CN219234802U

CN219234802U - Device for removing oxide skin and burrs after scar removal outside straight welded pipe

Info

Publication number: CN219234802U
Application number: CN202223303197.5U
Authority: CN
Inventors: 林加荣; 喻兵
Original assignee: Nanjing South Light Medium Light Complete Equipment Manufacturing Co ltd
Current assignee: Nanjing South Light Medium Light Complete Equipment Manufacturing Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-06-23
Anticipated expiration: 2032-12-09

Abstract

The utility model discloses a device for removing oxide skin and burrs after scar removal outside a straight welded pipe, and relates to the field of steel pipe weld treatment equipment. The method can solve the problem that the secondary oxide layer and the filiform iron filings occur on the surface of the welded seam after the burrs outside the welded seam are scraped, and reduce the defect of the outer surface of the steel pipe caused by the oxide layer and the filiform iron filings in the sizing and shaping section. The polishing device comprises a protective cover, a carrier roller, a mounting bracket, a polishing head swinging mechanism, a driving motor and a polishing head, wherein the carrier roller and the mounting bracket are arranged in the protective cover; the front side and the rear side of the protective cover are respectively provided with a steel pipe inlet and a steel pipe outlet, the carrier roller is rotationally connected to the lower part of the mounting bracket, and the polishing head swinging mechanism comprises a swinging bracket, a swinging cylinder and a hinging bracket. The manual polishing machine replaces the former manual polishing, can lighten the labor intensity of workers and brings operational safety; and does not pollute the environment.

Description

Device for removing oxide skin and burrs after scar removal outside straight welded pipe

Technical Field

The utility model relates to the field of steel pipe weld joint treatment equipment.

Background

The production process of the high-frequency straight welded pipe is that the strip steel is gradually formed into a round or square rectangular pipe blank shape according to the pass under the action of a rolling die, the edge of the strip steel is heated to a molten state by a high-frequency induction heating device, and meanwhile, the edges of the strip steel are fused together under the action of the outside extrusion force on the outer surface of the pipe blank, and the edges of the two strip steel are in a liquid state, so that redundant molten steel can be extruded out at a joint after the action of the extrusion force. Some molten steel which is extruded out forms weld beads which are attached to the outer side of the steel pipe wall, and some molten steel which is left in the steel pipe, and the weld beads are commonly called as outer burrs and inner burrs of the steel pipe. The welded steel pipe blank is subjected to sizing and shaping rolling in a subsequent finishing section to reach the standard specified size. The sizing and shaping is mainly performed by acting the die on the outer surface of the steel pipe, driving the die to rotate forward under the driving of the motor, and finally achieving the specified size after sizing and shaping by one pass, so that in order to smoothly perform the next sizing and shaping process, the accumulated scraps on the outer surface of the steel pipe can be removed.

At present, steel pipe manufacturers in the industry often add a fixed outer burr removing device (commonly called an outer scar removing device in the straight welded pipe industry) at the outer burr treatment position of the steel pipe, specifically, a planing tool is placed right above a welded steel pipe welding seam, and the planing tool scrapes off weld burrs on the outer surface of the steel pipe in a red heat state by utilizing the forward force of the steel pipe. The welding seam of the steel pipe for scraping the weld nodule is exposed to the air in a high-temperature state, so that the welding seam is oxidized again, an oxidation layer is formed later, particularly, in the production of thick-wall steel pipes, the oxidation is easier to occur because the production speed is low, in addition, because the planing tool acts on a place where the welding seam is relatively far away from the center, the molten state of steel is poorer than that of the steel in the center of the welding seam because the thermal effect is weakened, filiform scrap iron is often formed under the action of the planing tool, and the oxidation layer is formed again at the welding seam and the filiform scrap iron is adhered to the vicinity of the welding seam and enters a subsequent sizing and shaping station along with the advancing of the steel pipe. The steel pipe is pressed against the playing surface by the force applied by the mould during the sizing and shaping of the back pass. Finally, pits or embossments are formed on the outer surface of the steel pipe, and the quality of the outer surface of the light pipe is affected. With the development of the steel pipe industry, the quality requirements of customers on the outer surface of the steel pipe are higher and higher, and pits and embossments on the outer surface of the steel pipe are not accepted by the users and can only be treated as second grade products, so that the steel pipe is a main factor influencing the steel pipe good yield in the current steel pipe manufacturing industry to a certain extent.

Disclosure of Invention

Aiming at the problems, the utility model provides a device for removing the oxide skin and burrs after the outer scar of the straight welded pipe, which can solve the problem that the reoxidation layer and the filiform scrap iron occur on the surface of the welded pipe after the burrs outside the welded pipe are scraped, reduce the defect of the outer surface of the steel pipe caused by the oxidation layer and the filiform scrap iron in the sizing and shaping section, further improve the production yield of the steel pipe, reduce the production cost and improve the profit of enterprises; can solve the problems of great labor intensity of workers brought by manually polishing by a portable grinder, personal injury caused by scattered flying after the grinding wheel is cracked, environmental pollution caused by scattered flying of dust after polishing and the like in order to remove the oxide skin and the filiform scrap iron before.

The technical scheme of the utility model is as follows: the polishing device comprises a protective cover 6, a carrier roller 5 arranged in the protective cover 6, a mounting bracket 4, a polishing head swinging mechanism connected to the mounting bracket 4, a driving motor 2 connected to the polishing head swinging mechanism and a polishing head 1 connected to the driving motor 2;

the steel pipe import and steel pipe export have been seted up respectively to the front and back both sides of protection casing 6, bearing roller 5 rotates the lower part of connecting at installing support 4, the first swing mechanism of polishing includes swing support 31, swing cylinder 32 and hinge support 34, hinge support 34 detachable connects on the upper portion of installing support 4, the middle part of swing support 31 articulates on hinge support 34, driving motor 2 fixed connection is in the front portion of swing support 31, the center fixed connection of polishing head 1 is on driving motor 2's output shaft, swing cylinder 32 then connects between the rear portion of swing support 31 and hinge support 34.

Further, one end of the swing cylinder 32 is hinged to the rear portion of the swing bracket 31, and the other end is hinged to the hinge bracket 34.

Further, a spring 33 is provided between the front of the swing bracket 31 and the hinge bracket 34.

Further, the mounting bracket 4 is vertically arranged, the hinge bracket 34 is horizontally arranged, an auxiliary stay bar 35 is fixedly connected to the hinge bracket 34, the auxiliary stay bar 35 is obliquely arranged, and the bottom end of the auxiliary stay bar 35 abuts against the mounting bracket 4.

Further, the top of protection casing 6 has seted up out the dirt mouth go out dirt department and be equipped with dust recovery unit 7, dust recovery unit 7 includes out dirt pipe, air exhauster and collects the frame, the air exhauster is connected in a dirt mouth department, go out dirt union coupling between air exhauster and collection frame.

According to the utility model, the welding seam is polished by adopting the electric and pneumatic actions, and the scale and filiform iron filings at the welding seam are removed, so that the manual polishing in the past is replaced, the labor intensity of workers can be reduced, and the operation safety is brought; and because the structure adopts closed protection casing and dust recovery unit to make the process of polishing be unlikely to cause the pollution to the environment, solve the dust mess that manual work was polished in the past and fly away phenomenon more environmental protection.

Drawings

Figure 1 is a schematic view of the structure of the present case,

FIG. 2 is a side view of the present case;

in the figure, 1 is a polishing head, 2 is a driving motor, 31 is a swinging bracket, 32 is a swinging cylinder, 33 is a spring, 34 is a hinge bracket, 4 is a mounting bracket, 5 is a carrier roller, 6 is a protective cover, 7 is a dust recovery device, and 8 is a steel pipe.

Description of the embodiments

In order to clearly illustrate the technical features of the present patent, the following detailed description will make reference to the accompanying drawings.

The device is an independent device and is arranged behind the outer burrs and before the sizing and shaping section. The device mainly comprises a polishing head 1, a driving motor 2 of the polishing head, a polishing head swinging device 3, a mounting bracket 4, a carrier roller 5, a protective cover 6, a dust recovery device 7 and the like.

The mounting bracket 4 is used for mounting the polishing head 1, the driving motor 2, the swinging bracket 31 and the carrier roller 5; the carrier roller 5 can support the steel tube 8 and is used as a lower fulcrum of the steel tube 8 during polishing; the swinging bracket 31 is provided with a polishing head 1 and a driving motor 2, the polishing head 1 is a gauze belt wheel, and the surface of a weld joint is polished by rotating under the action of the driving motor 2; when the steel pipe 8 to be polished reaches the lower part of the polishing head 1, the swing cylinder 32 acts to drive the swing bracket 31 to attach the polishing head 1 to the upper surface of the steel pipe 8.

The gauze belt wheel for polishing is rotated under the action of the driving motor 2 to polish the surface of the welding seam, and the steel pipe 8 walks forwards, so that the whole length of the welding seam is polished by the polishing head 1.

The other end of the swinging bracket 31 is connected with a swinging cylinder 32, the swinging of the swinging bracket 31 can be realized by the action of the swinging cylinder 32, the swinging bracket 31 swings around a hinged support 34, the hinged support 34 is detachably connected with the mounting bracket 4, the height adjustment is realized, the production of steel pipes with different pipe diameters is met, meanwhile, the polishing head is ensured to be always pressed on the welding seam surface of the steel pipe to ensure certain pressure, the polishing head can be tightly attached to the steel pipe surface by adjusting the air pressure, the oxide skin and filiform iron filings on the welding seam surface are polished, and the base metal of the steel pipe is not polished.

The spring 33 can play a role in buffering when the swing cylinder 32 is pressed down, so that trace is prevented from being knocked out on the surface of the steel pipe when the swing cylinder 32 swings too fast.

The outer face of the polishing device is covered with a dust cover 6 to prevent dust from splashing and causing environmental pollution. The dust cover 6 is provided with a dust recovery device 7 with an internal exhaust fan, so that dust in the dust cover 6 can be recovered, and the dust enters the collecting frame through a fixed air duct.

While there have been described what are believed to be the preferred embodiments of the present utility model, it will be apparent to those skilled in the art that many more modifications are possible without departing from the principles of the utility model.

Claims

1. The device for removing the oxide skin and burrs after the straight welded pipe is subjected to scar removal is characterized by comprising a protective cover (6), a carrier roller (5) arranged in the protective cover (6), a mounting bracket (4), a polishing head swinging mechanism connected to the mounting bracket (4), a driving motor (2) connected to the polishing head swinging mechanism and a polishing head (1) connected to the driving motor (2);

the utility model discloses a polishing head swing mechanism, including protection casing (6), bearing roller (5), bearing roller (6) are offered respectively to both sides around, bearing roller (5) rotate the lower part of being connected at installing support (4), the head swing mechanism of polishing includes swing support (31), swing cylinder (32) and hinge support (34), the detachable upper portion of connection at installing support (4) of hinge support (34), the middle part of swing support (31) articulates on hinge support (34), driving motor (2) fixed connection is in the front portion of swing support (31), the center fixed connection of head of polishing (1) is on the output shaft of driving motor (2), swing cylinder (32) then connect between the rear portion of swing support (31) and hinge support (34).

2. The device for removing the scale and the burrs outside the straight welded pipe according to claim 1, wherein one end of the swinging cylinder (32) is hinged with the rear part of the swinging bracket (31), and the other end is hinged with the hinge bracket (34).

3. The device for removing the scale and burr after the scar outside the straight welded pipe according to claim 1, wherein a spring (33) is further arranged between the front part of the swing bracket (31) and the hinge bracket (34).

4. The device for removing the scale and the burrs outside the straight welded pipe according to claim 1, wherein the mounting bracket (4) is vertically arranged, the hinge bracket (34) is horizontally arranged, an auxiliary stay bar (35) is fixedly connected to the hinge bracket (34), the auxiliary stay bar (35) is obliquely arranged, and the bottom end of the auxiliary stay bar is propped against the mounting bracket (4).

5. The device for removing oxide skin and burrs after scarification outside a straight welded pipe according to claim 1, wherein a dust outlet is formed in the top of the protective cover (6), a dust recycling device (7) is arranged at the dust outlet, the dust recycling device (7) comprises a dust outlet pipe, an exhaust fan and a collecting frame, the exhaust fan is connected at the dust outlet, and the dust outlet pipe is connected between the exhaust fan and the collecting frame.