CN112877511A - Quenching water tank circulating cooling temperature control system and method - Google Patents
Quenching water tank circulating cooling temperature control system and method Download PDFInfo
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- CN112877511A CN112877511A CN202110039617.4A CN202110039617A CN112877511A CN 112877511 A CN112877511 A CN 112877511A CN 202110039617 A CN202110039617 A CN 202110039617A CN 112877511 A CN112877511 A CN 112877511A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 238000010791 quenching Methods 0.000 title claims abstract description 96
- 230000000171 quenching effect Effects 0.000 title claims abstract description 96
- 238000001816 cooling Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000011152 fibreglass Substances 0.000 claims description 14
- 239000000243 solution Substances 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 239000006104 solid solution Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 6
- 238000010924 continuous production Methods 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 6
- 239000008399 tap water Substances 0.000 description 6
- 235000020679 tap water Nutrition 0.000 description 6
- 239000002699 waste material Substances 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/63—Quenching devices for bath quenching
- C21D1/64—Quenching devices for bath quenching with circulating liquids
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
A quenching water tank circulating cooling temperature control system and a method thereof specifically comprise the following steps: measuring the temperature of the water tank by a thermocouple; starting the circulating system at an over-temperature; starting a cooling tower; the quenching tank liquid is pumped to a cooling tower by a circulating pump, the cooling tower atomizes hot water, and the water temperature is reduced through air exchange; and the cooled water flows back to the quenching tank through a circulating pipeline, so that the temperature of the quenching water is reduced. By adding an external cooling system of the quenching bath solution, the temperature of the quenching water is finally controlled to be 60 +/-5 ℃. Realizes the continuous production process and the recycling of quenching water, saves energy, protects environment, ensures the quality and improves the production efficiency.
Description
Technical Field
The invention relates to a quenching water tank circulating cooling temperature control system and a method, and belongs to the technical field of mechanical manufacturing.
Background
The continuous rod heat treatment line is a highly automated continuous line (shown in figure 1) specifically built for the aluminum alloy T6 process. The production line comprises a feeding and discharging area, a solid solution heating area, a quenching area, a trolley moving area, an aging heating area and the like, and the production process is controlled by a PC program. The process flow is as follows: feeding → solution heating → quenching → transferring → aging → blanking.
The process control required to be achieved is: the solid solution heating temperature is 500-540 ℃, the aging is 150-200 ℃, the temperature control range is +/-5 ℃, the quenching temperature is controlled within the range of 40-75 ℃, and the quenching bath solution is tap water used in a workshop. The quenching transfer time is controlled within 15 seconds. The heating time is set according to the product performance requirement.
The workpiece drives the stick through the motor to move in the furnace, and the moving beat is set by a program. Because the production process is continuously carried out, the water temperature in the quenching tank is continuously increased after the workpieces are quenched, and the water temperature is generally close to the upper limit of the quenching temperature after 5 furnaces of continuous quenching, so that a system alarm is caused. Although the temperature of the quenching tank water can be reduced by manually adding tap water, the temperature is often difficult to realize quickly due to the fact that a large amount of tap water is needed for reducing the temperature, and meanwhile, a large amount of water overflows due to the addition of the tap water and is discharged to a sewer, so that a large amount of waste is caused.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a circulating cooling temperature control system of a quenching water tank, which overcomes the defects in the prior art and needs to redesign a temperature control system of tank liquor in order to better control the temperature of the tank liquor and reduce the waste of tap water.
In order to solve the technical problem, the invention is realized as follows:
a quenching water tank circulating cooling temperature control system comprises a glass fiber reinforced plastic cooling tower, a water return pipe, a water supply pipe, a circulating motor and a quenching tank;
the reinforced cement structure with the quenching tank length of 2900mm 2600mm 3150mm is positioned below the floor of the workshop and at the outlet of the solid solution furnace; the distance from the water supply pipe to the bottom of the quenching tank is 1200mm, and the distance from the water return pipe to the ground plane of the workshop is 400 mm;
the circulating motor is arranged at the bottom of the glass fiber reinforced plastic cooling tower and is connected with the cooling tower through a flange; the water supply pipe is connected with a water inlet flange of the circulating motor through a flange; the water supply pipe consists of a steel pipe with the pipe diameter of 50mm, a valve and a bent pipe, and is connected to the quenching tank from a feed inlet of the aging furnace along the ground of a workshop from the glass fiber reinforced plastic cooling tower and enters the quenching tank;
the water return pipe is connected with a water outlet flange of the glass fiber reinforced plastic cooling tower through a flange and is connected into the quenching tank along the workshop ground and the water supply pipe in parallel;
according to the temperature rise condition of water temperature during quenching, generally, the temperature rise of each quenching is about 5-8 ℃, the process beat is 1 hour, and for this reason, according to the temperature rise and the volume condition of a quenching tank, a 20T/h glass fiber reinforced plastic cooling tower is selected; the cooling tower works for one hour, can realize that the quenching bath solution is completely circulated once, and meets the requirement that the bath solution is cooled once after each quenching;
according to the capacity of the cooling tower, the specification of a circulating water pipe and the power of a circulating motor are configured, so that hot water in the quenching tank is conveyed to the cooling tower, then the cooling tower is used for cooling, the heat of the hot water is released, the temperature is reduced, and the hot water flows back to the quenching tank through a water return pipe, so that one cycle is realized; finally, the water temperature of the quenching tank meets the process requirements.
A quenching water tank circulating cooling temperature control method specifically comprises the following steps:
1 thermocouple measuring water tank temperature
2 over-temperature starting circulation system
3 cooling tower Start
4, pumping the quenching tank liquid to a cooling tower by a circulating pump, atomizing hot water by the cooling tower, and reducing the water temperature through air exchange.
5 the cooled water flows back to the quenching tank through a circulating pipeline to reduce the temperature of the quenching water
The invention has the positive effects that:
1. the temperature of the quenching bath liquid is controlled within the range of 60 +/-5 ℃ by the design of a circulating cooling system.
2. The traditional manual control mode of the temperature of the quenching bath liquid is changed, and automatic control is realized.
3. The non-cyclic utilization of the original quenching bath liquid is changed into cyclic utilization. The resource waste is reduced.
4. Thoroughly improve the cooling mode of continuously adding tap water through manual work, guaranteed the quality of product.
Drawings
FIG. 1 is a plan view of the T6 production line process according to the present invention.
Fig. 2 is a diagram of a circulation cooling system.
Fig. 3 is a flow chart of the circulation cooling.
Fig. 4 is a schematic structural view of the quenching tank. The distance from the water supply pipe to the bottom of the quenching tank is 1200mm, and the distance from the ground plane of a water return pipeline workshop is 400 mm; the distance between the water supply pipe and the water return pipe is 300 mm. 2900mm is the length of the quenching tank, 2600mm is the width, 3150mm is the depth.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-4, an external circulation cooling system for quenching bath solution is designed, and is started when the water temperature reaches a certain temperature, so that the heat brought by workpieces during quenching is released through the external circulation system, and the water temperature is ensured to be within the range of process requirements.
According to the actual situation of a production field, a glass fiber reinforced plastic cooling tower, a circulating water pipe and a circulating motor are arranged outside a workshop, and the quenching tank liquor and the cooling tower are connected to form a circulating cooling system.
A quenching water tank circulation cooling temperature control system specifically comprises: a glass fiber reinforced plastic cooling tower, a circulating water pipe (a water return pipe and a water supply pipe), a circulating motor and a quenching tank.
System structure and connection: the quenching tank is a reinforced cement structure of 2900mm (length) 2600mm (width) 3150mm (depth), is located below the floor of the workshop and at the outlet of the solution furnace. The distance from the water supply pipe to the bottom of the quenching tank is 1200mm, and the distance from the water return pipe to the ground plane of the workshop is 400 mm;
the circulating motor is arranged at the bottom of the glass fiber reinforced plastic cooling tower and is connected with the cooling tower through a flange. The water supply pipe is connected with a water inlet flange of the circulating motor through a flange. The water supply pipe consists of a steel pipe with the pipe diameter of 50mm, a valve and a bent pipe, and is connected from the cooling tower to the quenching tank from the feeding port of the aging furnace along the workshop ground and enters the tank.
The water return pipe is connected with a water outlet flange of the cooling tower through a flange and is connected into the quenching water tank along the workshop ground and the water supply pipe side by side.
According to the temperature rise condition of water temperature during quenching, generally, the temperature rise of each quenching is about 5-8 ℃, the process beat is 1 hour, and for this reason, according to the temperature rise and the volume condition of a quenching tank, a 20T/h glass fiber reinforced plastic cooling tower is selected. The cooling tower works for one hour, can realize that the quenching bath solution is completely circulated once, and meets the requirement that the bath solution is cooled once after each quenching.
According to the capacity of the cooling tower, the specification of the circulating water pipe and the power of the circulating motor are configured, so that hot water in the quenching tank is conveyed to the cooling tower, then the cooling tower is used for cooling, the heat of the hot water is released, the temperature is reduced, and the hot water flows back to the quenching tank through the water return pipe, so that one cycle is realized. Finally, the water temperature of the quenching tank meets the process requirements.
Has the advantages that: by adding an external cooling system of the quenching bath solution, the temperature of the quenching water is finally controlled to be 60 +/-5 ℃. Realizes the continuous production process and the recycling of quenching water, saves energy, protects environment, ensures the quality and improves the production efficiency.
The working principle and the implementation steps are as follows:
step one, starting a system: the water in the quenching tank is manually started when the temperature of the tank liquid rises to 45 ℃ due to the release of heat during the quenching of the quenching workpiece.
And step two, the circulating motor is connected with the quenching tank through two steel pipes with the diameter of 50mm, one for supplying water and the other for returning water. One end of the water supply pipe enters the middle part of the quenching tank, and high-temperature water is sucked into the cooling tower.
And step three, starting a cooling fan of the cooling tower, and enabling the hot water to exchange heat with air under the action of the fan so as to reduce the temperature of the water.
The water supply quantity is realized by adjusting the water quantity of the water supply pipe, the cooling effect of the cooling tower is adjusted, and the effect of effectively reducing the temperature of the tank liquor is achieved.
And step four, guiding the water cooled by the cooling tower into a water return pipe of a circulating motor, and then entering a quenching tank to finish a cooling cycle.
And step five, after the water temperature of the circulating system exceeds 45 ℃, continuously pumping hot water from the quenching tank to the cooling tower through the circulating motor, releasing heat brought by the quenching workpiece, finally realizing heat balance and ensuring that the water temperature is 60 +/-10 ℃ within the process requirement range.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.
Claims (5)
1. A quenching water tank circulating cooling temperature control system is characterized by comprising a glass fiber reinforced plastic cooling tower, a water return pipe, a water supply pipe, a circulating motor and a quenching tank;
the reinforced cement structure with the quenching tank length of 2900mm 2600mm 3150mm is positioned below the floor of the workshop and at the outlet of the solid solution furnace; the distance from the water supply pipe to the bottom of the quenching tank is 1200mm, and the distance from the water return pipe to the ground plane of the workshop is 400 mm;
the circulating motor is arranged at the bottom of the glass fiber reinforced plastic cooling tower and is connected with the cooling tower through a flange; the water supply pipe is connected with a water inlet flange of the circulating motor through a flange; the water supply pipe consists of a steel pipe with the pipe diameter of 50mm, a valve and a bent pipe, and is connected to the quenching tank from a feed inlet of the aging furnace along the ground of a workshop from the glass fiber reinforced plastic cooling tower and enters the quenching tank;
the water return pipe is connected with a water outlet flange of the glass fiber reinforced plastic cooling tower through a flange and is connected into the quenching tank along the workshop ground and the water supply pipe in parallel;
according to the temperature rise condition of water temperature during quenching, generally, the temperature rise of each quenching is about 5-8 ℃, the process beat is 1 hour, and for this reason, according to the temperature rise and the volume condition of a quenching tank, a 20T/h glass fiber reinforced plastic cooling tower is selected; the cooling tower works for one hour, can realize that the quenching bath solution is completely circulated once, and meets the requirement that the bath solution is cooled once after each quenching;
according to the capacity of the cooling tower, the specification of a circulating water pipe and the power of a circulating motor are configured, so that hot water in the quenching tank is conveyed to the cooling tower, then the cooling tower is used for cooling, the heat of the hot water is released, the temperature is reduced, and the hot water flows back to the quenching tank through a water return pipe, so that one cycle is realized; finally, the water temperature of the quenching tank meets the process requirements.
2. The system of claim 1, wherein the cooling tower is of DBNL3-20T type.
3. The system of claim 1, wherein the water return pipe and the water supply pipe are steel pipes with a diameter of 50 mm.
4. The system of claim 1, wherein the power of the circulating motor is 0.75KW.
5. A quenching water tank circulating cooling temperature control system, which is characterized in that,
step one, starting a system: the temperature of the bath solution is increased due to the release of heat during the quenching of the quenching workpiece, and when the temperature of water is increased to 45 ℃, the circulating motor is manually started;
secondly, connecting a circulating motor with a quenching tank through two steel pipes with the diameter of 50mm, and supplying water and returning water one by one; one end of the water supply pipe enters the middle part of the quenching tank, and high-temperature water is sucked into the cooling tower;
step three, starting a cooling fan of the cooling tower, and enabling the hot water to exchange heat with air under the action of the fan so as to reduce the temperature of the water; the water supply quantity is realized by an adjusting valve for adjusting the water quantity of the water supply pipe, the cooling effect of the cooling tower is adjusted, and the effect of reducing the water temperature of the tank liquor is achieved;
step four, guiding the water cooled by the cooling tower into a water return pipe of a circulating motor, and then entering a quenching tank to finish a cooling cycle;
and step five, after the water temperature of the circulating system exceeds 45 ℃, continuously pumping hot water from the quenching tank to the cooling tower through the circulating motor, releasing heat brought by the quenching workpiece, finally realizing heat balance and ensuring that the water temperature is 60 +/-10 ℃ within the process requirement range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110039617.4A CN112877511A (en) | 2021-01-13 | 2021-01-13 | Quenching water tank circulating cooling temperature control system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110039617.4A CN112877511A (en) | 2021-01-13 | 2021-01-13 | Quenching water tank circulating cooling temperature control system and method |
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| Publication Number | Publication Date |
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| CN112877511A true CN112877511A (en) | 2021-06-01 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201665694U (en) * | 2010-03-29 | 2010-12-08 | 江阴润源机械有限公司 | Quenching medium preheating and cooling circulation system |
| CN203200307U (en) * | 2013-04-10 | 2013-09-18 | 江苏亚太安信达铝业有限公司 | Circulating cooling system capable of reducing water temperature in quenching water tank |
| CN204779694U (en) * | 2015-06-07 | 2015-11-18 | 南京维泰新材料科技有限公司 | A quenching media rotation cooling system for quenching treatment |
| CN207891386U (en) * | 2018-01-29 | 2018-09-21 | 苏州佳弟精密五金有限公司 | A kind of quenching tank that temperature is constant |
| US20200102626A1 (en) * | 2018-09-29 | 2020-04-02 | Shanghai Yibai Industrial Furnaces Co., Ltd. | Quenching heat treatment device and on-line intelligent control method for the cooling characteristics of quenching liquid |
-
2021
- 2021-01-13 CN CN202110039617.4A patent/CN112877511A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201665694U (en) * | 2010-03-29 | 2010-12-08 | 江阴润源机械有限公司 | Quenching medium preheating and cooling circulation system |
| CN203200307U (en) * | 2013-04-10 | 2013-09-18 | 江苏亚太安信达铝业有限公司 | Circulating cooling system capable of reducing water temperature in quenching water tank |
| CN204779694U (en) * | 2015-06-07 | 2015-11-18 | 南京维泰新材料科技有限公司 | A quenching media rotation cooling system for quenching treatment |
| CN207891386U (en) * | 2018-01-29 | 2018-09-21 | 苏州佳弟精密五金有限公司 | A kind of quenching tank that temperature is constant |
| US20200102626A1 (en) * | 2018-09-29 | 2020-04-02 | Shanghai Yibai Industrial Furnaces Co., Ltd. | Quenching heat treatment device and on-line intelligent control method for the cooling characteristics of quenching liquid |
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Application publication date: 20210601 |
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