CN218108857U - Hot rolling equipment for repairing and remanufacturing waste oil well pipe - Google Patents

Abstract

The utility model belongs to hot rolling seamless steel pipe production field especially relates to a hot rolling equipment for old and useless oil well pipe is restoreed and is reformed transform, this equipment can be with the geometry (external diameter and wall thickness) that old and useless oil well pipe partly restores national standard, another part is through reducing the footpath, increase the wall or reduce the wall production and reform transform into some civilian steel pipes, for example building coil buckle pipe, reinforcing bar connects hoop pipe, shock tube etc. this equipment mainly includes into stirring mechanism, upsetting apparatus, intermediate frequency heating device, stirring mechanism after the upset, two roller mill devices, sizing mill mechanism, step-by-step cold bed, the straightener, material collecting device etc.. An object of the utility model is to provide a production flow is short, production efficiency is high, makes the old and useless oil well pipe restore the back partly and is used for the oil field to use, and partly can change into the hot rolling of civilian pipe and equip.

Description

Hot rolling equipment for repairing and remanufacturing waste oil well pipe

Technical Field

The utility model belongs to hot rolling seamless steel pipe production field especially relates to a hot rolling is equipped for old and useless oil well pipe is restoreed and is reformed transform.

Background

The oil pipes used in oil wells in domestic oil fields are greatly scrapped due to eccentric wear and corrosion every year, and only a part of the oil pipes can be selected from waste oil pipes and used after simple repair in order to save production cost. According to statistics, the quantity of the waste oil pipes which can not be recycled and are generated in domestic oil fields reaches 200 ten thousand tons every year. How to make the old and useless oil line that the wall thickness can not reach the operation standard use up to standard again, perhaps reach and satisfy some and need not bear the pressure and go into the well, and reuse as water pipe or trachea, perhaps change into civilian steel pipe again, not only the thing of lowering the cost, also accord with green's theory. In addition, some cold drawing (cold rolling) processes in the traditional process are adopted in China at present, the processes of heading, pickling, annealing and the like of a cold drawing machine are needed, the whole production process is long, the production cost is high, and pickling pollution exists; in addition, some three-roller or two-roller hot rolling processes are adopted, the three-roller skew rolling process is used for producing small-caliber thin-wall seamless pipes, the pierced capillary pipes are thin due to small wall reduction amount and low temperature, metallographic structure rolling cracks are easy to occur, the production quality of the seamless steel pipes can be seriously influenced, and the processes can only be used for reducing the diameter or performing equal-diameter rolling to produce some civil or modified pipes, so that the integral utilization rate of the waste oil well pipes cannot be solved.

Disclosure of Invention

The utility model provides a pair of be used for old and useless oil well pipe to restore new technology of hot rolling that changes heat and equip the weak point that prior art was overcome to aim at, provide a production flow and short, production efficiency is high, makes old and useless oil well pipe repair back partly can be used to the oil field and reuses, and partly production technology and hot rolling technical equipment that can change into civilian pipe. The production process and the technical equipment can restore one part of the waste oil well pipe to the national standard geometric dimension (outer diameter and wall thickness), and reform the other part of the waste oil well pipe into some civil steel pipes through reducing, wall increasing or wall reducing production, such as building coil pipes, reinforcing steel bar hoop pipes, shock absorption pipes and the like.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a hot rolling device for repairing and remanufacturing a waste oil well pipe comprises a feeding and turning mechanism, a upsetting device, a medium-frequency heating device, a upsetting and turning mechanism, a two-roller mill device, a sizing mill mechanism, a stepping cooling bed, a straightening machine and a material receiving device, wherein the upsetting device comprises a front working frame and a forming working frame which are connected and maintained through a core rod and core rod assembly; the inner side of a front table working rack is provided with a fixed rack, a propelling trolley capable of propelling a core rod, the propelling trolley is provided with a driving feeding double gear and a motor driving speed reducer, the gear and the rack can be driven to be occluded to drive the core rod and a pipe, the middle of the front table working rack is provided with a medium-frequency heating device, the rear end of the medium-frequency heating device is a forming working rack, the front end of the forming working rack is provided with a limiting beam, one side of the limiting beam is provided with a limiting steel pipe die, and the other side of the limiting beam is provided with 1-2 hydraulic limiting oil cylinders for limiting upsetting; the tail part of the forming working frame is provided with a mandrel trolley device, a driving motor and a connecting speed reducer which are driven by transmission chains or steel ropes on two sides, and the middles of the front working frame and the forming working frame are provided with riding wheel devices which can receive upsetting rolled pipes; and an upsetting and turning mechanism is arranged on the side surface of the forming working machine frame.

Furthermore, the two-roller mill device comprises a front platform and a rear platform, wherein the front end of the front platform is provided with a front-stage precession mechanism of the rolling mill, the front-stage precession mechanism of the rolling mill is connected with the two-roller mill through a medium-frequency heating device, and the rear stage of the two-roller mill is provided with a main transmission motor with adjustable speed, a transmission speed reducer and a transmission shaft for connecting the transmission speed reducer with the two-roller mill; a holding roller frame mechanism for protecting rolling is arranged in the middle of the rear platform, a hydraulic limiting mechanism is arranged behind the holding roller frame mechanism, a mandrel lubricating and spraying device is arranged at the front end of the hydraulic limiting mechanism, and a mandrel trolley mechanism is arranged on the other side of the hydraulic limiting mechanism; the core rod trolley mechanism comprises a working rack, a motor, a speed reducer, a core rod and a core rod trolley, wherein the core rod and the core rod are connected with the core rod trolley, and the core rod trolley is connected with the speed reducer through a chain or a steel wire rope; and the rolling mill foreground precession mechanism of the two-roller rolling mill device is connected with the upsetting device through an upsetting rear upender.

Furthermore, the sizing mill mechanism is arranged in a linear mode and sequentially comprises a sizing front feeding mechanism, a medium-frequency heating device, a sizing mill unit and a sizing rear discharging and turning device, wherein a sizing front turning mechanism is arranged on one side of the sizing front feeding mechanism, and the sizing front turning mechanism is arranged on one side of a roller holding frame mechanism in the two-roller mill; the sizing mill unit is a micro-tension reducing or sizing mill unit, and can be a sizing mill with a 3-5 machine frame or a sizing mill with a 7-16 machine frame.

Furthermore, the sizing back discharging and turning device in the sizing mill frame is connected with the stepping cooling bed through the turning device, the number of the stepping cooling bed is two, the straightening machine is arranged between the two groups of the stepping cooling bed, and the material receiving device is arranged on one side of the stepping cooling bed.

The utility model discloses a superior effect is:

1. the utility model provides a be used for old and useless oil well pipe to restore and reform transform hot rolling and equip, adopt this technique to equip the rolling old and useless oil well pipe that reaches repeatedly usable's standard, energy saving and consumption reduction, improvement resource utilization rate.

2. The utility model discloses an upsetting device who adopts among the technical scheme carries out spacing wall thickness bodiness with wearing and tearing serious old and useless oil pipe before rolling, solves the wall thickness defect that the pipe eccentric wear caused, guarantees that the capillary rolling in the next skew rolling flow can go on smoothly, adopts two roller skew rolling mills to solve the problem that the metallographic structure ftractures appears easily in the rolling thin wall oil well pipe in-process, improves product quality.

3. The utility model discloses an adopt the rolling process flow of "upsetting and rolling + two roller skew rolling + sizing", can restore the old and useless oil well pipe and reuse, can change some old and useless oil well pipes into some civilian pipes again, reduce the wasting of resources, improve the comprehensive utilization ratio of old and useless oil well pipe.

To sum up, the utility model provides a pair of a hot rolling equipment for old and useless oil well pipe is restoreed and is reformed transform is equipped with new technology and equipment, replaces original production and pollutes the technology that big, the energy consumption is high, the success rate is low, whole technology with equip production efficiency height, the success rate is high, the quality is excellent, the product coverage is wide, makes the comprehensive utilization of old and useless oil well pipe promote, accords with the green direction of developing of the industry that the country advocated.

Drawings

FIG. 1 is a plan view of a hot rolling equipment for repairing and remanufacturing a waste oil well pipe according to the present invention;

FIG. 2 is a schematic view of the upsetting apparatus of the present invention;

FIG. 3 is a schematic structural view of a two-high rolling mill apparatus of the present invention;

FIG. 3-1 is a schematic structural view of a front stage precession mechanism of the rolling mill of the present invention;

3-2 is a schematic structural view of a two-high rolling mill in the present invention;

fig. 3-3 is a schematic view of the structure layout of the holding roller frame mechanism and its surroundings;

fig. 3-4 are schematic structural views of the mandrel trolley mechanism of the present invention;

FIG. 4 is a schematic structural view of a sizing mill mechanism according to the present invention;

FIG. 5 is a schematic structural view of the step-by-step cooling bed, the straightening machine and the material receiving device of the present invention.

Reference numerals: 1. a feeding and turning mechanism; 2. an upsetting device; 3. a medium-frequency heating device 4 and a stirring device after upsetting; 5. a rolling mill foreground precession mechanism; 6. a two-high mill; 7. a transmission speed reducer; 8. a main drive motor; 9. a drive shaft; 10. a roll holding frame; 11. a hydraulic stopper mechanism; 12. a mandrel trolley mechanism; 13. a sizing front stirring mechanism; 14. a pre-sizing feed mechanism; 15. a sizing mill unit; 16. a discharging and turning device after sizing; 17. a step-by-step cooling bed; 18. a straightening machine; 19. a material receiving device; 21. a front desk working machine frame; 22. propelling the trolley; 23. feeding the double gears; 24. a motor-driven reduction gear; 25. forming a working frame; 26. a core rod assembly; 27. a riding wheel; 28. a hydraulic limiting oil cylinder; 209. limiting the cross beam; 210. limiting the steel pipe mould; 211. a drive motor; 212. connecting a speed reducer; 213. a drive chain or wire rope; 214. a mandrel trolley device.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the invention, its application, or uses. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.

As used in this application, the word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility of covering other elements as well. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

A hot rolling device for repairing and remanufacturing a waste oil well pipe adopts the following process flow:

s1: classifying and processing, namely primarily selecting the waste oil pipes through a platform, classifying the waste oil pipes with relatively low eccentric wear degree as the capillary pipes for repairing and reusing, classifying the waste oil pipes with pits on the inner and outer surfaces as the capillary pipes for modifying the civil pipe, and mechanically removing couplings of the two types of waste oil pipes to prepare the next process; finally, the waste oil pipe with the eccentric wear degree more than 2.5mm is treated as waste iron;

s2: heating, processing impurities on the inner surface and the outer surface of the waste oil pipe, heating the selected waste oil pipe in a heating furnace at the heating temperature of 750-850 ℃, burning oil stains and impurities on the inner surface and the outer surface of the waste oil pipe, solving the problem of waste gas generated by burning through desulfurization, denitrification, spraying and cloth bag dust removal environmental protection equipment, conveying the waste oil pipe to a material turning front table of a stepping cooling bed 17 through an output roller way, arranging a high-pressure air soot blower at the head of the material turning front table, conveying the waste oil pipe to the position, blowing soot the inner surface of the waste oil pipe for 3-6 seconds through high-pressure air, collecting blown impurities by a dust collecting device arranged at the position corresponding to the high-pressure air soot blower, turning the waste oil pipe to the stepping cooling bed 17 through the material turning device to cool the waste oil pipe to a natural temperature state, designing a high-power cooling fan at one side of the stepping cooling bed 17, blowing off the impurities on the surface of the pipe while cooling, and naturally straightening the pipe in cooling by adopting the stepping cooling bed 14.

S3: secondary selection, wherein the pipe subjected to impurity heating treatment is secondarily selected when passing through a selection platform, and the pipe is classified in the S1 again;

s4: the pipe is heated, upset, expanded and rolled, the pipe classified as restoration and reuse is heated by an upsetting device 2, the pipe with the inner core rod is heated by a medium-frequency heating device 3, a hydraulic limiting steel pipe die 209 is arranged outside the pipe for upsetting and expanding, the outer diameter of the pipe is expanded, and the wall thickness is increased;

s5: heating and rolling, wherein intermediate frequency heating or heating furnace heating can be carried out, the pipe is heated to 950-1050 ℃, the mandrel penetrates into the rolling mill from the back of the rolling mill, the heated pipe enters two rolling mill devices of YM-80 series through a screw-in mechanism 5 at the front of the rolling mill, and the pipe is subjected to reducing, wall reducing and expanding rolling through two rolling mills 6;

s6: reheating, sizing and shaping, namely performing heat supplementing on the rolled pipe to 850-950 ℃ through intermediate frequency heating, and performing reducing, sizing and shaping through a micro-tension reducing or sizing unit to form a hot finished pipe; wherein, the rolling repair of the oil pipe only needs to start a sizing mill with a 3-5 frames, and the remanufacturing of the civil pipe needs to start a sizing mill with a 7-16 frames;

s7: cooling, namely cooling the hot finished product pipe by a stepping cooling bed 17;

s8: and collecting finished products, straightening the cooled finished pipes through a straightening machine 18, cutting ends, inspecting, packaging, marking and warehousing to form the finished pipes.

Preferably, in the step S4, when the diameter of the pipe is expanded by using an upsetting device, the outer diameter of the pipe is expanded by 3-5mm, and the wall thickness is increased by 1-2mm.

Preferably, when the pipe is subjected to reducing, diameter reducing, wall reducing and diameter expanding rolling by the two-roll mill in S5, the wall reducing amount is 0.5mm-2mm, the reducing amount is 3mm-5mm, and the diameter expanding amount is 4mm-6mm.

Referring to fig. 1-5, a hot rolling device for repairing and remanufacturing a waste oil well pipe based on the above process flow comprises a material feeding and turning mechanism 1, a upsetting device 2, a medium frequency heating device 3, a material turning mechanism after upsetting, a two-roll mill device, a sizing mill mechanism, a stepping cold bed, a straightener 18 and a material receiving device 19, wherein as shown in fig. 2, the upsetting device 2 comprises a front working frame 21, a forming working frame 25 and a core rod and core rod assembly 26 which plays a role of holding between the two frames; the inner side of a foreground working rack 21 is provided with a fixed rack, a propelling trolley 22 capable of propelling a core rod, the propelling trolley 22 is provided with a driven feeding double gear 23 and a motor-driven speed reducing device 24, the driving trolley can drive the meshing of the gear and the rack to drive the core rod and a pipe, the middle of the foreground working rack 21 is provided with a medium-frequency heating device 3 for heating the pipe, the rear end of the medium-frequency heating device 3 is a forming working rack 25, the front end of the forming working rack 25 is provided with a limiting beam 209, one side of the limiting beam 209 is provided with a limiting steel pipe die 210, the other side of the limiting beam 209 is provided with 1-2 hydraulic limiting oil cylinders 28 for limiting upsetting and rolling; the tail part of the forming working frame 25 is provided with a mandrel trolley device 214 driven by a transmission chain or a steel rope 213 at two sides, a driving motor 211 and a connecting speed reducer 212, and the middles of the front working frame 21 and the forming working frame 25 are provided with riding wheel devices 27 which can receive upsetting pipes; the mandrel trolley moves to the position of the hydraulic limiting beam 209 during upsetting and rolling, the mandrel trolley moves along with the upsetting process, the upsetting device 2 is provided with an upsetting and turning device 4 on the side, and after upsetting, the tube can be turned into the two-roll rolling mill 6 to be screwed into the foreground.

As shown in fig. 3, the two-roll mill device comprises a front platform and a rear platform, the two-roll mill 6 is a YM-80 two-roll mill 6 with adjustable rolling angle and feeding angle, the front end of the front platform is provided with a front-stage precession mechanism 5 of the mill, the front-stage precession mechanism 5 of the mill is connected with the two-roll mill 6 through a medium-frequency heating device 3 to perform the functions of upsetting the hollow billet while rotating and feeding and heating, and the rear stage of the two-roll mill 6 is provided with a main transmission motor 8 with adjustable speed, a transmission reducer 7 and an SWC250/BH transmission shaft 9 for connecting the transmission reducer 7 with the two-roll mill 6; a holding roller frame mechanism 10 for protecting rolling is arranged in the middle of the rear platform, a hydraulic limiting mechanism 11 is arranged behind the holding roller frame mechanism 10, a mandrel lubricating and spraying device is arranged at the front end of the hydraulic limiting mechanism 11, a mandrel trolley mechanism 12 is arranged on the other side of the hydraulic limiting mechanism 11, the mandrel trolley mechanism 12 comprises a working rack, a motor, a speed reducer, a mandrel and a mandrel trolley, the mandrel and the mandrel are connected with the mandrel trolley, and the mandrel trolley is connected with the speed reducer through a chain or a steel wire rope; in the step S4, after the blank pipe is upset, the inner hole of the blank pipe is reduced, and the front-stage mandrel cannot be inserted, so that the two-roll mill 6 used in the design scheme preferably adopts a mill back-stage mandrel insertion design.

The rolling mill foreground precession mechanism 5 of the two-roller rolling mill device is connected with the upsetting device 2 through the upsetting rear upender device 4.

As shown in fig. 4, the sizing mechanism is arranged in a linear type, and sequentially comprises a sizing pre-feeding mechanism 14, a medium frequency heating device 3, a sizing mill unit 15, and a sizing post-discharging and turning device 16, wherein a sizing pre-turning mechanism 13 is arranged on one side of the sizing pre-feeding mechanism 14, and the sizing pre-turning mechanism 13 is arranged on one side of the holding frame mechanism 10 in the two-roll mill 6; the sizing mill unit 15 is a micro-tension reducing or sizing mill unit, and can be a sizing mill with a 3-5 machine frame or a sizing mill with a 7-16 machine frame.

As shown in figure 5, the sizing discharging and turning device 16 in the sizing mill frame is connected with the turning device stepping cooling beds 17, the number of the stepping cooling beds 17 is two, a straightener 18 is arranged between the two groups of the stepping cooling beds 17, and a material receiving device 19 is arranged on one side of each stepping cooling bed 17.

Wherein, the arrow in each view is the advancing direction of the pipe in the rolling process.

The utility model provides a pair of old and useless oil well pipe is restoreed new technology of hot rolling of transformation and is equipped aim at and overcome prior art's weak point, and provide a production flow and short, production efficiency is high, makes old and useless oil well pipe restore the back partly and is used for the oil field to use, and partly hot rolling technical equipment that can change into civilian pipe. Through repeated tests and production practices, the production technical equipment can restore the waste oil well pipe to the national standard geometric dimension (outer diameter and wall thickness) and can be reformed into some civil steel pipes such as building coil pipes, steel bar connecting hoop pipes, shock absorption pipes and the like through reducing, wall increasing or wall reducing production.

Thus far, various embodiments of the present invention have been described in detail. Some details which are well known in the art have not been described in order to avoid obscuring the concepts of the present invention. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (4)

1. The utility model provides a hot rolling is equipped for old and useless oil well pipe is restoreed and is reformed transform, includes into upender mechanism (1), upsetting device (2), intermediate frequency heating device (3), upset back upender device (4), two roller mill devices, sizing mill mechanism, step-by-step cold bed (17), straightener (18), material collecting device (19), its characterized in that: the upsetting device (2) comprises a front working rack (21), a forming working rack (25) and a core rod and core rod assembly (26), wherein the front working rack (21) and the forming working rack (25) are connected and maintained through the core rod and core rod assembly (26); the inner side of a foreground working rack (21) is provided with a fixed rack, a propelling trolley (22), the propelling trolley (22) is provided with a driven feeding double gear (23) and a motor-driven speed reducer (24), the middle of the foreground working rack (21) is provided with a medium-frequency heating device (3), the rear end of the medium-frequency heating device (3) is a forming working rack (25), the front end of the forming working rack (25) is provided with a limiting beam (209), one side of the limiting beam (209) is provided with a limiting steel pipe die (210), and the other side of the limiting beam (209) is provided with 1-2 hydraulic limiting oil cylinders (28); the tail part of the forming working rack (25) is provided with a mandrel trolley device (214) driven by transmission chains or steel ropes (213) at two sides, a driving motor (211) and a connecting speed reducer (212), the middles of the front working rack (21) and the forming working rack (25) are provided with riding wheel devices (27), and the side surface of the forming working rack (25) is provided with an upsetting and then material-turning device (4).

2. The hot rolling equipment for repairing and remanufacturing the waste oil well pipe according to claim 1, wherein the hot rolling equipment comprises: the two-roller mill device comprises a front platform and a rear platform, wherein the front end of the front platform is provided with a rolling mill front stage precession mechanism (5), the rolling mill front stage precession mechanism (5) is connected with the two-roller mill (6) through a medium-frequency heating device (3), and the rear stage of the two-roller mill (6) is provided with a main transmission motor (8) capable of adjusting speed, a transmission speed reducer (7) and a transmission shaft (9) for connecting the transmission speed reducer (7) with the two-roller mill (6); a holding roller frame mechanism (10) for protecting rolling is arranged in the middle of the rear platform, a hydraulic limiting mechanism (11) is arranged behind the holding roller frame mechanism (10), a mandrel lubricating and spraying device is arranged at the front end of the hydraulic limiting mechanism (11), and a mandrel trolley mechanism (12) is arranged on the other side of the hydraulic limiting mechanism (11); the core rod trolley mechanism (12) comprises a working rack, a motor, a speed reducer, a core rod and a core rod trolley, wherein the core rod and the core rod are connected with the core rod trolley, and the core rod trolley is connected with the speed reducer through a chain or a steel wire rope; the rolling mill foreground precession mechanism (5) of the two-roller rolling mill device is connected with the upsetting device (2) through the upsetting rear upender device (4).

3. The hot rolling equipment for repairing and remanufacturing the waste oil well pipe according to claim 1, wherein the hot rolling equipment comprises: the sizing mill mechanism is arranged in a linear mode and sequentially comprises a sizing front feeding mechanism (14), a medium-frequency heating device (3), a sizing mill unit (15) and a sizing rear discharging and turning device (16), wherein a sizing front turning mechanism (13) is arranged on one side of the sizing front feeding mechanism (14), and the sizing front turning mechanism (13) is arranged on one side of a roller holding frame mechanism (10) in the two-roller mill (6); the sizing mill unit (15) is a micro-tension reducing or sizing mill unit, and a 3-5 frame sizing mill or a 7-16 frame sizing mill can be selected.

4. The hot rolling equipment for repairing and remanufacturing the waste oil well pipe according to claim 3, wherein the hot rolling equipment comprises: the sizing back discharging and turning device (16) in the sizing mill mechanism is connected with the stepping cooling bed (17) through the turning device, the stepping cooling bed (17) is divided into two groups, a straightening machine (18) is arranged between the two groups of stepping cooling beds (17), and a material receiving device (19) is arranged on one side of the stepping cooling bed (17).

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