Ash removal device for heat exchange tube nest of incinerator

Abstract

The invention discloses an ash removal device for heat exchange tube nests of an incinerator. A grating plate is fixed to a lifting platform, a fence and a plurality of sliding rails are fixed to the upper surface of the grating plate, a first movable support is movably arranged on the sliding rails, a supporting rod is vertically fixed to one end of the first movable support, and a second movable support is movably arranged on the first movable support; a motor is fixed to the second movable support, one end of an output shaft of the motor is connected with one end of a connecting piece through a flange, the other end of the connecting piece is detachably connected with one end of an ash removal pipe, a drill bit is fixed to the other end of the ash removal pipe, and the ash removal pipe is in lap joint with the top end surface of the supporting rod. By means of the device, climbing operation is avoided, the time for cleaning each heat exchange tube nest is averagely within 5 minutes, the time is shortened by 2 / 3 compared with the original time, the labor intensity of workers is remarkably reduced, and the dust cleaning efficiency is improved. Meanwhile, close-range contact between workers and the heat exchange tube nests is avoided, and accidental scalding of the workers is effectively reduced.

Description

Technical fields: This invention relates to the field of ash removal equipment technology, specifically to an ash removal device for heat exchange tubes in an incinerator. Background technology: The heat exchange tubes in an incinerator are important components used for heat exchange in an incinerator.

[0001] Incinerators generate high temperatures during operation. Heat exchanger tubes, typically composed of multiple tubes arranged in a bundle, are usually installed in specific parts of the incinerator. Their function is to allow heat transfer between hot fluids (such as the high-temperature flue gas produced by combustion) and cold fluids (such as water, air, or other media requiring heating) through the tube walls, achieving effective heat recovery and utilization. In an incinerator, heat exchanger tubes can transfer heat from the high-temperature flue gas to cold water, heating the water into hot water or steam. This hot water or steam can then be used in other industrial production processes or for domestic heating, thereby improving energy efficiency and reducing operating costs. Simultaneously, a well-designed and arranged heat exchanger tube configuration ensures stable operation of the incinerator, guaranteeing efficient and safe heat exchange.

[0002] The existing defects are: 1. After high-temperature flue gas is introduced into the heat exchange tubes, a large amount of dust and impurities adhere to the tube walls, resulting in a reduction in heat exchange efficiency. Therefore, it is necessary to clean the inside of the heat exchange tubes regularly. In the past, this was done manually using a chisel, which took an average of 15 minutes to clean each heat exchange tube, and even longer when the deposits were severe.

[0003] 2. Secondly, the incinerator is generally 2-3 meters above the ground, and its diameter is about 1.3 meters. The cleaning is done manually using a chisel, and usually ladders and other climbing tools are also used. At the same time, the high-temperature flue gas will cause the temperature of the heat exchange tubes to rise after entering them, which can easily cause burns. During the cleaning of the heat exchange tubes at height, it is necessary for others to hold the ladder, which increases labor costs, the labor intensity of the workers is high, and there is a safety risk of accidental burns. Summary of the Invention: The purpose of this invention is to provide a ash removal device for heat exchange tubes in an incinerator, so as to solve the problems mentioned in the background art.

[0004] This invention is implemented by the following technical solution: A ash-cleaning device for heat exchanger tubes in an incinerator includes a lifting platform, slide rails, a first movable support, a support rod, a second movable support, a motor, a connector, an ash-cleaning pipe, and a drill bit. Multiple slide rails are fixed on the lifting platform, and the first movable support is movably mounted on each slide rail. A support rod is vertically fixed to one end of each first movable support. A second movable support is movably mounted on the first movable support, and a motor is fixed to the second movable support. One end of the motor's output shaft is connected to one end of the connector via a flange. The other end of the connector is detachably connected to one end of the ash-cleaning pipe. A drill bit is fixed to the other end of the ash-cleaning pipe. The drill bit is made of a cross-shaped steel plate twisted into a spiral shape. The ash-cleaning pipe overlaps the top surface of the support rod.

[0005] Preferably, a grating plate is fixed on the lifting platform, and a fence is fixed on the upper surface of the grating plate.

[0006] Preferably, the lifting platform includes two fixed frames, two sets of scissor mechanisms, and a frame; Each fixed frame is connected to a set of scissor lift mechanisms, and the frame is connected between the tops of the two sets of scissor lift mechanisms.

[0007] Preferably, the fixing frame is provided with a connecting rod in the middle, and two first sliding grooves are symmetrically provided on both sides of the middle of the fixing frame. Two sets of second sliding grooves are provided on both sides of the frame, and the two second sliding grooves in each set are symmetrically arranged. The two scissor lift mechanisms in each group have the same structure. Each scissor lift mechanism includes: a pair of left connecting rods, a pair of right connecting rods, a hydraulic cylinder, and a connecting shaft. The left and right connecting rods are movably connected by the connecting shaft. One end of the left connecting rod is hinged to both ends of the fixed frame, and the other end of the left connecting rod is slidably hinged to the second sliding groove on the lower surface of the frame. One end of the right connecting rod is slidably hinged to the first sliding groove on both sides of the fixed frame, and the other end of the right connecting rod is hinged to the lower surface of the frame. The bottom of the hydraulic cylinder is hinged to the middle of the connecting rod, and one end of the piston rod of the hydraulic cylinder is hinged to the middle of the connecting shaft.

[0008] Preferably, the first movable support is welded from two long channel steels and several short channel steels. A support rod is vertically fixed on the outermost short channel steel. The top surface of the support rod is an arc-shaped concave surface. Three pairs of first traveling wheels are fixed on the lower surfaces of the two long channel steels. The first traveling wheels move on the slide rail.

[0009] Preferably, four second traveling wheels are fixed around the bottom of the second movable support, and the second traveling wheels move on the long channel steel.

[0010] Preferably, the connector is made by welding a flange and a square insert. The square insert has a threaded hole, and one end of the cleaning pipe has a rectangular groove that matches the square insert. The rectangular groove has a stepped through hole. The square insert is inserted into the rectangular groove, and the connector and the cleaning pipe are fixedly connected by threaded connection through the stepped through hole and the threaded hole using an internal hex bolt.

[0011] Advantages of this invention: This device eliminates the need for working at heights. Cleaning each heat exchanger tube takes an average of less than 5 minutes, reducing the time by 2 / 3 compared to previous methods. This significantly reduces labor intensity and improves cleaning efficiency. Simultaneously, it avoids close contact between workers and the heat exchanger tubes, effectively reducing the risk of accidental burns. Attached image description: Figure 1 A schematic diagram of the heat exchanger tubes in an existing incinerator. Figure 2 This is a schematic diagram of the main structure of the present invention; Figure 3 This is a structural schematic diagram of the lifting platform; Figure 4 This is a partial structural diagram of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the structure of the first movable support; Figure 6 This is a partial structural diagram of the present invention. Figure 2 ; Figure 7 This is a partial schematic diagram of the ash removal pipe; Figure 8 This is a partial schematic diagram of the ash removal pipe and drill bit; Figure 9 for Figure 2 Enlarged view of point A in the middle.

[0012] In the diagram: 1. Lifting platform; 1.1. Fixed frame; 1.11. Connecting rod; 1.12. First slide rail; 1.2. Scissor mechanism; 1.21. Left connecting rod; 1.22. Right connecting rod; 1.23. Connecting shaft; 1.3. Hydraulic cylinder; 1.4. Frame; 1.41. Second slide rail; 2. Grating plate; 3. Fence; 4. Slide rail; 5. First moving support; 5.1. Long channel steel; 5.2. Short channel steel; 6. Support rod; 6.1. Arc-shaped concave surface; 7. Second moving support; 8. Motor; 9. Connecting parts; 9.1. Flange; 9.2. Square insert; 9.21. Threaded hole; 10. Dust removal pipe; 10.1. Rectangular groove; 10.11. Stepped through hole; 11. Drill bit; 12. First traveling wheel; 13. Second traveling wheel; 14. Hex socket head cap bolt. Detailed implementation method: 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.

[0013] Please see Figure 1-9 This invention provides a technical solution for a ash removal device for heat exchanger tubes in an incinerator: A ash-cleaning device for heat exchanger tubes in an incinerator includes a lifting platform 1, a grating plate 2, a fence 3, slide rails 4, a first movable support 5, a support rod 6, a second movable support 7, a motor 8, a connector 9, an ash-cleaning pipe 10, and a drill bit 11. The grating plate 2 is fixed on the lifting platform 1, and the grating plate 2 is raised and lowered via the lifting platform 1. The fence 3 and three slide rails 4 are fixed to the upper surface of the grating plate 2. The fence 3 is used to prevent workers from falling from the grating plate 2. The first movable support 5 is movably mounted on the three slide rails 4, and the first movable support 5 is vertically positioned relative to the slide rails 4, allowing it to move left and right along the slide rails 4. Because the ash-cleaning pipe 10 is relatively long, a support rod 6 is vertically fixed to one end of the first movable support 5 to ensure that the ash-cleaning pipe 10 can be stably and straightly inserted into the heat exchanger tubes. The ash-cleaning pipe 10 overlaps the top surface of the support rod 6. In order for the cleaning pipe 10 to be inserted into the heat exchange tube, a second moving support 7 is provided on the first moving support 5, so that the second moving support 7 can move back and forth along the first moving support 5. A motor 8 (model YE3-90L-4) is fixed on the second moving support 7. One end of the output shaft of the motor 8 and one end of the connector 9 are connected by a flange. The other end of the connector 9 is detachably connected to one end of the cleaning pipe 10. A drill bit 11 is fixed to the other end of the cleaning pipe 10. The drill bit 11 is made of a cross steel plate twisted into a spiral shape so as to collect the scraped dust in the cleaning pipe 10.

[0014] To illustrate the details of this plan, the specific content is as follows: The lifting platform 1 includes two fixed frames 1.1, two sets of scissor mechanisms 1.2, and a frame 1.4; each fixed frame 1.1 is connected to a set of scissor mechanisms 1.2, and the top of the two sets of scissor mechanisms 1.2 is connected to the frame 1.4.

[0015] The fixing frame 1.1 has a connecting rod 1.11 in the middle, and two first sliding grooves 1.12 are symmetrically arranged on both sides of the middle of the fixing frame 1.1. The frame 1.4 has two sets of second sliding grooves 1.41 on both sides respectively, and the two second sliding grooves 1.41 in each set are symmetrically arranged. The two scissor lift mechanisms 1.2 in each group have the same structure. Each scissor lift mechanism 1.2 includes: a pair of left connecting rods 1.21, a pair of right connecting rods 1.22, a hydraulic cylinder 1.3, and a connecting shaft 1.23. The left connecting rods 1.21 and right connecting rods 1.22 are movably connected by the connecting shaft 1.23. One end of the left connecting rod 1.21 is hinged to both ends of the fixed frame 1.1, and the other end of the left connecting rod 1.21 is slidably hinged to the second slide groove 1.41 on the lower surface of the frame 1.4. One end of the right connecting rod 1.22 is slidably hinged to the first slide groove 1.12 on both sides of the fixed frame 1.1, and the other end of the right connecting rod 1.22 is hinged to the lower surface of the frame 1.4. The bottom of the hydraulic cylinder 1.3 is hinged to the middle of the connecting rod 1.11, and one end of the piston rod of the hydraulic cylinder 1.3 is hinged to the middle of the connecting shaft 1.23. A grid plate 2 is fixed on the frame 1.4. Hydraulic cylinders 1.3 generally require an external air source and pneumatic switch, which is a conventional technical connection method for those skilled in the art. Therefore, as shown in the attached figure, when in use, the operator stands on the grating plate 2 and controls the four hydraulic cylinders 1.3 to extend and retract synchronously through the pneumatic switch, thereby driving the mechanical movement of the four scissor mechanisms 1.2, causing the frame 1.4 and the grating plate 2 to move up and down.

[0016] The first movable support 5 is welded from two long channel steels 5.1 and several short channel steels 5.2. A support rod 6 is vertically fixed on the outermost short channel steel 5.2. The top surface of the support rod 6 is an arc-shaped concave surface 6.1. The cleaning pipe 10 overlaps the arc-shaped concave surface 6.1 at the top of the support rod 6, so that the cleaning pipe 10 can always remain coaxial with the output shaft of the motor 8. Three pairs of first traveling wheels 12 are fixed on the lower surface of the two long channel steels 5.1. The first traveling wheels 12 move on the slide rail 4, realizing the left and right sliding of the first movable support 5 along the slide rail 4.

[0017] Four second traveling wheels 13 are fixed around the bottom of the second moving support 7. The second traveling wheels 13 move on the long channel steel 5.1, so that the second moving support 7 can move back and forth along the first moving support 5, which makes it easy to insert the ash cleaning pipe 10 into the heat exchange tube.

[0018] The connector 9 is welded from a flange 9.1 and a square insert 9.2. The square insert 9.2 has a threaded hole 9.21. One end of the cleaning pipe 10 has a rectangular groove 10.1 that matches the square insert 9.2. The rectangular groove 10.1 has a stepped through hole 10.11. The square insert 9.2 is inserted into the rectangular groove 10.1. The connector 9 and the cleaning pipe 10 are fixedly connected by a hexagon socket head cap screw 14 passing through the stepped through hole 10.11 and threadedly connected to the threaded hole 9.21. When disassembling, the cleaning pipe 10 can be quickly removed from the connector 9 simply by removing the hexagon socket head cap screw 14.

[0019] Before use, this device should be placed directly in front of the heat exchange tubes of the incinerator, with the support rod 6 close to the heat exchange tubes.

[0020] When using this method, the operator stands on the grating plate 2 and uses a pneumatic switch to control the synchronous extension and retraction of four hydraulic cylinders 1.3, thereby driving the mechanical movement of two scissor mechanisms 1.2 to move the frame 1.4 and grating plate 2 upwards. The operator observes whether the drill bit 11 has reached a position where it can be inserted into the heat exchange tubes. When the drill bit 11 can be inserted into the heat exchange tubes, the pneumatic switch is immediately turned off, stopping the upward movement of the lifting platform 1. The motor 8 is then turned on, causing its output shaft to rotate forward and pushing the second moving bracket 7 forward, allowing the drill bit 11 and the cleaning pipe 10 to slowly enter the heat exchange tubes to begin cleaning. During the ash removal process, the drill bit 11 is spiral-shaped, which pushes the dust into the cleaning tube 10 for collection during rotation, thus preventing dust accumulation and blockage in the heat exchange tubes. For other heat exchange tubes on the same horizontal plane, when the cleaning tube 10 is removed from the previous heat exchange tube, the position of the first moving support 5 is moved horizontally left and right, so that the drill bit 11 and the cleaning tube 10 can enter the cleaning work for the next heat exchange tube. The subsequent cleaning steps are the same as the above steps, and so on, until the cleaning process of all heat exchange tubes is finally achieved.

[0021] After cleaning, unscrew the hex bolt 14 to remove the cleaning pipe 10 from the connector 9. Tilt the end of the cleaning pipe 10 away from the drill bit 11 downwards and align it with the collection bag so that the dust in the cleaning pipe 10 falls into the collection bag for collection.

[0022] This device eliminates the need for working at heights, and the cleaning process for each heat exchanger tube takes an average of less than 5 minutes, reducing the time by 2 / 3 compared to the previous method. This significantly reduces the labor intensity of personnel and improves cleaning efficiency. It also avoids close contact between workers and the heat exchanger tubes, effectively reducing the risk of accidental burns.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A ash removal device for heat exchanger tubes in an incinerator, characterized in that: The system includes a lifting platform (1), slide rails (4), a first movable support (5), a support rod (6), a second movable support (7), a motor (8), a connector (9), a cleaning pipe (10), and a drill bit (11). Multiple slide rails (4) are fixed on the lifting platform (1). A first movable support (5) is movably mounted on the multiple slide rails (4). A support rod (6) is vertically fixed at one end of the first movable support (5). A second movable support (7) is movably mounted on the first movable support (5). A motor (8) is fixed on the second movable support (7). One end of the output shaft of the motor (8) is connected to one end of the connector (9) through a flange. The other end of the connector (9) is detachably connected to one end of the cleaning pipe (10). A drill bit (11) is fixed at the other end of the cleaning pipe (10). The drill bit (11) is made of a cross steel plate twisted into a spiral shape. The cleaning pipe (10) overlaps the top surface of the support rod (6).

2. The ash removal device for heat exchanger tubes in an incinerator according to claim 1, characterized in that: A grating plate (2) is fixed on the lifting platform (1), and a fence (3) is fixed on the upper surface of the grating plate (2).

3. The ash removal device for heat exchanger tubes in an incinerator according to claim 1, characterized in that: The lifting platform (1) includes two fixed frames (1.1), two sets of scissor mechanisms (1.2) and a frame (1.4). Each fixed frame (1.1) is connected to a set of scissor lift mechanisms (1.2), and the frame (1.4) is connected between the tops of the two sets of scissor lift mechanisms (1.2).

4. The ash removal device for heat exchanger tubes in an incinerator according to claim 3, characterized in that: The fixing frame (1.1) is provided with a connecting rod (1.11) in the middle, and two first sliding grooves (1.12) are symmetrically provided on both sides of the middle of the fixing frame (1.1). The frame (1.4) is provided with two sets of second sliding grooves (1.41) on both sides respectively, and the two second sliding grooves (1.41) in each set are symmetrically arranged. The two scissor lift mechanisms (1.2) in each group have the same structure. Each scissor lift mechanism (1.2) includes: a pair of left connecting rods (1.21), a pair of right connecting rods (1.22), a hydraulic cylinder (1.3), and a connecting shaft (1.23). The left connecting rods (1.21) and the right connecting rods (1.22) are movably connected by the connecting shaft (1.23). One end of the left connecting rod (1.21) is hinged to both ends of the fixed frame (1.1), and the other end of the left connecting rod (1.21) is hinged to the other end of the fixed frame (1.1). The end of the frame (1.4) is slidably hinged to the second slide groove (1.41) on the lower surface of the frame (1.4), one end of the right connecting rod (1.22) is slidably hinged to the first slide groove (1.12) on both sides of the fixing frame (1.1), and the other end of the right connecting rod (1.22) is hinged to the lower surface of the frame (1.4); the bottom of the hydraulic cylinder (1.3) is hinged to the middle of the connecting rod (1.11), and one end of the piston rod of the hydraulic cylinder (1.3) is hinged to the middle of the connecting shaft (1.23).

5. The ash removal device for heat exchanger tubes in an incinerator according to claim 1, characterized in that: The first movable support (5) is made by welding two long channel steels (5.1) and several short channel steels (5.2). A support rod (6) is vertically fixed on the outermost short channel steel (5.2). The top surface of the support rod (6) is an arc-shaped concave surface (6.1). Three pairs of first traveling wheels (12) are fixed on the lower surfaces of the two long channel steels (5.1). The first traveling wheels (12) move on the slide rail (4).

6. The ash removal device for heat exchanger tubes in an incinerator according to claim 5, characterized in that: The bottom of the second movable support (7) is fixed with four second traveling wheels (13), which move on the long channel steel (5.1).

7. The ash removal device for heat exchanger tubes in an incinerator according to claim 1, characterized in that: The connector (9) is welded from a flange (9.1) and a square insert (9.2). The square insert (9.2) has a threaded hole (9.21). One end of the cleaning pipe (10) has a rectangular groove (10.1) that matches the square insert (9.2). The rectangular groove (10.1) has a stepped through hole (10.11). The square insert (9.2) is inserted into the rectangular groove (10.1). The connector (9) and the cleaning pipe (10) are fixedly connected by threaded connection through the stepped through hole (10.11) and the threaded hole (9.21) by an internal hex bolt (14).

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