CN117587217A - Drill rod heat treatment air cooling device and method - Google Patents
Drill rod heat treatment air cooling device and method Download PDFInfo
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- CN117587217A CN117587217A CN202410070095.8A CN202410070095A CN117587217A CN 117587217 A CN117587217 A CN 117587217A CN 202410070095 A CN202410070095 A CN 202410070095A CN 117587217 A CN117587217 A CN 117587217A
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- 238000001816 cooling Methods 0.000 title claims abstract description 135
- 238000010438 heat treatment Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title abstract description 5
- 238000010583 slow cooling Methods 0.000 claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 230000009970 fire resistant effect Effects 0.000 claims description 35
- 238000004804 winding Methods 0.000 claims description 22
- 230000009467 reduction Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 3
- 238000010791 quenching Methods 0.000 abstract description 8
- 230000000171 quenching effect Effects 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 description 14
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000009916 joint effect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007669 thermal treatment Methods 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
- 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
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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
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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
- Y02P10/20—Recycling
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Abstract
The invention provides a drill rod heat treatment air cooling device and a method, which belong to the technical field of drill rod heat treatment quenching and comprise square cylinder bodies, flexible refractory belts and adjusting structures, wherein the two flexible refractory belts are symmetrically arranged on two sides of the inside of the square cylinder bodies, the two flexible refractory belts and the front side wall and the rear side wall of the square cylinder bodies jointly enclose an air cooling channel, an air exhaust pipeline is inserted into an upper port of the air cooling channel, an air supply pipeline is arranged in a lower port of the air cooling channel, the two adjusting mechanisms are respectively connected with preset areas on the outer sides of the two flexible refractory belts, the preset areas are correspondingly arranged with a slow cooling area of the drill rod, and the over-current cross-section area of the air cooling channel in the preset areas is reduced by adjusting the distance between the two preset areas. The drill rod heat treatment air cooling device provided by the invention can increase the flow speed of cooling air flow flowing through the drill rod slow cooling zone, further take away more heat, improve the cooling zone speed of the drill rod slow cooling zone and ensure that the drill rod is uniformly cooled as a whole.
Description
Technical Field
The invention belongs to the technical field of drill rod heat treatment quenching, and particularly relates to a drill rod heat treatment air cooling device and a drill rod heat treatment air cooling method.
Background
The drill rod series products are mainly used in the fields of mining, tunnel construction, engineering construction and the like, along with the upgrading of equipment and the increase of the quality requirement of clients, the quality requirement on the drill rod is higher and higher, wherein the heat treatment is a key factor influencing the quality of the drill rod, the key point of the heat treatment of the drill rod is air-cooled quenching, at present, the mode of carrying out air-cooled quenching on the drill rod is simpler, the drill rod is usually hung in a cylindrical device, air is guided by a fan to pass through the drill rod from the inside of the cylindrical device for carrying out air-cooled treatment on the drill rod, however, for drill rods with uniform thickness, when in air-cooled quenching, cooling air flows from the upper end or the lower end of the drill rod to the other end of the drill rod, the temperature of the cooling air flow is continuously increased, so that a slow cooling area is formed on the drill rod, and for the drill rods with outer diameter increased sections, the drill rods with the outer diameter increased sections are more, when in the air-cooled quenching, the outer diameter increased sections form the slow cooling area, the drill rods with the hardness is not influenced by the heat exchange, and the whole hardness of the drill rods is not influenced, and the quality of the drill rods is not subjected to the heat treatment.
Disclosure of Invention
The invention aims to provide a drill rod heat treatment air cooling device, which aims to solve the problem of uneven overall cooling speed of a drill rod due to a slow cooling zone in the air cooling quenching process of the drill rod.
In order to achieve the above purpose, the invention adopts the following technical scheme: provided is a drill rod heat treatment air cooling device, comprising:
the air exhaust pipe is arranged above the square cylinder, and the air supply pipe is arranged below the square cylinder;
the two flexible fire-resistant belts are symmetrically arranged on the left side and the right side of the interior of the square cylinder body, the two lateral side ends of the flexible fire-resistant belts are respectively attached to the front side wall and the rear side wall of the square cylinder body, the two flexible fire-resistant belts, the front side wall and the rear side wall of the square cylinder body jointly enclose an air cooling channel, an exhaust pipeline is inserted into the upper port of the air cooling channel, and an air supply pipeline is inserted into the lower port of the air cooling channel;
the two adjusting mechanisms are respectively connected to preset areas on the outer sides of the flexible refractory belts, the preset areas are arranged corresponding to the slow cooling areas of the drill rods, and the distance between the two preset areas is adjusted to reduce the flow cross-section area of the air cooling channel in the preset areas.
In one possible implementation manner, an upper winding and unwinding roller and a lower winding and unwinding roller are respectively arranged between the front side wall and the rear side wall of the square cylinder corresponding to the flexible refractory belt, the upper end of the flexible refractory belt is wound on the upper winding and unwinding roller, and the lower end of the flexible refractory belt is wound on the lower winding and unwinding roller.
In one possible implementation manner, the adjusting mechanism includes three retractors, the three retractors are arranged along the length direction of the square cylinder at intervals, the telescopic ends of the retractors located in the middle are fixedly connected with the flexible fire-resistant belts on the same side, and the telescopic ends of the retractors located on two sides are abutted with the flexible fire-resistant belts on the same side.
In one possible implementation manner, the left side wall and the right side wall of the square cylinder are both provided with sliding rails along the length direction of the left side wall and the right side wall, three sliding blocks are slidably arranged on the sliding rails, and three retractors located on the same side are correspondingly fixed on the three sliding blocks on the same side.
In a possible implementation manner, the exhaust pipeline is provided with a first connecting portion, the first connecting portion is inserted into the upper port of the air cooling channel, the lower end of the first connecting portion is provided with an air outlet communicated with the air cooling channel, one side of the air outlet corresponding to the flexible fire-resistant belt is hinged with a first baffle, a first torsion spring is arranged between the first baffle and the first connecting portion and used for enabling the first baffle to abut against the flexible fire-resistant belt on the same side of the first baffle, the upper end of the first connecting portion is provided with a feeding port, the feeding port is provided with a movable cover, and a first temperature sensor is arranged in the first connecting portion.
In a possible implementation manner, a second connecting portion is arranged on the air supply pipeline, the second connecting portion is inserted into the lower port of the air cooling channel, an air supply port communicated with the air cooling channel is arranged at the upper end of the second connecting portion, a second baffle is hinged to one side of the air supply port corresponding to the flexible fire-resistant belt, a second torsion spring is arranged between the second baffle and the second connecting portion, the second torsion spring is used for enabling the second baffle to abut against the flexible fire-resistant belt on the same side of the second baffle, and a second temperature sensor is arranged in the second connecting portion.
In one possible implementation, the air supply pipeline is provided with a heater and a first drainage fan.
In one possible implementation manner, a connecting pipeline is connected between the exhaust pipeline and the air supply pipeline, and a flow controller and a second drainage fan are arranged on the connecting pipeline.
In one possible implementation manner, a hanging rod is arranged at the upper end of the air cooling channel and connected between the front side wall and the rear side wall of the square cylinder, a longitudinal rod is connected to the middle of the hanging rod, and a plurality of third temperature sensors are arranged on the longitudinal rod from top to bottom at intervals.
The drill rod heat treatment air cooling device provided by the invention has the beneficial effects that: compared with the prior art, the drill rod heat treatment air cooling device has the advantages that the preset area is arranged on the flexible refractory belts, the preset area corresponds to the slow cooling area on the drill rod, the distance between the preset areas on the two flexible refractory belts is adjusted and regulated through the adjusting mechanism, so that the overcurrent cross-sectional area of the air cooling channel in the preset area is reduced, the flow speed of cooling air flow is increased when the cooling air flow passes through the preset area on the air cooling channel, the convection heat exchange coefficient between the rod body part of the drill rod in the slow cooling area and the cooling air flow is increased, more heat can be taken away by the cooling air flow, the cooling speed of the slow cooling area of the drill rod is improved, and the drill rod is uniformly cooled up and down integrally.
The invention aims to provide a drill rod heat treatment air cooling method, which uses the drill rod heat treatment air cooling device and comprises the following steps:
s1: determining a drill rod slow cooling zone according to the structure of the drill rod, moving the telescopic device to a preset zone corresponding to the flexible refractory belts in the drill rod slow cooling zone, starting the telescopic device to inwards extrude the two flexible refractory belts, and forming a diameter reduction zone on the air cooling channel;
s2: putting the drill rod into an air cooling channel, starting a first drainage fan in an air supply channel, acquiring an inlet temperature value of air flow at an inlet of the air cooling channel, and heating the air flow in the air supply channel when the inlet temperature value is lower than a preset inlet temperature threshold value;
s3: acquiring an outlet temperature value of air flow at an outlet of the air cooling channel, when the outlet temperature value is within a preset outlet temperature threshold value, starting a connecting pipeline and a second drainage fan to enable part of air flow in the exhaust pipeline to flow into the air supply pipeline through the connecting pipeline, heating the air flow in the air supply pipeline, and when the outlet temperature value is lower than the preset outlet temperature threshold value, closing the connecting pipeline, opening a heater in the air supply pipeline, and heating the air flow in the air supply pipeline;
s4: the temperature change of the upper part and the lower part of the drill rod is monitored in real time through a third temperature sensor, and the action of the telescopic device is controlled according to the temperature change of the drill rod, so that the diameter reducing area on the air cooling channel is adjusted;
s5: when the temperature of the drill rod is reduced to a preset temperature, the first drainage fan stops working, and the drill rod is taken out of the air cooling channel.
Compared with the prior art, the heat treatment air cooling method for the drill rod has the advantages that the diameter reduction area is arranged on the air cooling channel corresponding to the slow cooling area of the drill rod, so that the flow speed of cooling air flow in the air cooling channel in the diameter reduction area is increased, the convection heat exchange coefficient between the rod body part of the drill rod, which is positioned in the slow cooling area, and the cooling air flow is increased, and more heat can be taken away by the cooling air flow, so that the cooling speed of the slow cooling area of the drill rod is increased, and the drill rod can be uniformly cooled up and down as a whole.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic top view of a heat treatment air cooling device for a drill rod according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;
FIG. 4 is a cross-sectional view taken along line C-C of FIG. 2;
fig. 5 is a schematic top view of a square cylinder according to an embodiment of the present invention;
fig. 6 is a schematic front view of an abutting telescopic device according to an embodiment of the present invention.
Reference numerals illustrate:
1. a square cylinder; 101. an upper winding and unwinding roller; 102. a lower winding and unwinding roller; 103. a guide roller; 104. a connecting plate; 105. a driving motor; 106. a hanging rod; 107. a longitudinal bar; 108. a third temperature sensor; 2. an exhaust duct; 21. a first connection portion; 211. a movable cover; 212. a handle; 213. a first baffle; 214. a first temperature sensor; 3. an air supply duct; 31. a second connecting portion; 311. a second baffle; 312. a second temperature sensor; 32. a first drainage fan; 33. a heater; 4. a flexible refractory belt; 51. abutting the telescopic device; 511. a first cross bar; 512. a contact roller; 52. a traction retractor; 521. a second cross bar; 53. a slide rail; 531. a guide rail; 54. a connecting baffle; 55. a transmission screw; 56. a drive motor; 57. a slide block; 6. a connecting pipe; 61. a second drainage fan; 62. a flow controller; 7. and (5) an air cooling channel.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the 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 for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The air cooling quenching process of the drill rod mainly comprises convection heat exchange, and the formula of the convection heat exchange is known as follows: q=ah (T2-T1), Q being the heat locally transferred by a certain shank; a is the contact area of the part of drill rod and the air flow; h is a convection heat transfer coefficient; t2 is the temperature of the shank and T1 is the temperature of the air flowing there through. The air flow for cooling is gradually heated in the flow with heat exchange, which results in different points T1 and thus Q.
In order to achieve the purpose of keeping Q consistent, namely the uniformity of heat dissipation at each position of the drill rod, the characteristic that h changes along with the flow velocity can be utilized, the convection heat exchange coefficient h is controlled by controlling the wind speed on each flow cross section of the air cooling pipeline, when the flow cross section area of the air cooling pipeline is larger, the wind speed is slower, the convection heat exchange coefficient h is smaller, the transferred heat Q is smaller, when the flow cross section area of the air cooling pipeline is smaller, the wind speed is faster, the convection heat exchange coefficient h is larger, and the transferred heat Q is larger.
Referring to fig. 1 to 5, an air cooling device for heat treatment of a drill rod according to the present invention will now be described. The utility model provides a drill rod thermal treatment air cooling device, including square barrel 1, flexible fire-resistant area 4 and adjustment mechanism, wherein, the top of square barrel 1 is equipped with exhaust duct 2, the below of square barrel 1 is equipped with air supply pipeline 3, the quantity of flexible fire-resistant area 4 is two, the inside left and right sides of square barrel 1 is located to two flexible fire-resistant areas 4 symmetry, flexible fire-resistant area 4 horizontal both sides end respectively with square barrel 1's preceding lateral wall and back lateral wall laminating, two flexible fire-resistant area 4 enclose jointly with square barrel 1's preceding lateral wall, the back lateral wall becomes air cooling passageway 7, exhaust duct 2 cartridge is in air cooling passageway 7's upper port, air supply pipeline 3 cartridge is in air cooling passageway 7's lower port, adjustment mechanism's quantity is two, two adjustment mechanism are connected in the predetermined area in two flexible fire-resistant area 4 outsides respectively, predetermined area corresponds the slow cooling area of drill rod sets up, through adjusting the distance of two predetermined areas, in order to reduce air cooling passageway 7 at predetermined area's cross-section.
In this embodiment, the flexible fire-resistant belt 4 may be a metal aluminum belt with a thickness between 0.3 mm and 0.8mm, the metal aluminum belt has good flexibility and a certain toughness, and can resist high temperature baking, the upper end of the flexible fire-resistant belt 4 is wound on the upper winding and unwinding roller 101, the lower end of the flexible fire-resistant belt 4 is wound on the lower winding and unwinding roller 102, the upper winding and unwinding roller 101 and the lower winding and unwinding roller 102 are both arranged between the front side wall and the rear side wall inside the square cylinder 1, the middle parts of the upper winding and unwinding roller 101 and the lower winding and unwinding roller 102 are both provided with transmission shafts in a penetrating manner, one end of each transmission shaft penetrates through the side wall of the square cylinder 1 and is connected with a peripheral driving motor 105, and when in use, the driving motor 105 drives the upper winding and unwinding roller 101 and the lower winding and unwinding roller 102 to rotate, so that the flexible fire-resistant belt 4 can be tensioned or relaxed.
Optionally, a guide roller 103 is further arranged on one side, close to the axis of the square cylinder 1, of the upper winding and unwinding roller 101 and the lower winding and unwinding roller 102, the guide roller 103 is rotatably connected between the front side wall and the rear side wall of the square cylinder 1, and two ends of the flexible refractory belt 4 are wound on the upper winding and unwinding roller 101 and the lower winding and unwinding roller 102 after bypassing the guide roller 103.
Compared with the prior art, the drill rod heat treatment air cooling device provided by the invention has the advantages that the preset area is arranged on the flexible refractory belts 4 and corresponds to the slow cooling area on the drill rod, and the distance between the preset areas on the two flexible refractory belts 4 is regulated and regulated by the regulating mechanism, so that the cross-sectional area of the air cooling channel 7 in the preset area is reduced, the flow speed of cooling air flow is increased when the cooling air flow passes through the preset area on the air cooling channel 7, the convection heat exchange coefficient of the rod body part in the slow cooling area on the drill rod and the cooling air flow is increased, and more heat can be taken away by the cooling air flow, so that the cooling speed of the slow cooling area of the drill rod is increased, and the drill rod is uniformly cooled up and down as a whole.
In some embodiments, please refer to fig. 2 to 4, the left side wall and the right side wall in the square cylinder 1 are respectively provided with a sliding rail 53, the length direction of the sliding rail 53 is the same as the length direction of the square cylinder 1, the sliding rails 53 are slidably provided with sliding blocks 57, in this embodiment, each sliding rail 53 comprises two parallel guide rails 531, the sliding blocks 57 are connected between the two guide rails 531 and slidably connected with the two guide rails 531, threaded holes are formed in the sliding blocks 57, a transmission screw 55 is penetrated in the threaded holes, one end of the transmission screw 55 is in transmission connection with a transmission motor 56, in this embodiment, two ends of the two guide rails 531 are connected with connecting baffles 54, the number of the sliding blocks 57 is three, the three sliding blocks 57 can slide between the two connecting baffles 54, the number of the transmission screw 55 is three, the three transmission screws 55 are simultaneously penetrated through the three sliding blocks 57 and are rotatably connected between the two connecting baffles 54, in this embodiment, the three screws are in transmission fit with the three sliding blocks 57, each sliding block 57 is provided with a avoidance through hole, the other end of the three transmission motors are penetrated by the three transmission screws 57, and the transmission screws 56 can be understood to be in transmission by the sliding blocks 53.
In this embodiment, referring to fig. 2, 3, 4 and 6, the adjusting mechanism includes three retractors, which may be electric telescopic rods, cylinders or hydraulic cylinders, etc., the three retractors are correspondingly mounted on the three sliders 57, the retractors located on two sides are abutting retractors 51, the retractors located in the middle are traction retractors 52, the telescopic ends of the abutting retractors 51 are connected with a first cross rod 511, the first cross rod 511 is sleeved with an abutting roller 512, and when in use, the abutting roller 512 abuts against the flexible fire-resistant belt 4, the telescopic ends of the traction retractors 52 are hinged with a second cross rod 521, and the second cross rod 521 is welded and fixed with the flexible fire-resistant belt 4. Through the arrangement, the device has stronger adaptability, in application, the shape of the flexible fire-resistant belt 4 in a specific area on the air cooling channel 7 is changed in an adaptive manner by controlling the positions of the two abutting telescopic devices 51 and the one traction telescopic device 52 and the telescopic lengths of the telescopic ends of the abutting telescopic devices 51 and the traction telescopic device 52 according to the type and the structural characteristics of a product to be cooled, so that the overcurrent cross-sectional area of the air cooling channel 7 in the specific area is changed, the flow rate of cooling air flow passing through the specific area is regulated, the cooling speed of the part of the product to be cooled in the specific area is controlled, and the product to be cooled can be cooled uniformly up and down integrally.
In some embodiments, referring to fig. 1 to 2, a first connecting portion 21 is disposed on the exhaust duct 2, the first connecting portion 21 is inserted into an upper port of the air cooling channel 7, the first connecting portion 21 is welded and fixed with the square cylinder 1 through the connecting plate 104, an air outlet communicating with the air cooling channel 7 is disposed at a lower end of the first connecting portion 21, a first baffle 213 is hinged to one side of the air outlet corresponding to the flexible refractory belt 4, a first torsion spring is disposed between the first baffle 213 and the first connecting portion 21, an elastic force provided by the first torsion spring is used for enabling the first baffle 213 to abut against the flexible refractory belt 4 on the same side of the first baffle 213, and by means of the first baffle 213 and the first torsion spring hinged by the first connecting portion 21, when the shape of the flexible refractory belt 4 is changed, the first baffle 213 can be constantly kept in abutment with the flexible refractory belt 4, so that a good lap joint effect is maintained with the flexible refractory belt 4, and excessive gaps between the first baffle 213 and the flexible refractory belt 4 are avoided, so that the cooling air flows overflow.
In this embodiment, the upper end of the first connecting portion 21 is provided with a feeding hole, the feeding hole is provided with a movable cover 211, the movable cover 211 is provided with a handle 212, and when in use, the movable cover 211 is opened to throw the drill rod to be cooled into the air cooling channel 7, or take the cooled drill rod out of the air cooling channel 7.
In this embodiment, the air supply pipeline 3 is provided with the second connecting portion 31, the second connecting portion 31 is inserted into the lower port of the air cooling channel 7, the second connecting portion 31 is welded and fixed with the square cylinder 1 through the connecting plate 104, the upper end of the second connecting portion 31 is provided with an air supply port communicated with the air cooling channel 7, one side of the air supply port corresponding to the flexible fire-resistant belt 4 is hinged with the second baffle 311, a second torsion spring is arranged between the second baffle 311 and the second connecting portion 31, the second torsion spring is used for enabling the second baffle 311 to abut against the flexible fire-resistant belt 4 on the same side, through the arrangement, by means of the second baffle 311 hinged with the second connecting portion 31 and the second torsion spring, when the shape of the flexible fire-resistant belt 4 changes, the second baffle 311 can be abutted with the flexible fire-resistant belt 4 constantly, so that the second baffle 311 and the flexible fire-resistant belt 4 keep good lap joint effect, and excessive gaps between the second baffle 311 and the flexible fire-resistant belt 4 are avoided, and the cooling air flow is overflowed.
In some embodiments, referring to fig. 2, a first temperature sensor 214 is disposed in the first connection portion 21, the first temperature sensor 214 is used for monitoring a temperature value of an air flow at an upper port of the air cooling channel 7, a second temperature sensor 312 is disposed in the second connection portion 31, the second temperature sensor 312 is used for detecting a temperature value of an air flow at a lower port of the air cooling channel 7, a heater 33 and a first drainage fan 32 are disposed on the air supply channel 3, a connection pipeline 6 is connected between the air exhaust pipeline 2 and the air supply channel 3, a flow controller 62 and a second drainage fan 61 are disposed on the connection pipeline 6, a hanging rod 106 is disposed at an upper end of the air cooling channel 7, the hanging rod 106 is connected between a front side wall and a rear side wall of the square cylinder 1, a clamp for hanging a drill rod is disposed on the hanging rod 106, a longitudinal rod 107 is connected at a middle portion of the hanging rod 106, a plurality of third temperature sensors 108 are disposed on the longitudinal rod 107 from top to bottom at intervals, in use, the drill rod and the longitudinal rod 107 are vertically suspended in the air cooling channel 7, the drill rod and the longitudinal rod 107 are kept parallel to each other, and the third temperature sensors 108 are used for monitoring a temperature change in each portion of the whole.
In practical operation, the initial temperature of the air flow for cooling the drill rod is quite critical, and in summer and winter, even in noon and evening, the temperature of the air flow for cooling the gun rod is different due to the difference of the external environment temperature, so that the quality difference of the heat treated products is huge, in the embodiment, the heater 33 is arranged on the air supply pipeline 3 to heat the air flow in the air supply pipeline 3, and the air flow entering the cooling pipeline is heated to between 40 and 45 ℃, so that the problem that the cooling air flow is influenced by the external environment temperature, and the quality difference of the products is large is solved. In addition, in order to reduce the frequency of use of the heater 33, reduce the energy consumption and the operation cost, the device connects the connecting pipeline 6 with the air supply pipeline 3 and the air exhaust pipeline 2 by arranging the connecting pipeline 6, and in the application, the temperature of the air flow in the air supply pipeline 3 is increased after the air flow passes through the cooling channel to exchange heat with the drill rod, the part of the air flow with higher temperature in the air exhaust pipeline 2 is introduced into the air supply pipeline 3 by the second drainage fan 61 arranged on the connecting pipeline 6, the air flow with lower temperature in the air supply pipeline 3 is mixed and heated, so that the air flow entering the cooling pipeline reaches the proper temperature, and the heating degree of the air flow in the air supply pipeline is controlled by controlling the flow of the air flow in the connecting pipeline 6 by the flow controller 62 arranged on the air exhaust pipeline 2, so that the heater 33 arranged on the air supply pipeline is kept closed or the power is reduced, and the energy consumption is further reduced, and the operation cost is reduced.
The invention aims to provide a drill rod heat treatment air cooling method, which uses the drill rod heat treatment air cooling device and comprises the following steps:
s1: determining a drill rod slow cooling zone according to the structure of the drill rod, moving the telescopic device to a preset zone corresponding to the flexible refractory belts 4 in the drill rod slow cooling zone, starting the telescopic device to inwards extrude the two flexible refractory belts 4, and forming a diameter reduction zone on the air cooling channel 7;
s2: putting the drill rod into the air cooling channel 7, starting a first drainage fan 32 in the air supply channel 3, acquiring an inlet temperature value of air flow at the inlet of the air cooling channel 7, and heating the air flow in the air supply channel 3 when the inlet temperature value is lower than a preset inlet temperature threshold value;
s3: acquiring an outlet temperature value of air flow at the outlet of the air cooling channel 7, when the outlet temperature value is within a preset outlet temperature threshold value, opening the connecting pipeline 6 and the second drainage fan 61 to enable part of air flow in the exhaust pipeline to flow into the air supply pipeline 3 through the connecting pipeline 6, heating the air flow in the air supply pipeline 3, and when the outlet temperature value is lower than the preset outlet temperature threshold value, closing the connecting pipeline 6, opening the heater 33 in the air supply pipeline 3, and heating the air flow in the air supply pipeline 3;
s4: the temperature change of the drill rod is monitored in real time through a third temperature sensor 108, and the action of the telescopic device is controlled according to the temperature change of the drill rod, so that the diameter reduction area on the air cooling channel 7 is adjusted;
s5: when the temperature of the drill rod is reduced to a preset temperature, the first drainage fan 32 stops working, and the drill rod is taken out of the air cooling channel 7.
Compared with the prior art, the drill rod heat treatment air cooling method provided by the invention has the advantages that the diameter reduction area is arranged on the air cooling channel 7 corresponding to the slow cooling area of the drill rod, so that the flow speed of cooling air flow in the air cooling channel 7 in the diameter reduction area is increased, the convection heat exchange coefficient between the rod body part positioned on the slow cooling area on the drill rod and the cooling air flow is increased, and more heat can be taken away by the cooling air flow, so that the cooling speed of the slow cooling area of the drill rod is improved, and the drill rod can be uniformly cooled up and down as a whole.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. A drill rod heat treatment air cooling device, comprising:
the air exhaust device comprises a square cylinder body (1), wherein an air exhaust pipeline (2) is arranged above the square cylinder body (1), and an air supply pipeline (3) is arranged below the square cylinder body (1);
the two flexible fire-resistant belts (4) are symmetrically arranged on the left side and the right side of the interior of the square cylinder body (1), the two lateral side ends of the flexible fire-resistant belts (4) are respectively attached to the front side wall and the rear side wall of the square cylinder body (1), the two flexible fire-resistant belts (4) and the front side wall and the rear side wall of the square cylinder body (1) jointly enclose an air cooling channel (7), the air exhaust pipeline (2) is inserted into the upper port of the air cooling channel (7), and the air supply pipeline (3) is inserted into the lower port of the air cooling channel (7);
the two adjusting mechanisms are respectively connected to preset areas on the outer sides of the two flexible refractory belts (4), the preset areas are arranged corresponding to the slow cooling areas of the drill rod, and the distance between the two preset areas is adjusted to reduce the overcurrent cross-sectional area of the air cooling channel (7) in the preset areas.
2. The drill rod heat treatment air cooling device according to claim 1, wherein an upper winding and unwinding roller (101) and a lower winding and unwinding roller (102) are respectively arranged between the front side wall and the rear side wall of the square cylinder (1) corresponding to the flexible refractory belt (4), the upper end of the flexible refractory belt (4) is wound on the upper winding and unwinding roller (101), and the lower end of the flexible refractory belt (4) is wound on the lower winding and unwinding roller (102).
3. A drill rod heat treatment air cooling device according to claim 2, wherein the adjusting mechanism comprises three retractors, the three retractors are arranged at intervals along the length direction of the square cylinder body (1), the telescopic ends of the retractors positioned in the middle are fixedly connected with the flexible fire-resistant belts (4) on the same side, and the telescopic ends of the retractors positioned on two sides are abutted with the flexible fire-resistant belts (4) on the same side.
4. A drill rod heat treatment air cooling device according to claim 3, wherein the left side wall and the right side wall of the square cylinder body (1) are provided with sliding rails (53) along the length direction thereof, the sliding rails (53) are slidably provided with three sliding blocks (57), and three retractors located on the same side are correspondingly fixed on the three sliding blocks (57) on the same side.
5. The drill rod heat treatment air cooling device according to claim 4, wherein a first connecting portion (21) is arranged on the exhaust pipeline (2), the first connecting portion (21) is inserted into an upper port of the air cooling channel (7), an air outlet communicated with the air cooling channel (7) is arranged at the lower end of the first connecting portion (21), a first baffle (213) is hinged to one side of the air outlet corresponding to the flexible fire-resistant belt (4), a first torsion spring is arranged between the first baffle (213) and the first connecting portion (21), the first torsion spring is used for enabling the first baffle (213) to abut against the flexible fire-resistant belt (4) on the same side of the first torsion spring, a feeding port is arranged at the upper end of the first connecting portion (21), a movable cover (211) is arranged on the feeding port, and a first temperature sensor (214) is arranged in the first connecting portion (21).
6. A drill rod heat treatment air cooling device according to claim 5, characterized in that a second connecting part (31) is arranged on the air supply pipeline (3), the second connecting part (31) is inserted into the lower port of the air cooling channel (7), an air supply port communicated with the air cooling channel (7) is arranged at the upper end of the second connecting part (31), a second baffle plate (311) is hinged at one side of the air supply port corresponding to the flexible refractory belt (4), a second torsion spring is arranged between the second baffle plate (311) and the second connecting part (31), the second torsion spring is used for enabling the second baffle plate (311) to be abutted against the flexible refractory belt (4) at the same side of the second torsion spring, and a second temperature sensor (312) is arranged in the second connecting part (31).
7. A drill rod heat treatment air cooling device according to claim 6, characterized in that the air supply pipeline (3) is provided with a heater (33) and a first drainage fan (32).
8. A drill rod heat treatment air cooling device according to claim 7, characterized in that a connecting pipeline (6) is connected between the exhaust pipeline (2) and the air supply pipeline (3), and a flow controller (62) and a second drainage fan (61) are arranged on the connecting pipeline (6).
9. The drill rod heat treatment air cooling device according to claim 8, wherein a hanging rod (106) is arranged at the upper end of the air cooling channel (7), the hanging rod (106) is connected between the front side wall and the rear side wall of the square cylinder body (1), a longitudinal rod (107) is connected to the middle part of the hanging rod (106), and a plurality of third temperature sensors (108) are arranged on the longitudinal rod (107) from top to bottom at intervals.
10. A drill rod heat treatment air cooling method using the drill rod heat treatment air cooling device as claimed in claim 9, comprising the steps of:
s1: determining a drill rod slow cooling zone according to the structure of the drill rod, moving the telescopic device to a preset zone corresponding to the flexible refractory belts (4) in the drill rod slow cooling zone, starting the telescopic device to inwards extrude the two flexible refractory belts (4), and forming a diameter reduction zone on the air cooling channel (7);
s2: the drill rod is placed in an air cooling channel (7), a first drainage fan (32) in an air supply channel (3) is started, an inlet temperature value of air flow at an inlet of the air cooling channel (7) is obtained, and when the inlet temperature value is lower than a preset inlet temperature threshold value, the air flow in the air supply channel (3) is subjected to heating treatment;
s3: acquiring an outlet temperature value of air flow at an outlet of an air cooling channel (7), when the outlet temperature value is within a preset outlet temperature threshold value, opening a connecting pipeline (6) and a second drainage fan (61), enabling part of air flow in an exhaust pipeline to flow into an air supply pipeline (3) through the connecting pipeline (6), heating the air flow in the air supply pipeline (3), and when the outlet temperature value is lower than the preset outlet temperature threshold value, closing the connecting pipeline (6), opening a heater (33) in the air supply pipeline (3), and heating the air flow in the air supply pipeline (3);
s4: the temperature change of the upper part and the lower part of the drill rod is monitored in real time through a third temperature sensor (108), and the action of the telescopic device is controlled according to the temperature change of the drill rod, so that the diameter reduction area on the air cooling channel (7) is adjusted;
s5: when the temperature of the drill rod is reduced to a preset temperature, the first drainage fan (32) stops working, and the drill rod is taken out of the air cooling channel (7).
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| CN202410070095.8A CN117587217B (en) | 2024-01-18 | 2024-01-18 | Drill rod heat treatment air cooling device and method |
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