Gun barrel structure for boiler flue soot blower and boiler flue soot blower

Abstract

The invention discloses a gun barrel structure for a boiler flue soot blower and the boiler flue soot blower, and relates to the technical field of soot blowers. The gun barrel structure for the boiler flue soot blower comprises a gun barrel body capable of extending into a flue body, two symmetrically-arranged gas ejector pipes are arranged on the gun barrel body, and the gun barrel structure further comprises an elastic communication mechanism arranged on the side wall of the gun barrel body and used for elastically communicating the gas ejector pipes with the gun barrel body; the elastic communicating mechanism comprises two symmetrically-arranged fixing pipes which communicate with the side wall of the gun barrel body, and the fixing pipes communicate with the air spraying pipe through hoses. And the supporting assembly is arranged between the gun barrel body and the flue body. According to the gun barrel structure for the boiler flue soot blower and the boiler flue soot blower, the suspended end of the gun barrel body can be supported and limited, meanwhile, when the gas spraying pipe sprays gas, the counter-acting force can be buffered, deformation of the gun barrel body is avoided, and the soot blowing effect and the service life are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of sootblower technology, specifically to a gun barrel structure for a boiler flue sootblower and a boiler flue sootblower. Background Technology

[0002] Over long-term operation, boilers accumulate ash and coke on their heating surfaces, deteriorating heat transfer. Therefore, after a period of operation, soot blowing is necessary to clean the heating surfaces. The telescopic soot blower is the most common soot blowing equipment used in coal-fired power plant boilers. It mainly consists of a frame, telescopic barrel, trolley, rack and pinion track, and wall box. During operation, the trolley rotates and extends the barrel into the boiler, continuously ejecting high-pressure gas from the nozzle at the barrel's tip to blow soot from the boiler's heating surfaces. After soot blowing is complete, the trolley pulls the barrel out of the flue.

[0003] Because the boiler has a very large internal space, the gun barrel needs to be extended a long way to reach the middle of the boiler. In addition, the high-pressure gas has a great reaction force on the front end of the gun barrel, which can easily cause the gun barrel to deform and cause the purging range to deviate. At the same time, the deformed gun barrel is prone to jamming and collision during extension, retraction or rotation, which affects the soot blowing effect and service life. Summary of the Invention

[0004] The purpose of this invention is to provide a gun barrel structure for a boiler flue sootblower and a boiler flue sootblower to solve the problems mentioned in the background art.

[0005] In a first aspect of the invention, a gun barrel structure for a boiler flue sootblower is provided, comprising a gun barrel body extendable into a flue body, wherein two symmetrically arranged jet pipes are disposed on the gun barrel body, and the gun barrel structure further comprises: An elastic connecting mechanism is provided on the side wall of the barrel body for elastically connecting the jet pipe and the barrel body; The flexible communication mechanism includes: Two symmetrically arranged fixed tubes are connected to the side wall of the barrel body, and the fixed tubes are connected to the jet pipe through a flexible tube; A support assembly is disposed between the barrel body and the flue body to support the barrel body; A buffer assembly is disposed between the jet pipe and the support assembly, which enables the jet pipe to buffer when it is subjected to the reaction force of high-pressure gas.

[0006] Preferably, the support assembly includes: A circular ring is fixed to the end of the barrel body via a first connecting rod; Two first guide rods are fixed inside the flue body; The slider slides against the side wall of the first guide rod; The support ring rotates on the side wall of the ring and is fixed to the slider.

[0007] Preferably, the buffer component includes: The liquid storage tank is fixed to the end of the ring by a mounting ring, and the liquid storage tank is filled with damping fluid; A sliding plate slides inside the liquid storage tank, and the side wall of the sliding plate has multiple through holes; The first moving component is connected between the jet pipe and the sliding plate, and is used to drive the sliding plate to move in the liquid storage tank. When the sliding plate moves, the damping fluid can flow through the through hole and be buffered. The first moving component includes: The first movable plate is connected to the side wall of the jet pipe via a connecting ring; Two second guide rods are connected between the first movable plate and the sliding plate, and the second guide rods are installed through the side wall of the liquid storage tank; The first elastic element is sleeved on the side wall of each of the second guide rods, and the two ends of the first elastic element are fixed to the sliding plate and the liquid storage tank, respectively.

[0008] Preferably, the barrel structure further includes: A drive mechanism, mounted on the fixed tube, is used to drive the jet pipe to rotate; The drive mechanism includes: A rotating tube is inserted into the end of the fixed tube; An annular groove is formed on the side wall of the jet pipe; A roller is fixed to the end of the rotating tube; The power unit is located inside the fixed tube and is used to drive the rotating tube to rotate. When the rotating tube rotates, the roller can roll in the annular groove and drive the jet pipe to rotate.

[0009] Preferably, the power assembly includes: The first connecting plate is fixed to the inner wall of the fixed tube; The fan rotates on the side wall of the first connecting plate via the first rotating shaft; The transmission mechanism is located between the first rotating shaft and the rotating tube. When the fan drives the first rotating shaft to rotate, the transmission mechanism can drive the rotating tube to rotate.

[0010] Preferably, the transmission mechanism includes: The first driving bevel gear is fixed to the end of the first rotating shaft; An L-shaped plate is fixed to the top of the first connecting plate; The second rotating shaft rotates at the top of the L-shaped plate; The first driven bevel gear is fixed to the lower end of the second rotating shaft and meshes with the first driving bevel gear; The second driving bevel gear is fixed to the upper end of the second rotating shaft; The second connecting plate is fixed to the inner wall of the fixed tube; The second driven bevel gear rotates on the side wall of the second connecting plate via the third rotating shaft and is meshed with the second driving bevel gear; A connecting component is disposed between the third rotating shaft and the rotating tube.

[0011] Preferably, the connection component includes: An internal spline is formed on the inner wall of the rotating tube; An external spline is provided on the side wall of the third rotating shaft, allowing the external spline to slide within the internal spline.

[0012] Preferably, the barrel structure further includes: A cleaning mechanism, located inside the fixed pipe, is used to perform reverse cleaning of the jet pipe; The cleaning mechanism includes: The second moving component is disposed inside the fixed tube, and a second moving plate is connected to the second moving component for driving the second moving plate to move. The cleaning ring is fixed to the side wall of the second movable plate by the second connecting rod. When the second movable component drives the second movable plate to move, the cleaning ring can clean the jet pipe in reverse.

[0013] Preferably, the second moving component includes: Two T-shaped guide rods are fixed to the ends of the fixed tube; A sliding block is fitted onto the side wall of the T-shaped guide rod and connected to the second moving plate; Two second elastic elements are sleeved on the sidewall of each of the T-shaped guide rods; A push block is fixed to the side wall of the sliding block, and the push block includes an inclined surface; A push rod is inserted into the side wall of the fixed tube; A retaining ring is fixedly sleeved on the side wall of the push rod; The third elastic element is sleeved on the side wall of the push rod, and both ends of the third elastic element are fixed to the retaining ring and the fixing tube, respectively. The protective cover is fixed to the inner wall of the flue body, and a storage cavity is provided inside the protective cover. When one end of the push rod abuts against the end of the storage cavity, the other end of the push rod can slide on the inclined surface, and the support ring can abut against the end of the protective cover.

[0014] In a second aspect of the invention, a boiler flue soot blower is provided, comprising the gun barrel structure for a boiler flue soot blower described in the first aspect above.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This type of boiler flue sootblower gun barrel structure and boiler flue sootblower, by setting support components and buffer components, can support and limit the suspended end of the gun barrel body. At the same time, when the jet pipe sprays air, it can buffer the reaction force to avoid deformation of the gun barrel body, thus ensuring the sootblowing effect and service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the usage state of the present invention; Figure 2 This is a schematic diagram showing the location of the buffer component in this invention; Figure 3 This is a partial cross-sectional view of the fixing tube and the liquid storage tank in this invention; Figure 4 This is a schematic diagram of the internal structure of the fixed tube in this invention; Figure 5 This is a cross-sectional view of the connecting rod, the ring, and the support ring in this invention. Figure 6 This is a schematic diagram of the cleaning mechanism in this invention; Figure 7 This is a schematic diagram of the connecting components in the invention.

[0017] In the diagram: 1. Flue body; 201. Liquid storage tank; 202. First moving plate; 203. Sliding plate; 204. Through hole; 205. Connecting ring; 206. First elastic element; 207. Mounting ring; 208. Second guide rod; 301. Cleaning ring; 302. Second connecting rod; 303. Second moving plate; 401. Annular groove; 402. Rotating tube; 403. Roller; 501. First connecting plate; 502. First rotating shaft; 503. Fan; 601. First driving bevel gear; 602. L-shaped plate; 603. Second rotating shaft; 604. Second driving bevel gear; 605. Second... Connecting plate; 606, Third rotating shaft; 607, Second driven bevel gear; 608, First driven bevel gear; 701, External spline; 702, Internal spline; 801, Sliding block; 802, T-shaped guide rod; 803, Second elastic element; 804, Pushing block; 805, Inclined surface; 806, Push rod; 807, Protective cover; 808, Receiving cavity; 809, Retaining ring; 810, Third elastic element; 901, Sliding block; 902, First guide rod; 10, Barrel body; 11, Fixing tube; 12, Jet pipe; 13, Hose; 14, First connecting rod; 15, Circular ring; 16, Support ring. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1-7 This invention provides a gun barrel structure for a boiler flue soot blower, including a gun barrel body 10 that can extend into the flue body 1, and two symmetrically arranged jet pipes 12 disposed on the gun barrel body 10. The gun barrel structure further includes: An elastic connecting mechanism is provided on the side wall of the barrel body 10 for elastically connecting the jet pipe 12 and the barrel body 10. Flexible connectivity mechanisms include: Two symmetrically arranged fixed tubes 11 are connected to the side wall of the barrel body 10, and the fixed tubes 11 are connected to the jet pipe 12 through the hose 13; A support assembly is disposed between the barrel body 10 and the flue body 1 to support the barrel body 10. The buffer assembly is located between the jet pipe 12 and the support assembly. When the jet pipe 12 is subjected to the reaction force of high-pressure gas, the buffer assembly can buffer the reaction force and support and limit the suspended end of the barrel body 10. At the same time, when the jet pipe 12 sprays gas, it can buffer the reaction force to prevent the barrel body 10 from deforming and ensure the soot blowing effect and service life.

[0020] Please see Figure 1 and 2 The support assembly includes: The ring 15 is fixed to the end of the barrel body 10 via the first connecting rod 14; Two first guide rods 902 are fixed inside the flue body 1; Slider 901 slides on the side wall of the first guide rod 902; The support ring 16 rotates on the side wall of the ring 15 and is fixed to the slider 901. When the barrel body 10 moves, it can drive the ring 15 to rotate within the support ring 16 through the first connecting rod 14. At the same time, it drives the slider 901 to slide along the first guide rod 902. At this time, it can support and limit the suspended end of the barrel body 10, reduce the bending deformation of the barrel body 10, and ensure its performance and service life.

[0021] Please see Figure 2 and Figure 3 The buffer components include: The liquid storage tank 201 is fixed to the end of the ring 15 by the mounting ring 207, and the liquid storage tank 201 is filled with damping fluid. The sliding plate 203 slides inside the liquid storage tank 201, and the side wall of the sliding plate 203 is provided with multiple through holes 204; The first moving component is connected between the jet pipe 12 and the sliding plate 203, and is used to drive the sliding plate 203 to move within the liquid storage tank 201. When the sliding plate 203 moves, the damping fluid can flow through the through hole 204 and be buffered. The first moving component includes: The first movable plate 202 is connected to the side wall of the jet pipe 12 via a connecting ring 205, and the connecting ring 205 rotates on the side wall of the jet pipe 12. Two second guide rods 208 are connected between the first moving plate 202 and the sliding plate 203, and the second guide rods 208 are installed through the side wall of the liquid storage tank 201; The first elastic element 206, which can be a spring, is sleeved on the side wall of each second guide rod 208. Both ends of the first elastic element 206 are fixed to the sliding plate 203 and the liquid storage tank 201, respectively. When high-pressure gas is ejected through the jet pipe 12, the jet pipe 12 will be subjected to a reaction force. At this time, the jet pipe 12 moves towards the fixed pipe 11. At the same time, the hose 13 deforms. When the jet pipe 12 moves, it can drive the first moving plate 202 to move through the connecting ring 205 and drive the sliding plate 203 to slide in the liquid storage tank 201 through the second guide rod 208. At the same time, the damping fluid flows along the through hole 204, and the first elastic element 206 is stretched, thereby playing a good buffering role. This prevents the jet pipe 12 from being blocked and the different jet volume causing different reaction forces, which would cause deformation of the barrel body 10, thus ensuring its performance and lifespan. When blowing stops, it can be reset under the action of the first elastic element 206.

[0022] Please see Figure 3 and Figure 4 The barrel structure also includes: A drive mechanism, mounted on the fixed pipe 11, is used to drive the jet pipe 12 to rotate; The drive mechanism includes: The rotating tube 402 is inserted into the end of the fixed tube 11; An annular groove 401 is formed on the side wall of the jet pipe 12; Roller 403 is fixed to the end of rotating tube 402; The power unit, located inside the fixed tube 11, drives the rotating tube 402 to rotate. When the rotating tube 402 rotates, the roller 403 rolls in the annular groove 401 and drives the jet pipe 12 to rotate. The power mechanism drives the rotating tube 402 to rotate, and at the same time, drives the roller 403 to roll in the annular groove 401, thereby driving the jet pipe 12 to rotate. Under the action of centrifugal force, impurities can be prevented from adhering to the jet pipe 12 and causing blockage, thus ensuring the soot blowing effect.

[0023] Please see Figure 3 and Figure 4 The power components include: The first connecting plate 501 is fixed to the inner wall of the fixing tube 11; Fan 503 rotates on the side wall of first connecting plate 501 via first rotating shaft 502; The transmission mechanism is located between the first rotating shaft 502 and the rotating tube 402. When the fan 503 drives the first rotating shaft 502 to rotate, the transmission mechanism can drive the rotating tube 402 to rotate. When the high-pressure gas enters the fixed tube 11, it can impact the surface of the fan 503, causing it to rotate. At the same time, the first rotating shaft 502 rotates, and the transmission mechanism drives the rotating tube 402 to rotate. The impact force of the high-pressure gas can be used as power, which is more convenient and faster.

[0024] Please see Figure 4 The transmission mechanism includes: The first driving bevel gear 601 is fixed to the end of the first rotating shaft 502; L-shaped plate 602 is fixed to the top of the first connecting plate 501; The second rotating shaft 603 rotates at the top of the L-shaped plate 602; The first driven bevel gear 608 is fixed to the lower end of the second rotating shaft 603 and meshes with the first driving bevel gear 601; The second driving bevel gear 604 is fixed to the upper end of the second rotating shaft 603; The second connecting plate 605 is fixed to the inner wall of the fixing pipe 11; The second driven bevel gear 607 rotates on the side wall of the second connecting plate 605 via the third rotating shaft 606 and is meshed with the second driving bevel gear 604; The connecting component is disposed between the third rotating shaft 606 and the rotating tube 402. When the first rotating shaft 502 rotates, it can drive the first driving bevel gear 601 to rotate. When the first driving bevel gear 601 rotates, it drives the first driven bevel gear 608 to rotate, and drives the second driving bevel gear 604 to rotate through the second rotating shaft 603. When the second driving bevel gear 604 rotates, it drives the second driven bevel gear 607 and the third rotating shaft 606 to rotate, and drives the rotating tube 402 and the roller 403 to rotate through the connecting mechanism, thereby increasing the speed of the rotating tube 402.

[0025] Please see Figure 7 The connection components include: Internal spline 702 is formed on the inner wall of rotating tube 402; The external spline 701 is set on the side wall of the third rotating shaft 606, so that the external spline 701 can slide in the internal spline 702. When the jet pipe 12 moves, under the action of the annular groove 401, it can drive the roller 403 and the rotating pipe 402 to move. At the same time, the external spline 701 can slide in the internal spline 702 to ensure that the power is always connected.

[0026] Please see Figure 3 , Figure 4 and Figure 6 The barrel structure also includes: A cleaning mechanism, located inside the fixed pipe 11, is used to perform reverse cleaning of the jet pipe 12; Cleanup agencies include: The second moving component is disposed inside the fixed tube 11, and a second moving plate 303 is connected to the second moving component for driving the second moving plate 303 to move. The cleaning ring 301 is fixed to the side wall of the second moving plate 303 by the second connecting rod 302. When the second moving component drives the second moving plate 303 to move, the cleaning ring 301 can clean the jet pipe 12 in reverse. After the blowing is completed, the gun barrel body 10 moves back to its original position. The second moving component can drive the second moving plate 303 to move, and the cleaning ring 301 can slide along the inner wall of the hose 13 and the jet pipe 12 by the second connecting rod 302, thereby cleaning the jet pipe 12 in reverse, avoiding blockage, and ensuring the efficiency and effect of blowing.

[0027] Please see Figure 1 , Figure 4 and Figure 6 The second moving component includes: Two T-shaped guide rods 802 are fixed to the ends of the fixed tube 11; The sliding block 801 is sleeved on the side wall of the T-shaped guide rod 802 and connected to the second moving plate 303; Two second elastic elements 803, which can be springs, are sleeved on the side wall of each T-shaped guide rod 802; Push block 804 is fixed to the side wall of sliding block 801, and push block 804 includes inclined surface 805; The push rod 806 is inserted into the side wall of the fixed tube 11; The retaining ring 809 is fixedly sleeved on the side wall of the push rod 806; The third elastic element 810 is sleeved on the side wall of the push rod 806, and the two ends of the third elastic element 810 are fixed to the retaining ring 809 and the fixing tube 11 respectively. The protective cover 807 is fixed to the inner wall of the flue body 1, and a receiving cavity 808 is provided inside the protective cover 807. When one end of the push rod 806 abuts against the end of the receiving cavity 808, the other end of the push rod 806 can slide on the inclined surface 805, and the support ring 16 can abut against the end of the protective cover 807. After the soot blowing is completed, the gun barrel body 10 moves back to its original position. At the same time, the first connecting rod 14 drives the ring 15 and the support ring 16 to move towards the protective cover 807, so that the fixed tube 11 and the hose 13 can move into the receiving cavity 808. When the push rod 806 abuts against the end of the receiving cavity 808, the other end of the push rod 806 can slide on the inclined surface 805, and the support ring 16 can abut against the end of the protective cover 807. When the end faces of the receiving cavity 808 abut against each other, the receiving cavity 808 can be pushed to move. At the same time, the third elastic element 810 is stretched, so that the end of the push rod 806 can slide along the inclined surface 805, thereby pushing the sliding block 801 and the second moving plate 303 to move. Meanwhile, the second elastic element 803 is compressed and drives the cleaning ring 301 to slide along the inner wall of the hose 13 and the jet pipe 12 through the second connecting rod 302. When the support ring 16 abuts against the end of the protective cover 807, it can seal the receiving cavity 808, which can play a protective role and improve the service life of the jet pipe 12.

[0028] A boiler flue soot blower includes a boiler flue soot blower gun barrel structure.

[0029] Working principle: When it is necessary to blow soot into the flue body 1, the gun barrel body 10 is gradually moved into the flue body 1 and rotated at the same time, so that high-pressure gas enters the gun barrel body 10. Then, it enters the jet pipe 12 through the fixed pipe 11 and the hose 13 and is ejected, thereby realizing the soot blowing operation of the flue body 1.

[0030] When the barrel body 10 moves, the first connecting rod 14 can drive the ring 15 to rotate within the support ring 16, and at the same time, drive the slider 901 to slide along the first guide rod 902. At this time, the suspended end of the barrel body 10 can be supported and limited, which can reduce the bending deformation of the barrel body 10 and ensure its performance and service life.

[0031] Meanwhile, when high-pressure gas is ejected through the jet pipe 12, the jet pipe 12 will be subjected to a reaction force, causing the jet pipe 12 to move closer to the fixed pipe 11. At the same time, the hose 13 deforms. When the jet pipe 12 moves, it can drive the first moving plate 202 to move through the connecting ring 205, and drive the sliding plate 203 to slide in the liquid storage tank 201 through the second guide rod 208. At the same time, the damping fluid flows along the through hole 204, and the first elastic element 206 is stretched, which can play a good buffering role. This prevents the jet pipe 12 from being blocked and the different jet volume causing different reaction forces, which would cause deformation of the barrel body 10, thus ensuring its performance and lifespan. Furthermore, when the blowing stops, it can be reset under the action of the first elastic element 206.

[0032] Furthermore, when high-pressure gas enters the fixed pipe 11, it impacts the surface of the fan 503, causing it to rotate. Simultaneously, the first drive bevel gear 601 rotates via the first rotating shaft 502. When the first drive bevel gear 601 rotates, it drives the first driven bevel gear 608 to rotate. The second drive bevel gear 604 rotates via the second rotating shaft 603. When the second drive bevel gear 604 rotates, it drives the second driven bevel gear 607 and the third rotating shaft 606 to rotate. Through the connecting mechanism, the rotating pipe 402 and the roller 403 rotate, thereby driving the jet pipe 12 to rotate. Under the action of centrifugal force, impurities are prevented from adhering to the jet pipe 12 and causing blockage, ensuring its dust blowing effect.

[0033] After the soot blowing is completed, the barrel body 10 is moved back to its original position. At the same time, the first connecting rod 14 drives the ring 15 and the support ring 16 to move closer to the protective cover 807, so that the fixed tube 11 and the hose 13 can move into the receiving cavity 808. When the push rod 806 abuts against the end face of the receiving cavity 808, it can push the receiving cavity 808 to move. At the same time, the third elastic element 810 is stretched, so that the end of the push rod 806 can slide along the inclined surface 805, thereby pushing the sliding block 801 and the second moving plate 303 to move. Meanwhile, the second elastic element 803 is compressed, and through the second connecting rod 302, it drives the cleaning ring 301 to slide along the inner wall of the hose 13 and the jet pipe 12, thereby cleaning the jet pipe 12 in reverse to avoid blockage and ensure the efficiency and effect of soot blowing.

[0034] When the support ring 16 abuts against the end of the protective cover 807, it can seal the receiving cavity 808, providing protection and improving the service life of the jet pipe 12.

[0035] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0036] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A lance structure for a boiler flue sootblower, comprising a lance body (10) which can be inserted into a flue body (1), said lance body (10) being provided with two symmetrical air injection pipes (12), characterised in that: The barrel structure further comprises: An elastic communication mechanism arranged on the side wall of the barrel body (10) and used for elastically communicating the jet pipe (12) and the barrel body (10); The elastic communication mechanism comprises: Two fixed pipes (11) symmetrically arranged and communicated with the side wall of the barrel body (10), and the fixed pipes (11) are communicated with the jet pipe (12) through the hose (13); A supporting assembly arranged between the barrel body (10) and the flue body (1) and used for supporting the barrel body (10); A buffering assembly arranged between the jet pipe (12) and the supporting assembly and capable of buffering when the jet pipe (12) is subjected to the reaction force of high-pressure gas.

2. A lance structure for a boiler flue sootblower according to claim 1, characterized in that: The supporting assembly comprises: A circular ring (15) fixed to the end of the barrel body (10) through a first connecting rod (14); Two first guide rods (902) fixed in the flue body (1); A sliding block (901) sliding on the side wall of the first guide rod (902); A supporting ring (16) rotating on the side wall of the circular ring (15) and fixed with the sliding block (901).

3. A lance structure for a boiler flue sootblower according to claim 2, characterized in that: The buffering assembly comprises: A liquid storage tank (201) fixed to the end of the circular ring (15) through a mounting ring (207), and the liquid storage tank (201) is filled with damping liquid; A sliding plate (203) sliding in the liquid storage tank (201), and a plurality of through holes (204) are arranged on the side wall of the sliding plate (203); A first moving assembly connected between the jet pipe (12) and the sliding plate (203) and used for driving the sliding plate (203) to move in the liquid storage tank (201), so that the damping liquid can flow through the through holes (204) and buffer when the sliding plate (203) moves; The first moving assembly comprises: A first moving plate (202) connected to the side wall of the jet pipe (12) through a connecting ring (205); Two second guide rods (208) connected between the first moving plate (202) and the sliding plate (203), and the second guide rods (208) penetrate the side wall of the liquid storage tank (201); A first elastic member (206) sleeved on the side wall of each second guide rod (208), and the two ends of the first elastic member (206) are respectively fixed with the sliding plate (203) and the liquid storage tank (201).

4. A lance structure for a boiler flue sootblower according to claim 1, characterized in that: The barrel structure further comprises: A driving mechanism arranged on the fixed pipe (11) and used for driving the jet pipe (12) to rotate; The driving mechanism comprises: A rotating pipe (402) inserted into the end of the fixed pipe (11); An annular groove (401) arranged on the side wall of the jet pipe (12); A roller (403) fixed to the end of the rotating pipe (402); A power assembly arranged in the fixed pipe (11) and used for driving the rotating pipe (402) to rotate, so that the roller (403) can roll in the annular groove (401) and drive the jet pipe (12) to rotate when the rotating pipe (402) rotates.

5. A lance structure for a boiler flue sootblower according to claim 4, characterized in that: The power assembly comprises: The first connecting plate (501) is fixed to the inner wall of the fixed pipe (11); The fan (503) is rotatable on the side wall of the first connecting plate (501) through the first rotating shaft (502); The transmission mechanism is arranged between the first rotating shaft (502) and the rotating pipe (402), and when the fan (503) drives the first rotating shaft (502) to rotate, the transmission mechanism can drive the rotating pipe (402) to rotate.

6. A lance structure for a boiler flue sootblower according to claim 5, characterized in that: The transmission mechanism comprises: The first driving bevel gear (601) is fixed to the end of the first rotating shaft (502); The L-shaped plate (602) is fixed to the top of the first connecting plate (501); The second rotating shaft (603) is rotatable on the top of the L-shaped plate (602); The first driven bevel gear (608) is fixed to the lower end of the second rotating shaft (603) and is arranged in meshing with the first driving bevel gear (601); The second driving bevel gear (604) is fixed to the upper end of the second rotating shaft (603); The second connecting plate (605) is fixed to the inner wall of the fixed pipe (11); The second driven bevel gear (607) is rotatable on the side wall of the second connecting plate (605) through the third rotating shaft (606) and is arranged in meshing with the second driving bevel gear (604); The connecting assembly is arranged between the third rotating shaft (606) and the rotating pipe (402).

7. A lance structure for a boiler flue sootblower according to claim 6, characterized in that: The connecting assembly comprises: The inner spline (702) is arranged on the inner wall of the rotating pipe (402); The outer spline (701) is arranged on the side wall of the third rotating shaft (606), so that the outer spline (701) can slide in the inner spline (702).

8. A lance structure for a boiler flue sootblower according to claim 1, characterized in that: The barrel structure further comprises: The cleaning mechanism is arranged in the fixed pipe (11) and is used for reverse cleaning of the air injection pipe (12); The cleaning mechanism comprises: The second moving assembly is arranged in the fixed pipe (11), and a second moving plate (303) is connected to the second moving assembly, and the second moving plate (303) is driven to move; The cleaning ring (301) is fixed to the side wall of the second moving plate (303) through the second connecting rod (302), and when the second moving assembly drives the second moving plate (303) to move, the cleaning ring (301) can clean the air injection pipe (12) in reverse.

9. A lance structure for a boiler flue sootblower according to claim 8, characterized in that: The second moving assembly comprises: Two T-shaped guide rods (802) are fixed to the ends of the fixed pipe (11); The sliding block (801) is sleeved on the side wall of the T-shaped guide rod (802) and is connected with the second moving plate (303); Two second elastic members (803) are sleeved on the side wall of each T-shaped guide rod (802); The pushing block (804) is fixed to the side wall of the sliding block (801), and the pushing block (804) comprises an inclined surface (805); The pushing rod (806) is inserted into the side wall of the fixed pipe (11); The stop ring (809) is fixedly sleeved on the side wall of the pushing rod (806); A third elastic member (810) is sleeved on the side wall of the push rod (806), and two ends of the third elastic member (810) are fixed with the blocking ring (809) and the fixed tube (11) respectively; A protective cover (807) is fixed on the inner wall of the flue body (1), and a receiving cavity (808) is arranged in the protective cover (807); when one end of the push rod (806) abuts against the end of the receiving cavity (808), the other end of the push rod (806) can slide on the inclined surface (805), and the supporting ring (16) can abut against the end of the protective cover (807).

10. A boiler flue sootblower characterised by: A lance structure for a boiler flue sootblower comprising a lance according to any one of claims 1 to 9.

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