CN212652585U

CN212652585U - Bending device for water wall tube

Info

Publication number: CN212652585U
Application number: CN202021433984.XU
Authority: CN
Inventors: 李凯; 张颖; 方圆
Original assignee: Zhongye Heavy Industry Tangshan Co ltd
Current assignee: Zhongye Heavy Industry Tangshan Co ltd
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2021-03-05
Anticipated expiration: 2030-07-20

Abstract

The utility model relates to the field of steel pipe bending equipment, and discloses a water wall pipe bending device, which comprises a movable rolling shaft and two fixed rolling shafts, wherein the movable rolling shaft is arranged in parallel with the axes of the two fixed rolling shafts, a radial gap is arranged between the two fixed rolling shafts, the projection of the movable rolling shaft on the plane where the axes of the two fixed rolling shafts are positioned is positioned in the radial gap, a plurality of first semicircular grooves are arranged on the movable rolling shaft in the circumference, a plurality of second semicircular grooves are arranged on the two fixed rolling shafts in the circumference, the first semicircular grooves are opposite to the second semicircular grooves one by one, the movable rolling shaft presses a linear pipe fitting which is pre-spanned on the two fixed rolling shafts into a first semicircular groove and forms a bent pipe fitting in a cavity which is respectively surrounded by the second semicircular grooves at two sides by the movable rolling shaft in the process of entering the radial gap under the control, and can achieve the purpose of bending the steel pipe, but also can ensure that the steel pipe is not flattened, improve the quality of finished products and improve the economic benefit.

Description

Bending device for water wall tube

Technical Field

The utility model relates to an equipment field of curved system of steel pipe especially relates to a curved system device of water wall pipe.

Background

In the prior art, a water wall tube, called a water wall for short, is usually laid on the inner wall surface of a hearth, is mainly used for absorbing radiant heat emitted by flame and high-temperature flue gas in a furnace, and has the functions of cooling and protecting the furnace wall. The water wall tube is usually 10# or 20# seamless steel tube with outer diameter of 51-76 mm and wall thickness of 3.5-6.0 mm, and is bent to form the shape fitting the hearth, including light tube water wall tube, membrane water wall tube, etc.

Under the effect of the high-temperature flue gas in the furnace, the water wall tubes are easy to corrode and need to be periodically updated, and meanwhile, along with the rapid development of the steel industry, the market demand for steel making furnaces and water wall tubes also sharply increases. However, the existing method for hot bending the water wall tube is low in efficiency, and the steel tube is easy to damage or deform, so that the yield is reduced; if the bending is performed by using a common roller, the roller is easily crushed and discarded, thereby reducing the efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a curved system device of water wall pipe improves the bending efficiency of sharp pipe fitting, guarantees that the pipe fitting is not flattened, improves the yield of crooked pipe fitting.

The utility model discloses a realize through following technical scheme: a bending device for a water wall pipe comprises a movable rolling shaft and two fixed rolling shafts, wherein the movable rolling shaft is arranged in parallel with the axes of the two fixed rolling shafts, a radial gap is arranged between the two fixed rolling shafts, the projection of the movable roller on the plane of the axes of the two fixed rollers is positioned in the radial gap, a plurality of first semicircular grooves are formed on the movable rolling shaft in the circumferential direction, a plurality of second semicircular grooves are formed on the two fixed rolling shafts in the circumferential direction, the first semicircular grooves are respectively opposite to the second semicircular grooves on the two fixed rollers one by one, and in the process that the movable rolling shafts are controlled to enter the radial gap, the movable rolling shafts press linear pipe fittings pre-stretched on the two fixed rolling shafts into cavities respectively surrounded by the first semicircular grooves and the second semicircular grooves on two sides of the first semicircular grooves to form bent pipe fittings.

The preferable technical scheme is that the number of the first semicircular grooves ranges from 2 to 20, and correspondingly, the number of the second semicircular grooves on each fixed roller is equal to the number of the first semicircular grooves.

Preferably, the fixed rollers are all horizontally disposed, and the moving path of the movable roller is in the vertical direction.

The bending device further comprises a bearing support, and the two fixed rollers are rotatably connected with the bearing support through bearings.

The bending device further comprises a reduction gearbox, an elastic cylindrical pin coupler and a motor, wherein the two fixed rolling shafts are in transmission connection with the reduction gearbox through gears, and the reduction gearbox is in power connection with the motor through the elastic cylindrical pin coupler.

In addition, the preferred technical scheme is that the bending device further comprises a pressing mechanism, the pressing mechanism comprises a hanging bracket, and a vertical screw rod and nut assembly is arranged on the hanging bracket and used for adjusting the pressing displacement of the movable roller.

The beneficial effects are that: compared with the prior art, the utility model rolls the linear pipe fitting into the bent pipe fitting through the rolling fit between the movable rolling shaft provided with the semicircular groove and the two fixed rolling shafts provided with the semicircular grooves and positioned at the two sides, thereby achieving the purpose of bending the steel pipe, ensuring that the steel pipe is not flattened and improving the quality of finished products; secondly, a plurality of round pipes can be bent simultaneously, and the efficiency is improved; in addition, the bending position of the straight pipe fitting can be increased, the angle of the pipe fitting can be set for multiple times, the stability is high, the welding workload between pipe fitting joints is reduced, and the economic benefit is improved.

Drawings

The following detailed description of embodiments of the invention is provided in conjunction with the accompanying drawings, in which:

fig. 1 is a front view of an embodiment of the present invention;

FIG. 2 is a right side view of FIG. 1;

fig. 3 is a schematic view of the embodiment of the present invention, in which a linear pipe to be processed crosses over two second semicircular grooves;

fig. 4 is a schematic diagram of the embodiment of the present invention, in which a straight pipe is pressed into a cavity surrounded by a first semicircular groove and second semicircular grooves on two sides of the first semicircular groove to form a bent pipe;

FIG. 5 is a schematic view of an embodiment of a middle and movable roller according to the present invention;

FIG. 6 is a schematic view of an embodiment of a fixed roller according to the present invention;

FIG. 7 is a schematic view of the embodiment of the present invention, the transmission connection between the reduction box output gear and the fixed roller gear;

wherein the reference numerals are:

the device comprises a movable roller 10, a first semicircular groove 1001, a fixed roller 20, a second semicircular groove 2001, a fixed roller gear 2002, a linear pipe fitting 3001, a bent pipe fitting 3002, a bearing support 40, a bearing 50, a reduction gearbox 60, a reduction gearbox output gear 6001, an elastic cylindrical pin coupling 70, a motor 80, a hanger 90, a screw 100 and a hand wheel 110.

Detailed Description

As shown in fig. 1 to 7, a bending apparatus for a water wall tube is assumed to be located in an XYZ coordinate system, where an X axis is a longitudinal direction (i.e., an axial direction), a Y axis is a transverse direction (i.e., a direction perpendicular to the axial direction), and a Z axis is an up-down direction.

As shown in fig. 1 to 7, a water wall tube bending device includes a movable roller 10 and two fixed rollers 20, the axes of the movable roller 10 and the two fixed rollers 20 are both parallel to an X axis, the diameter of the movable roller 10 is D1, the diameter of the two fixed rollers 20 is D2, the diameter of a linear tube 3001 to be processed is D, the center distance between the two fixed rollers 20 is L, a radial gap is provided between the two fixed rollers 20, the width of the radial gap is S, S = L-D2> D1, that is, the projection of the movable roller 10 on the XY plane where the axes of the two fixed rollers 20 are located is located in the radial gap, and the moving path of the movable roller 10 is in the up-down direction. A plurality of first semicircular grooves 1001 are circumferentially formed on each of the movable rollers 10, the radius of each first semicircular groove 1001 is R1, a plurality of second semicircular grooves 2001 are circumferentially formed on each of the two fixed rollers 20, the radius of each second semicircular groove 2001 is R2, generally speaking, R1= R2, and d = R1+ R2, the first semicircular grooves 1001 are respectively opposed to the second semicircular grooves 2001 on the two fixed rollers 20 one by one, in the process that the movable roller 10 enters the radial gap under control, a cavity for accommodating the linear pipe fitting 3001 to be processed is respectively enclosed between the first semicircular groove 1001 and the second semicircular grooves 2001 at two sides of the first semicircular groove, the movable roller 10 presses a linear pipe 3001 previously stretched over the two fixed rollers 20 into a cavity defined by the first semicircular groove 1001 and the second semicircular grooves 2001 on both sides thereof, thereby forming a curved pipe 3002. In the embodiment, the linear pipe fitting 3001 is rolled into the bent pipe fitting 3002 by the rolling fit between the movable roller 10 with the semicircular groove and the two fixed rollers 20 with the semicircular grooves on the two sides, so that the purpose of bending the steel pipe can be achieved, the steel pipe can be prevented from being flattened, and the quality of a finished product is improved; secondly, a plurality of round pipes can be bent simultaneously, and the efficiency is improved; in addition, the bending position of the straight pipe fitting 3001 can be increased, the angle of the pipe fitting can be set for multiple times, the stability is high, the welding workload between pipe fitting joints is reduced, and the economic benefit is improved.

As shown in fig. 5 and 6, the number of the first semicircular grooves 1001 ranges from 2 to 20, the number of the first semicircular grooves 1001 may be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20, correspondingly, the number of the second semicircular grooves 2001 on each of the fixing rollers 20 is equal to the number of the first semicircular grooves 1001, and the number of the second semicircular grooves 2001 is respectively used for bending 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20 bent pipe members 3002 at the same time, and a larger number can be selected as required, so that the bending of a plurality of pipe members can be completed at a time, and the yield of each rolling can be increased.

As shown in fig. 1 to 4, the bending apparatus further includes two bearing supports 40, and both ends of the two fixed rollers 20 are rotatably connected to the bearing supports 40 through bearings 50.

As shown in fig. 1 and 7, the bending device further comprises a reduction gearbox 60, an elastic cylindrical pin coupler 70 and a motor 80, wherein the power input ends of the two fixed rollers 20 are provided with fixed roller gears 2002, the power output end of the reduction gearbox 60 is provided with a reduction gearbox output gear 6001, the reduction gearbox output gear 6001 is in meshing transmission with the fixed roller gears 2002, and the reduction gearbox 60 is in power connection with the motor 80 through the elastic cylindrical pin coupler 70.

As shown in fig. 1-4, the bending apparatus further includes a pressing mechanism, the pressing mechanism includes a hanger 90, a nut in a vertical direction is disposed on the hanger 90, a vertical screw 100 is screwed in the nut, a bottom of the screw 100 is connected to the movable roller 10, the screw 100 is rotated to adjust a pressing displacement of the movable roller 10, so as to adjust an included angle between two ends of the bent tube 3002, when an axial height of the movable roller 10 is pressed to be flush with an axial height of the fixed roller 20, the linear tube 3001 is bent into two parallel bent tubes 3002; when the axis of the movable roller 10 is pressed down to a height position higher than the axis of the fixed roller 20, both ends of the curved tube 3002 are bent to an obtuse angle of less than 180 °, so that the curved tube 3002 with various included angles can be bent, the bending position of the linear tube 3001 can be increased, the curved tube 3002 can be bent for multiple times, and the welding times can be reduced.

The difference from the above embodiments is that the screw 100 is provided with a handwheel 110, which facilitates the rotation of the screw 100, and the screw 100 can also be driven to press down by the rotation force.

The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments may be combined with each other into a new embodiment. The above description is only a preferred and practical embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent variations made by using the contents of the specification and the drawings are included in the scope of the present invention.

Claims

1. The bending device for the water wall pipe is characterized by comprising a movable roller and two fixed rollers, wherein the movable roller and the two fixed rollers are arranged in parallel, a radial gap is formed between the two fixed rollers, the projection of the movable roller on the plane where the axes of the two fixed rollers are located is located in the radial gap, a plurality of first semicircular grooves are formed in the movable roller in the circumferential direction, a plurality of second semicircular grooves are formed in the fixed rollers in the circumferential direction, the first semicircular grooves are respectively opposite to the second semicircular grooves on the two fixed rollers one by one, and the movable roller is controlled to enter the radial gap in the process that the movable roller presses linear pipe fittings which pre-span the two fixed rollers into the first semicircular grooves, And the second semicircular grooves on the two sides of the bent pipe fitting are respectively surrounded to form a cavity.

2. The bending apparatus according to claim 1, wherein the number of said first semicircular grooves ranges from 2 to 20, and correspondingly, the number of said second semicircular grooves on each of said fixed rollers is equal to the number of said first semicircular grooves.

3. The bending apparatus according to claim 1, wherein the fixed rollers are horizontally disposed, and the moving path of the movable roller is in an up-down direction.

4. The bending apparatus according to claim 3, further comprising a bearing support, wherein both of said stationary rollers are rotatably coupled to said bearing support by bearings.

5. The bending device according to claim 3, further comprising a reduction gearbox, an elastic cylindrical pin coupling and a motor, wherein the two fixed rollers are in transmission connection with the reduction gearbox through gears, and the reduction gearbox is in power connection with the motor through the elastic cylindrical pin coupling.

6. The bending apparatus according to claim 3, further comprising a hold-down mechanism including a hanger having a vertical lead screw assembly thereon for adjusting a hold-down displacement of said movable roller.