CN111426205B - Drill steel cooling system and cooling method thereof - Google Patents

Drill steel cooling system and cooling method thereof Download PDF

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Publication number
CN111426205B
CN111426205B CN202010247438.5A CN202010247438A CN111426205B CN 111426205 B CN111426205 B CN 111426205B CN 202010247438 A CN202010247438 A CN 202010247438A CN 111426205 B CN111426205 B CN 111426205B
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cooling
drill steel
temperature
point
steel
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CN111426205A (en
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于恩林
李滢泽
牛身身
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BEIBO INTELLIGENT TECHNOLOGY QINHUANGDAO Co.,Ltd.
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Yanshan University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/0014—Devices for monitoring temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0024—Charging; Discharging; Manipulation of charge of metallic workpieces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

The invention discloses a drill steel cooling system which comprises a base, a workbench, an air cooling device, a propelling device, a positioning device, a temperature measuring device, a cooling device and a feedback device, wherein the temperatures of four nodes A1, A2, A3 and A4 are regulated and controlled by the feedback device; three sets of feedback devices are arranged in the axial direction to ensure that the actual cooling temperature of the shaft is controllable. The invention realizes the accurate control of the temperature of each point at the edge through the feedback system, and solves the problem of uneven cooling at the edge of the polygonal drill steel. The invention also discloses a method for cooling the drill steel, wherein feedback systems of the method respectively act on four nodes A1, A2, A3 and A4, the water flow is accurately controlled, the accurate water control is realized, the water consumption is reduced, in order to avoid that the temperature of the surface of the drill steel is increased again due to the self-tempering of the drill steel, the actual cooling temperature of the drill steel cannot reach the control temperature, three groups of feedback systems are uniformly distributed along the axial direction of the drill steel, and the actual cooling temperature of the drill steel is controllable.

Description

Drill steel cooling system and cooling method thereof
Technical Field
The invention relates to the field of drill steel cooling, in particular to a polygonal drill steel cooling system and a cooling method thereof.
Background
The drill steel is called hollow steel for drill rod, and its section mainly has two kinds, respectively polygonal and circular. Researches show that the polygonal hollow brazing steel has stronger fracture resistance and bending resistance and longer service life, thereby having wide development prospect.
However, problems arise during the cooling of polygonal drill steel. The seven-angle drill steel is taken as an example, cooling water is uniformly sprayed on the drill steel in the cooling process, and the water which has cooled the upper edge angle can also continuously cool the lower edge angle due to the flowing of the cooling water from top to bottom, so that the seven edge angles of the drill steel are cooled unevenly, the internal stress of the drill steel is unbalanced, and the quality of the drill steel is reduced because the working part of the drill steel is mainly the edge angle part. Secondly, during the cooling process of the drill steel, self-tempering phenomenon can be generated, namely, the temperature of the cooled drill steel part can not reach the control temperature due to the fact that the temperature difference between the surface and the center is caused after quenching, the phenomenon that the temperature of the cooled drill steel part rises back can occur, the surface hardness of the cooled drill steel cannot reach the expected effect, and the performance of the drill steel cannot reach the optimum.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a drill steel cooling system, which is characterized in that a plurality of cooling pipe groups are arranged on the periphery of drill steel, and the water outlet speed of the cooling pipes is regulated and controlled in real time, so that the drill steel is continuously regulated to a control temperature from a high temperature after being processed after passing through the plurality of cooling pipe groups, and the problems of uneven cooling at edges and corners and reduced performance of the drill steel caused by self-tempering are solved.
One aspect of the invention provides a drill steel cooling system, which comprises a base, a workbench, an air cooling device, a propelling device, a positioning device, a temperature measuring device, a cooling device and a feedback device,
the air cooling device comprises an air cooling dryer arranged at the first end of the base;
the propelling device comprises a propelling guide rod, a guide rail, a motor, a butterfly nut, a retracting cylinder, a telescopic column and a positioning column, wherein the guide rail is arranged on the base through the retracting cylinder and the telescopic column; the telescopic column is arranged in the contraction barrel, and the butterfly nut is arranged on the side surface of the contraction barrel and used for fixing the telescopic column;
the positioning device comprises a nut, a threaded pipe, a positioning chute, a first connecting rod, a second connecting rod, a trapezoidal plate and positioning plates, wherein the positioning chute is arranged on the surface of the workbench, the two positioning plates are arranged on the positioning chute, the trapezoidal plate is connected with the positioning plates through the first connecting rod and the second connecting rod, the threaded pipe is fixedly connected below the trapezoidal plate, the threaded pipe transversely penetrates through the workbench, and the nut is screwed on the threaded pipe below the workbench;
the temperature measuring deviceThe device comprises temperature measuring flat plates arranged at two sides of the workbench, and a drill steel A1 point temperature measuring camera, a drill steel A2 point temperature measuring camera, a drill steel A3 point temperature measuring camera and a drill steel A4 point temperature measuring camera which are arranged on the temperature measuring flat plates at intervals, wherein the drill steel A1 point temperature measuring camera observes the temperature T of a drill steel A1 point1The temperature measuring camera at the point A2 of the drill steel observes the temperature T at the point A2 of the drill steel2The temperature measuring camera at the point A3 of the drill steel observes the temperature T at the point A3 of the drill steel3The temperature measuring camera at the point A4 of the drill steel observes the temperature T at the point A4 of the drill steel4The brazing steel comprises a brazing steel A1 point, a brazing steel A2 point, a brazing steel A3 point and a brazing steel A4 point which sequentially form the top point of the outer circumference of the brazing steel;
the cooling device comprises a first gooseneck cooling pipe, a second gooseneck cooling pipe, a third gooseneck cooling pipe and a fourth gooseneck cooling pipe which are arranged on the workbench, wherein the first gooseneck cooling pipe is sprayed on the surface S where the point A1 of the drill steel is located at an incident angle thetaA1At a first water velocity v1Controlling the temperature T of the drill steel A1 point1The second gooseneck cooling pipe is sprayed on the surface S of the point A2 of the drill steel at an incident angle thetaA2At a second water flow velocity v2Controlling the temperature T of the drill steel A2 point2The third gooseneck cooling pipe is sprayed on the surface S of the point A3 of the drill steel at an incident angle thetaA3At a third water flow velocity v3Controlling the temperature T of the drill steel A3 point3The fourth gooseneck cooling pipe is sprayed on the surface S of the point A4 of the drill steel at an incident angle thetaA4At a fourth water flow velocity v4Controlling the temperature T of the drill steel A4 point4；
The feedback device comprises a control line, a calculation module and a feedback line, two ends of the control line are respectively connected with the automatic control valve of the cooling device and the calculation module, two ends of the feedback line are respectively connected with the temperature measurement camera and the calculation module, and the temperature of the drill steel is adjusted to be the control temperature through real-time adjustment of the water flow speed.
Preferably, the temperature measuring cameras are distributed in bilateral symmetry, 8 temperature measuring cameras are set as one group, and three groups are arranged along the axial direction of the drill steel; the first gooseneck cooling pipe, the second gooseneck cooling pipe, the third gooseneck cooling pipe and the fourth gooseneck cooling pipe are symmetrically distributed in the left-right direction of the combination of the automatic control valves respectively installed on the gooseneck cooling pipes, 8 of the automatic control valves are set as a group, and three groups of the automatic control valves are installed along the axial direction of the drill steel.
Preferably, the first water flow velocity v1Second water flow velocity v2And the third water flow velocity v3Fourth water flow velocity v4And the incident angle theta can be regulated and controlled.
Preferably, the air-cooled dryer is provided on the base through a support plate and a rib.
Preferably, a diversion cone is installed at a position 1-2 mm below the drill steel, a water storage tank is arranged below the diversion cone, a drain hole is formed in one side of the water storage tank and connected with a drain pipe, and the wastewater pool is installed below the drain pipe; the cooling water of all the gooseneck cooling pipes is supplied by a water conveying pipe, the first end of the water conveying pipe is connected with a water pump, and the second end of the water conveying pipe is connected with the gooseneck cooling pipes.
In another aspect, the present invention provides a cooling method for the aforementioned brazing steel cooling system, the cooling method comprising the steps of:
s1, positioning the drill steel to a preset position through a positioning device, and adjusting the incident angle theta of the gooseneck cooling pipe to enable the sputtering amount of the cooling water to be minimum;
s2, adjusting the height of the propulsion device through the lifting of the telescopic column to realize the positioning of the positioning column and the drill steel inner hole, screwing the butterfly nut, starting the propulsion device, pushing the drill steel to move forward, and keeping the drill steel at the initial temperature;
s3, simultaneously starting the temperature measuring device, the cooling device and the feedback device to cool the drill steel, and setting the control temperature T0Setting the given single increasing speed delta v to be 0.1m/s and setting the error e to be 5 ℃;
s4, cooling the first group of cooling devices in the cooling devices with initial water flow velocity v1Set to 7m/s, v2Set at 6.5m/s, v3Set to 6m/s and v4Set at 2.5m/s, the drill steel passesAfter the first group of cooling devices are cooled, the temperature is increased back to the first self-tempering temperature due to the first self-tempering;
s5, cooling the second group of cooling devices in the cooling devices with the initial water flow velocity v1、v2、v3And v4Respectively setting the temperature to be 5m/s, 4.5m/s, 4m/s and 1.5m/s in sequence, and after the drill steel is cooled by the second group of cooling devices, the temperature is increased back to the second self-tempering temperature due to the second self-tempering;
s6, cooling the third group of cooling devices in the cooling devices by the initial water flow velocity v1、v2、v3And v4Respectively and sequentially setting the temperature to 3m/s, 2.5m/s, 2m/s and 0.5m/s, after passing through the third group of cooling devices, the self-tempering phenomenon can be ignored, and the temperature of the drill steel reaches the control temperature;
and S7, starting the air cooling device, cooling the brazing steel to room temperature, and blowing away water mist on the surface of the brazing steel to finish cooling the brazing steel.
The cooling method of the present invention further comprises the step of setting the control temperature T0Single increment speed Δ v and error e, input AiPoint initial water velocity viDetecting A by a temperature measuring cameraiTemperature T of pointiJudging | Ti－T0The size of | and e, if | Ti－T0If | is greater than e, increasing the flow rate of delta v through the automatic control valve, and continuously detecting AiTemperature T of pointiJudging | Ti－T0The size of | and e, enter the loop when | Ti－T0Stopping circulation when | < e, and outputting final water flow velocity vi', wherein i takes on the values 1,2,3,4, so as to obtain the final cooling water flow rate v1′、v2′、v3' and v4′。
Compared with the prior art, the invention can obtain the following beneficial effects:
1. the invention realizes the accurate control of the temperature of each point at the edge through the feedback system, and solves the problem of uneven cooling at the edge of the polygonal drill steel.
2. The feedback system of the invention acts on the first node, the second node, the third node and the fourth node respectively, accurately controls the water flow, realizes accurate water control and reduces the water consumption.
3. In order to avoid that the temperature of the surface of the drill steel is increased again due to the self-tempering phenomenon of the drill steel, so that the actual cooling temperature of the drill steel cannot reach the control temperature, the feedback systems are uniformly distributed in three groups along the axial direction of the drill steel, so that the real-time cooling temperature of the drill steel is controllable.
Drawings
FIG. 1 is a schematic perspective view of a brazing steel cooling system according to the present invention;
FIG. 2 is a perspective view of a propulsion system for the drill steel cooling system of the present invention;
FIG. 3 is a schematic plan view of the positioning and temperature measuring device of the present invention;
FIG. 4 is a schematic plan view of the cooling apparatus of the present invention;
FIG. 5 is a perspective view of the feedback device of the present invention;
FIG. 6 is a schematic plan view of the cooling water flow rate of the present invention;
FIG. 7 is a feedback control flow diagram of the present invention; and
FIG. 8 is a general flow chart of the method of cooling the brazing steel of the present invention.
Reference numerals: 1-base, 2-ribbed plate, 3-support plate, 4-air-cooled dryer, 5-control line, 6-feedback line, 7-computing module, 8-propulsion guide rod, 9-guide rail, 10-motor, 11-butterfly nut, 12-shrink cylinder, 13-telescopic column, 14-positioning column, 15-workbench, 16-temperature measuring flat plate, 17-brazing steel A4 point temperature measuring camera, 18-brazing steel A3 point temperature measuring camera, 19-brazing steel A2 point temperature measuring camera, 20-brazing steel A1 point temperature measuring camera, 21-nut, 22-positioning chute, 23-threaded pipe, 24-first connecting rod, 25-second connecting rod, 26-trapezoidal plate, 27-positioning plate, 28-brazing steel, 29-water pump, 30-a water conveying pipe, 31-a fourth gooseneck cooling pipe, 32-a third gooseneck cooling pipe, 33-a second gooseneck cooling pipe, 34-a first gooseneck cooling pipe, 35-an automatic control valve, 36-a diversion cone, 37-a water storage tank, 38-a water discharge hole, 39-a water discharge pipe and 40-a wastewater disposal basin.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 shows a schematic view of a cooling system for a brazing steel according to the present invention. The drill steel cooling system comprises a base, a workbench, an air cooling device, a propelling device, a positioning device, a temperature measuring device, a cooling device and a feedback device.
The air cooling device comprises an air cooling dryer 4 arranged at the first end of the base 1, and the air cooling dryer 4 is fixed at the outlet end of the base 1 close to the drill steel 28 after being cooled by the support plate 3 and the ribbed plates 2 fixedly connected with the support plate.
As shown in fig. 2, which is a schematic perspective view of the propulsion apparatus of this embodiment, a guide rail 9 is installed on a base 1 through a retraction cylinder 12 and a retraction column 13, a propulsion guide rod 8 is installed on the guide rail 9, a positioning column 14 is installed at the front end of the propulsion guide rod 8, and a motor 10 for driving the propulsion guide rod 8 to move is installed on the guide rail 9; the telescopic column 13 is arranged in the contraction cylinder 12, the butterfly nut 11 is arranged on the side face of the contraction cylinder 12 and used for fixing the telescopic column 13, the telescopic column 13 can move up and down in the contraction cylinder 12 so as to adjust the height of the propulsion device, and the positioning column 14 can extend into the drill steel hole to radially position the drill steel 28.
As shown in fig. 3, which is a schematic plan view of the positioning and temperature measuring device of the present invention, the positioning chute 22 is disposed on the surface of the worktable 15, the positioning chute 22 is provided with two left and right positioning plates 27, the trapezoidal plate 26 and the positioning plates 27 are connected by two left and right first connecting rods 24 and two left and right second connecting rods 25, the threaded pipe 23 is fixedly connected below the trapezoidal plate 26, the threaded pipe 23 traverses the worktable 15, and the nut 21 is screwed on the threaded pipe 23 below the worktable 15. The positioning devices are respectively arranged in a group at the front side and the rear side of the workbench 15, the threaded pipe 23 and the trapezoidal plate 26 can move up and down through the rotation of the nut 21, the trapezoidal plate 26 moves to drive the first connecting rod 24 and the second connecting rod 25 to rotate, and the first connecting rod 24 and the second connecting rod 25 rotate to drive the two positioning plates 27 to clamp and release, so that the positioning of the drill steel 28 is realized.
A plurality of temperature measuring cameras are arranged on the temperature measuring flat plate 16 at intervals, and the temperature measuring flat plate 16 is fixed on the workbench 15. The drill steel comprises a drill steel A1 point, a drill steel A2 point, a drill steel A3 point and a drill steel A4 point which sequentially form the top point of the outer circumference of the drill steel. Drill steel A1 point temperature measurement cameraThe head 20 observes the temperature T at the A1 point of the drill steel1The temperature measuring camera 19 at the point A2 of the drill steel observes the temperature T at the point A2 of the drill steel2The temperature measuring camera 18 at the point A3 of the drill steel observes the temperature T at the point A3 of the drill steel3The temperature measuring camera 17 at the point A4 of the drill steel observes the temperature T at the point A4 of the drill steel4. The temperature measurement cameras are distributed in a bilateral symmetry mode, 8 temperature measurement cameras are set as a group, three groups are installed along the axial direction of the drill steel, and the number of the temperature measurement cameras can be adjusted according to actual conditions.
Referring to FIG. 4, which is a schematic plan view of the cooling apparatus of the present invention, the automatic control valve 35 is installed on the gooseneck cooling pipes installed on the worktable 15, and the water velocity v of the first gooseneck cooling pipe 341Controlling the temperature T of the drill steel A1 point1The water velocity v of the second gooseneck cooling pipe 332Controlling the temperature T of the drill steel A2 point2The water velocity v of the third gooseneck cooling pipe 323Controlling the temperature T of the drill steel A3 point3The water velocity v of the fourth gooseneck cooling pipe 314Controlling the temperature T of the drill steel A4 point4The gooseneck cooling pipes and the automatic control valves 35 are symmetrically distributed in the left-right direction, 8 gooseneck cooling pipes and the automatic control valves are arranged into a group, three groups are installed along the axial direction of the drill steel 28, and the number of the groups can be adjusted according to actual conditions.
The first end of a water conveying pipe 30 is connected with a water pump 29, the second end of the water conveying pipe 30 is connected with gooseneck cooling pipes, cooling water of all the gooseneck cooling pipes is supplied by the water conveying pipe 30, a guide cone 36 is installed at a position 1-2 mm below a drill steel 28, a water storage tank 37 is formed below the guide cone 36, a water drainage hole 38 is formed in the left side of the water storage tank 37 in a communicated mode, the left side of the water drainage hole 38 is connected with a water drainage pipe 39, a waste water tank 40 is installed below the water drainage pipe 39, in order to avoid interference between a temperature measurement camera in a temperature measurement device and the gooseneck cooling pipes in the cooling device, dislocation of about 1mm can occur when the temperature measurement camera and the gooseneck cooling pipes are axially arranged, the cooling water is pumped into the water conveying pipe 30 through the water pump 29, the water conveying pipe 30 conveys the cooling water intoiWherein i is 1,2,3,4, cooling water flows through the surface of the brazing steel 28, flows into the water storage tank 37 along the guide cone 36, and water in the water storage tank 37 is discharged into a wastewater pool 40 through a water discharge hole 38 and a water discharge pipe 39.
Fig. 5 is a perspective view of the feedback device of the present invention. The two ends of the control line 5 are respectively connected with the automatic control valve 35 and the calculation module 7, the two ends of the feedback line 6 are respectively connected with the temperature measuring cameras and the calculation module 7, wherein the control line 5 and the feedback line 6 are in a schematic drawing method, practically, the control line 5 is connected with all the automatic control valves, and the feedback line 6 is connected with all the temperature measuring cameras.
Fig. 6 is a plan view of the cooling water flow rate of the present invention. The feedback means may control the flow rate v of the cooling water in the automatic control valve 35iWherein i takes on values of 1,2,3,4, thereby controlling the temperature T at the point iiThe size of (2) make 4 point temperature even in certain error range, in the cooling process, because the brazing steel 28 surface can produce one deck water smoke, if cooling water vertical incidence, can lead to a large amount of cooling water because the separation of water smoke and production sputter, cause the waste of water resource, consequently adjust incident angle theta through the crooked degree of adjustment gooseneck cooling tube, reduce the sputter volume of cooling water. The first gooseneck cooling tube 34 is sprayed at an incident angle theta onto a surface S of the drill steel A1 at pointA1At a first water velocity v1Controlling the temperature T of the drill steel A1 point1The second gooseneck cooling pipe 33 is sprayed on the surface S of the brazing steel A2 at an incident angle thetaA2At a second water flow velocity v2Controlling the temperature T of the drill steel A2 point2The third gooseneck cooling tube 32 is sprayed at an angle of incidence theta onto the surface S of the brazing steel A3 at point AA3At a third water flow velocity v3Controlling the temperature T of the drill steel A3 point3The fourth gooseneck cooling pipe 31 is sprayed on the surface S of the brazing steel A4 at the incident angle thetaA4At a fourth water flow velocity v4Controlling the temperature T of the drill steel A4 point4；
As shown in FIG. 7, which is a flowchart of the feedback control of this embodiment, the control temperature T is first set0The single increment speed Deltav and the error e are set as 1, and A is inputiPoint initial water velocity viDetecting A by a temperature measuring cameraiTemperature T of pointiJudging | Ti－T0The size of | and e, if | Ti－T0If | is greater than e, the flow of Δ v is increased by the automatic control valveQuickly, continue to detect AiTemperature T of pointiJudging | Ti－T0The size of | and e, enter the loop when | Ti－T0Stopping circulation when | < e, and outputting final water flow velocity viJudging whether the value of i is 4, if not, inputting AiPoint initial water velocity viEntering a cycle, ending the cycle until i has a value of 4, so as to obtain a cooling final water flow rate v1、v2、v3And v4Ending the circulation, setting the value of the delta v to be small, and controlling the temperature of four points to be at the control temperature T within a certain error range0The uniform control of the temperature at the edges and corners is realized, and it should be noted that the cooling water at the point A1 of the drill steel has two forms finally, the first part is blocked by water mist and splashes and rebounds, the second part is flowed into the drill steel A2 along the surface of the drill steel to cool the point A2 of the drill steel, the temperature of the cooling water at the second part is increased, the cooling effect is not better than that of the cooling water at the beginning, and the second part of the water also acts on the point A2 of the drill steel, so v is2Relative to v1Will be small, like v1The water flowing through the point A2 also flows through the point A3, the second part of the water flowing through the point A2 also acts on the point A3, so v3Less than v2The point A4 of the drill steel is more special, and is influenced by the cooling water of the first three points and simultaneously acted by two gooseneck cooling pipes on the left and the right, so that v4Ratio v3Much smaller and therefore at the input initial water velocity v1、v2、v3、v4When, according to v1＞v2＞v3＞v4To proceed with.
Fig. 8 is a general flow chart of the present invention, which includes the following steps:
s1, positioning the drill steel 28 to a preset position through a positioning device, and adjusting the incident angle theta of the gooseneck cooling pipe to enable the sputtering amount of the cooling water to be minimum;
s2, adjusting the height of the propulsion device through the lifting of the telescopic column 13, realizing the positioning of the positioning column 14 and the inner hole of the drill steel 28, screwing the butterfly nut 11, starting the propulsion device, pushing the drill steel 28 to move forwards, and at the moment, keeping the drill steel 28 at the initial temperature;
s3, simultaneously starting the temperature measuring device, the cooling device and the feedback device to cool the drill steel 28, and setting the control temperature T0Setting the given single increasing speed delta v to be 0.1m/s and setting the error e to be 5 ℃;
s4, cooling the first group of cooling devices in the cooling devices with initial water flow velocity v1Set to 7m/s, v2Set at 6.5m/s, v3Set to 6m/s and v4Set to 2.5m/s, the temperature of the drill steel 28 after cooling by the first set of cooling means is brought back to the first self-tempering temperature due to the first self-tempering;
s5, cooling the second group of cooling devices in the cooling devices with the initial water flow velocity v1、v2、v3And v4Respectively setting the temperature to be 5m/s, 4.5m/s, 4m/s and 1.5m/s in sequence, and raising the temperature of the drill steel 28 to the second self-tempering temperature due to the second self-tempering after the drill steel is cooled by the second group of cooling devices;
s6, cooling the third group of cooling devices in the cooling devices by the initial water flow velocity v1、v2、v3And v43m/s, 2.5m/s, 2m/s and 0.5m/s are respectively set in sequence, after passing through the third group of cooling devices, the self-tempering phenomenon can be ignored, and the temperature of the drill steel 28 reaches the control temperature;
and S7, starting the air cooling device, cooling the brazing steel 28 to room temperature, and blowing away water mist on the surface of the brazing steel to finish cooling the brazing steel 28.
During operation, firstly, the drill steel 28 is positioned to a proper position through the positioning device, the incident angle theta of the gooseneck cooling pipe is adjusted to be 70 degrees to ensure that the sputtering amount of cooling water is minimum, then the height of the propulsion device is adjusted through the lifting of the telescopic column 13 to realize the positioning of the positioning column 14 and the inner hole of the drill steel 28, the butterfly nut 11 is screwed, the propulsion device is started to push the drill steel 28 to move forwards, the temperature of the drill steel 28 is 900-1000 ℃, and meanwhile, the temperature measuring device, the cooling device and the feedback device are started to cool the drill steel 28, and the temperature T is controlled0Set at 200 ℃, given a single increase speed Δ v of 0.1m/s, error e set at 5 ℃, initial water flow velocity v for cooling the first set of cooling devices1Set to 7m/s, v2Set at 6.5m/s, v3Set to 6m/s and v4Setting the temperature to be 2.5m/s, after the drill steel is cooled by the first group of cooling devices, the temperature is increased back to about 500 ℃ of the first self-tempering temperature due to self-tempering, and the initial water flow velocity v is cooled by the second group of cooling devices1、v2、v3And v4Respectively setting the temperature to be 5m/s, 4.5m/s, 4m/s and 1.5m/s in sequence, and raising the temperature of the drill steel to about 300 ℃ for the second self-tempering after the drill steel is cooled by a second group of cooling devices; cooling the third set of cooling devices with an initial water flow velocity v1、v2、v3And v4Respectively and sequentially setting the temperature to be 3m/s, 2.5m/s, 2m/s and 0.5m/s, neglecting the self-tempering phenomenon after passing through the third group of cooling devices, controlling the temperature to be 200 +/-5 ℃ when the drill steel 28 moves out of the water cooling range, starting the air cooling device, cooling the drill steel to about 20 ℃ and blowing away surface water mist to prevent corrosion, and finishing the cooling of the drill steel 28 after water cooling and air cooling.
In the propelling device, the telescopic column 13 can move up and down in the contraction cylinder 12, the telescopic column 13 is positioned by screwing the butterfly nut 11, so that the height of the propelling device is adjusted, the motor 10 can control the propelling guide rod 9 to slide back and forth, so that the axial sliding of the drill steel 28 is realized, and the positioning column 14 can extend into a drill steel hole to radially position the drill steel 28; in the positioning device, the threaded pipe 23 and the trapezoidal plate 26 can move up and down through the rotation of the nut 21, the movement of the trapezoidal plate 26 drives the first connecting rod 24 and the second connecting rod 25 to rotate, and the rotation of the first connecting rod 24 and the second connecting rod 25 drives the positioning plate 27 to clamp and release, so that the positioning of the drill steel 28 is realized; in order to avoid interference between a temperature measuring camera in the temperature measuring device and a gooseneck cooling pipe in the cooling device, the position of the temperature measuring camera and the gooseneck cooling pipe is about 1mm when the temperature measuring camera and the gooseneck cooling pipe are axially arranged; in the cooling device, cooling water is pumped into a water pipe 30 by a water pump 29, the water pipe 30 sends the cooling water to each gooseneck cooling pipe, and the flow rate v of the cooling water is controlled by an automatic control valve 35iI is 1,2,3,4, cooling water flows through the surface of the drill steel 28 and flows into the water storage tank 37 along the guide cone 36, and water in the water storage tank 37 is discharged into the water storage tank 37 through the water discharge hole 38 and the water discharge pipe 39In a wastewater basin 40.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims (7)

1. A drill steel cooling system characterized by: which comprises a base, a workbench, an air cooling device, a propelling device, a positioning device, a temperature measuring device, a cooling device and a feedback device,
the air cooling device comprises an air cooling dryer arranged at the first end of the base;
the propelling device comprises a propelling guide rod, a guide rail, a motor, a butterfly nut, a retracting cylinder, a telescopic column and a positioning column, wherein the guide rail is arranged on the base through the retracting cylinder and the telescopic column; the telescopic column is arranged in the contraction barrel, and the butterfly nut is arranged on the side surface of the contraction barrel and used for fixing the telescopic column;
the positioning device comprises a nut, a threaded pipe, a positioning chute, a first connecting rod, a second connecting rod, a trapezoidal plate and positioning plates, wherein the positioning chute is arranged on the surface of the workbench, the two positioning plates are arranged on the positioning chute, the trapezoidal plate is connected with the positioning plates through the first connecting rod and the second connecting rod, the threaded pipe is fixedly connected below the trapezoidal plate, the threaded pipe transversely penetrates through the workbench, and the nut is screwed on the threaded pipe below the workbench;
the temperature measuring device comprises temperature measuring flat plates arranged at two sides of the workbench, and a drill steel A1 point temperature measuring camera, a drill steel A2 point temperature measuring camera, a drill steel A3 point temperature measuring camera and a drill steel A4 point temperature measuring camera which are arranged on the temperature measuring flat plates at intervalsThe temperature measuring camera at the point A1 of the drill steel observes the temperature T at the point A1 of the drill steel1The temperature measuring camera at the point A2 of the drill steel observes the temperature T at the point A2 of the drill steel2The temperature measuring camera at the point A3 of the drill steel observes the temperature T at the point A3 of the drill steel3The temperature measuring camera at the point A4 of the drill steel observes the temperature T at the point A4 of the drill steel4The brazing steel comprises a brazing steel A1 point, a brazing steel A2 point, a brazing steel A3 point and a brazing steel A4 point which sequentially form the top point of the outer circumference of the brazing steel;
the cooling device comprises a first gooseneck cooling pipe, a second gooseneck cooling pipe, a third gooseneck cooling pipe and a fourth gooseneck cooling pipe which are arranged on the workbench, wherein the first gooseneck cooling pipe is sprayed on the surface S where the point A1 of the drill steel is located at an incident angle thetaA1At a first water velocity v1Controlling the temperature T of the drill steel A1 point1The second gooseneck cooling pipe is sprayed on the surface S of the point A2 of the drill steel at an incident angle thetaA2At a second water flow velocity v2Controlling the temperature T of the drill steel A2 point2The third gooseneck cooling pipe is sprayed on the surface S of the point A3 of the drill steel at an incident angle thetaA3At a third water flow velocity v3Controlling the temperature T of the drill steel A3 point3The fourth gooseneck cooling pipe is sprayed on the surface S of the point A4 of the drill steel at an incident angle thetaA4At a fourth water flow velocity v4Controlling the temperature T of the drill steel A4 point4；
The feedback device comprises a control line, a calculation module and a feedback line, two ends of the control line are respectively connected with the automatic control valve of the cooling device and the calculation module, two ends of the feedback line are respectively connected with the temperature measurement camera and the calculation module, and the temperature of the drill steel is adjusted to be the control temperature through real-time adjustment of the water flow speed.
2. The brazing steel cooling system according to claim 1, wherein: the temperature measuring cameras are distributed in bilateral symmetry, 8 temperature measuring cameras are arranged in one group, and three groups are arranged along the axial direction of the drill steel; the first gooseneck cooling pipe, the second gooseneck cooling pipe, the third gooseneck cooling pipe and the fourth gooseneck cooling pipe are symmetrically distributed in the left-right direction of the combination of the automatic control valves respectively installed on the gooseneck cooling pipes, 8 of the automatic control valves are set as a group, and three groups of the automatic control valves are installed along the axial direction of the drill steel.
3. The brazing steel cooling system according to claim 1, wherein: first water velocity v1Second water flow velocity v2And the third water flow velocity v3Fourth water flow velocity v4And the incident angle theta can be regulated and controlled.
4. The brazing steel cooling system according to claim 1, wherein: the air-cooled dryer is arranged on the base through a supporting plate and a ribbed plate.
5. The brazing steel cooling system according to claim 1, wherein: a diversion cone is installed 1-2 mm below the drill steel, a water storage tank is arranged below the diversion cone, a drain hole is formed in one side of the water storage tank and connected with a drain pipe, and a wastewater pool is installed below the drain pipe; the cooling water of all the gooseneck cooling pipes is supplied by a water conveying pipe, the first end of the water conveying pipe is connected with a water pump, and the second end of the water conveying pipe is connected with the gooseneck cooling pipes.
6. A cooling method for a brazing steel cooling system according to any one of claims 1 to 5, characterized in that: which comprises the following steps:
s1, positioning the drill steel to a preset position through a positioning device, and adjusting the incident angle theta of the gooseneck cooling pipe to enable the sputtering amount of the cooling water to be minimum;
s2, adjusting the height of the propulsion device through the lifting of the telescopic column to realize the positioning of the positioning column and the drill steel inner hole, screwing the butterfly nut, starting the propulsion device, pushing the drill steel to move forward, and keeping the drill steel at the initial temperature;
s3, simultaneously starting the temperature measuring device, the cooling device and the feedback device to cool the drill steel, and setting the control temperature T0Setting the given single increasing speed delta v to be 0.1m/s and setting the error e to be 5 ℃;
s4, cooling the first group of cooling devices in the cooling devices with initial water flow velocity v1Set to 7m/s, v2Set at 6.5m/s, v3Set to 6m/s and v4Setting the temperature to be 2.5m/s, and after the drill steel is cooled by the first group of cooling devices, the temperature is increased back to the first self-tempering temperature due to the first self-tempering;
s5, cooling the second group of cooling devices in the cooling devices with the initial water flow velocity v1、v2、v3And v4Respectively setting the temperature to be 5m/s, 4.5m/s, 4m/s and 1.5m/s in sequence, and after the drill steel is cooled by the second group of cooling devices, the temperature is increased back to the second self-tempering temperature due to the second self-tempering;
s6, cooling the third group of cooling devices in the cooling devices by the initial water flow velocity v1、v2、v3And v4Respectively and sequentially setting the temperature to 3m/s, 2.5m/s, 2m/s and 0.5m/s, after passing through the third group of cooling devices, the self-tempering phenomenon can be ignored, and the temperature of the drill steel reaches the control temperature; and
and S7, starting the air cooling device, cooling the brazing steel to room temperature, and blowing away water mist on the surface of the brazing steel to finish cooling the brazing steel.
7. The cooling method according to claim 6, characterized in that: firstly, a control temperature T is given0Single increment speed Δ v and error e, input AiPoint initial water velocity viDetecting A by a temperature measuring cameraiTemperature T of pointiJudging | Ti－T0The size of | and e, if | Ti－T0If | is greater than e, increasing the flow rate of delta v through the automatic control valve, and continuously detecting AiTemperature T of pointiJudging | Ti－T0The size of | and e, enter the loop when | Ti－T0Stopping circulation when | < e, and outputting final water flow velocity vi', wherein i takes on the values 1,2,3,4, so as to obtain the final cooling water flow rate v1′、v2′、v3' and v4′。
CN202010247438.5A 2020-03-31 2020-03-31 Drill steel cooling system and cooling method thereof Active CN111426205B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1076308A (en) * 1996-09-03 1998-03-24 Nkk Corp Device for cooling wide flange shape
JPH10192946A (en) * 1997-01-17 1998-07-28 Nkk Corp Cooling equipment of steel plate of high temperature
JPH11293342A (en) * 1998-04-10 1999-10-26 Nippon Steel Corp Cooling of continuously cast slab
CN102109391A (en) * 2009-12-23 2011-06-29 宝山钢铁股份有限公司 Synchronous temperature measuring instrument and temperature measuring method for lower surface of strip steel
CN108746210A (en) * 2018-07-12 2018-11-06 江苏常宝普莱森钢管有限公司 A kind of cooling process method and its device of plug
CN110438306A (en) * 2019-08-23 2019-11-12 安徽品冠管业有限公司 Steel pipe fast cooling device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1076308A (en) * 1996-09-03 1998-03-24 Nkk Corp Device for cooling wide flange shape
JPH10192946A (en) * 1997-01-17 1998-07-28 Nkk Corp Cooling equipment of steel plate of high temperature
JPH11293342A (en) * 1998-04-10 1999-10-26 Nippon Steel Corp Cooling of continuously cast slab
CN102109391A (en) * 2009-12-23 2011-06-29 宝山钢铁股份有限公司 Synchronous temperature measuring instrument and temperature measuring method for lower surface of strip steel
CN108746210A (en) * 2018-07-12 2018-11-06 江苏常宝普莱森钢管有限公司 A kind of cooling process method and its device of plug
CN110438306A (en) * 2019-08-23 2019-11-12 安徽品冠管业有限公司 Steel pipe fast cooling device

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