor (617) is electrically connected to the electric push rod (610). The spiral ring (4) is made of deformable metal material, and the three support cylinders (601) are equidistant and distributed in a ring along the trajectory of the spiral ring (4).

7. A method for preparing a corrosion-resistant and wear-resistant economizer, characterized in that, Using the corrosion-resistant and wear-resistant economizer as described in claim 6 includes the following steps: S1. During preparation, the spiral ring (4) is bent and installed on the surface of the water pipe (2). Then the water pipe (2) is installed between the mounting holes on both sides of the exhaust housing (1). The spiral fins (3) are welded to the surface of the water pipe (2). At the same time, the spiral fins (3) and the surface of the water pipe (2) are treated for corrosion and wear resistance. When the equipment is running, the gas to be exchanged for heat is sent into the exhaust housing (1). When it flows through the spiral fins (3) on the surface of the water pipe (2), it completes heat exchange with the medium in the water pipe (2). The airflow impacts the rod-shaped wind bucket (602) on the spiral ring (4), driving it to rotate around the water pipe (2), thereby driving the spiral ring (4) to rotate and translate along the spiral fins (3). Simultaneously, the cleaning plate (502) is driven to move in coordination through the support plate (501). The cleaning bristles (504) on the cleaning plate (502) clean the dust on the surface of the spiral fins (3). S2, the spiral ring (4) moves to the right along the spiral fin (3) to the limit, squeezing the right side stop (616) of the water pipe (2), triggering the pressure sensor (617) to generate a signal, driving the electric push rod (610) to extend and retract, driving the spiral plate (609) to move horizontally and apply pressure to the adjacent L-shaped guide rod (608). After the trapezoidal limit block (612) and the L-shaped guide rod (608) are separated from the limit, the L-shaped guide rod (608) moves to the left. The waist-shaped adjustment plate (606) and the adjustment disk (604) deflect and move horizontally under the cooperation of the main magnetic block (614) and the slave magnetic block (615). The adjustment pin (605) drives the adjustment disk (604) to rotate 180 degrees, switching the direction of the rod-shaped air bucket (602), driving the spiral ring (4) to move to the left. When it moves to the limit to the left, the process is repeated to achieve reciprocating horizontal movement. S3. When the spiral ring (4) moves to the left, the rotating rod-shaped air bucket (602) drives the drive rod (603) to rotate, squeezing the pad rod (509) to generate displacement. The pad rod (509) is driven by the pin shaft (515) and the inclined groove (510), pulling the cleaning plate (502) on the support plate (501) to rotate 90 degrees. The cleaning bristles (504) on the opposite side of the cleaning plate (502) adhere to the surface of the water pipe (2) and clean it as the spiral ring (4) moves to the left. S4. When the cleaning plate (502) rotates 90 degrees, the U-shaped connecting plate (507) is displaced under pressure, and the grid plate (505) is extended through the connecting shaft to scrape and clean the cleaning hairs (504) of the spiral fins (3). When the cleaning plate (502) is reset and rotated 90 degrees, the U-shaped connecting plate (507) is reset by the reset spring rod (506), and the grid plate (505) connected to it is driven by the connecting rod (508) to generate synchronous displacement, which drives the grid plate (505) on the opposite side to synchronously complete the scraping operation on the corresponding cleaning hairs (504).

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