CN109868352B - Steel pipe water-cooling self-tempering process and device - Google Patents
Steel pipe water-cooling self-tempering process and device Download PDFInfo
- Publication number
- CN109868352B CN109868352B CN201910262399.3A CN201910262399A CN109868352B CN 109868352 B CN109868352 B CN 109868352B CN 201910262399 A CN201910262399 A CN 201910262399A CN 109868352 B CN109868352 B CN 109868352B
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- riding wheel
- water
- wall
- cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to a water-cooling self-tempering process for a steel pipe, which comprises the following steps: s1, high-temperature slow cooling: transferring the completely austenitized steel pipe to a riding wheel set, driving the steel pipe to rotate by the riding wheel set, and air-cooling the steel pipe to a temperature which is 50-100 ℃ below the heat preservation temperature for 10-50 s; s2, intermediate-temperature water rapid cooling: cooling the steel pipe simultaneously through a water spraying device on the outer wall of the steel pipe and a water spraying device on the inner wall of the steel pipe, so that the temperature of the steel pipe is cooled to 550-650 ℃ within 5-20 s; s3, low-temperature cooling: slowly cooling the steel pipe to room temperature, and carrying out self-tempering treatment; an apparatus for use in the process is also disclosed. The invention has the advantages that: according to the invention, the steel pipe is rapidly cooled to 550-650 ℃, fine pearlite can be obtained when the steel pipe is slowly cooled, the strength of the steel pipe is improved, the impact toughness of the material is stabilized, the tensile strength of the material can reach about 700MPa, the yield can reach more than 500MPa, the impact is more than 50J, other properties can meet high requirements of users, and the steel pipe is energy-saving and environment-friendly.
Description
Technical Field
The invention relates to the technical field of heat treatment of common low-carbon Mn steel and steel pipes with the wall thickness of more than 30mm, in particular to a water-cooling self-tempering process and a water-cooling self-tempering device for the steel pipes.
Background
The common low-carbon steel pipe is Mn steel, the wall thickness of the steel pipe is more than 30mm, along with the higher and higher requirements of customers on product performance, the wall thickness of the common 20MnV6 is more than or equal to 30mm, the tensile requirement is more than or equal to 630MPa, the yield requirement is more than or equal to 450MPa, meanwhile, the impact at minus 20 ℃ is more than or equal to 27J, the traditional normalizing process cannot meet the requirements of the customers, and most of the prior art adopt a quenching and tempering mode to meet the requirements of the customers.
After the steel pipe is subjected to quenching and tempering heat treatment at the present stage, the difference between the structure and the performance of the cross section of the steel pipe is huge due to the reasons of huge difference between the cooling speed of the inner surface and the cooling speed of the outer surface of the steel pipe and the cooling speed of the core part of the steel pipe, the structure after quenching is poor in stability, and the high-temperature durability of the steel pipe is not superior to that of the steel pipe subjected to the traditional normalizing and tempering.
There is a need for a steel pipe cooling apparatus that can simultaneously cool both the inner and outer surfaces of a steel pipe.
China CN108315532A discloses a water mist cooling method for a steel pipe, wherein the steel pipe is a high-pressure boiler pipe and the wall thickness of the steel pipe is more than 30mm, comprising the following steps: 1) in the high-temperature slow cooling zone, after the steel pipe which is completely austenitized is conveyed out of the furnace, air cooling is carried out until the temperature is 20-100 ℃ below the heat preservation temperature, and organization preparation is carried out for subsequent quick cooling; 2) in the medium-temperature water mist quick cooling area, the steel pipe is quickly cooled by water mist, the inner surface and the outer surface of the steel pipe are simultaneously cooled by a water mist cooling device, the temperature of the steel pipe is cooled to 330-550 ℃, and ferrite plus pearlite + (bainite) or martensite is precipitated; 3) the low-temperature cooling area is used for cooling the steel pipe to room temperature in an air mode and then performing treatment through a tempering process;
the steel pipe water mist cooling method disclosed by the patent is suitable for cooling high-pressure boiler pipes, the high-pressure boiler pipes are seamless steel pipes meeting the Chinese national standard GB/T5310-2008, the yield strength of the high-pressure boiler pipes obtained by heat treatment according to the method is 330-350 MPa, and the requirements of non-high-pressure boiler steel pipe customers on the tensile strength of low-carbon manganese steel pipes of 700MPa, the yield strength of 500MPa and the impact of more than 50J are not met.
Therefore, a water-cooling self-tempering process and a device for steel pipes are needed to rapidly cool the steel pipes to 550-650 ℃ to obtain fine pearlite, so as to improve the strength of the steel pipes and stabilize the impact toughness of the materials.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a water-cooling self-tempering process and a device for a steel pipe.
The purpose of the invention is realized by the following technical scheme:
a water-cooling self-tempering process for a steel pipe, wherein the steel pipe is common low-carbon Mn steel, the wall thickness of the steel pipe is more than 30mm, and the process comprises the following steps:
s1, high-temperature slow cooling: transferring the completely austenitized steel pipe to a riding wheel set, driving the steel pipe to rotate by the riding wheel set, and air-cooling the steel pipe to a temperature which is 50-100 ℃ below the heat preservation temperature for 10-50 s;
s2, intermediate-temperature water rapid cooling: the riding wheel group continues to drive the steel pipe to rotate, and the steel pipe is simultaneously cooled through the water spraying device on the outer wall of the steel pipe and the water spraying device on the inner wall of the steel pipe, so that the temperature of the steel pipe is cooled to 550-650 ℃ within 5-20 s;
s3, low-temperature cooling: and (5) continuously driving the steel pipe to rotate by the riding wheel set, slowly cooling the steel pipe to room temperature, and performing self-tempering treatment.
Further, in step S2, the water spray direction of the water spray device for the inner wall of the steel pipe is at a certain angle to the steel pipe axis so that the water is spirally advanced when sprayed into the steel pipe.
Further, in step S2, the water flow rate of the water spraying device on the outer wall of the steel pipe is 500-3000 m3Between/h; the water flow of the water spraying device on the inner wall of the steel pipe is 80-1000 m3The pressure is between 0.2 and 0.7 MPa.
Further, the rotating speed of the riding wheel set is between 60 and 600 rpm.
The device for the steel pipe water-cooling self-tempering process comprises a riding wheel group, a steel pipe outer wall water spraying device and a steel pipe inner wall water spraying device, wherein the riding wheel group comprises a plurality of pairs of left riding wheels and right riding wheels which are arranged at equal intervals along the axis of the riding wheel group, a rotary driving device for driving the left riding wheels and the right riding wheels to rotate at the same speed in the same direction is arranged beside the riding wheel group, and the steel pipes are placed on the left riding wheels and the right riding wheels and clamped between the left riding wheels and the right riding wheels; the water spraying device on the outer wall of the steel pipe is arranged right above the working section of the riding wheel group, the water spraying device on the inner wall of the steel pipe is arranged beside the working section of the riding wheel group, and the working ends of the water spraying device on the outer wall of the steel pipe and the water spraying device on the inner wall of the steel pipe are both arranged towards the working section of the riding wheel group; the water spraying device on the outer wall of the steel pipe comprises a plurality of spray heads which are arranged at equal intervals and are arranged towards the working area of the riding wheel set; the water spraying device on the inner wall of the steel pipe comprises a spraying cylinder, the spraying cylinder is arranged beside the riding wheel set and is positioned on an extension line of the axis of the steel pipe, the working direction of the spraying cylinder is arranged towards the inside of the steel pipe, and the working direction of the spraying cylinder is not overlapped with the axis of the steel pipe; the input ends of the spray head and the spray cylinder are connected with a water pump.
Furthermore, the rotary driving device comprises a motor, a gear box, a first transmission shaft, a second transmission shaft and a first bearing seat, the motor is in transmission connection with the first transmission shaft and the second transmission shaft through the gear box, the first transmission shaft and the second transmission shaft are arranged in parallel, the first transmission shaft is in transmission connection with each left riding wheel, the second transmission shaft is in transmission connection with each right riding wheel, and the first transmission shaft and the second transmission shaft are installed on the ground through the first bearing seats.
Furthermore, the specifications of the left riding wheel and the right riding wheel are the same, the left riding wheel and the right riding wheel are arranged along the axial direction of the left riding wheel and the right riding wheel in a staggered mode, and the distance between the axial lines of the left riding wheel and the right riding wheel is smaller than the diameter of the left riding wheel.
Further, steel pipe outer wall water jet equipment is still including support, sharp slip table and spray the crossbeam, and the support is striden in the top of riding wheel group, and the stiff end of sharp slip table is installed on the crossbeam or the stand of support, sprays crossbeam fixed mounting in the work end of sharp slip table, and the shower nozzle is installed on spraying the crossbeam and the shower nozzle is arranged along the length direction equidistance that sprays the crossbeam.
Further, the linear sliding table comprises a sliding rail, a sliding block, a motor, a gear and a rack, the sliding rail and the rack are arranged on the top end of the cross beam of the support in parallel, the sliding block is slidably mounted on the sliding rail through a roller, the motor is fixedly mounted on the sliding block, the gear is mounted on an output shaft of the motor, the gear is meshed with the rack, and the spraying cross beam is fixedly connected with the sliding block.
Furthermore, the clamping plates extending vertically downwards are mounted on two sides of the sliding block, the clamping plates clamp the cross beam of the support in the middle, a gap is reserved between each clamping plate and the cross beam of the support, each clamping plate is provided with a roller, each roller is rotatably mounted on each clamping plate, a rotating shaft of each roller is vertically arranged, and a cylindrical surface of each roller penetrates through each clamping plate and abuts against the cross beam of the support.
Further, the water spraying device for the inner wall of the steel pipe comprises a spraying cylinder support, a rotating shaft, a second bearing seat and a servo motor, wherein the spraying cylinder is fixedly installed on the spraying cylinder support, the spraying cylinder support is fixedly connected with the rotating shaft, the rotating shaft is rotatably installed at the working end of the second bearing seat, the servo motor is fixedly installed on the second bearing seat, and an output shaft of the servo motor is in transmission connection with the rotating shaft.
The invention has the following advantages:
1. after the steel pipe is treated by the process and the device, the steel pipe is rapidly cooled to 550-650 ℃, fine pearlite can be obtained when the steel pipe is slowly cooled, the strength of the steel pipe is improved, the impact toughness of the material is stabilized, the tensile strength of the material can reach about 700MPa, the yield can reach more than 500MPa, the impact is more than 50J, and other properties can meet high requirements of users.
2. The invention realizes the effective control of the cooling speed, finally obtains ideal performance and structure, obviously improves the performance of the thick-wall low-carbon Mn steel, avoids the defect that the normalizing strength can not be achieved, reduces the cost of adopting quenching and tempering production, and is energy-saving and environment-friendly.
3. Before a glowing steel pipe is placed on a riding wheel group, a linear sliding table drives a spraying cross beam to be separated from the position right above the riding wheel group, so that mechanical equipment can place the steel pipe on the riding wheel group conveniently, after the steel pipe is placed on a left riding wheel and a right riding wheel, the linear sliding table drives the spraying cross beam to move to the position right above the riding wheel group, meanwhile, a motor drives a first transmission shaft and a second transmission shaft to rotate in the same direction and at the same speed, the first transmission shaft and the second transmission shaft respectively drive the left riding wheel and the right riding wheel to rotate in the same direction and at the same speed, so that the steel pipe rolls on the riding wheel group but the position is unchanged, a water pump provides water flow with a certain amount of pressure for a spray head and a spray cylinder support, the spray head sprays water downwards from the upper part of the steel pipe, so as to cool the outer wall of the steel pipe, the spray cylinder sprays water from the side surface of the steel pipe to the inner wall of the steel, the flowing distance of water flow in the steel pipe is prolonged, and the cooling effect is better.
4. The device can cool off the inside and outside surface of steel pipe fast, and cooling rate is fast, and is more energy-conserving.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a CCT graph of the present invention;
FIG. 2 is a side view of a water cooling apparatus for a steel pipe according to an embodiment of the present invention;
FIG. 3 is a top view of a water cooling apparatus for steel pipes according to an embodiment of the present invention;
FIG. 4 is a perspective view of a water cooling apparatus for a steel pipe according to an embodiment of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a front view of a water cooling apparatus for steel pipes according to an embodiment of the present invention;
FIG. 7 is a perspective view of a water spraying device for the inner wall of a steel pipe of the water cooling device for a steel pipe according to the embodiment of the present invention;
FIG. 8 is a sectional view of a water spraying device for the inner wall of a steel pipe of the water cooling device for a steel pipe according to the embodiment of the present invention;
in the figure:
1-riding wheel groups; 1 a-a left riding wheel; 1 b-a right riding wheel;
2-a rotation drive; 2 a-a motor; 2 b-a gearbox; 2 c-a first drive shaft; 2 d-a second drive shaft; 2 e-a first bearing seat;
3-a water spraying device for the outer wall of the steel pipe; 3 a-a spray head; 3 b-a scaffold; 3 c-linear slide; 3c 1-slide rail; 3c2 — slide; 3c 3-motor; 3c 4-gear; 3c 5-rack; 3c 6-splint; 3c 7-roller; 3 d-spraying the beam;
4-a water spraying device on the inner wall of the steel pipe; 4 a-a spray cylinder; 4 b-a spray cylinder bracket; 4 c-axis of rotation; 4 d-second bearing seat; 4 e-servo motor.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and the specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being fixed or detachable or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A water-cooling self-tempering process for a steel pipe, wherein the steel pipe is common low-carbon Mn steel, the wall thickness of the steel pipe is more than 30mm, and the process comprises the following steps:
s1, high-temperature slow cooling: transferring the completely austenitized steel pipe to a riding wheel group 1, driving the steel pipe to rotate by the riding wheel group 1, keeping the rotating speed of the riding wheel group 1 between 60 and 600rpm all the time, air-cooling the steel pipe to a temperature which is 50 to 100 ℃ below the heat preservation temperature according to the difference of wall thickness, and keeping the air-cooling time to be 10 to 50s according to the difference of wall thickness and temperature change, wherein the main purpose of the process is uniform organization and preparation work is prepared for the following process;
s2, intermediate-temperature water rapid cooling: the riding wheel group 1 continues to drive the steel pipe to rotate, and the water spraying device on the outer wall of the steel pipe and the water spraying device on the inner wall of the steel pipe simultaneously carry out the water spraying on the steel pipeCooling, wherein the water spraying direction of the water spraying device on the inner wall of the steel pipe forms a certain angle with the axis of the steel pipe, so that water is sprayed into the steel pipe and advances in a spiral mode, the temperature of the steel pipe is cooled to 550-650 ℃ within 5-20 s, and the water flow of the water spraying device on the outer wall of the steel pipe is 500-3000 m3Between/h; the water flow of the water spraying device on the inner wall of the steel pipe is 80-1000 m3The pressure is between 0.2 and 0.7MPa, and the water flow can be adjusted through the frequency of a water pump motor according to different wall thicknesses and outer diameters of the steel pipes;
s3, low-temperature cooling: and (3) continuously driving the steel pipe to rotate by the riding wheel set 1, slowly cooling the steel pipe to room temperature, and performing self-tempering treatment.
Referring to fig. 1, when the steel pipe is rapidly cooled to between 550 and 650 ℃, and then is slowly cooled, fine pearlite can be obtained, the strength of the steel pipe is improved, and the impact toughness of the material is stabilized. After the treatment in this way: the tensile strength of the material can reach about 700MPa, the yield can reach more than 500MPa, the impact is more than 50J, and other properties can meet high requirements of users.
Referring to fig. 2 to 8, the device for the steel pipe water-cooling self-tempering process comprises a riding wheel set 1, a steel pipe outer wall water spraying device 3 and a steel pipe inner wall water spraying device 4, wherein the riding wheel set 1 comprises a plurality of pairs of left riding wheels 1a and right riding wheels 1b which are arranged at equal intervals along the axis of the riding wheel set, a rotary driving device 2 for driving the left riding wheels 1a and the right riding wheels 1b to rotate at the same direction and speed is arranged beside the riding wheel set 1, and the steel pipes are placed on the left riding wheels 1a and the right riding wheels 1b and are clamped between the left riding wheels 1a and the right riding wheels 1 b; the steel pipe outer wall water spraying device 3 is arranged right above the working section of the riding wheel group 1, the steel pipe inner wall water spraying device 4 is arranged beside the working section of the riding wheel group 1, and the working ends of the steel pipe outer wall water spraying device 3 and the steel pipe inner wall water spraying device 4 are both arranged towards the working section of the riding wheel group 1;
the water spraying device 3 on the outer wall of the steel pipe comprises a plurality of spray heads 3a which are arranged at equal intervals and are arranged towards the working area of the riding wheel set 1;
the water spraying device 4 on the inner wall of the steel pipe comprises a spraying cylinder 4a, the spraying cylinder 4a is arranged beside the riding wheel set 1 and is positioned on an extension line of the axis of the steel pipe, the working direction of the spraying cylinder 4a is arranged towards the inside of the steel pipe, and the working direction of the spraying cylinder 4a is not overlapped with the axis of the steel pipe;
the input ends of the spray head 3a and the spray cylinder 4a are both connected with a water pump.
The steel pipe is placed and is lifted on a plurality of pairs of left riding wheels 1a and right riding wheels 1b, the rotary driving device 2 drives the left riding wheels 1a and the right riding wheels 1b to rotate in the same direction and at the same speed, so that the steel pipe rolls on the riding wheel sets 1 but the position is unchanged, the water pump provides water flow with a certain amount of pressure for the spray head 3a and the spray cylinder support 4b, the spray head 3a sprays water downwards from the upper part of the steel pipe, the outer wall of the steel pipe is cooled, the spray cylinder 4a sprays water to the inner part of the steel pipe from the side surface of the steel pipe, the inner wall of the steel pipe is cooled, the working direction of the spray cylinder 4a is not coincident with the axis of the steel pipe, so that the water sprayed by the spray cylinder 4a advances along a spiral path on the inner wall of the steel pipe, the.
The rotary driving device 2 comprises a motor 2a, a gear box 2b, a first transmission shaft 2c, a second transmission shaft 2d and a first bearing seat 2e, the motor 2a is in transmission connection with the first transmission shaft 2c and the second transmission shaft 2d through the gear box 2b, the first transmission shaft 2c and the second transmission shaft 2d are arranged in parallel, the first transmission shaft 2c is in transmission connection with each left riding wheel 1a, the second transmission shaft 2d is in transmission connection with each right riding wheel 1b, and the first transmission shaft 2c and the second transmission shaft 2d are installed on the ground through the first bearing seats 2 e.
The gear box 2b is a single-input-shaft double-output-shaft speed reducer, the transmission ratio of two output shafts of the speed reducer is the same, the speed reducer is the existing equipment which can be directly purchased in the market, so that the motor 2a can drive the first transmission shaft 2c and the second transmission shaft 2d to rotate at the same speed in the same direction, and the first bearing seat 2e is used for supporting the weight of the left riding wheel 1a, the right riding wheel 1b, the first transmission shaft 2c and the second transmission shaft 2 d.
The left riding wheel 1a and the right riding wheel 1b are identical in specification, the left riding wheel 1a and the right riding wheel 1b are arranged in a staggered mode along the axial direction of the left riding wheel 1a and the right riding wheel 1b, and the distance between the axial lines of the left riding wheel 1a and the right riding wheel 1b is smaller than the diameter of the left riding wheel 1 a.
The distance between the axis of left riding wheel 1a and right riding wheel 1b is less than the diameter of left riding wheel 1a for left riding wheel 1a and the projection coincidence of right riding wheel 1b in its axis direction, thereby make the less steel pipe of pipe diameter also can be lifted by riding wheel group 1, the steel pipe that is little again also can not drop from between left riding wheel 1a and the right riding wheel 1b, left riding wheel 1a and right riding wheel 1b make contactless between left riding wheel 1a and the right riding wheel 1b along its crisscross setting of axis direction.
The water spraying device 3 on the outer wall of the steel pipe further comprises a support 3b, a linear sliding table 3c and a spraying cross beam 3d, the support 3b is spanned above the riding wheel set 1, the fixed end of the linear sliding table 3c is installed on the cross beam or the stand column of the support 3b, the spraying cross beam 3d is fixedly installed at the working end of the linear sliding table 3c, and the spray heads 3a are installed on the spraying cross beam 3d and are arrayed along the length direction of the spraying cross beam 3d at equal intervals.
The linear sliding table 3c can be arranged on a cross beam of the bracket 3b, so that the spraying cross beam 3d is driven to move horizontally, and the spraying cross beam 3d can be close to or far away from the riding wheel set 1; the linear sliding table 3c can also be arranged on the upright post of the bracket 3b, so that the spraying beam 3d is driven to vertically move, and the spraying beam 3d can be close to or far away from the riding wheel set 1; when the spraying beam 3d is close to the riding wheel group 1, the spray head 3a sprays water to cool the steel pipe, and when the spraying beam 3d is far away from the riding wheel group 1, a worker places the steel pipe to be cooled on the riding wheel group 1 through mechanical equipment, or moves the steel pipe which is cooled off out of the working interval of the riding wheel group 1.
The linear sliding table 3c comprises a sliding rail 3c1, a sliding block 3c2, a motor 3c3, a gear 3c4 and a rack 3c5, the sliding rail 3c1 and the rack 3c5 are arranged at the top end of a cross beam of the bracket 3b in parallel, the sliding block 3c2 is slidably mounted on the sliding rail 3c1 through a roller, a motor 3c3 is fixedly mounted on the sliding block 3c2, a gear 3c4 is mounted on an output shaft of the motor 3c3, the gear 3c4 is meshed with the rack 3c5, and the spraying cross beam 3d is fixedly connected with the sliding block 3c 2.
The sliding rail 3c1 and the rack 3c5 both extend horizontally along the cross beam of the bracket 3b, and the gear 3c4 is meshed with the rack 3c5, so when the motor 3c3 drives the gear 3c4 to rotate, the motor 3c3 drives the slider 3c2 to slide along the sliding rail 3c1, and the slider 3c2 drives the spraying cross beam 3d to slide, so that the spraying cross beam 3d can horizontally move to the position right above the riding wheel set 1 or far away from the riding wheel set 1;
if need install straight line slip table 3c on the stand of support 3b, only need install slide rail 3c1 on the stand of support 3b this moment, then gear 3c4 and rack 3c5 complex moving mechanism change the vertical ball screw slip table that sets up of working direction can, the ball screw slip table has self-locking function, is applicable to the vertical reciprocating motion of drive spray beam 3 d.
The two sides of the sliding block 3c2 are provided with clamping plates 3c6 which vertically extend downwards, the clamping plates 3c6 clamp the cross beam of the bracket 3b in the middle, a gap is reserved between the clamping plate 3c6 and the cross beam of the bracket 3b, each clamping plate 3c6 is provided with a roller 3c7, the rollers 3c7 are rotatably arranged on the clamping plates 3c6, the rotating shafts of the rollers 3c7 are vertically arranged, and the cylindrical surfaces of the rollers 3c7 penetrate through the clamping plates 3c6 and abut against the cross beam of the bracket 3 b.
The sliding block 3c2 may shake when sliding along the sliding rail 3c1, and at this time, the two pairs of rollers 3c7 sandwich the cross beam of the bracket 3b, and the rollers 3c7 roll on the side surface of the cross beam of the bracket 3b when the sliding block 3c2 slides along the sliding rail 3c1, so that the working stability of the linear sliding table 3c is improved on the premise of not influencing the sliding rate of the sliding block 3c 2.
The water spraying device 4 on the inner wall of the steel pipe further comprises a spraying cylinder support 4b, a rotating shaft 4c, a second bearing seat 4d and a servo motor 4e, wherein the spraying cylinder 4a is fixedly installed on the spraying cylinder support 4b, the spraying cylinder support 4b is fixedly connected with the rotating shaft 4c, the rotating shaft 4c is rotatably installed at the working end of the second bearing seat 4d, the servo motor 4e is fixedly installed on the second bearing seat 4d, and an output shaft of the servo motor 4e is in transmission connection with the rotating shaft 4 c.
The working principle is as follows: before a glowing steel pipe is placed on the riding wheel set 1, the linear sliding table 3c drives the spraying cross beam 3d to be separated from the position right above the riding wheel set 1, so that mechanical equipment can place the steel pipe on the riding wheel set 1, after the steel pipe is placed on the left riding wheel 1a and the right riding wheel 1b, the linear sliding table 3c drives the spraying cross beam 3d to move to the position right above the riding wheel set 1, meanwhile, the motor 2a drives the first transmission shaft 2c and the second transmission shaft 2d to rotate at the same speed in the same direction, the first transmission shaft 2c and the second transmission shaft 2d respectively drive the left riding wheel 1a and the right riding wheel 1b to rotate at the same speed in the same direction, so that the steel pipe rolls on the riding wheel set 1 but the position is unchanged, the water pump provides water flow with a certain amount of pressure to the spray nozzle 3a and the spray cylinder support 4b, the spray nozzle 3a sprays water downwards from the position above the steel pipe, so as to cool the outer wall, therefore, the inner wall of the steel pipe is cooled, the working direction of the spraying cylinder 4a is not coincident with the axis of the steel pipe, so that the water sprayed by the spraying cylinder 4a advances along a spiral path on the inner wall of the steel pipe, the flowing distance of water flow in the steel pipe is prolonged, and the cooling effect is better.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a steel pipe water-cooling is from tempering technology, the steel pipe is ordinary low carbon Mn steel and the wall thickness of steel pipe is more than 30mm, its characterized in that: the method comprises the following steps:
s1, high-temperature slow cooling: transferring the completely austenitized steel pipe to a riding wheel set, driving the steel pipe to rotate by the riding wheel set, and air-cooling the steel pipe to a temperature which is 50-100 ℃ below the heat preservation temperature for 10-50 s;
s2, intermediate-temperature water rapid cooling: the riding wheel group continues to drive the steel pipe to rotate, and the steel pipe is simultaneously cooled through the water spraying device on the outer wall of the steel pipe and the water spraying device on the inner wall of the steel pipe, so that the temperature of the steel pipe is cooled to 550-650 ℃ within 5-20 s; the water spraying direction of the water spraying device on the inner wall of the steel pipe and the axis of the steel pipe form a certain angle, so that the water is sprayed into the steel pipe and advances in a spiral mode; the water flow of the water spraying device on the outer wall of the steel pipe is 500-3000 m3Between/h; the water flow of the water spraying device on the inner wall of the steel pipe is 80-1000 m3The pressure is between 0.2 and 0.7 MPa;
s3, low-temperature cooling: the riding wheel set continues to drive the steel pipe to rotate, the steel pipe is slowly cooled to the room temperature, and self-tempering treatment is carried out;
the rotating speed of the riding wheel set is between 60 rpm and 600 rpm;
the device for the steel pipe water-cooling self-tempering process comprises a riding wheel group, a steel pipe outer wall water spraying device and a steel pipe inner wall water spraying device, wherein the riding wheel group comprises a plurality of pairs of left riding wheels and right riding wheels which are arranged at equal intervals along the axis of the riding wheel group, a rotary driving device for driving the left riding wheels and the right riding wheels to rotate at the same speed in the same direction is arranged beside the riding wheel group, and the steel pipes are placed on the left riding wheels and the right riding wheels and clamped between the left riding wheels and the right riding wheels; the water spraying device on the outer wall of the steel pipe is arranged right above the working section of the riding wheel group, the water spraying device on the inner wall of the steel pipe is arranged beside the working section of the riding wheel group, and the working ends of the water spraying device on the outer wall of the steel pipe and the water spraying device on the inner wall of the steel pipe are both arranged towards the working section of the riding wheel group; the water spraying device on the outer wall of the steel pipe comprises a plurality of spray heads which are arranged at equal intervals and are arranged towards the working area of the riding wheel set; the water spraying device on the inner wall of the steel pipe comprises a spraying cylinder, the spraying cylinder is arranged beside the riding wheel set and is positioned on an extension line of the axis of the steel pipe, the working direction of the spraying cylinder is arranged towards the inside of the steel pipe, and the working direction of the spraying cylinder is not overlapped with the axis of the steel pipe; the input ends of the spray head and the spray cylinder are connected with a water pump; the water spraying device for the inner wall of the steel pipe comprises a spraying barrel support, a rotating shaft, a second bearing seat and a servo motor, wherein the spraying barrel is fixedly installed on the spraying barrel support, the spraying barrel support is fixedly connected with the rotating shaft, the rotating shaft is rotatably installed at the working end of the second bearing seat, the servo motor is fixedly installed on the second bearing seat, and an output shaft of the servo motor is in transmission connection with the rotating shaft.
2. The water-cooling self-tempering process for the steel pipe as claimed in claim 1, wherein: the rotary driving device comprises a motor, a gear box, a first transmission shaft, a second transmission shaft and a first bearing seat, wherein the motor is in transmission connection with the first transmission shaft and the second transmission shaft through the gear box, the first transmission shaft and the second transmission shaft are arranged in parallel, the first transmission shaft is in transmission connection with each left riding wheel, the second transmission shaft is in transmission connection with each right riding wheel, and the first transmission shaft and the second transmission shaft are installed on the ground through a plurality of first bearing seats.
3. The water-cooling self-tempering process for the steel pipe as claimed in claim 1, wherein: the left riding wheel and the right riding wheel are identical in specification, the left riding wheel and the right riding wheel are arranged in a staggered mode along the axis direction of the left riding wheel and the right riding wheel, and the distance between the axes of the left riding wheel and the right riding wheel is smaller than the diameter of the left riding wheel.
4. The water-cooling self-tempering process for the steel pipe as claimed in claim 1, wherein: the water spraying device for the outer wall of the steel pipe further comprises a support, a linear sliding table and a spraying cross beam, wherein the support is spanned above the riding wheel set, the fixed end of the linear sliding table is installed on the cross beam or the stand column of the support, the spraying cross beam is fixedly installed at the working end of the linear sliding table, and the spray heads are installed on the spraying cross beam and are arranged at equal intervals along the length direction of the spraying cross beam.
5. The water-cooling self-tempering process for the steel pipe as claimed in claim 4, wherein: the linear sliding table comprises a sliding rail, a sliding block, a motor, a gear and a rack, the sliding rail and the rack are arranged on the top end of the cross beam of the support in parallel, the sliding block is slidably arranged on the sliding rail through a roller, the motor is fixedly arranged on the sliding block, the gear is arranged on an output shaft of the motor, the gear is meshed with the rack, and the spraying cross beam is fixedly connected with the sliding block.
6. The water-cooling self-tempering process for the steel pipe as claimed in claim 5, wherein: the utility model discloses a support, including the support, the crossbeam of support is installed to the face of support, the both sides of slider are installed vertical downwardly extending's splint, and splint are established with the crossbeam clamp of support in the middle of, leave the clearance between the crossbeam of splint and support, all are provided with the gyro wheel on every splint, and the gyro wheel is rotatably installed on splint, and the rotation axis of gyro wheel is vertical to be set up, and the face of cylinder of gyro wheel runs through splint and butt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910262399.3A CN109868352B (en) | 2019-04-02 | 2019-04-02 | Steel pipe water-cooling self-tempering process and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910262399.3A CN109868352B (en) | 2019-04-02 | 2019-04-02 | Steel pipe water-cooling self-tempering process and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109868352A CN109868352A (en) | 2019-06-11 |
| CN109868352B true CN109868352B (en) | 2021-06-08 |
Family
ID=66921849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910262399.3A Active CN109868352B (en) | 2019-04-02 | 2019-04-02 | Steel pipe water-cooling self-tempering process and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109868352B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ308471B6 (en) * | 2019-08-19 | 2020-09-02 | Západočeská Univerzita V Plzni | Method of manufacturing steel parts from AHS steel by controlled local cooling with a medium, using the formation of a multiphase structure with intermittent cooling at the required temperature |
| CN111744981B (en) * | 2020-05-17 | 2022-01-07 | 浙江明贺钢管有限公司 | Lubricating equipment and lubricating method for large-diameter stainless steel pipe |
| CN113564327A (en) * | 2021-07-20 | 2021-10-29 | 浙江泰富无缝钢管有限公司 | Heat treatment process suitable for manufacturing thick-wall steel pipe for power station boiler |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202881331U (en) * | 2012-10-24 | 2013-04-17 | 安徽应升钢管制造有限公司 | Thermal treatment cooling device for seamless steel pipes |
| CN108315532B (en) * | 2018-01-12 | 2019-05-14 | 湖北新冶钢特种钢管有限公司 | Steel pipe water fog cooling means |
-
2019
- 2019-04-02 CN CN201910262399.3A patent/CN109868352B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109868352A (en) | 2019-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109868352B (en) | Steel pipe water-cooling self-tempering process and device | |
| CN113293268B (en) | Use method of cylindrical shell section heat treatment device | |
| CN101818238B (en) | Roller-hearth solution furnace | |
| CN209759527U (en) | steel pipe water-cooling self-tempering device | |
| CN116516120B (en) | New energy wind power generation flange spray cooling equipment and method | |
| CN107385171A (en) | Spray quenching device and rod iron production line | |
| CN202881331U (en) | Thermal treatment cooling device for seamless steel pipes | |
| CN101942553A (en) | Offline or online integral quenching/tempering thermal treatment production line for standard steel rail and profiled steel rail | |
| CN1075985A (en) | Heat treatment method for steel rail and device | |
| CN104017960B (en) | A kind of many part spray quenching devices | |
| CN113789426A (en) | Induction quenching device for shaft head end surface of shaft part and using method thereof | |
| CN201485486U (en) | Spray quenching machine tool | |
| CN201793654U (en) | Off-line or on-line integral quenching and tempering heat treatment production line for standard steel rails and special-shaped steel rails | |
| CN201648468U (en) | Roller-hearth type solid solution furnace | |
| CN106244784B (en) | A kind of quenching apparatus for thrust wheel of digging machine spindle nose collar | |
| CN208136293U (en) | Roll sprays machine of quenching | |
| CN207862431U (en) | sucker rod surface thermal spraying device | |
| CN214383783U (en) | Cast steel roll heat treatment spray quenching machine nozzle mounting structure | |
| CN109385514B (en) | Online hierarchical formula oil-cooled guenching unit | |
| CN220837300U (en) | Online heat treatment straightener of square rectangular pipe | |
| CN114369706B (en) | HW steel horizontal roll collar heat treatment spray quenching device and heat treatment method thereof | |
| CN205393346U (en) | Spinning equipment of compound water pipe of heavy -calibre | |
| CN203866363U (en) | Spray quenching device for multiple parts | |
| CN204455206U (en) | Constant velocity cardan joint tubular shaft quenching device diplocardia inductor block | |
| CN220541622U (en) | Hot air drying device, cooling drying device and internal stress eliminating complete equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |