Scraping device for welding ribs in steel pipe

Abstract

The utility model relates to the field of steel pipe machining equipment, in particular to a device for scraping welding ribs in a steel pipe. The cutter body is formed by sequentially connecting a first guide pipe, a second guide pipe and a cutter head rod, a water inlet pipe and an oil inlet pipe are arranged on the first guide pipe, an air inlet pipe is arranged on the second guide pipe, the top surface of the cutter head rod is connected with the cutter head, a cutter supporting frame is arranged at the bottom of the cutter head rod, and the cutter body and the cutter head both extend into a pipe blank. A blade of the tool bit is aligned with a steel pipe inner wall welding rib position. The high-frequency welding knife has the advantages that molten iron generated by high-frequency welding is blown away through the air inlet pipe arranged on the knife body, and accumulation of the molten iron in a steel pipe is prevented; the blown-away high-temperature molten iron is cooled through the water inlet pipe and is prevented from being attached to the inner wall of the steel pipe, and the phenomenon of attachments on the inner wall of the steel pipe is reduced.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe processing equipment, and in particular to a device for scraping off weld beads inside steel pipes. Background Technology

[0002] In the production process of steel pipes, steel plates or coiled steel strips need to be unrolled, their surfaces are rolled to form a pipe blank, and longitudinal seams are formed on the pipe blank. These seams are then welded together using high-frequency welding equipment to produce a steel pipe. However, the weld beads produced by welding on the steel pipe protrude from the inner and outer surfaces of the pipe. This not only affects the smoothness of the inner and outer walls of the steel pipe but also its aesthetics, and therefore needs to be removed.

[0003] In the prior art, patent publication number CN 216325616 U discloses an adjustable scraper for removing inner weld beads from steel pipes, including a scraper body and a blade head. The blade head is equipped with a rod, and the scraper body is provided with a slot. The rod is connected to the slot. The scraper body has a first threaded hole inside and passes through the slot. The top of the blade head is equipped with a blade and connected with a first fastening bolt. Shaft seats are symmetrically installed on both sides of the scraper body.

[0004] The technical problem mentioned above is that although the scraper can remove the inner weld beads of the steel pipe, molten iron is generated when the steel billet is subjected to high-frequency welding. This molten iron can easily form lumps inside the steel pipe, affecting the smoothness of the inside of the steel pipe. The inner scraper cannot remove the lumps, so additional lumps need to be removed, thereby reducing the efficiency of cleaning the inner wall of the steel pipe. Utility Model Content

[0005] To solve the above problems, this utility model provides a device for scraping off the weld beads inside steel pipes.

[0006] The technical solution of this utility model is: a scraping device for internal weld beads of steel pipe, including a blade body and a blade head. The blade body is formed by sequentially connecting a first guide tube, a second guide tube, and a blade head rod. The first guide tube is provided with a water inlet pipe and an oil inlet pipe, and the second guide tube is provided with an air inlet pipe. The top surface of the blade head rod is connected to the blade head, and the bottom of the blade head rod is provided with a blade support frame. Both the blade body and the blade head extend into the pipe blank, and the cutting edge of the blade head is aligned with the weld bead position on the inner wall of the steel pipe.

[0007] Furthermore, a fixing block is provided at the tail end of the first conduit. The water inlet pipe and the oil inlet pipe are respectively set inside the first conduit through the fixing block. The height of the fixing block is higher than the height of the tube blank. When the cutter body is placed inside the tube blank, the water inlet pipe and the oil inlet pipe on the fixing block are not affected by the height of the tube blank.

[0008] Furthermore, a magnetic rod is provided between the first conduit and the second conduit. The magnetic rod has a hollow cavity, and a strong magnetic rod is installed in the hollow cavity. The air inlet pipe is arranged on the magnetic rod, and the direction of the air inlet pipe is consistent with that of the second conduit.

[0009] Furthermore, the blade head is detachably connected to the blade head rod and is located at one end of the top surface of the blade head rod, with the cutting edge of the blade head protruding 3-5mm from the top surface of the blade head rod or the blade body.

[0010] Furthermore, the cutter head is pressed into the cutter head groove on the cutter head rod, and a fastening bolt is provided in the cutter head groove for removing the cutter head from the cutter head rod.

[0011] Furthermore, the end of the cutter head inserted into the tube blank is either rounded or chamfered.

[0012] Furthermore, the tool holder supports the tool body via a hydraulic rod.

[0013] The beneficial effects of this utility model are as follows: This utility model designs a device for removing the inner weld bead of a steel pipe, which includes a water inlet pipe, an oil inlet pipe, and an air inlet pipe. After the air inlet pipe set on the cutter body is connected to an air pump, the molten iron generated by high-frequency welding can be dispersed by the gas, preventing the molten iron from accumulating inside the steel pipe. The water inlet pipe set on the cutter body cools the dispersed high-temperature molten iron, preventing the dispersed high-temperature molten iron from adhering to the inner wall of the steel pipe and reducing the phenomenon of deposits on the inner wall of the steel pipe.

[0014] The support frame can be controlled by connecting the hydraulic rod through the oil inlet pipe. When the blade is inserted into the steel pipe, the support frame can be operated by the hydraulic rod to fix the position of the blade. The blade head is made of alloy material, and the blade protrudes 3-5mm from the top surface of the blade head rod or the blade body to meet the needs of removing weld beads inside the steel pipe. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the cutter head structure of a steel pipe internal weld bead scraping device according to this utility model;

[0016] Figure 2 This is a schematic diagram of the support frame structure of a steel pipe internal weld bead scraping device according to this utility model;

[0017] In the picture:

[0018] 1. First conduit 101, fixing block 102, water inlet pipe

[0019] 103. Oil inlet pipe 2. Second guide pipe 3. Cutter head rod

[0020] 301. Inlet pipe end; 302. Tool holder; 4. Magnetic rod.

[0021] 401. Air inlet duct 5. Knife head Detailed Implementation

[0022] A device for scraping weld beads inside steel pipes includes a blade and a blade head 5. The blade is formed by sequentially connecting a first guide tube 1, a second guide tube 2, and a blade head rod 3. A fixing block 101 is provided on the tail end of the first guide tube 1. A water inlet pipe 102 and an oil inlet pipe 103 are respectively set on the fixing block 101. Both the water inlet pipe 102 and the oil inlet pipe 103 are set inside the first guide tube 1 through the fixing block 101. The height of the fixing block 101 is higher than the height of the pipe blank. When the blade is placed inside the pipe blank, the water inlet pipe 102 and the oil inlet pipe 103 on the fixing block 101 are not affected by the height of the pipe blank.

[0023] A magnetic rod 4 is provided between the first conduit 1 and the second conduit 2. The two ends of the magnetic rod 4 are connected to the first conduit 1 and the second conduit 2 by threads. The magnetic rod 4 has a hollow cavity, and a strong magnetic rod is installed in the hollow cavity. The strong magnetic rod is used for induction heating to realize high-frequency welding of the tube blank.

[0024] By setting the air inlet pipe 401 on the magnetic rod 4, the air inlet pipe 401 is set along the direction of the second conduit 2, and the other end of the air inlet pipe 401 is connected to an air pump. The air pump blows away the molten iron in high-frequency welding to prevent the molten iron from accumulating at high temperature, which would make it difficult to remove.

[0025] A water inlet pipe 102 is provided inside the first conduit 1. One end of the water inlet pipe 102 is connected to a water pump, and the other end is located at the high-frequency welding point of the steel pipe. The high-temperature molten iron is cooled by water in time to prevent the molten iron from adhering to the inner wall of the steel pipe under the action of high temperature, and to avoid the formation of molten iron lumps, which are difficult to remove.

[0026] The cutter head 5 is located at one end of the top surface of the cutter head rod 3. The cutter head 5 is a truncated cone shape and made of alloy material. A cutter head groove is provided on the cutter head rod 3. The cutter head 5 is embedded in the cutter head groove by pressing. The cutting edge of the cutter head protrudes 3-5mm from the top surface of the cutter head rod or the cutter body. A fastening bolt is also provided in the cutter head groove. The fastening bolt fixes the position of the cutter head 5 by pressing to prevent the cutter head 5 from shifting. A cutter support frame 302 is provided at the bottom of the cutter head rod 3. A roller is provided at the lower end of the cutter support frame 302. The cutter support frame 302 supports the cutter body through a hydraulic rod.

[0027] In practical use, when welding the tube blank, molten iron from high-frequency welding flows out from the tube seam. To prevent the high-temperature molten iron from adhering to the inner wall of the steel pipe and forming lumps, a device for removing weld beads inside the steel pipe is used. The blade and the blade head 5 are both inserted into the tube blank. The end of the blade head rod 3 inserted into the tube blank is the inlet end 301, which is set to be arc-shaped or chamfered to prevent damage to the inner wall of the steel pipe. The magnetic rod 4 is placed below the welding gun, and the blade of the blade head 5 is aligned with the weld bead position on the inner wall of the steel pipe. The hydraulic rod connected to the oil inlet pipe 103 is opened, so that the support frame 302 pops out from the blade head rod 3, fixing the blade inside the steel pipe. During the tube blank is conveyed by the conveying device, the welding gun welds the tube seam, and the resulting inner weld beads are removed by the blade on the blade head. The end of the blade is lifted by the water inlet pipe 102 and the oil inlet pipe 103 to ensure that the removal of the inner weld beads by the blade head 5 is not hindered even during the tube blank's transmission.

[0028] When the blade of the cutter head 5 has been used for a period of time and the blade is worn, the cutter head 5 can be rotated to shift the original blade position and align the unused blade with the weld bead of the steel pipe to continue the weld bead removal work; when the cutter head 5 needs to be replaced, the fastening bolts can be loosened and the old cutter head 5 can be pried off to replace the new cutter head.

[0029] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A device for removing internal weld reinforcement from a steel pipe, comprising a shank and a head, characterised in that: The blade is composed of a first guide tube, a second guide tube, and a blade rod connected in sequence. The first guide tube is provided with a water inlet pipe and an oil inlet pipe, and the second guide tube is provided with an air inlet pipe. The top surface of the blade rod is connected to the blade head, and the bottom of the blade rod is provided with a blade support frame. Both the blade and the blade head extend into the tube blank, and the cutting edge of the blade head is aligned with the weld bead position on the inner wall of the steel pipe.

2. A device for removing internal weld reinforcement from a steel pipe according to claim 1, characterized in that: A fixing block is provided at the tail end of the first conduit. The water inlet pipe and the oil inlet pipe are respectively set inside the first conduit through the fixing block. The height of the fixing block is higher than the height of the pipe blank.

3. A device for removing internal weld reinforcement from a steel pipe according to claim 1, characterized in that: A magnetic rod is provided between the first conduit and the second conduit. The magnetic rod has a hollow cavity, and a strong magnetic rod is installed in the hollow cavity. The air inlet pipe is arranged on the magnetic rod, and the direction of the air inlet pipe is consistent with that of the second conduit.

4. A device for removing internal weld reinforcement from a steel pipe according to claim 1, characterized in that: The blade is detachably connected to the blade rod and is located at one end of the top surface of the blade rod. The cutting edge of the blade protrudes 3-5mm from the top surface of the blade rod or the blade body.

5. A device for removing internal weld reinforcement from a steel pipe according to claim 4, characterized in that: The cutter head is pressed into the cutter head groove on the cutter head rod, and a fastening bolt is also provided in the cutter head groove.

6. A device for removing internal weld reinforcement from a steel pipe according to claim 1, characterized in that: The end of the cutter head inserted into the tube blank is either rounded or chamfered.

7. A device for removing internal weld reinforcement from a steel pipe according to claim 1, characterized in that: The tool holder supports the tool body via a hydraulic rod inside the tool head rod.

Images