CN111424155A - Combined type steel pipe quenching equipment and method - Google Patents
Combined type steel pipe quenching equipment and method Download PDFInfo
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- CN111424155A CN111424155A CN202010269677.0A CN202010269677A CN111424155A CN 111424155 A CN111424155 A CN 111424155A CN 202010269677 A CN202010269677 A CN 202010269677A CN 111424155 A CN111424155 A CN 111424155A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 249
- 239000010959 steel Substances 0.000 title claims abstract description 249
- 238000010791 quenching Methods 0.000 title claims abstract description 191
- 230000000171 quenching effect Effects 0.000 title claims abstract description 183
- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000005507 spraying Methods 0.000 claims abstract description 135
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 116
- 230000008569 process Effects 0.000 claims abstract description 42
- 238000003825 pressing Methods 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 37
- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 238000003756 stirring Methods 0.000 claims abstract description 20
- 238000007654 immersion Methods 0.000 claims abstract description 17
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 12
- 238000007599 discharging Methods 0.000 claims abstract description 11
- 239000002131 composite material Substances 0.000 claims description 18
- 239000003921 oil Substances 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 238000002791 soaking Methods 0.000 claims description 10
- 210000000078 claw Anatomy 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000007921 spray Substances 0.000 description 15
- 238000007598 dipping method Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/63—Quenching devices for bath quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
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Abstract
The invention provides a combined steel pipe quenching device and a method, which comprises an external spraying and internal spraying system, a steel pipe rotating device, a material stirring device, a pressing device and a quenching tank, wherein a water level adjusting device and a feeding device are arranged on the feeding side of the quenching tank, the steel pipe rotating device and the material stirring device are both arranged in the center of the quenching tank, the material stirring device is close to the discharging side of the quenching tank, the pressing device is arranged above the steel pipe rotating device, a steel pipe is arranged between the steel pipe rotating device and the pressing device, and the quenching tank is used for quenching the steel pipe by matching with the external spraying and internal spraying system. The feeding device can be used for lightly taking and lightly placing the hot steel pipes in the feeding process, so that the impact on the steel pipes during feeding is avoided. The rotating device is driven by a motor, and compared with the existing chain transmission, the rotating device is high in rotating accuracy and small in equipment maintenance amount. The lifting of the water level adjusting plate is adjusted by the hydraulic oil cylinder, the water level in the water tank during the steel pipe quenching is accurately controlled, and the requirements of different quenching processes and the semi-immersion quenching of steel pipes with different diameters can be met.
Description
Technical Field
The invention belongs to the technical field of steel pipe production and processing, and particularly relates to composite steel pipe quenching equipment and a method.
Background
At present, the main steel pipe quenching process equipment in production mainly comprises two types: the other is outer spraying and inner spraying type quenching equipment, and the other is immersed steel pipe quenching equipment in a groove.
The outer spraying and inner spraying type quenching equipment is used for spraying and quenching the outer wall of a heated steel pipe rotating at a high speed and spraying water to the inner wall of the pipe end by using high-speed water, so that the inner wall and the outer wall of the steel pipe are rapidly cooled simultaneously.
The steel pipe quenching equipment with immersed type in the tank is characterized in that a steel pipe which rotates at a high speed after being heated is directly and completely immersed in water, and water is sprayed to the inner wall of the pipe end by high-speed water, so that the purpose of quenching the inner wall and the outer wall at the same time can be achieved. The process mode is mainly suitable for steel pipes with large wall thickness values. The main problems are that the steel pipe is easy to be cooled unevenly along the whole length direction when immersed in water, and the quenching bending phenomenon often occurs.
In addition, the existing equipment adopts a feeding inclined table to roll the steel pipe onto a rotating device, so that the surface of the hot steel pipe is easy to be damaged by collision, and the quenching mode which can be realized is single and only suitable for one process.
Disclosure of Invention
The invention aims to provide a composite steel pipe quenching device which overcomes the technical problems in the prior art.
The invention also aims to provide a composite steel pipe quenching method which can realize various quenching processes of the existing steel pipe.
Therefore, the technical scheme provided by the invention is as follows:
a combined type steel pipe quenching device comprises an external spraying and internal spraying system, a steel pipe rotating device, a material shifting device, a pressing device and a quenching tank, wherein a water level adjusting device and a feeding device are arranged on the feeding side of the quenching tank, a discharging inclined table is arranged on the discharging side of a semi-immersion tank, a platform is arranged in the middle of the quenching tank, the rotating device and the material shifting device are arranged on the platform, the material shifting device is close to the discharging side and is connected with the discharging inclined table, and at least two material shifting devices are arranged at two shaft ends of the rotating device respectively;
the pressing device is arranged above the steel pipe rotating device, a steel pipe is arranged between the steel pipe rotating device and the pressing device, and the quenching tank is used for quenching the steel pipe in cooperation with the external spraying and internal spraying system.
The feeding device comprises a support and a lifting hook, a rack is arranged on a cross rod of the support, a screw nut pair is connected onto the lifting hook, the top of the lifting hook is fixedly connected with a nut of the screw nut pair, a gear is arranged on the upper portion of a screw of the screw nut pair, and the gear is meshed with the rack.
The steel pipe rotating device comprises a motor, a double-output-shaft speed reducer, transmission shafts, a coupler and a rotating supporting wheel, wherein the motor is connected with the double-output-shaft speed reducer, the transmission shafts are in multiple sections, two output shafts of the double-output-shaft speed reducer are connected with the transmission shafts, the coupler is arranged between two adjacent sections of the transmission shafts, the rotating supporting wheel is installed on the transmission shafts, the rotating device is arranged on the support, and the support is arranged on a platform of the quenching tank.
The water level adjusting device comprises a water level adjusting plate and a hydraulic oil cylinder, the water level adjusting plate is connected with the movable end of the hydraulic oil cylinder, and a displacement sensor is arranged on the hydraulic oil cylinder;
one side of the quenching tank is provided with a notch and a guide plate, the water level adjusting plate is arranged at the notch, the guide plate is provided with a guide groove, and the side edge of the water level adjusting plate is arranged in the guide groove.
The material shifting device comprises a material shifting hook, a supporting seat and a material shifting motor, the material shifting hook is arranged on the supporting seat 22, and the supporting seat is arranged on a platform of the quenching tank.
The outer spraying system comprises a plurality of outer spraying nozzles and a plurality of inner spraying nozzles, the outer spraying nozzles are uniformly arranged along the axial direction of the steel pipe, and the inner spraying nozzles are opposite to one end of the steel pipe;
the pressing device comprises a pressing claw, a connecting shaft and an oil cylinder, and the pressing claw is connected with the oil cylinder through the connecting shaft.
Still include water charging system, water charging system and quenching groove intercommunication.
And a liquid level detection device is arranged in the quenching tank.
A composite steel pipe quenching method adopts composite steel pipe quenching equipment, and comprises the following steps:
step 1) adjusting a water level adjusting plate of a water level adjusting device to a water level height required by quenching of a quenching tank according to a quenching process of a steel pipe, wherein the water level is 5-10cm lower than the lowest point of the position of the steel pipe on a steel pipe rotating device;
lifting the heated steel pipe by a lifting hook, moving the steel pipe to a position right above a steel pipe rotating device through a rack and a gear, then lowering the lifting hook, placing the steel pipe on the rotating steel pipe rotating device, and rotating the steel pipe at a rotating speed of not more than 50 r/min;
step 3), pressing the pressing device on the rotating steel pipe, increasing the rotating speed of the steel pipe rotating device to enable the steel pipe to rotate at the rotating speed of 80-120r/min, and then quenching the steel pipe through an external spraying and internal spraying system or an external spraying and internal spraying system and a quenching tank;
and 4) stopping water supply of the external spraying and internal spraying system after the steel pipe is quenched, loosening the steel pipe by the pressing device, and pulling the steel pipe out of a quenching station by the rotation of the material pulling device to finish quenching of the steel pipe.
The quenching process at least comprises two types of external spraying and internal spraying, external spraying and internal spraying and semi-soaking.
The invention has the beneficial effects that:
according to the composite steel pipe quenching device, the feeding device can be used for lightly taking and lightly placing the hot steel pipe in the feeding process, so that the impact on the steel pipe in the feeding process is avoided. The rotating device is driven by a motor, and has high rotating accuracy with a supporting wheel in the existing chain transmission scheme and small equipment maintenance workload. The water level adjusting device adjusts the lifting of the water level adjusting plate through the oil cylinder with the displacement sensor, accurately controls the water level in the water tank during the steel pipe quenching, and can meet the requirements of different quenching processes and the semi-immersion quenching of steel pipes with different diameters.
The invention can realize at least two quenching processes of the steel pipe: the quenching requirements of steel pipes with different specifications can be met by external spraying and internal spraying, external spraying and internal spraying and half-soaking. The outer-spraying inner-spraying is suitable for steel pipes with small wall thickness values, the outer-spraying inner-spraying and half-soaking are used for thick-wall pipes (steel pipes with the ratio of the outer diameter to the wall thickness of less than 20) which are difficult to quench completely, so that the steel pipes begin to be quenched in a half-soaking mode after the steel pipes begin to be quenched in the outer-spraying inner-spraying mode in a short time, and then the outer-spraying inner-spraying and half-soaking of the steel pipes are quenched simultaneously, and the quenching effect is improved. Because the steel pipe is half-dipped and quenched after the temperature of the steel pipe is reduced during the water dipping and quenching, the cooling efficiency is high and uniform, compared with direct dipping bath or external spraying and internal spraying, the straightness and the ovality of the pipe end of the steel pipe are greatly improved, and the quenching uniformity in the full-length direction of the steel pipe is improved.
In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a cross-sectional view of one embodiment of the present invention;
fig. 2 is a schematic structural view of an embodiment of the steel pipe rotating device.
In the figure:
description of reference numerals:
1. a quenching tank; 2. a liquid level detection device; 3. a steel pipe rotating device; 4. rotating the support wheel; 5. a material poking device; 6. a pressing device; 7. an external spraying and internal spraying system; 8. a feeding device; 9. a hook; 10. a water level adjusting plate; 11. a water level adjusting device; 12. the hydraulic cylinder, 13, a water charging system, 14 and a motor; 15. a double output shaft speed reducer; 16. a drive shaft; 17. a coupling; 18. a lead screw; 19. a cross bar; 20. a platform; 21. a support; 22. a supporting seat; 23. a guide plate; 24. blanking inclined table; 25. pressing claws; 26. and (7) connecting the shafts.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Example 1:
the embodiment provides a combined type steel pipe quenching device, which comprises an external spraying and internal spraying system 7, a steel pipe rotating device 3, a material stirring device 5, a pressing device 6 and a quenching tank 1, wherein a water level adjusting device 11 and a feeding device 8 are arranged on the feeding side of the quenching tank 1, a discharging side of the semi-immersion tank 1 is provided with a discharging inclined table 24, the middle part of the quenching tank 1 is provided with a platform 20, the rotating device 3 and the material stirring device are both arranged on the platform 20, the material stirring device is close to the discharging side and is connected with the discharging inclined table 24, and at least two material stirring devices are respectively arranged at two shaft ends of the rotating device 3;
the pressing device 6 is arranged above the steel pipe rotating device 3, a steel pipe is arranged between the steel pipe rotating device 3 and the pressing device 6, and the quenching tank 1 is used for being matched with the external spraying and internal spraying system 7 to quench the steel pipe.
The working process is as follows: an applicable quenching process is selected according to the size specification of the steel pipe, the steel pipe with smaller wall thickness value is quenched by the external spraying and internal spraying system 7, and the thick-wall pipe steel pipe with the ratio of the outer diameter to the wall thickness of less than 20 is quenched by the external spraying and internal spraying system 7 and the quenching tank 1.
Quenching process of the external spraying and internal spraying system 7:
firstly, the water level height of the quenching tank 1 is adjusted to be below 15cm from the lowest point of the position of the steel pipe on the steel pipe rotating device 3 through the water level adjusting device 11, then the heated steel pipe is placed on the steel pipe rotating device 3 through the feeding device 8, the steel pipe slowly rotates along with the steel pipe rotating device 3, the rotating speed is not more than 50r/min, then the pressing device 6 presses the rotating steel pipe under the action of the oil cylinder, the steel pipe starts to rotate at high speed, the rotating speed is more than 80 r/min, the outer spraying and inner spraying system 7 uniformly sprays water to the outer wall and the inner wall of the steel pipe to quench the steel pipe until the quenching time is reached, the outer spraying and inner spraying system 7 stops supplying water, in the process, because the water level is 15cm below the quenching station of the steel pipe, the outer water spray and the inner water spray directly overflow from the top of the water level adjusting device 11 after entering the quenching tank 1, the steel pipe cannot be immersed in the water of the quenching tank 1, and the requirements of the quenching process of the outer water spray and the inner water spray are ensured. After quenching is finished, the pressing device 6 loosens the steel pipe, and the steel pipe is pulled out of the quenching station through the pulling device 5. The steel pipe falls to the cushion table from the blanking inclined table 24 and the next process is carried out.
The quenching process is carried out by matching the quenching tank 1 with the external spraying and internal spraying system 7:
firstly, according to the size of a steel pipe, the water level height of a quenching tank 1 is adjusted to be flush with the center of the steel pipe through a position adjusting device, so that about half of the steel pipe is immersed in water in the quenching tank 1 in the radial direction during semi-immersion; then the heated steel pipe is placed on the steel pipe rotating device 3 through the feeding device 8, the steel pipe slowly rotates along with the steel pipe rotating device 3, the rotating speed is not more than 50r/min, then the pressing device 6 presses the rotating steel pipe under the action of the oil cylinder, the steel pipe starts to rotate at high speed, the rotating speed is more than 80 r/min, the external spraying and internal spraying system 7 uniformly sprays water to the outer wall and the inner wall of the steel pipe to quench the steel pipe, because the water sprayed outside and sprayed inside continuously enters the quenching tank 1, the water level in the quenching tank 1 rises to a set height, at the moment, the spraying quenching inside and outside and the semi-immersion quenching are simultaneously carried out until the quenching time is reached, the spraying system 7 stops supplying water, in the process, the external water spraying and the internal water spraying enter the quenching tank 1 and then directly overflow from the top of the water level adjusting device 11, so that the height of the steel pipe immersed in the quenching tank 1 is not changed, and the requirement of the quenching process is ensured.
The composite steel pipe quenching equipment provided by the embodiment can meet the requirements of different quenching processes. The external spraying and internal spraying system 7 is used for uniformly spraying water to the outer wall and the inner wall of the steel pipe to quench the steel pipe, and is suitable for the steel pipe with smaller wall thickness value; the quenching tank 1 is matched with the external spraying and internal spraying system 7, so that the steel pipe can start to be subjected to semi-immersion quenching after a short time from the beginning of spraying and quenching in the external spraying and internal spraying, and then the steel pipe is subjected to quenching simultaneously in the internal spraying and semi-immersion mode and is used for thick-wall pipes which are difficult to be fully quenched.
Example 2:
on the basis of embodiment 1, this embodiment provides a combined type steel pipe quenching equipment, feed arrangement 8 includes support and lifting hook 9, be equipped with the rack on the horizontal pole 19 of support, it is vice to be connected with screw nut on the lifting hook 9, the top of lifting hook 9 links firmly with the vice nut of screw nut, 18 upper portions of the vice lead screw of screw nut are equipped with the gear, gear and rack toothing. As shown in fig. 1.
The motor 14 drives the lead screw 18 to rotate, so that the nut drives the lifting hook 9 to move up and down along the lead screw 18. Firstly, the lifting hook 9 moves upwards to lift the heated steel pipe, then the gear motor 14 rotates to enable the gear to move to the position above the steel pipe rotating device 3 along the rack, then the lifting hook 9 moves downwards to lightly place the steel pipe on the steel pipe rotating device 3, and finally the lifting hook 9 returns to the original position (feeding position) along the rack.
Compared with the feeding inclined table adopted in the existing quenching equipment, the feeding inclined table can be used for lightly taking and lightly placing the hot steel pipe in the feeding process through the gear rack transmission mechanism and the spiral lifting transmission mechanism, and the impact on the steel pipe in the feeding process is avoided.
Example 3:
on the basis of embodiment 1, this embodiment provides a combined type steel pipe quenching equipment, steel pipe rotary device 3 includes motor 14, two output shaft speed reducer 15, transmission shaft 16, shaft coupling 17 and rotatory supporting wheel 4, motor 14 is connected with two output shaft speed reducer 15, transmission shaft 16 is the multistage, two output shafts and transmission shaft 16 of two output shaft speed reducer 15 are connected, are provided with shaft coupling 17 between two adjacent sections of transmission shafts 16, rotatory supporting wheel 4 is installed on transmission shaft 16 (as shown in fig. 2), rotary device locates on support 21, support 21 locates on the platform 20 in quenching groove.
The rotating device is driven by the motor 14, the rotating accuracy of the rotating device is high compared with that of a supporting wheel in the existing chain transmission scheme, and the equipment maintenance workload is small.
Example 4:
on the basis of embodiment 1, the embodiment provides a combined type steel pipe quenching device, wherein the water level adjusting device 11 comprises a water level adjusting plate 10 and a hydraulic oil cylinder 12, the water level adjusting plate 10 is connected with the movable end of the hydraulic oil cylinder 12, and a displacement sensor is arranged on the hydraulic oil cylinder 12;
one side of the quenching tank 1 is provided with an opening and a guide plate 23, the water level adjusting plate is arranged at the opening, the guide plate 23 is provided with a guide groove, and the side edge of the water level adjusting plate 10 is arranged in the guide groove.
According to different quenching process requirements, the water level adjusting plate 10 is pushed to move up and down by oil inlet and return of the hydraulic oil cylinder 12, and the height of the water level adjusting plate 10 is adjusted to a required height. For the outer-spraying inner-spraying quenching and semi-immersion quenching process, the height of the water level adjusting plate 10 is adjusted to be flush with the center of the steel pipe, so that about half of the steel pipe is radially immersed in water during semi-immersion, and the purpose of semi-immersion quenching of the steel pipe is achieved. Wherein, the guide way is used for leading water level regulating plate 10 from top to bottom, and the displacement sensor who is equipped with on hydraulic cylinder 12 can accurate control the water level in the basin when the steel pipe quenches.
The water level adjusting plate 10 can make the inner water spray and the outer water spray entering the quenching tank 1 overflow after reaching the height of the water level adjusting plate 10, thereby ensuring the stable quenching water level.
Example 5:
on the basis of embodiment 1, this embodiment provides a combined type steel pipe quenching equipment, dial material device 5 includes to dial material hook, supporting seat 22 and dial the material motor, dial the material hook and locate on supporting seat 22, supporting seat 22 locates on the platform 20 of quenching groove 1.
As shown in fig. 1, before the steel pipe is placed in the steel pipe rotating device 3, the material stirring motor rotates forward to drive the material stirring hook to rotate to one side of the rotating device, so that the material stirring hook is located below the quenching station, after the steel pipe is quenched, the material stirring motor rotates reversely, so that the material stirring hook rotates to the other side, and the steel pipe is stirred to leave the steel pipe rotating device 3.
Example 6:
on the basis of embodiment 1, this embodiment provides a combined steel pipe quenching apparatus, where the external spray internal spray system 7 includes a plurality of external spray nozzles and a plurality of internal spray nozzles, the external spray nozzles are uniformly arranged along the axial direction of the steel pipe, and the internal spray nozzles are opposite to one end of the steel pipe;
the pressing device 6 comprises a pressing claw 25, a connecting shaft 26 and an oil cylinder, and the pressing claw 25 is connected with the oil cylinder through the connecting shaft 26. The oil cylinder acts, and the pressing claw is driven by the connecting shaft to press the steel pipe on the steel pipe rotating device 3, so that the steel pipe can rotate better.
After the pressing device 6 presses the steel pipe tightly, the inner spraying nozzle and the outer spraying nozzle respectively spray water uniformly to the inner wall and the outer wall of the steel pipe to quench the steel pipe, the inner spraying water enters from one end of the steel pipe, and the other end of the steel pipe flows out.
Example 7:
on the basis of embodiment 1, this embodiment provides a combined type steel pipe quenching equipment, still includes water charging system 13, water charging system 13 and quenching groove 1 intercommunication.
When the steel pipe with large wall thickness is subjected to the processes of outer-spraying inner-spraying quenching and semi-dipping quenching, semi-dipping quenching is required to be carried out in 4S after the outer-spraying inner-spraying quenching, so that for some steel pipes with extremely large thickness, water sprayed in the 4S inside and outside-spraying inner-spraying process cannot meet the water level requirement of the semi-dipping quenching, and water needs to be supplemented by a water supplementing system 13.
Example 8:
on the basis of embodiment 1, the embodiment provides a combined type steel pipe quenching device, and a liquid level detection device 2 is arranged in a quenching tank 1.
The displacement sensor on the hydraulic oil cylinder 12 aims at accurately controlling the water level in the quenching tank 1 during steel pipe quenching, but the displacement sensor can generate deviation after being used for a period of time, so that the liquid level detection device 2 is arranged to correct the numerical value of the displacement sensor, and the requirement of the quenching water level is ensured.
Example 9:
the embodiment provides a composite steel pipe quenching method, which comprises the following steps:
step 1) according to a quenching process of a steel pipe, adjusting a water level adjusting plate 10 of a water level adjusting device 11 to a water level height required by quenching of a quenching tank 1, wherein the water level is 5-10cm lower than the lowest point of the position of the steel pipe on a steel pipe rotating device 3; the purpose is to avoid the steel pipe from contacting water before quenching begins;
lifting the heated steel pipe by a lifting hook 9, moving the steel pipe to a position right above the steel pipe rotating device 3 through a rack and a gear, then lowering the lifting hook 9, placing the steel pipe on the rotating steel pipe rotating device 3, and rotating the steel pipe at a rotating speed not more than 50 r/min;
step 3), pressing the pressing device 6 on the rotating steel pipe, increasing the rotating speed of the steel pipe rotating device 3 to enable the steel pipe to rotate at the rotating speed of 80-120r/min, and then quenching the steel pipe through the external spraying and internal spraying system 7 or the external spraying and internal spraying system 7 and the quenching tank 1;
and 4) stopping water supply of the external spraying and internal spraying system 7 after the steel pipe is quenched, loosening the steel pipe by the pressing device 6, and pulling the steel pipe out of a quenching station by rotating the material pulling device 5 to finish quenching of the steel pipe.
The invention can realize at least two quenching processes of the steel pipe: the quenching requirements of steel pipes with different specifications can be met by external spraying and internal spraying, external spraying and internal spraying and half-soaking. The outer-spraying inner-spraying is suitable for steel pipes with small wall thickness values, the outer-spraying inner-spraying and half-soaking are used for thick-wall pipes (steel pipes with the ratio of the outer diameter to the wall thickness of less than 20) which are difficult to quench completely, so that the steel pipes begin to be quenched in a half-soaking mode after the steel pipes begin to be quenched in the outer-spraying inner-spraying mode in a short time, and then the outer-spraying inner-spraying and half-soaking of the steel pipes are quenched simultaneously, and the quenching effect is improved. As the water level rises during immersion quenching, the cooling process is uniform, the temperature of the steel pipe is rapidly reduced, and half immersion quenching is carried out after the temperature of the steel pipe is reduced, compared with direct immersion bath or external spraying and internal spraying, the straightness and the ovality of the pipe end of the steel pipe are greatly improved, and the quenching uniformity in the full length direction of the steel pipe is improved. Wherein 1/3-1/2 of the steel pipe is immersed in water in the radial direction during the half-immersion quenching.
For steel pipes that do not bend during full immersion quenching, the water level in the quenching tank 1 can be adjusted to a height at which the steel pipes are fully immersed by the water level adjusting plate 10 of the water level adjusting device 11.
Compared with patent CN201276583Y, the method has the following differences: 1. before quenching is started, the steel pipe rotates along with the steel pipe rotating device 3 all the time, so that the steel pipe is cooled uniformly, and bending before quenching is avoided; 2. the feeding device 8 can realize light taking and light placing of the hot steel pipe in the feeding process through the gear rack transmission mechanism and the spiral lifting transmission mechanism, so that the impact on the steel pipe in the feeding process is avoided; 3. the quenching process of at least two steel pipes can be realized, the defects of the existing various quenching processes are overcome, and the quenching requirements of the steel pipes with various specifications can be met through the liquid level adjusting device.
Example 10:
the embodiment provides a composite steel pipe quenching method, which comprises the following steps:
step 1) adjusting a water level adjusting plate 10 to a required highest position according to the requirements of different types and specifications of steel pipe quenching processes, so as to meet the requirements of different quenching processes; taking spray-in spraying and semi-dipping as an example, the water level is adjusted to be at the position flush with the center of the steel pipe, so that the steel pipe is immersed in water in the quenching tank 1 from 1/3 to 1/2 in the radial direction during the semi-dipping;
lifting the heated steel pipe in the step 2) by the lifting type lifting hook 9, then horizontally moving the steel pipe to the position right above the rotary supporting wheel 4 through the rack-and-pinion type guide rail, lowering the lifting type lifting hook 9 to slightly place the steel pipe on the rotary supporting wheel 44, and returning the lifting type lifting hook 9 to the original position;
step 3) the steel pipe rotates slowly (not more than 50 r/min) on the rotating supporting wheel 4 of the rotating device (the rotating supporting wheel 4 of the steel pipe rotating device 3 rotates slowly before);
and 4) pressing the pressing device 6 onto the rotating steel pipe under the action of the oil cylinder, starting the steel pipe to rotate at a high speed (80-120 r/min), uniformly spraying water to the outer wall and the inner wall of the steel pipe by the external spraying and internal spraying system 7 to quench the steel pipe, and continuously feeding water in the external spraying water system, the internal spraying water system and the water replenishing system 13 into the quenching tank 1 to raise the water level in the quenching tank 1 to a set height so as to quench the steel pipe by different processes.
And 5) stopping water supply of the external spraying and internal spraying system 7 after the steel pipe is quenched, closing the water replenishing system 13, loosening the steel pipe by the pressing device 6, and pulling the steel pipe out of the quenching station by rotating the material pulling hook to finish the current quenching process of the steel pipe.
After the steel pipe is pulled out of the quenching station, the water level adjusting plate 10 is lowered to 5-10cm below the lowest point of the steel pipe at the quenching station, so that the next steel pipe is ensured not to be immersed in water on the rotary supporting wheel 44 before the quenching process is started.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. A combined type steel pipe quenching equipment is characterized in that: the device comprises an external spraying and internal spraying system (7), a steel pipe rotating device (3), a material stirring device (5), a pressing device (6) and a quenching tank (1), wherein a water level adjusting device (11) and a feeding device (8) are arranged on the feeding side of the quenching tank (1), a blanking sloping platform (24) is arranged on the discharging side of the semi-immersion tank (1), a platform (20) is arranged in the middle of the quenching tank (1), the rotating device (3) and the material stirring device are both arranged on the platform (20), the material stirring device is close to the discharging side and is connected with the blanking sloping platform (24), and at least two material stirring devices are respectively arranged at two shaft ends of the rotating device (3);
the steel pipe quenching device is characterized in that the pressing device (6) is arranged above the steel pipe rotating device (3), a steel pipe is arranged between the steel pipe rotating device (3) and the pressing device (6), and the quenching tank (1) is used for being matched with the external spraying and internal spraying system (7) to quench the steel pipe.
2. The composite steel pipe quenching apparatus as claimed in claim 1, wherein: feed arrangement (8) are including support and lifting hook (9), be equipped with the rack on horizontal pole (19) of support, it is vice to be connected with screw nut on lifting hook (9), lifting hook (9) top links firmly with the vice nut of screw nut, screw (18) upper portion that screw nut is vice is equipped with the gear, gear and rack toothing.
3. The composite steel pipe quenching apparatus as claimed in claim 1, wherein: steel pipe rotary device (3) include motor (14), two play axle speed reducer (15), transmission shaft (16), shaft coupling (17) and rotatory supporting wheel (4), motor (14) are connected with two play axle speed reducer (15), transmission shaft (16) are the multistage, two output shafts and transmission shaft (16) of two play axle speed reducer (15) are connected, are provided with shaft coupling (17) between two sections adjacent transmission shafts (16), install on transmission shaft (16) rotatory supporting wheel (4), rotary device (3) are located on support (21), support (21) are located on platform (20) of quenching groove (1).
4. The composite steel pipe quenching apparatus as claimed in claim 1, wherein: the water level adjusting device (11) comprises a water level adjusting plate (10) and a hydraulic oil cylinder (12), the water level adjusting plate (10) is connected with the movable end of the hydraulic oil cylinder (12), and a displacement sensor is arranged on the hydraulic oil cylinder (12);
the quenching device is characterized in that one side of the quenching tank (1) is provided with an opening and a guide plate (23), the water level adjusting plate (10) is arranged at the opening, the guide plate (23) is provided with a guide groove, and the side edge of the water level adjusting plate (10) is arranged in the guide groove.
5. The composite steel pipe quenching apparatus as claimed in claim 1, wherein: the material stirring device (5) comprises a material stirring hook, a supporting seat (22) and a material stirring motor, wherein the material stirring hook is arranged on the supporting seat (22), and the supporting seat (22) is arranged on a platform (20) of the quenching tank (1).
6. The composite steel pipe quenching apparatus as claimed in claim 1, wherein: the external spraying and internal spraying system (7) comprises a plurality of external spraying nozzles and a plurality of internal spraying nozzles, the external spraying nozzles are uniformly arranged along the axial direction of the steel pipe, and the internal spraying nozzles are opposite to one end of the steel pipe;
the pressing device (6) comprises a pressing claw (25), a connecting shaft (26) and an oil cylinder, and the pressing claw (25) is connected with the oil cylinder through the connecting shaft (26).
7. The composite steel pipe quenching apparatus as claimed in claim 1, wherein: the quenching device is characterized by further comprising a water replenishing system (13), wherein the water replenishing system (13) is communicated with the quenching tank (1).
8. The composite steel pipe quenching apparatus as claimed in claim 1, wherein: and a liquid level detection device (2) is arranged in the quenching tank (1).
9. A composite steel pipe quenching method, which adopts the composite steel pipe quenching equipment of claim 2, is characterized by comprising the following steps:
step 1) according to a quenching process of a steel pipe, adjusting a water level adjusting plate (10) of a water level adjusting device (11) to a water level height required by quenching of a quenching tank (1), wherein the water level is 5-10cm lower than the lowest point of the position of the steel pipe on a steel pipe rotating device (3);
lifting the heated steel pipe by a lifting hook (9), moving the steel pipe to the position right above the steel pipe rotating device (3) through a rack and a gear, then descending the lifting hook (9), placing the steel pipe on the rotating steel pipe rotating device (3), and rotating the steel pipe at a rotating speed of not more than 50 r/min;
step 3), pressing the pressing device (6) on the rotating steel pipe, increasing the rotating speed of the steel pipe rotating device (3) to enable the steel pipe to rotate at the rotating speed of 80-120r/min, and then quenching the steel pipe through the external spraying and internal spraying system (7) or the external spraying and internal spraying system (7) and the quenching tank (1);
and 4) stopping water supply of the external spraying and internal spraying system (7) after the steel pipe is quenched, loosening the steel pipe by the pressing device (6), and pulling the steel pipe out of a quenching station by the rotation of the material pulling device (5) to finish quenching of the steel pipe.
10. The method of claim 9, wherein the quenching step comprises: the quenching process at least comprises two types of external spraying and internal spraying, external spraying and internal spraying and semi-soaking.
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| CN202010269677.0A CN111424155A (en) | 2020-04-08 | 2020-04-08 | Combined type steel pipe quenching equipment and method |
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