Gantry type automatic soot blower for inner wall of steel pipe

Abstract

The invention relates to the field of petroleum steel pipe manufacturing dust removal, in particular to a gantry type automatic steel pipe inner wall soot blowing device which comprises a gantry beam, stand columns are fixedly installed at the two ends of the lower surface of the gantry beam, a guide rail is fixedly installed on the gantry beam, and a sliding block is slidably connected to the guide rail; a variable-frequency electric moving trolley is fixedly installed on the sliding block, the lower surface of the gantry beam is in threaded connection with an internal thread cylindrical pin, a rack is fixedly installed on the lower surface of the gantry beam through the internal thread cylindrical pin, and an engineering drag chain connecting support is fixedly installed on the gantry beam. The steel pipe dust blowing device has the beneficial effects that after a to-be-treated steel pipe reaches a dust blowing station, the device can be automatically aligned according to the size and position of the steel pipe, then air blowing and dust blowing operation can be conducted in the pipeline after fine adjustment, the dust blowing efficiency is greatly improved, and the dust blowing device is convenient to use and high in practicability. And the overall operation is relatively simple, convenient and efficient.

Description

Technical Field

[0001] The invention relates to the technical field of dust removal in petroleum steel pipe manufacturing, in particular to a gantry type automatic steel pipe inner wall soot blowing device. Background Art

[0002] In the production of petroleum steel pipes, scale and dust are generally retained on the inner surface of the steel pipes. The scale and dust in the steel pipes are not easy to remove during the normal operation of the steel pipes. If they are not discharged in time, it will affect the subsequent processes. The existing production process is to use the negative pressure generated by the centrifugal fan at one end of the steel pipe to suck away the scale and dust retained in the steel pipe. Since the negative pressure generated by the centrifugal fan is limited, the scale and dust with strong adhesion are difficult to be sucked away. Therefore, in the production of dust removal on the inner wall of the steel pipe, a device that can quickly and effectively remove the scale and dust in the steel pipe is needed to improve the efficiency of discharging scale and dust in the steel pipe. For this purpose, it is necessary to propose a gantry-type automatic steel pipe inner wall soot blowing device. Summary of the invention

[0003] In view of the problems in the prior art, the present invention provides a gantry type automatic steel pipe inner wall soot blowing device.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a gantry type automatic steel pipe inner wall sootblowing device comprises a gantry beam, both ends of the lower surface of the gantry beam are fixedly installed with columns, a guide rail is fixedly installed on the gantry beam, a sliding block is slidably connected to the guide rail, a variable frequency electric mobile trolley is fixedly installed on the sliding block, an internal threaded cylindrical pin is threadedly connected to the lower surface of the gantry beam, and a rack is fixedly installed on the lower surface of the gantry beam through the internal threaded cylindrical pin, an engineering drag chain connecting bracket is fixedly installed on the gantry beam, an engineering drag chain roller is fixedly installed on the upper surface of the gantry beam, an engineering drag chain roller is provided with an engineering drag chain, and one end of the engineering drag chain is fixedly connected to the engineering drag chain bracket. On the chain connecting bracket, a silencer sootblower head pneumatic lifting assembly is fixedly installed on the outer wall of the sliding block, a manual lifting adjustment assembly is fixedly installed on the outer wall of the silencer sootblower head pneumatic lifting assembly, a silencer sootblower head is fixedly installed on the lower end of the manual lifting adjustment assembly, an anti-collision buffer assembly is sleeved on the outer wall of the silencer sootblower head, a compressed air pipeline is fixedly installed on the upper surface of the gantry beam, the compressed air pipeline is connected with the silencer sootblower head, a pipe end detector is fixedly installed on the outer wall of the variable frequency electric mobile trolley, a limit position detection switch is fixedly installed on the gantry beam, a limit position block is fixedly installed on the gantry beam, and a laser rangefinder is fixedly installed on the column.

[0005] Specifically, the silencer soot blowing head pneumatic lifting assembly includes a lifting cylinder fixing ear seat, a fixing frame is fixedly installed on the lifting cylinder fixing ear seat, a lifting cylinder is fixedly installed on the lifting cylinder fixing ear seat, and the lifting cylinder is installed in the fixing frame, a linear guide rail is fixedly installed on the outer wall of the fixing frame, the output end of the lifting cylinder is fixedly connected to the cylinder piston rod joint, the cylinder piston rod joint is fixedly installed on the connecting base, the upper surface of the connecting base is fixedly installed with a sliding frame, the upper end of the sliding frame is fixedly installed with a linear guide slider, the linear guide slider is slidably connected to the linear guide rail, a guide seat is fixedly installed on the outer wall of the fixed frame, a guide rod is slidably connected to the guide seat, a first buffer spring is sleeved on the guide rod, the lower end of the first buffer spring is against the guide seat, and the lower end of the guide rod is fixedly installed on the upper surface of the connecting base.

[0006] Specifically, the manual lifting and adjusting assembly includes a screw fixing seat, which is fixedly mounted on a sliding frame, a thrust ball bearing is fixedly mounted on the screw fixing seat, the screw fixing seat is rotatably connected to a screw via the thrust ball bearing, a sliding seat is fixedly mounted on the rod wall of the screw, and a hand wheel is fixedly mounted on the upper end of the screw.

[0007] Specifically, the anti-collision buffer assembly includes a guide rod, which is fixedly mounted on the outer wall of the sliding seat, and a buffer baffle is slidably connected to the guide rod. A second buffer spring is sleeved on the guide rod, and the two ends of the second buffer spring are respectively against the buffer baffle and the sliding seat. One end of the guide rod passes through the buffer baffle and extends outward and is provided with a thread, and the threaded end of the guide rod is threadedly connected to a locking nut.

[0008] Specifically, the compressed air pipeline includes an air blowing on-off valve, a hexagonal external thread head, a long compressed air hose and a short compressed air hose. The air blowing on-off valve is fixedly installed on the engineering drag chain connecting bracket, the long compressed air hose is fixedly installed on the upper surface of the gantry beam, and the short compressed air hose is fixedly installed on the sliding seat. One end of the long compressed air hose and the short compressed air hose are connected to the air blowing on-off valve through the hexagonal external thread head, and the other end of the short compressed air hose is connected to the silencer soot blowing head.

[0009] Specifically, the silencer sootblower head comprises a silencer bell mouth and a silencer sponge. The silencer bell mouth is fixedly mounted on a short compressed air rubber hose, and the silencer sponge is fixedly sleeved on the inner wall of the silencer bell mouth.

[0010] Specifically, the variable frequency electric mobile vehicle includes a variable frequency motor, which is fixedly mounted on a sliding block. A gear is fixedly mounted on the output end of the variable frequency motor via a coupling, and the gear is meshed with a rack correspondingly.

[0011] Specifically, an anti-collision limit switch is arranged at one end of the guide rod away from the buffer baffle.

[0012] Beneficial effects of the present invention: The gantry-type automatic steel pipe inner wall soot blowing device described in the present invention, when the steel pipe to be processed arrives at the soot blowing station, the pneumatic lifting assembly of the silencer soot blowing head gradually approaches the pipe end of the steel pipe to be processed under the drive of the variable frequency electric mobile trolley, and then the silencer soot blowing head can be automatically moved to the pipe mouth position of the pipeline according to the positioning, and the anti-collision buffer assembly can be used to prevent the silencer soot blowing head from being offside, and then the height of the silencer soot blowing head is fine-tuned to align it with the center of the pipe mouth of the pipeline, and then the air blowing on-off valve is opened to perform air blowing operation, and after the air blowing soot blowing operation is completed, according to the laser rangefinder installed on the column, it can be ensured that the variable frequency electric mobile trolley returns to its original position after the soot blowing operation is completed, so that the equipment can be automatically aligned according to the size and position of the steel pipe, and then after fine-tuning, air blowing and soot blowing operations can be performed in the pipeline, making the overall operation relatively simple, convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 A schematic diagram of the structure of a gantry-type automatic steel pipe inner wall sootblowing device provided by the present invention; Figure 2 A schematic side view of the structure of a gantry-type automatic steel pipe inner wall sootblowing device provided by the present invention; Figure 3 A schematic diagram of the top view of the structure of the gantry type automatic steel pipe inner wall soot blowing device provided by the present invention; Figure 4 A schematic diagram of the installation structure of a pneumatic lifting assembly, a manual lifting adjustment assembly, an anti-collision buffer assembly and a silencer sootblowing head of a gantry-type automatic steel pipe inner wall sootblowing device provided by the present invention; Figure 5 A schematic diagram of the internal structure of a side view of a pneumatic lifting assembly of a silencer sootblower head of a gantry-type automatic steel pipe inner wall sootblower device provided by the present invention; Figure 6 A schematic diagram of the external structure of a side view of a pneumatic lifting assembly of a silencer sootblower head of a gantry-type automatic steel pipe inner wall sootblower device provided by the present invention; Figure 7 A schematic diagram of the external structure of the air blowing on-off valve and the compressed air pipeline of the gantry type automatic steel pipe inner wall soot blowing device provided by the present invention.

[0015] In the figure: 1. Column; 2. Gantry beam; 3. Rack; 4. Internal thread cylindrical pin; 5. Guide rail; 6. Engineering drag chain; 7. Engineering drag chain roller; 8. Blowing on-off valve; 9. Compressed air pipeline; 91. Hexagonal external thread head; 92. Compressed air long hose; 93. Compressed air short hose; 10. Sliding block; 11. Frequency conversion electric mobile trolley; 12. Engineering drag chain connecting bracket; 13. Silencer soot blowing head pneumatic lifting assembly; 131. Lifting cylinder; 132. Lifting cylinder fixing ear seat; 133. Linear guide; 134. First buffer spring; 135. Linear guide slider; 136. Fixed frame; 137. Guide rod; 138. Guide seat; 1 39. Cylinder piston rod joint; 1310. Connecting base; 1311. Sliding frame; 14. Manual lifting and adjusting assembly; 141. Hand wheel; 142. Screw; 143. Screw fixing seat; 144. Thrust ball bearing; 145. Sliding seat; 15. Frequency conversion motor; 16. Gear; 17. Limit stopper; 18. Limit detection switch; 19. Laser rangefinder; 20. Anti-collision buffer assembly; 201. Second buffer spring; 202. Buffer baffle; 203. Guide rod; 204. Locking nut; 205. Anti-collision limit switch; 21. Silenced soot blowing head; 211. Silenced bell mouth; 212. Silenced sponge; 22. Pipe end detector. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0017] like Figure 1-Figure 7As shown, the gantry type automatic steel pipe inner wall sootblowing device described in the present invention comprises a gantry beam 2, both ends of the lower surface of the gantry beam 2 are fixedly installed with columns 1, a guide rail 5 is fixedly installed on the gantry beam 2, a sliding block 10 is slidably connected to the guide rail 5, a variable frequency electric mobile trolley 11 is fixedly installed on the sliding block 10, an internal threaded cylindrical pin 4 is threadedly connected to the lower surface of the gantry beam 2, and a rack 3 is fixedly installed on the lower surface of the gantry beam 2 through the internal threaded cylindrical pin 4, an engineering drag chain connecting bracket 12 is fixedly installed on the gantry beam 2, an engineering drag chain roller 7 is fixedly installed on the upper surface of the gantry beam 2, an engineering drag chain roller 7 is provided with an engineering drag chain 6, one end of the engineering drag chain 6 is fixedly connected to the engineering drag chain connecting bracket 12, and the sliding A silencer sootblower head pneumatic lifting assembly 13 is fixedly installed on the outer wall of the block 10, a manual lifting adjustment assembly 14 is fixedly installed on the outer wall of the silencer sootblower head pneumatic lifting assembly 13, a silencer sootblower head 21 is fixedly installed on the lower end of the manual lifting adjustment assembly 14, an anti-collision buffer assembly 20 is sleeved on the outer wall of the silencer sootblower head 21, a compressed air pipeline 9 is fixedly installed on the upper surface of the gantry beam 2, the compressed air pipeline 9 is connected to the silencer sootblower head 21, a pipe end detector 22 is fixedly installed on the outer wall of the variable frequency electric mobile trolley 11, a limit position detection switch 18 is fixedly installed on the gantry beam 2, a limit position block 17 is fixedly installed on the gantry beam 2, and a laser rangefinder 19 is fixedly installed on the column 1.

[0018] The silencer sootblower head pneumatic lifting assembly 13 includes a lifting cylinder fixed ear seat 132, a fixing frame 136 is fixedly installed on the lifting cylinder fixed ear seat 132, a lifting cylinder 131 is fixedly installed on the lifting cylinder fixed ear seat 132, and the lifting cylinder 131 is installed in the fixing frame 136, a linear guide 133 is fixedly installed on the outer wall of the fixing frame 136, an output end of the lifting cylinder 131 is fixedly connected to a cylinder piston rod joint 139, a connecting base 1310 is fixedly installed on the cylinder piston rod joint 139, a sliding frame 1311 is fixedly installed on the upper surface of the connecting base 1310, a linear guide slider 135 is fixedly installed on the upper end of the sliding frame 1311, and the linear guide slider 135 is slidably connected to the linear guide 133, a guide seat 138 is fixedly installed on the outer wall of the fixing frame 136, and the guide seat 13 8 is slidably connected with a guide rod 137, and a first buffer spring 134 is sleeved on the guide rod 137. The lower end of the first buffer spring 134 is against the guide seat 138, and the lower end of the guide rod 137 is fixedly installed on the upper surface of the connecting base 1310. The lifting cylinder 131 is started, and the lifting cylinder 131 will drive the connecting base 1310 to descend, and the connecting base 1310 will drive the guide rod 137 and the linear guide slider 135 to descend synchronously, and the guide rod 137 is vertically lifted and lowered under the limit of the guide seat 138, and the linear guide slider 135 is vertically lifted and lowered under the limit of the linear guide 133, so that the connecting base 1310 drives the sliding frame 1311 to descend synchronously, and the sliding frame 1311 drives the sliding seat 145 to descend, so that the sliding seat 145 drives the silencer soot blowing head 21 to descend to align with the port of the steel pipe to be treated.

[0019] Among them, the manual lifting and adjustment component 14 includes a screw fixing seat 143, the screw fixing seat 143 is fixedly installed on the sliding frame 1311, and a thrust ball bearing 144 is fixedly installed on the screw fixing seat 143. The screw fixing seat 143 is rotatably connected to the screw 142 through the thrust ball bearing 144. A sliding seat 145 is fixedly installed on the rod wall of the screw 142. A hand wheel 141 is fixedly installed on the upper end of the screw 142. The screw 142 is rotated by the hand wheel 141, and the screw 142 can drive the sliding seat 145 to rise and fall by lifting and lowering the thread of the screw fixing seat 143, and then the height of the silencer soot blowing head 21 can be adjusted to a certain extent, so that the silencer soot blowing head 21 is aligned with the center position of the port of the steel pipe to be treated.

[0020] The anti-collision buffer assembly 20 includes a guide rod 203, which is fixedly mounted on the outer wall of the sliding seat 145, and a buffer baffle 202 is slidably connected to the guide rod 203. A second buffer spring 201 is sleeved on the guide rod 203, and the two ends of the second buffer spring 201 are respectively against the buffer baffle 202 and the sliding seat 145. One end of the guide rod 203 passes through the buffer baffle 202 and extends outward and is provided with a thread. One end of the guide rod 203 provided with a thread is threadedly connected to a locking nut 204, and an anti-collision limit is provided at one end of the guide rod 203 away from the buffer baffle 202. Switch 205, and when the variable frequency electric mobile trolley 11 drives the mobile silencer soot blowing head 21 to move to the same level as the port position of the steel pipe to be processed, the front buffer baffle 202 will contact the end of the steel pipe to be processed. At this time, the guide rod 203 is compressed and moves backward. When the anti-collision limit switch 205 detects a signal, it will send a signal to the control system, believing that the variable frequency electric mobile trolley 11 has driven the mobile silencer soot blowing head 21 to hit the steel pipe. The control system then sends a signal to stop the variable frequency electric mobile trolley 11 from moving, so that the position of the silencer soot blowing head 21 is flush with the port position of the steel pipe to be processed.

[0021] Among them, the compressed air pipeline 9 includes an air blowing on-off valve 8, a hexagonal external thread head 91, a compressed air long rubber hose 92 and a compressed air short rubber hose 93. The air blowing on-off valve 8 is fixedly installed on the engineering drag chain connecting bracket 12, the compressed air long rubber hose 92 is fixedly installed on the upper surface of the gantry beam 2, and the compressed air short rubber hose 93 is fixedly installed on the sliding seat 145. One end of the compressed air long rubber hose 92 and the compressed air short rubber hose 93 are connected to the air blowing on-off valve 8 through the hexagonal external thread head 91, and the other end of the compressed air short rubber hose 93 is connected to the silencer soot blowing head 21. The air blowing on-off valve 8 is opened, and the gas passes through the compressed air long rubber hose 92, the air blowing on-off valve 8 and the compressed air short rubber hose 93 in turn and enters the silencer soot blowing head 21. The silencer soot blowing head 21 blows air into the steel pipe to be treated, thereby blowing out the oxide scale and dust in the steel pipe to be treated.

[0022] The muffler sootblower head 21 includes a muffler bell mouth 211 and a muffler sponge 212 . The muffler bell mouth 211 is fixedly mounted on the compressed air short rubber hose 93 , and the muffler sponge 212 is fixedly sleeved on the inner wall of the muffler bell mouth 211 .

[0023] Among them, the variable frequency electric mobile trolley 11 includes a variable frequency motor 15, which is fixedly installed on the sliding block 10. The output end of the variable frequency motor 15 is fixedly installed with a gear 16 through a coupling. The gear 16 is correspondingly meshed with the rack 3. The variable frequency motor 15 is started, and the variable frequency motor 15 is installed on the sliding block 10, so that when the variable frequency motor 15 drives the gear 16 to rotate, the gear 16 will roll on the surface of the rack 3, and the gear 16 will drive the variable frequency motor 15 to move, and the variable frequency motor 15 drives the sliding block 10 and the variable frequency electric mobile trolley 11 to move, and the variable frequency electric mobile trolley 11 will move parallel to the track of the guide rail 5 under the limit of the guide rail 5.

[0024] When in use, when the steel pipe to be processed arrives at the sootblowing station, the pipe end detector 22 on the variable frequency electric mobile trolley 11 will detect the port position of the steel pipe to be processed, and the variable frequency motor 15 will be started after the port position of the steel pipe to be processed is confirmed. The variable frequency motor 15 is installed on the sliding block 10, so that the variable frequency motor 15 will drive the gear 16 to rotate, and the gear 16 will roll on the surface of the rack 3, and the gear 16 will drive the variable frequency motor 15 to move, and the variable frequency motor 15 will drive the sliding block 10 and the variable frequency electric mobile trolley 11 to move, and the variable frequency electric mobile trolley 11 will move parallel to the track of the guide rail 5 under the limit of the guide rail 5, and when the variable frequency electric mobile trolley The trolley 11 drives the mobile silencer sootblower 21 to move to the same level as the port of the steel pipe to be processed, and the front buffer baffle 202 contacts the end of the steel pipe to be processed. At this time, the guide rod 203 is compressed and moves backward. When the anti-collision limit switch 205 detects a signal, it sends a signal to the control system, believing that the variable frequency electric mobile trolley 11 drives the mobile silencer sootblower 21 to hit the steel pipe. The control system sends a signal to stop the variable frequency electric mobile trolley 11 from moving, so that the position of the silencer sootblower 21 is flush with the port of the steel pipe to be processed. At this time, the lifting cylinder 131 can be started, and the lifting cylinder 131 will drive the connecting base 1310 to descend, and the connecting base 1310 will be connected to the connecting base 1310. The base 1310 will drive the guide rod 137 and the linear guide slider 135 to descend synchronously, and the guide rod 137 will rise and fall vertically under the limit of the guide seat 138, and the linear guide slider 135 will rise and fall vertically under the limit of the linear guide 133, so that the connecting base 1310 drives the sliding frame 1311 to descend synchronously, and the sliding frame 1311 drives the sliding seat 145 to descend, so that the sliding seat 145 drives the silencer soot blowing head 21 to descend to align with the port of the steel pipe to be processed, and then the screw 142 is rotated by the hand wheel 141, and the screw 142 can drive the sliding seat 145 to rise and fall by the threaded lifting of the screw fixing seat 143, so that the silencer soot blowing head 21 can be The height of the ash head 21 is adjusted to a certain extent, so that the silent ash blowing head 21 is aligned with the center position of the port of the steel pipe to be treated. At this time, the air blowing on-off valve 8 is opened, and the gas enters the silent ash blowing head 21 after passing through the compressed air long hose 92, the air blowing on-off valve 8 and the compressed air short hose 93 in turn, and the silent ash blowing head 21 blows air into the steel pipe to be treated, thereby blowing out the oxide scale and dust in the steel pipe to be treated. After the blowing operation is completed, the variable frequency electric mobile trolley 11, the silent ash blowing head pneumatic lifting component 13, the manual lifting adjustment component 14 and the silent ash blowing head 21 can be reset, so as to facilitate the subsequent blowing operation on the steel pipe to be treated.

[0025] The above shows and describes 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 above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A gantry type automatic steel pipe inner wall soot blowing device, comprising a gantry beam (2), characterized in that: Both ends of the lower surface of the gantry beam (2) are fixedly mounted with columns (1); a guide rail (5) is fixedly mounted on the gantry beam (2); a sliding block (10) is slidably connected to the guide rail (5); a variable frequency electric mobile trolley (11) is fixedly mounted on the sliding block (10); an internal thread cylindrical pin (4) is threadedly connected to the lower surface of the gantry beam (2); a rack (3) is fixedly mounted on the lower surface of the gantry beam (2) via the internal thread cylindrical pin (4); an engineering drag chain connecting bracket (12) is fixedly mounted on the gantry beam (2); an engineering drag chain roller (7) is fixedly mounted on the upper surface of the gantry beam (2); an engineering drag chain roller (7) is provided on the engineering drag chain roller (7); one end of the engineering drag chain (6) is fixedly connected to the engineering drag chain connecting bracket (12); and a gear (11) is fixedly mounted on the outer wall of the sliding block (10). A silencer sootblower head pneumatic lifting assembly (13) is installed, a manual lifting adjustment assembly (14) is fixedly installed on the outer side wall of the silencer sootblower head pneumatic lifting assembly (13), a silencer sootblower head (21) is fixedly installed on the lower end of the manual lifting adjustment assembly (14), an anti-collision buffer assembly (20) is sleeved on the outer side wall of the silencer sootblower head (21), a compressed air pipeline (9) is fixedly installed on the upper surface of the gantry beam (2), the compressed air pipeline (9) is connected to the silencer sootblower head (21), a pipe end detector (22) is fixedly installed on the outer side wall of the variable frequency electric mobile trolley (11), a limit position detection switch (18) is fixedly installed on the gantry beam (2), a limit position stopper (17) is fixedly installed on the gantry beam (2), and a laser rangefinder (19) is fixedly installed on the column (1); The muffler sootblower head pneumatic lifting assembly (13) comprises a lifting cylinder fixed ear seat (132), a fixing frame (136) is fixedly mounted on the lifting cylinder fixed ear seat (132), a lifting cylinder (131) is fixedly mounted on the lifting cylinder fixed ear seat (132), and the lifting cylinder (131) is mounted in the fixing frame (136), a linear guide rail (133) is fixedly mounted on the outer wall of the fixing frame (136), an output end of the lifting cylinder (131) is fixedly connected to a cylinder piston rod joint (139), a connecting base (1310) is fixedly mounted on the cylinder piston rod joint (139), a sliding frame (1311) is fixedly mounted on the upper surface of the connecting base (1310), a linear guide rail slider (135) is fixedly mounted on the upper end of the sliding frame (1311), and the linear guide rail slider (135) is slidably connected to the linear guide rail (133); The manual lifting and adjusting assembly (14) comprises a screw fixing seat (143), the screw fixing seat (143) being fixedly mounted on the sliding frame (1311), a thrust ball bearing (144) being fixedly mounted on the screw fixing seat (143), the screw fixing seat (143) being rotatably connected to a screw (142) via the thrust ball bearing (144), and a sliding seat (145) being fixedly mounted on the rod wall of the screw (142); The anti-collision buffer assembly (20) comprises a guide rod (203), the guide rod (203) being fixedly mounted on the outer side wall of the sliding seat (145), a buffer baffle (202) being slidably connected to the guide rod (203), a second buffer spring (201) being sleeved on the guide rod (203), and two ends of the second buffer spring (201) respectively abutting against the buffer baffle (202) and the sliding seat (145).

2. The gantry type automatic steel pipe inner wall soot blowing device according to claim 1 is characterized in that: A guide seat (138) is fixedly mounted on the outer wall of the fixed frame (136); a guide rod (137) is slidably connected to the guide seat (138); a first buffer spring (134) is sleeved on the guide rod (137); the lower end of the first buffer spring (134) abuts against the guide seat (138); and the lower end of the guide rod (137) is fixedly mounted on the upper surface of the connecting base (1310).

3. The gantry type automatic steel pipe inner wall soot blowing device according to claim 1 is characterized in that: A hand wheel (141) is fixedly mounted on the upper end of the screw rod (142).

4. The gantry type automatic steel pipe inner wall sootblowing device according to claim 1 is characterized in that: One end of the guide rod (203) passes through the buffer baffle (202) and extends outward and is provided with a thread, and the end of the guide rod (203) provided with the thread is threadedly connected to a locking nut (204).

5. The gantry type automatic steel pipe inner wall sootblowing device according to claim 1 is characterized in that: The compressed air pipeline (9) comprises an air blowing on-off valve (8), a hexagonal external thread head (91), a long compressed air hose (92) and a short compressed air hose (93); the air blowing on-off valve (8) is fixedly mounted on the engineering drag chain connection bracket (12); the long compressed air hose (92) is fixedly mounted on the upper surface of the gantry beam (2); the short compressed air hose (93) is fixedly mounted on the sliding seat (145); one end of each of the long compressed air hose (92) and the short compressed air hose (93) is connected to the air blowing on-off valve (8) via the hexagonal external thread head (91); and the other end of the short compressed air hose (93) is connected to the silencer soot blowing head (21).

6. The gantry type automatic steel pipe inner wall soot blowing device according to claim 1 is characterized in that: The silencer sootblower head (21) comprises a silencer bell mouth (211) and a silencer sponge (212); the silencer bell mouth (211) is fixedly mounted on a compressed air short rubber hose (93); and the silencer sponge (212) is fixedly sleeved on the inner wall of the silencer bell mouth (211).

7. The gantry type automatic steel pipe inner wall sootblowing device according to claim 1 is characterized in that: The variable frequency electric mobile trolley (11) comprises a variable frequency motor (15), the variable frequency motor (15) is fixedly mounted on the sliding block (10), a gear (16) is fixedly mounted on the output end of the variable frequency motor (15) via a coupling, and the gear (16) is correspondingly meshed with the rack (3).

8. The gantry type automatic steel pipe inner wall sootblowing device according to claim 4 is characterized in that: An anti-collision limit switch (205) is provided at one end of the guide rod (203) away from the buffer baffle (202).

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