TWI835446B - Reciprocating smoke tube scraping device - Google Patents

Abstract

This creation is a reciprocating smoke tube scraping device, which includes a smoke tube, a driver, a screw and a scraper. The smoke tube is connected to the cracking furnace. The screw is arranged in the smoke tube along the axial direction of the smoke tube and is connected to the driver. The screw is a reciprocating screw and It includes first and second spiral rails with opposite spiral directions. The scraper includes a reciprocating nut screwed to the screw. When the screw is driven by the driver and rotates in a fixed direction, it can drive the reciprocating nut sequentially and cyclically along the first and second screw rails. The two spiral rails move to make the scraper move back and forth in the smoke tube to scrape off the smoke, oil glue and other impurities attached to the inner wall of the smoke tube to keep the smoke tube smooth and prevent the cracking furnace and smoke tube from being blocked by the smoke tube. The positive pressure relative to the outside world prevents the smoke tube from bursting and reduces the risk of industrial safety accidents.

Description

Reciprocating smoke tube scraping device

This invention relates to cracking furnaces, and in particular to a reciprocating smoke tube scraping device.

Thermal cracking refers to a reaction in which substances undergo thermal decomposition in a nearly anaerobic state. The common equipment used for thermal cracking reactions is a cracking furnace. The cracking furnace is connected to a smoke tube and connected to a vacuum device through the smoke tube. The vacuum device extracts the gas generated by the thermal cracking reaction in the cracking furnace through the smoke tube and keeps the inside of the cracking furnace in a vacuum, that is, an oxygen-free state, so that the thermal cracking reaction can continue stably.

However, during the operation of the cracking furnace, gas is extracted through the smoke tube, and there are often smoke, oil, glue and other impurities attached to the wall of the smoke tube, which makes the smoke tube easily blocked. Once the smoke tube is blocked, the gas If it cannot be discharged normally, the cracking furnace and the smoke tube will be in a positive pressure state relative to the outside world, which may cause explosions in the smoke tube and cause industrial safety accidents.

In order to solve the problem that the smoke tube is easily blocked, which may cause explosions at the smoke tube and cause industrial safety accidents, the purpose of this creation is to propose a method that can instantly scrape off the smoke dust, oil glue and other impurities attached to the wall of the smoke tube, keeping the A reciprocating smoke tube scraping device that keeps the smoke tube clear.

The reciprocating smoke tube scraping device proposed by this invention to solve the technical problem includes: a smoke tube, which includes a connecting end and a tail end in opposite positions, and an inner tube wall. The connecting end is used to connect to a cracking furnace. , allowing the smoke tube to communicate with the inside of the cracking furnace; a driver; A screw, which is connected to the driver and can be driven to rotate by the driver. The screw is provided in the smoke pipe along an axial direction of the smoke pipe and extends toward the connecting end and tail end of the smoke pipe. The screw is A reciprocating screw, and includes a first spiral rail and a second spiral rail with opposite spiral directions, the first spiral rail and the second spiral rail are connected at both ends adjacent to the screw; and a scraper, It includes a reciprocating nut, which is screwed to the screw; wherein, when the screw is driven by the driver and rotates in a fixed direction, it can drive the reciprocating nut sequentially and cyclically along the first spiral track of the screw and The movement of the second spiral rail allows the scraper to move back and forth in the smoke tube to scrape off substances attached to the inner wall of the smoke tube.

The reciprocating smoke tube scraping device, wherein the smoke tube includes a connecting part, the scraper can move along the screw to the connecting part, the reciprocating smoke tube scraping device includes a collection pipe and a slag removal tank , the collection pipe extends downward from the connecting part of the smoke pipe and is connected to the smoke pipe. The slag removal tank is connected to the bottom of the collection pipe, and the inside of the slag removal tank is connected to the collection pipe.

The reciprocating smoke tube scraping device includes at least one cleaning nozzle. The at least one cleaning nozzle is provided on the collection tube and is disposed toward the central axis of the connecting portion of the smoke tube. The scraper moves to the smoke tube. The connecting portion can be cleaned by the fluid ejected from the at least one cleaning nozzle.

The reciprocating smoke tube scraping device includes a plurality of cleaning nozzles.

The reciprocating smoke tube scraping device includes an air extraction pipe, which is connected to and communicates with the smoke pipe, and the connection point between the air extraction pipe and the smoke pipe is located at the connecting part of the smoke pipe and the smoke pipe. Between the connecting ends of the smoke pipe.

In the reciprocating smoke tube scraping device, the scraper is provided with at least one air hole, and the at least one air hole is arranged along the axial direction of the scraper.

In the reciprocating smoke tube scraping device, the scraper includes a plurality of air holes, the plurality of air holes surround the center of the scraper, and the plurality of air holes are distributed at equal angles.

The reciprocating smoke tube scraping device, wherein the smoke tube includes at least one positioning groove, the at least one positioning groove is recessed in the inner wall of the smoke tube and extends along the axial direction of the smoke tube Thus, the scraper is provided with at least one positioning protrusion, and the at least one positioning protrusion is embedded in at least one positioning groove of the smoke tube.

In the reciprocating smoke tube scraping device, a gap is formed between the peripheral edge of the scraper and the inner tube wall of the smoke tube.

The improvement achieved by the technical means of this invention is that the reciprocating smoke tube scraping device of this invention utilizes the screw connected to the driver and the scraper screwed to the screw, so that the scraper can move along the The screw moves back and forth inside the smoke tube, constantly scraping off impurities such as smoke, oil and glue adhering to the inner wall of the smoke tube, keeping the smoke tube open, and allowing the gas generated inside the cracking furnace to continuously flow By extracting the smoke tube without clogging, the cracking furnace and the smoke tube are prevented from having a positive pressure relative to the outside due to blockage of the smoke tube, thereby preventing the smoke tube from bursting and significantly reducing the risk of industrial safety accidents.

10: Smoke tube

11:Connection end

12:Tail end

13:Connection Department

14:Inner tube wall

15: Positioning groove

20:Drive

30:Screw

31: First spiral track

32:Second spiral rail

33: Fixtures

40:Scraper

401:Reciprocating nut

402: Board

41:Screw hole

42: pores

43: Positioning convex part

50: Collection tube

60: Slag removal tank

70: Clean the nozzle

80:Pumping and taking over

90: Cracking furnace

Figure 1 is a schematic front cross-sectional view of the structure of the preferred embodiment of this invention.

Figure 2 is a side cross-sectional view of the smoke tube and scraper of the preferred embodiment of the present invention.

Figure 3 is a front cross-sectional view of the smoke tube and scraper of the preferred embodiment of the present invention.

Figures 4-6 are schematic diagrams of the action of the preferred embodiment of this invention.

In order to understand the technical characteristics and practical effects of this invention in detail, and to realize it according to the content of the invention, the preferred embodiment as shown in the figure is further described in detail as follows: As shown in Figure 1, the preferred embodiment of this invention The reciprocating smoke tube scraping device of the embodiment includes a smoke tube 10, a driver 20, a screw 30 and a scraper 40. The smoke tube 10 is connected to a cracking Furnace 90 , the screw 30 is disposed inside the smoke tube 10 and connected to the driver 20 , and the scraper 40 is disposed on the screw 30 .

The smoke tube 10 is used to connect the inside of the cracking furnace 90 to a vacuum device, so that the gas generated by the reaction inside the cracking furnace 90 can pass through the smoke tube 10 and be ejected from the cracking device by the vacuum device. The inside of the furnace 90 is extracted, as shown in Figure 1. The smoke tube 10 includes a connecting end 11 and a tail end 12 at opposite positions, a connecting portion 13, and an inner tube wall 14. The connecting end 11 is connected to the Cracking furnace 90 , the tail end 12 is far away from the cracking furnace 90 relative to the connecting end 11 , the connecting part 13 is located adjacent to the tail end 12 of the smoke pipe 10 , and an exhaust pipe 80 is connected from the connecting part of the smoke pipe 10 13 extends upward, and the exhaust pipe 80 is connected to the inside of the smoke tube 10 and to a vacuum device. Since the vacuum device is a common technology in the relevant fields, it will not be described and drawn in detail in the description and drawings. .

As shown in Figure 1, the driver 20 is disposed at the tail end 12 of the smoke tube 10. The screw 30 is connected to the driver 20 and can be driven to rotate by the driver 20. Specifically, the driver 20 is a servo motor. , can accurately and quickly control the steering and rotation speed of the screw 30, making the operation of the reciprocating smoke tube scraping device more precise and controllable; the screw 30 is arranged inside the smoke tube 10 along one axis of the smoke tube 10, To be precise, the screw 30 is disposed along the central axis of the smoking tube 10 , and the screw 30 extends along the central axis of the smoking tube 10 toward the connecting end 11 and the tail end 12 of the smoking tube 10 . Specifically, , in the preferred embodiment of the present invention, one end of the opposite ends of the screw 30 is connected to the driver 20, and the other end extends toward the connecting end 11 of the smoking pipe 10 to protrude from the connecting end 11, and the protruding end is It extends to the inside of the cracking furnace 90 and is supported and positioned by a fixing piece 33. The fixing piece 33 is elongated and includes two opposite ends. The fixing piece 33 is connected to one end of the screw 30 and is located on the The inside of the cracking furnace 90 and the two ends of the fixing member 33 are respectively against the inner furnace wall of the cracking furnace 90 to support and position the screw 30 so that the screw 30 can be fixed in the center of the smoke tube 10 axis.

As shown in FIGS. 1 to 3 , the scraper 40 has a disk-shaped structure and includes a screw hole 41 , which runs through the center of the scraper 40 along the axial direction of the scraper 40 . The scraper 40 can The screw hole 41 is screwed into the screw rod 30, so that the scraper 40 is coaxially arranged with the screw rod 30, and the scraper 40 can reciprocate along the screw rod 30 as the screw rod 30 rotates, as shown in Figure 2 , the peripheral edge of the scraper 40 is adjacent to the inner tube wall 14 of the smoke tube 10 , so that a gap is formed between the inner tube wall 14 of the smoke tube 10 and the scraper 40 .

The operation process of the reciprocating smoke tube scraping device according to the preferred embodiment of this invention is as follows: First, as shown in Figure 1 , the scraper 40 is located at the connecting portion 13 of the smoke tube 10 , here it is regarded as the scraper 40 At a starting position, when the cracking reaction is carried out inside the cracking furnace 90 and gas is generated, the vacuum device will continuously extract the gas from the inside of the cracking furnace 90 through the smoke tube 10 and the exhaust pipe 80. At this time, smoke, oil glue and other impurities will continue to adhere to the inner tube wall 14 of the smoke tube 10 . Therefore, when the cracking furnace 90 is operating, the driver 20 is started at the same time, and the driver 20 drives the screw 30 Rotate, as shown in FIG. 4 , first move the scraper 40 along the screw 30 toward the connecting end 11 of the smoke tube 10 , that is, toward the inside of the cracking furnace 90 , and move the scraper 40 attached to the smoke tube 10 The smoke, oil, glue and other impurities on the inner pipe wall 14 are scraped off.

As shown in FIGS. 1 and 4 , in the preferred embodiment of the present invention, since the screw 30 protrudes from the connecting end 11 of the smoke tube 10 and protrudes into the inside of the cracking furnace 90 , the scraper 40 can move along the As the screw 30 moves and enters the inside of the cracking furnace 90, the oil glue and other impurities scraped up by the scraper 40 can enter the inside of the cracking furnace 90 and fall back to the cracking furnace. Inside the cracking furnace 90 , the oil glue can undergo cracking reaction again inside the cracking furnace 90 .

As shown in Figure 2, in the preferred embodiment of the present invention, the scraper 40 is adjacent to the inner tube wall 14 of the smoke tube 10 rather than against the inner tube wall 14 of the smoke tube 10, which ensures that the scraper 40 40 moves smoothly along the screw 30 inside the smoking tube 10 without rubbing against the inner tube wall 14 of the smoking tube 10 , and the scraper 40 scrapes off the inner tube wall 14 attached to the smoking tube 10 When there are impurities, most of the impurities can still be scraped off, leaving only a thin impurity layer, and the thin impurity layer will not affect the operation of the smoke tube 10. The gas can still smoothly pass through the smoke tube 10 and the exhaust pipe 80 and be extracted from the inside of the cracking furnace 90 by the vacuum device.

In addition, as shown in FIG. 2 , in the preferred embodiment of the present invention, the scraper 40 is provided with a plurality of air holes 42 , and each air hole 42 is arranged along the axial direction of the scraper 40 . When the inside of the smoke tube 10 moves to block the gas, the gas can still be extracted from the inside of the cracking furnace 90 by the vacuum device through the plurality of air holes 42; in other embodiments, only a single one can be provided. The air hole 42 or the air hole 42 may not be provided, but by controlling the operating time of the scraper 40 to prevent the cracking furnace 90 and the smoke tube 10 from having too high a positive pressure relative to the outside world, and It is not limited to the preferred embodiment of the present invention; the advantage of the preferred embodiment of the present invention is that it can further prevent gas blockage in the smoke tube 10 when the scraper 40 is operated, thereby greatly reducing the risk of industrial safety accidents; Preferably, the plurality of air holes 42 are arranged around the center of the scraper 40, that is, around the screw hole 41, and the plurality of air holes 42 are distributed at equal angles, allowing gas to impact the scraper 40 and pass through the plurality of air holes 42. When the air holes 42 are removed, the scraper 40 is evenly stressed and will not easily shake.

In addition, as shown in Figures 2 and 3, in the preferred embodiment of the present invention, the smoking tube 10 also includes two positioning grooves 15, and the two positioning grooves 15 are recessed in the inner wall of the smoking tube 10 14, and extends along the axial direction of the smoke tube 10, the two positioning grooves 15 are opposite up and down, the scraper 40 is provided with two positioning protrusions 43 on its periphery, and the two positioning protrusions 43 are respectively embedded in the The two positioning grooves 15 of the smoking tube 10, when the scraper 40 moves along the screw 30 inside the smoking tube 10, through the matching of the two positioning grooves 15 and the two positioning protrusions 43, the scraper 40 can be The plate 40 is maintained at a fixed angle and will not be affected by gas push or other external forces to rotate relative to the screw 30 and move along the screw 30 . It can only move along the screw 30 when the driver 20 drives the screw 30 to rotate. movement, so that the movement process and position of the scraper 40 can be completely stable and controlled; in other embodiments, only one set of the positioning grooves 15 and the positioning protrusions 43 can be provided, or multiple positions can be provided. The combination of the positioning groove 15 and the positioning protrusion 43 is not limited to the preferred embodiment of the present invention.

As shown in FIGS. 4 and 5 , the driver 20 is then allowed to drive the screw 30 to rotate in the opposite direction to the previous one, and the scraper 40 can move from the inside of the cracking furnace 90 toward the original starting position, and again The smoke, oil, glue and other impurities attached to the inner tube wall 14 of the smoke tube 10 are scraped off, as shown in Figures 1 and 5. In the preferred embodiment of the invention, the reciprocating smoke tube scraping device also includes A collection pipe 50 and a slag removal tank 60. The collection pipe 50 extends downward from the connecting portion 13 of the smoke tube 10 and is connected with the smoke pipe 10. The slag removal tank 60 is connected to the bottom of the collection pipe 50, And the inside of the slag removal tank 60 is connected with the collection pipe 50. When the scraper 40 moves back to the starting position, part of the scraped smoke, oil glue and other impurities can fall from the scraper 40. It falls into the slag removal tank 60 through the collection pipe 50 for collection, so as to facilitate the re-insertion of the cracking furnace 90 for cracking reaction or other subsequent processing operations. In other embodiments, the collection pipe 50 and The combination of the slag removal tank 60 and the screw 30 protruding from the connecting end 11 of the smoke tube 10 and protruding into the interior of the cracking furnace 90 can ensure that the scraper 40 will be attached The smoke, oil, glue and other impurities on the inner tube wall 14 of the smoke tube 10 are scraped off and moved to other places to avoid clogging of the smoke tube 10 .

As shown in Figures 1 and 6, in the preferred embodiment of the present invention, the reciprocating smoke tube scraping device also includes a plurality of cleaning nozzles 70, and the plurality of cleaning nozzles 70 are respectively installed on the collection pipe 50 and the exhaust pipe. The gas pipe 80 is respectively provided from the collection pipe 50 and the exhaust pipe 80 toward the central axis of the connecting part 13 of the smoke pipe 10, and each cleaning nozzle 70 can be connected to a fluid supply source, such as a gas supply source or It is a water supply source. As shown in Figure 6, after the scraper 40 moves back to the starting position, the driver 20 stops operating and the screw 30 stops rotating, allowing the scraper 40 to stay in the starting position for about twenty seconds. To thirty seconds, during this period, the plurality of cleaning nozzles 70 can spray fluid from different angles toward the central axis of the connecting portion 13 of the smoke tube 10 , that is, toward the scraper 40 , thereby adhering to the periphery of the scraper 40 , the smoke dust, oil glue and other impurities on the hole walls of the plurality of air holes 42 are removed, so that the scraper 40 can continue to scrape off the smoke dust, oil glue and other impurities attached to the inner tube wall 14 of the smoke tube 10. Each air hole 42 can remain open, thereby allowing gas to continue to pass when the scraper 40 moves.

Finally, as shown in FIG. 3 , the scraper 40 moves from the starting position along the screw 30 toward the inside of the cracking furnace 90 , and by analogy, the scraper 40 can continuously remove the inner tube attached to the smoke tube 10 The smoke, oil, glue and other impurities on the wall 14 are scraped off to keep the smoke tube 10 open, so that the gas generated inside the cracking furnace 90 can be continuously extracted through the smoke tube 10 without clogging, thus preventing the The cracking furnace 90 and the smoke tube 10 have a positive pressure relative to the outside due to the blockage of the smoke tube 10, thereby preventing the smoke tube 10 from bursting and reducing the risk of industrial safety accidents.

As shown in Figures 1 and 3, in the preferred embodiment of the present invention, the screw 30 is a reciprocating screw, which includes a first spiral rail 31 and a second spiral rail 32. The first spiral rail 31 is concave The second spiral rail 32 is disposed on an outer peripheral surface of the screw rod 30 and extends helically from one end of the screw rod 30 to the other end of the screw rod 30 . The second spiral rail 32 is also recessed on the outer peripheral surface of the screw rod 30 and extends from the screw rod 30 One end of the screw 30 spirally extends to the other end of the screw 30, and the spiral direction of the second spiral rail 32 is opposite to the spiral direction of the first spiral rail 31, so that the first spiral rail 31 and the second spiral rail 32 have A plurality of intersection points, and the first spiral rail 31 and the second spiral rail 32 are connected at both ends adjacent to the screw 30; as shown in Figure 2, the scraper 40 includes a reciprocating nut 401 and a plate Body 402. The reciprocating nut 401 is a nut that matches the reciprocating screw. It includes a body and a screw member that can be pivoted on the body. The screw hole 41 matches the reciprocating screw, and the reciprocating nut 401 is formed by a combination hole in the center of the body and the screw member protruding from the combination hole. The screw member can move along the first spiral rail 31 or the second spiral rail 32. The plate body 402 Fastened to the reciprocating nut 401, the plurality of air holes 42 are penetrated through the plate body 402.

During operation, when the driver 20 drives the screw 30 to rotate in a certain direction, the threaded member of the reciprocating nut 401 first moves relative to the screw 30 along the first spiral rail 31 so that the scraper 40 moves toward the screw 30 . One end of the screw 30 moves, and when the scraper 40 is close to one end of the screw 30 , since the first spiral rail 31 and the second spiral rail 32 are connected adjacent to either end of the screw 30 , the reciprocating motion The threaded part of the nut 401 will be rotated by the third screw when the rotation direction of the screw 30 remains unchanged. A spiral rail 31 enters the second spiral rail 32 whose spiral direction is opposite to the first spiral rail 31, so that the scraper 40 can move toward the screw from one end close to the screw 30 in the opposite direction to the original moving direction. The other end of the screw 30 moves, and when the scraper 40 is close to the other end of the screw 30, in the same way, the threaded part of the reciprocating nut 401 will also move from the screw 30 to the screw 30 while the rotation direction of the screw 30 remains unchanged. The second spiral rail 32 returns to the first spiral rail 31 whose spiral direction is opposite to the second spiral rail 32, so that the scraper 40 moves in the original moving direction.

Thereby, as shown in FIGS. 4 to 6 , when the screw 30 is driven by the driver 20 and continues to rotate in a fixed direction, the threaded parts of the reciprocating nut 401 can sequentially and cyclically move along the first The movement of the spiral rail 31 and the second spiral rail 32 causes the scraper 40 to reciprocate along the screw 30 in the smoke tube 10; the detailed structure of the reciprocating screw and the reciprocating nut is in the prior art and is not shown in the drawings. Specially drawn in.

In other embodiments, the screw 30 can also be other types of screws and the screw hole 41 can be other types of screw holes, so that the scraper 40 can reciprocate along the screw 30 in the smoke tube 10. The advantage of the preferred embodiment of this invention is that the driver 20 only needs to drive the screw 30 to rotate in a certain fixed direction to achieve the effect of causing the scraper 40 to reciprocate along the screw 30 in the smoke tube 10. There is no need to change the direction in which the driver 20 drives the screw 30 to rotate, making the operation process simpler and conducive to automating the operation of the reciprocating smoke tube scraping device.

In the preferred embodiment of the present invention, the air extraction pipe 80 is connected to the connecting portion 13 of the smoke tube 10 . In fact, in other embodiments, as long as the connection point between the air extraction pipe 80 and the smoke pipe 10 The scraper 40 is located between the connecting portion 13 of the smoke tube 10 and the connecting end 11 of the smoke tube 10 . When the scraper 40 moves between the inside of the cracking furnace 90 and the connecting portion 13 , the scraper 40 can move the smoke tube 10 The part of the inner tube wall 14 located between the exhaust pipe 80 and the cracking furnace 90 is scraped to remove the attached smoke, oil glue and other impurities, thereby allowing the gas generated inside the cracking furnace 90 to The smoke tube 10 and the exhaust pipe 80 can be stably extracted by the vacuum device, and the effect of avoiding clogging of the smoke tube 10 can also be achieved.

The above are only preferred embodiments of the present invention and do not impose any formal restrictions on the present invention. Anyone with ordinary knowledge in the technical field can use the present invention without departing from the scope of the technical solution proposed by the present invention. Equivalent embodiments with partial changes or modifications to the technical content disclosed in the creation, and which do not deviate from the content of the technical solution of this creation, still fall within the scope of the technical solution of this creation.

10: Smoke tube

11:Connection end

12:Tail end

13:Connection Department

14:Inner tube wall

20:Drive

30:Screw

33: Fixtures

40:Scraper

42: pores

50: Collection tube

60: Slag removal tank

70: Clean the nozzle

80:Pumping and taking over

90: Cracking furnace

Claims (9)

A reciprocating smoke tube scraping device, which includes: a smoke tube, which includes a connecting end and a tail end at opposite positions, and an inner tube wall. The connecting end is used to connect a cracking furnace so that the smoke tube communicates with all The inside of the cracking furnace; a driver; a screw, which is connected to the driver and can be driven to rotate by the driver. The screw is located in the smoke tube along an axial direction of the smoke tube and faces the connecting end of the smoke tube. Extending from the tail end, the screw is a reciprocating screw and includes a first spiral rail and a second spiral rail with opposite spiral directions. The first spiral rail and the second spiral rail are adjacent to both ends of the screw. are all connected; and a scraper, which includes a reciprocating nut, which is screwed to the screw; wherein, when the screw is driven by the driver and rotates in a fixed direction, it can drive the reciprocating nut sequentially and cyclically along the The scraper moves along the first spiral rail and the second spiral rail of the screw, so that the scraper can move back and forth in the smoke tube to scrape off substances attached to the inner wall of the smoke tube. The reciprocating smoke tube scraping device according to claim 1, wherein the smoke tube includes a connecting part, and the scraper can move to the connecting part along the screw. The reciprocating smoke tube scraping device includes a collection tube and A slag removal tank, the collection pipe extends downward from the connecting part of the smoke pipe, and is connected to the smoke pipe, the slag removal tank is connected to the bottom of the collection pipe, and the inside of the slag removal tank is connected to the collection pipe . The reciprocating smoke tube scraping device according to claim 2, which includes at least one cleaning nozzle. The at least one cleaning nozzle is provided on the collection tube and is disposed toward the central axis of the connecting part of the smoke tube. The scraper moves. When reaching the connection part of the smoke pipe, it can be cleaned by the fluid sprayed by the at least one cleaning nozzle. The reciprocating smoke tube scraping device according to claim 3, which includes a plurality of the cleaning nozzles. The reciprocating smoke pipe scraping device as described in claim 2, which includes an air extraction pipe, which is connected to and connected with the smoke pipe, and the connection point between the air pipe and the smoke pipe is located at the connection point of the smoke pipe. between the connecting end of the smoke tube and the The reciprocating smoke tube scraping device according to any one of claims 1 to 5, wherein the scraper is provided with at least one air hole, and the at least one air hole is provided along the axial direction of the scraper. The reciprocating smoke tube scraping device according to claim 6, wherein the scraper includes a plurality of the air holes, the plurality of air holes surround the center of the scraper, and the plurality of air holes are distributed at equal angles. The reciprocating smoke tube scraping device according to any one of claims 1 to 5, wherein the smoke tube includes at least one positioning groove, and the at least one positioning groove is recessed in the inner tube wall of the smoke tube, And extending along the axial direction of the smoke tube, the scraper is provided with at least one positioning convex portion, and the at least one positioning convex portion is embedded in at least one positioning groove of the smoke tube. The reciprocating smoke tube scraping device according to any one of claims 1 to 5, wherein a gap is formed between the peripheral edge of the scraper and the inner tube wall of the smoke tube.

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