CN110607423A - Heat treatment device and method for drill rod for blast furnace opening - Google Patents
Heat treatment device and method for drill rod for blast furnace opening Download PDFInfo
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- CN110607423A CN110607423A CN201911006980.5A CN201911006980A CN110607423A CN 110607423 A CN110607423 A CN 110607423A CN 201911006980 A CN201911006980 A CN 201911006980A CN 110607423 A CN110607423 A CN 110607423A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000006698 induction Effects 0.000 claims abstract description 80
- 230000000171 quenching effect Effects 0.000 claims abstract description 38
- 230000005540 biological transmission Effects 0.000 claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 238000010791 quenching Methods 0.000 claims abstract description 33
- 239000000110 cooling liquid Substances 0.000 claims abstract description 31
- 238000005507 spraying Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 238000001816 cooling Methods 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 16
- 238000005496 tempering Methods 0.000 claims description 13
- 239000002826 coolant Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 5
- 230000001154 acute effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000004904 shortening Methods 0.000 abstract description 3
- 230000033001 locomotion Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- 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
-
- 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
-
- 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
- C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention provides a heat treatment device and a heat treatment method for a drill rod for a blast furnace opening, which belong to the technical field of heat treatment, and comprise the following steps: support frame, transmission device and induction coil. The transmission mechanism is fixedly arranged on the support frame and is used for transmitting the drill rod; the induction coil is fixedly arranged on the support frame and positioned above the transmission mechanism and is used for being connected with induction heating equipment to heat the drill rod on the transmission mechanism; the tail end of the induction coil is provided with a spraying port for spraying cooling liquid for quenching the heated drill rod. The device has simple structure and small occupied space, and can finish the quenching operation of the drill rod on one station, thereby greatly improving the production efficiency and shortening the production period. The heat treatment method for the drill rod for the blast furnace opening shortens the quenching operation time of the drill rod, improves the production efficiency, and can effectively remove the oxide skin on the surface of the drill rod, thereby improving the surface quality of the drill rod.
Description
Technical Field
The invention belongs to the technical field of heat treatment, and particularly relates to a heat treatment device and a heat treatment method for a drill rod for a blast furnace opening.
Background
A drill rod for blast furnace opening belongs to a metallurgical drill tool, when the blast furnace is opened for operation, impact power and torque provided by an opening machine are required to be transmitted to a drill bit through the drill rod, and the drill bit drills an iron notch in a rotary cutting and impact crushing mode.
Because the drill rod is in an alternating load working environment of impact load and torque, bending and fracture become main failure modes of the drill rod for opening the blast furnace, and in addition, because the drill rod and the drill bit are usually in threaded connection, if the thread strength is insufficient, thread failure can be caused, and the drill rod is directly scrapped. Therefore, it is necessary to improve the hardness, strength and toughness of the drill rod for blast furnace opening by heat treatment. Meanwhile, the hardness of the stemming for plugging the taphole is considered to be low, and the stemming does not need to be subjected to integral heat treatment but only needs to be subjected to surface heat treatment. The heat treatment process of the prior drill rod is surface quenching and low-temperature tempering. In the surface quenching process, the heated drill rod needs to be conveyed to a cooling liquid pool from a heating station for cooling treatment, so that the production efficiency is low, the production period is seriously influenced, and meanwhile, the cooling liquid pool needs to occupy a certain space.
Disclosure of Invention
The invention aims to provide a heat treatment device for a drill rod for a blast furnace opening, and aims to solve the problems of low production efficiency and large occupied space of cooling equipment in the existing heat treatment process of the drill rod for the blast furnace opening.
In order to achieve the purpose, the invention adopts the technical scheme that: provided is a heat treatment device for a drill rod for a blast furnace opening, comprising:
a support frame;
the transmission mechanism is fixedly arranged on the support frame and is used for transmitting the drill rod; and
the induction coil is fixedly arranged on the support frame and positioned above the transmission mechanism and is used for being connected with induction heating equipment to heat the drill rod on the transmission mechanism; and the tail end of the induction coil is provided with a spraying port for spraying cooling liquid for quenching the heated drill rod.
As another embodiment of this application, induction coil is hollow structure, induction coil's both ends all are connected with the water service pipe that is used for intaking.
As another embodiment of the present application, the shower openings are uniformly arranged along the inner side wall of the induction coil.
As another embodiment of the present application, the shower opening is disposed at least on one turn of the induction coil.
As another embodiment of the present application, the size of the shower opening is 1/3-1/4 of the radial size of the induction coil.
As another embodiment of the application, a water tank is arranged below the induction coil and used for collecting cooling liquid sprayed out of the spraying port.
As another embodiment of the present application, the transfer mechanism includes:
the driving motor is fixedly arranged on the support frame;
the driving wheel is fixedly connected with an output shaft of the driving motor, the axial direction of the driving wheel is parallel to the length direction of the support frame, and the driving wheel is used for driving the drill rod to rotate around the axial direction of the drill rod; and
the driven wheel is rotatably arranged on the supporting frame; the driven wheels are arranged in an acute angle manner in the axial direction and the horizontal direction, and every two driven wheels which are arranged in a central symmetry manner form a group; and a plurality of groups of driven wheels are arranged side by side along the length direction of the support frame and are used for supporting and driving the drill rod to move along the axial direction of the drill rod.
As another embodiment of the present application, the transfer mechanism further includes:
the sleeve is arranged on the supporting frame;
one end of the supporting column is connected with the sleeve in a sliding mode, and the other end of the supporting column is hinged with the driven wheel; a guide sliding groove matched with the support column is arranged in the sleeve; and
the connecting rod is arranged in the sleeve and has the freedom degree of rotating around the axial direction of the connecting rod; the connecting rod is in threaded connection with the supporting column and used for driving the supporting column to slide in the guide sliding groove.
As another embodiment of this application, the connecting rod is kept away from the one end of support column be equipped with sleeve complex limiting flange, the base is installed to telescopic bottom, the base with limiting flange's terminal surface butt is used for with limiting flange is spacing in the sleeve.
The drill rod heat treatment device for the blast furnace opening has the advantages that: compared with the prior art, the heat treatment device for the drill rod for the blast furnace opening is characterized in that a transmission mechanism and an induction coil are fixedly mounted on a support frame, the transmission mechanism is used for transmitting the drill rod, the induction coil is positioned above the transmission mechanism, the induction coil is used for heating the drill rod on the transmission mechanism, and the heated drill rod is sprayed with cooling liquid for cooling by virtue of a spraying opening formed at the tail end of the induction coil, so that the drill rod is quenched. The device has the advantages of simple structure, small occupied space and low manufacturing cost, and can finish the quenching operation of the drill rod on one station, thereby greatly improving the production efficiency and shortening the production period.
The invention also provides a heat treatment method of the drill rod for the blast furnace opening, which comprises the following steps:
a feeding step, wherein the drill rod to be processed is conveyed to a conveying mechanism through a feeding machine;
a quenching step, in the feeding process of the drill rod to be treated, heating the drill rod to be treated to a quenching temperature by using an induction coil, and spraying cooling liquid to cool the drill rod heated to the quenching temperature by using a spraying port arranged at the tail end of the induction coil;
and a tempering step, namely heating the quenched drill rod to a tempering temperature by using an induction coil, and carrying out air cooling on the drill rod heated to the tempering temperature to obtain the target drill rod.
The heat treatment method of the drill rod for the blast furnace opening, provided by the invention, has the beneficial effects that: compared with the prior art, the heat treatment method for the drill rod for the blast furnace opening realizes the feeding motion of the drill rod to be treated by the aid of the transmission mechanism, heats the drill rod to be treated to the quenching temperature by the aid of the induction coil, and sprays the cooling liquid to the drill rod heated to the quenching temperature by the aid of the spraying port formed at the tail end of the induction coil for cooling, so that the quenching operation time of the drill rod is shortened, the production efficiency is improved, and the scale on the surface of the drill rod can be effectively removed by the aid of the cooling liquid spraying operation of the drill rod, so that the surface quality of the drill rod is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a heat treatment apparatus for a drill rod for a blast furnace opening according to an embodiment of the present invention;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is a schematic view of a portion of a driven wheel set of FIG. 1;
FIG. 4 is a schematic perspective view of a driven wheel used in an embodiment of the present invention;
FIG. 5 is a half sectional view taken along line C in FIG. 4;
fig. 6 is a schematic perspective view of an induction coil according to an embodiment of the present invention.
In the figure: 1. a support frame; 2. a transport mechanism; 201. a drive motor; 202. a driving wheel; 203. a driven wheel; 204. a sleeve; 205. a support pillar; 206. a connecting rod; 208. a limiting flange; 209. a base; 210. locking the nut; 3. an induction coil; 301. a spray port; 302. a water pipe; 4. a water tank; 5. a drill rod.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2 together, a heat treatment apparatus for a drill rod for a blast furnace opening according to the present invention will now be described. In which the direction a in fig. 1 is the feed direction of the drill rod and the direction B in fig. 2 is the rotation direction of the drill rod. The heat treatment device for the drill rod for the blast furnace opening comprises: support frame 1, transmission device 2 and induction coil 3. The transmission mechanism 2 is fixedly arranged on the support frame 1 and is used for transmitting the drill rod 5; the induction coil 3 is fixedly arranged on the support frame 1 and positioned above the transmission mechanism 2, and is used for being connected with induction heating equipment to heat the drill rod 5 on the transmission mechanism 2; the tail end of the induction coil 3 is provided with a spray opening 301 for spraying cooling liquid for quenching the heated drill rod 5.
Compared with the prior art, the heat treatment device for the drill rod for the blast furnace opening is characterized in that a transmission mechanism 2 and an induction coil 3 are fixedly arranged on a support frame 1, the transmission mechanism 2 is used for transmitting the drill rod 5, the induction coil 3 is positioned above the transmission mechanism 2, the induction coil 3 is used for heating the drill rod 5 on the transmission mechanism 2, and the heated drill rod 5 is sprayed with cooling liquid for cooling by virtue of a spraying port 301 formed in the tail end of the induction coil 3, so that the quenching treatment of the drill rod 5 is realized. The device has the advantages of simple structure, small occupied space and low manufacturing cost, and can finish the quenching operation of the drill rod 5 on one station, thereby greatly improving the production efficiency and shortening the production period.
In this embodiment, the induction coil 3 is located on the motion path of the drill rod 5, and the transmission mechanism 2 drives the drill rod 5 to pass through the induction coil 3, so that the induction coil 3 heats the periphery of the drill rod 5 simultaneously, the heating is more uniform, and the heating efficiency is higher. The end of induction coil 3 is the cooling zone, and the cooling zone is located the end of the predetermined transmission direction of drill rod 5, has seted up on induction coil 3 in the cooling zone and has sprayed mouthful 301, and the coolant liquid is followed and is sprayed to the surface of drill rod 5 in mouthful 301 department of spraying, carries out the water quenching cooling to drill rod 5 after the heating. The cooling liquid can be water, oil or other liquid capable of achieving a cooling effect. The transmission mechanism 2 comprises a driving motor 201 and a plurality of driving wheels, the driving wheels are arranged side by side to form a transmission channel, the drill rod 5 is placed on the transmission channel, and the driving motor 201 drives the driving wheels to rotate so as to drive the drill rod 5 to move along the transmission direction.
Referring to fig. 6, an induction coil 3 has a hollow structure, and both ends of the induction coil 3 are connected to a water pipe 302 for supplying water. In this embodiment, induction coil 3 adopts hollow structure, and the coolant liquid gets into hollow structure, spouts from the mouth 301 department that sprays that induction coil 3 seted up again, and this structural design is reasonable, has improved the utilization ratio in space, and the coolant liquid way does not influence each other with induction coil 3's heating function. The cooling liquid is injected into the hollow structure from the water service pipes 302 at the two ends of the induction coil 3, so that the injection rate of the cooling liquid is improved, the pressure intensity of the cooling liquid at the spray opening 301 is enhanced, the injection rate of the cooling liquid is improved, the time (namely water quenching time) for injecting the cooling liquid to the surface of the drill rod 5 is shortened, the quenching effect is obviously improved, and the surface hardness of a product is obviously enhanced. The water pipe 302 is connected with a water pump, a control valve is arranged on the water pipe 302, and the water inlet speed of the cooling liquid and the opening and closing of a water inlet channel can be controlled by adjusting the control valve. The water pump continuously feeds cooling liquid into the hollow structure of the induction coil 3 through the water pipe 302, and the cooling of the induction coil 3 is not affected. When the pressure value born by the induction coil 3 is within the safety range, the larger the pressure at the spray opening 301 is, the better the pressure is, the quenching effect is improved, and simultaneously, the oxide skin on the surface of the drill rod 5 can be thoroughly cleaned, so that the purpose of improving the surface quality of the drill rod 5 is achieved.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 6, the spraying openings 301 are uniformly arranged along the inner sidewall of the induction coil 3. In this embodiment, the spray opening 301 is disposed on the inner side wall of the induction coil 3, so that the cooling liquid sprayed from the spray opening 301 can be sprayed onto the surface of the drill rod 5 as much as possible, and the cooling rate of the surface of the drill rod 5 is increased. The quantity that sprays mouthful 301 is a plurality of, evenly sets up along induction coil 3's spiral orbit for it is more even to spray mouthful 301 spun coolant liquid, guarantees to spray the region that mouthful 301 covered and can cool down simultaneously, prevents that local cooling road rate is different and lead to the quenching effect not good. Meanwhile, the spraying port 301 is circular or oval, so that the processing is convenient, the processing cost is effectively reduced, the uniform pressure distribution at the edge of the spraying port 301 can be ensured, and the induction coil 3 cannot be damaged due to overlarge local stress.
Referring to fig. 6, as a specific implementation manner of the embodiment of the present invention, the shower opening 301 is disposed on at least one turn of the induction coil 3. In this embodiment, the spraying opening 301 is disposed on at least one turn of the induction coil 3, so that the spraying opening 301 can spray the periphery of the drill rod 5 at the same time, and the situation that the local part of the drill rod 5 is not sprayed is prevented. The size of the arrangement area of the spray opening 301 on the induction coil 3 can be adjusted adaptively according to the radial size of the drill rod 5, the feeding speed of the drill rod 5 and other factors, so as to ensure that the quenching effect of the drill rod 5 reaches the best.
Referring to fig. 6, as a specific implementation manner of the embodiment of the present invention, the size of the shower opening 301 is 1/3-1/4 of the radial size of the induction coil 3. In this embodiment, the size of the shower opening 301 is selected to be 1/3 of the radial size of the induction coil 3, taking into consideration the jetting effect of the cooling liquid at the shower opening 301 and the structural strength at the shower opening 301.
Referring to fig. 1, a water tank 4 is disposed below an induction coil 3 for collecting cooling liquid sprayed from a spray opening 301. In this embodiment, the cooling liquid has been held in water tank 4, and the water pump carries the cooling liquid in the water tank 4 to the hollow structure of induction coil 3 in, and the cooling liquid from spraying mouth 301 spun has collected through water tank 4 again, has formed the circulation system of cooling liquid for the cooling liquid can recycle, reduces the waste of resource. Since the temperature of the coolant sprayed on the surface of the drill rod 5 is increased, in order to prevent the temperature from being too high when the coolant is circulated into the induction coil 3 again, thereby reducing the quenching effect of the drill rod 5, the coolant in the water tank 4 needs to be cooled, and the coolant in the water tank 4 is ensured to be kept at a lower temperature all the time.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 3, the transmission mechanism 2 includes: a driving motor 201, a driving pulley 202 and a driven pulley 203. The driving motor 201 is fixedly arranged on the support frame 1; the driving wheel 202 is fixedly connected with an output shaft of the driving motor 201, the axial direction of the driving wheel 202 is parallel to the length direction of the support frame 1, and the driving wheel 202 is used for driving the drill rod 5 to rotate around the axial direction of the drill rod 5; the driven wheels 203 are rotatably arranged on the support frame 1, the axial direction of the driven wheels 203 and the horizontal direction form an acute angle, and every two driven wheels 203 which are arranged in a central symmetry way form a group; a plurality of groups of driven wheels 203 are arranged side by side along the length direction of the support frame 1 and are used for supporting and driving the drill rod 5 to move along the axial direction of the drill rod 5. In this embodiment, the driving motors 201 are stepless speed-regulating motors, and the number of the driving motors 201 is two, and the two driving motors are respectively located at two sides of the induction coil 3. The driving wheel 202 is parallel to the axis of the drill rod 5, the peripheral surface of the driving wheel 202 is abutted against the peripheral surface of the drill rod 5, and the drill rod 5 rotates around the axis of the drill rod 5 through the friction action of the driving wheel 202 and the drill rod 5. The top surfaces of a group of driven wheels 203 which are arranged centrosymmetrically are abutted with the peripheral surface of the drill rod 5, and the drill rod 5 is supported. The sets of driven wheels 203 constitute a transfer track for the drill rods 5. Because the included angle between the axial direction of the driven wheel 203 and the horizontal direction is an acute angle, when the driving wheel 202 drives the drill rod 5 to rotate around the axis of the driving wheel, the drill rod 5 drives the driven wheel 203 to rotate, the driven wheel 203 converts the rotary motion of the drill rod 5 into linear motion, and the drill rod 5 rotates and simultaneously realizes linear feeding. The feed direction of the drill rod 5 is determined by the direction of rotation of the drill rod 5 and the direction of inclination of the driven wheel 203. The driven wheel 203 on the side corresponding to the direction of rotation of the top of the drill rod 5 is determined, and the direction of inclination of the opposite side of the driven wheel 203 is the direction of feed of the drill rod 5, as viewed in the direction of view of fig. 2. The drill rod 5 adopts a rotary feeding mode, so that the induction coil 3 can heat and quench the drill rod 5 more fully, and the quenching efficiency and the quenching effect are improved.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 4 and fig. 5, the transmission mechanism 2 further includes: a sleeve 204, a support post 205, and a connecting rod 206. The sleeve 204 is arranged on the support frame 1; one end of the supporting column 205 is connected with the sleeve 204 in a sliding way, and the other end is hinged with the driven wheel 203; a guide chute matched with the support column 205 is arranged in the sleeve 204; the connecting rod 206 is arranged in the sleeve 204 and has a degree of freedom of axial rotation around the connecting rod; the connecting rod 206 is in threaded connection with the supporting column 205 and is used for driving the supporting column 205 to slide in the guide sliding groove. In this embodiment, the sleeve 204 is welded to the support frame 1, and the sleeve 204 and the support frame 1 are disposed in an inclined manner. The supporting column 205 is provided with a pin shaft for fixing the driven wheel 203, and the top surface of the driven wheel 203 is higher than the top surface of the supporting column 205. The matching part of the supporting column 205 and the guiding chute is a cylinder, so the supporting column 205 can rotate around its own axis while sliding along the guiding chute. The connecting rod 206 is used for connecting the sleeve 204 and the supporting column 205, and the linear motion of the supporting column 205 along the guide sliding groove is realized through the relative rotation of the connecting rod 206 and the supporting column 205. A locking nut 210 (i.e., a jackscrew) is mounted on the side wall of the sleeve 204, and when the position and the angle of the supporting column 205 are determined, the supporting column 205 is fixed by the locking nut 210, so that the supporting column 205 is prevented from being displaced relative to the sleeve 204 in the working process. The feeding direction and the feeding speed of the drill rod 5 are changed by adjusting the included angle of the supporting column 205 corresponding to each group of driven wheels 203. Meanwhile, the rotating speed of the driving motor 201 and the height and the angle of the supporting column 205 are adjusted to match the rotating speed and the feeding speed of the drill rods 5 which are suitable for different specifications, so that the heating efficiency of heat treatment is improved, and the heat treatment effects with different process requirements are obtained.
As a specific implementation manner of the embodiment of the present invention, referring to fig. 5, a limiting flange 208 matched with the sleeve 204 is disposed at one end of the connecting rod 206 away from the supporting column 205, a base 209 is installed at the bottom of the sleeve 204, and the base 209 abuts against an end surface of the limiting flange 208 to limit the limiting flange 208 in the sleeve 204. In this embodiment, the bottom of the sleeve 204 is provided with a mounting groove matched with the limiting flange 208, and the limiting flange 208 is limited in the mounting groove by the base 209, so that the connecting rod 206 can only rotate around its own axis in the sleeve 204. Offer the hole of dodging of connecting rod 206 on the spacing flange 208, conveniently operate connecting rod 206, conveniently rotate the operation to connecting rod 206 simultaneously, process out the recess of a word or cross on the terminal surface of connecting rod 206 (this terminal surface is the exposed surface of connecting rod 206 and is perpendicular with the axial of connecting rod 206). In order to prevent the connecting rod 206 from loosening with the supporting column 205 during the violent movement, a locking nut 210 is mounted on the side surface of the base 209, and the locking nut 210 passes through the side wall of the base 209 and abuts against the connecting rod 206, so that the connecting rod 206 is fixed.
The invention also provides a heat treatment method of the drill rod for the blast furnace opening, which comprises the following steps:
and a feeding step, wherein the drill rod to be processed is conveyed to the conveying mechanism through a feeding machine.
And a quenching step, namely heating the drill rod to be treated to the quenching temperature by using an induction coil in the feeding process of the drill rod to be treated, and spraying cooling liquid to cool the drill rod heated to the quenching temperature by using a spraying port arranged at the tail end of the induction coil.
And a tempering step, namely heating the quenched drill rod to a tempering temperature by using an induction coil, and carrying out air cooling on the drill rod heated to the tempering temperature to obtain the target drill rod.
In this embodiment, the heating method in the quenching step and the tempering step is ultrasonic induction heating to improve the thermal conductivity.
Taking a blast furnace opening drill rod of 42 multiplied by 3200 as an example, the diameter of the drill rodThe length L of the drill rod is 3200mm, and the two ends of the drill rod are provided with R38 type threads. The drill rod is made of 45 steel, the quenching temperature is 1000-1100 ℃, and the tempering temperature is about 300 ℃.
Because the drill rods for the blast furnace opening are produced in batches, the induction coils with the spraying openings and the common induction coils can be sequentially arranged on the transmission mechanism along the transmission direction, so that the quenching treatment and tempering heating operation of the drill rods can be completed on one heat treatment device, the production efficiency is improved, and meanwhile, the occupied area of heat treatment equipment is reduced.
Compared with the prior art, the heat treatment method for the drill rod for the blast furnace opening provided by the invention has the advantages that the feeding motion of the drill rod to be treated is realized by means of the transmission mechanism, the drill rod to be treated is heated to the quenching temperature by using the induction coil, and the drill rod heated to the quenching temperature is sprayed and cooled by using the spraying port arranged at the tail end of the induction coil, so that the quenching operation time of the drill rod is shortened, the production efficiency is improved, and meanwhile, the cooling liquid spraying operation is carried out on the drill rod, the oxide skin on the surface of the drill rod can be effectively removed, and the surface quality of the drill rod is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A heat treatment device for a drill rod for a blast furnace opening is characterized by comprising:
a support frame;
the transmission mechanism is fixedly arranged on the support frame and is used for transmitting the drill rod; and
the induction coil is fixedly arranged on the support frame and positioned above the transmission mechanism and is used for being connected with induction heating equipment to heat the drill rod on the transmission mechanism; and the tail end of the induction coil is provided with a spraying port for spraying cooling liquid for quenching the heated drill rod.
2. The heat treatment apparatus for a drill rod for a blast furnace opening according to claim 1, wherein the induction coil has a hollow structure, and both ends of the induction coil are connected to water pipes for feeding water.
3. A heat treatment apparatus for a drill rod for a blast furnace opening according to claim 1, wherein said shower ports are uniformly arranged along an inner side wall of said induction coil.
4. A heat treatment apparatus for a drill rod for a blast furnace opening according to claim 1, wherein said shower port is disposed at least one turn of said induction coil.
5. A heat treatment apparatus for a drill rod for a blast furnace opening as set forth in claim 1, wherein said spray opening is sized 1/3-1/4 of a radial size of said induction coil.
6. A heat treatment apparatus for a drill rod for a blast furnace opening according to claim 1, wherein a water tank for collecting the coolant sprayed from said spray port is provided below said induction coil.
7. A heat treatment apparatus for a drill rod for a blast furnace opening according to claim 1, wherein said transfer mechanism comprises:
the driving motor is fixedly arranged on the supporting frame;
the driving wheel is fixedly connected with an output shaft of the driving motor, the axial direction of the driving wheel is parallel to the length direction of the support frame, and the driving wheel is used for driving the drill rod to rotate around the axial direction of the drill rod; and
the driven wheel is rotatably arranged on the supporting frame; the driven wheels are arranged in an acute angle manner in the axial direction and the horizontal direction, and every two driven wheels which are arranged in a central symmetry manner form a group; and a plurality of groups of driven wheels are arranged side by side along the length direction of the support frame and are used for supporting and driving the drill rod to move along the axial direction of the drill rod.
8. A heat treatment apparatus for a drill rod for a blast furnace opening according to claim 7, wherein said transfer mechanism further comprises:
the sleeve is arranged on the supporting frame;
one end of the supporting column is connected with the sleeve in a sliding mode, and the other end of the supporting column is hinged with the driven wheel; a guide sliding groove matched with the support column is arranged in the sleeve; and
the connecting rod is arranged in the sleeve and has the freedom degree of rotating around the axial direction of the connecting rod; the connecting rod is in threaded connection with the supporting column and used for driving the supporting column to slide in the guide sliding groove.
9. A heat treatment device for a drill rod for a blast furnace opening according to claim 8, wherein a limiting flange engaged with the sleeve is provided at an end of the connecting rod away from the supporting column, and a base is mounted at the bottom of the sleeve and abuts against an end surface of the limiting flange for limiting the limiting flange in the sleeve.
10. The heat treatment method of the drill rod for the blast furnace opening is characterized by comprising the following steps of:
a feeding step, wherein the drill rod to be processed is conveyed to a conveying mechanism through a feeding machine;
a quenching step, in the feeding process of the drill rod to be treated, heating the drill rod to be treated to a quenching temperature by using an induction coil, and spraying cooling liquid to cool the drill rod heated to the quenching temperature by using a spraying port arranged at the tail end of the induction coil;
and a tempering step, namely heating the quenched drill rod to a tempering temperature by using an induction coil, and carrying out air cooling on the drill rod heated to the tempering temperature to obtain the target drill rod.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911006980.5A CN110607423A (en) | 2019-10-22 | 2019-10-22 | Heat treatment device and method for drill rod for blast furnace opening |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911006980.5A CN110607423A (en) | 2019-10-22 | 2019-10-22 | Heat treatment device and method for drill rod for blast furnace opening |
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| CN110607423A true CN110607423A (en) | 2019-12-24 |
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| CN201911006980.5A Pending CN110607423A (en) | 2019-10-22 | 2019-10-22 | Heat treatment device and method for drill rod for blast furnace opening |
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