CN214572112U - Spray quenching device for supplying cooling liquid by superposing pump and energy accumulator - Google Patents
Spray quenching device for supplying cooling liquid by superposing pump and energy accumulator Download PDFInfo
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- CN214572112U CN214572112U CN202120525869.3U CN202120525869U CN214572112U CN 214572112 U CN214572112 U CN 214572112U CN 202120525869 U CN202120525869 U CN 202120525869U CN 214572112 U CN214572112 U CN 214572112U
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Abstract
The utility model relates to a pump and energy storage ware stack supply coolant liquid spout and quench device contains: a quenching bath, a quenching liquid supply loop and a control loop. A plurality of quenching liquid nozzles are arranged in the quenching tank; the quenching liquid supply circuit comprises: a liquid supply pump, an energy accumulator and a pipeline; the liquid supply pump stores and supplies liquid to the energy accumulator; the control loop includes: a PLC controller, a control valve, a pressure sensor and a temperature sensor; the pressure sensor is arranged in the energy accumulator to measure that the pressure reaches a set value, and the PLC instructs the water storage pump to stop supplying liquid; the temperature sensors are arranged in different areas of a quenching steel piece measured in the quenching tank at a cooling speed C curve, and the PLC instructs the liquid supply pump to supply liquid to the quenching liquid spray head independently or together with the energy accumulator, so that the conversion of super-cooled austenite into martensite in the spray quenching process can be ensured, and the deformation and cracking of the quenching steel piece are not caused. The utility model has the advantages of reasonable design, simple structure, small power configuration, high intelligent degree, flexible regulation and control of cooling speed, good heat treatment quality and the like.
Description
Technical Field
The utility model relates to a heat treatment quenching equipment especially relates to a pump and energy storage ware stack supply coolant liquid spout and quench device, belongs to heat treatment equipment technical field.
Background
The quenching of steel is a heat treatment process which heats a steel piece to a set temperature, keeps the temperature for a certain time, and then rapidly cools down to obtain high performance. In order to obtain the desired cooling rate during quenching of the steel, the appropriate quench media must be selected to ensure that the austenite transforms to martensite without causing deformation and cracking of the quenched component. It can be known from the C curve that different cooling media should meet the following requirements in the cooling process, and at the temperature of above 650 ℃, because the super-cooled austenite is stable, the cooling speed can be slower, so as to reduce the thermal stress caused by the temperature difference between the inside and the outside of the part and prevent the deformation. But the cooling speed can not be too slow, otherwise, the undercooled austenite is transformed into a pearlite structure and cannot achieve the quenching purpose. At the temperature of 650-500 ℃, because the super-cooled austenite is very unstable, especially the curve of C curve is more unstable, the super-cooled austenite is rapidly cooled in the temperature range to be higher than the critical cooling speed of the steel, so that the super-cooled austenite can be converted into martensite in the cooling process below Ms point; at 300-200 ℃, the super-cooled austenite enters a martensite transformation zone, and the super-cooled austenite is required to be slowly cooled. If the cooling speed is too high, the temperature difference between the inside and the outside of the part is increased, so that the martensite transformation cannot be carried out simultaneously, the volume difference is generated, and the structure stress is generated.
In summary, no quench liquid meeting the above ideal cooling rate has been found in the production practice so far. In particular, workpieces to be processed in production are various, and the requirements of different workpieces on the cooling characteristic of the quenching medium are possibly compatible, namely the same quenching medium can be used; but may also be incompatible, i.e., no compatible quench media can be found. In particular to a water spray cooling quenching process, constant water flow continuous spraying is mostly adopted at present, the cooling water quantity is large, the electric energy consumption is large, and the requirement of ideal cooling speed can not be met. Therefore, it is at least not currently possible to seek "an ideal quench medium that can simultaneously meet the different requirements of all the different workpieces.
However, whether to pass through the C curve as a theoretical basis, and to adopt other physical means to meet or approach the ideal quenching cooling speed as much as possible is a subject to be studied and researched by those skilled in the art.
Disclosure of Invention
Aiming at the current situation that the quenching cooling liquid for heat treatment can not satisfy the ideal cooling speed, the utility model provides a spray quenching device for supplying cooling liquid by superposing a pump and an energy accumulator, which adopts intelligent control to realize that the pump and the energy accumulator can simultaneously or respectively supply quenching liquid, and achieves the purposes of adjustable quenching cooling speed, improved quenching quality, reduced equipment investment and energy conservation.
The utility model discloses a following technical scheme implements, a pump and energy storage ware stack supply coolant liquid spout and quench device contains: the quenching device comprises a quenching bath, a quenching liquid supply loop and a control loop, wherein a plurality of quenching liquid spray heads are arranged in the quenching bath, the quenching liquid supply loop consists of a circulating cooling loop and a water storage and supply loop, and the circulating cooling loop comprises: circulating pump, circulating line and cooler, the circulating pump with in the water suction in the quenching bath circulating line and send into cool off in the cooler, its characterized in that:
the water-storing and liquid-supplying circuit comprises: the system comprises a liquid supply pump, a water storage pipeline, an energy accumulator, a pump supply pipeline and a storage supply pipeline;
a liquid inlet of the liquid supply pump is communicated with a cooler in the circulating cooling loop, and a liquid outlet of the liquid supply pump is respectively communicated with a water storage pipeline and a pump supply pipeline; the water storage pipeline is communicated with a liquid inlet of the energy accumulator; a liquid outlet of the energy accumulator is communicated with a plurality of quenching liquid nozzles arranged in the quenching bath through a storage and supply pipeline, and the pump supply pipeline is communicated with the storage and supply pipeline;
in some embodiments, the plurality of quenching liquid nozzles are divided into two groups, wherein one group is communicated with the liquid supply pump through the pump supply pipeline, and the other group is communicated with the energy accumulator through the storage supply pipeline.
Furthermore, after the plurality of quenching liquid spray heads are divided into two groups, each spray head in one group of quenching liquid spray heads and each spray head in the other group of quenching liquid spray heads are arranged in a staggered mode at equal intervals.
The control loop includes: the PLC comprises a PLC programmable controller, a control valve, a pressure sensor and a temperature sensor;
the PLC, the control valve, the pressure sensor, the temperature sensor and the liquid supply pump are electrically connected;
the three control valves are respectively arranged on the water storage pipeline, the pump supply pipeline and the storage and supply pipeline;
the pressure sensor is arranged in the energy accumulator and transmits pressure information in the energy accumulator to the PLC, and the PLC instructs the liquid supply pump to start and stop according to the pressure information in the energy accumulator;
the temperature sensor is arranged in the quenching tank and transmits the temperature information of the quenching workpiece to the PLC, and the PLC instructs the three control valves to be opened and closed respectively according to the temperature information in the energy accumulator.
When the quenching steel piece is in a supercooled austenite stable region, the PLC instructs the liquid feed pump to independently feed the quenching liquid to the quenching liquid spray head, so as to reduce the spraying amount of the quenching liquid, slow down the cooling speed and reduce the thermal stress deformation of the quenching steel piece caused by the internal and external temperature difference; when the temperature sensor detects that the temperature of the quenching workpiece enters a supercooled austenite unstable region, the PLC instructs the liquid supply pump and the energy accumulator to simultaneously superpose a quenching liquid spray head for supplying quenching liquid, so that the supercooled austenite is rapidly cooled and is rapidly transformed into martensite at a speed higher than the critical cooling speed of the steel; when the temperature sensor detects that the temperature of the quenched steel part enters a martensite transformation area, the PLC instructs the energy accumulator to stop supplying quenching liquid to the quenching liquid spray head, and instructs the liquid supply pump to supply the quenching liquid to the quenching liquid spray head, so that the aim of slowly cooling is fulfilled, the temperature difference between the inside and the outside of the quenched steel part is reduced, and the cracking deformation is avoided. And then, the liquid supply pump and the energy accumulator simultaneously supply the quenching liquid to the quenching liquid spray head, and the requirement of rapid cooling of the quenched steel part in the supercooled austenite unstable region can be met under the condition of no configuration of a high-power pump.
The utility model has the advantages of reasonable design, simple structure, small power configuration, high intelligent degree, flexible cold speed regulation, good heat treatment quality, low operation cost and the like.
Drawings
FIG. 1 is a schematic view of the main sectional structure of the present invention;
FIG. 2 is a schematic structural diagram of a cross-sectional view A-A of FIG. 1 according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a cross-sectional view a-a of embodiment two of the present invention shown in fig. 1.
In the accompanying figures 1, 2 and 3: 1 is a quenching bath, 2 is a temperature sensor, 3 is a quenching steel part, 4 is a group of quenching liquid spray heads, 4 ' is two groups of quenching liquid spray heads, 5 is a liquid supply pump, 5 ' is a circulating pump, 6 ' are control valves, 7 is an energy accumulator, 8 is a pressure sensor, 9 is a cooler, a is a circulating pipeline, b is a water storage pipeline, c is a pump supply pipeline, and d is a storage supply pipeline.
Detailed Description
The invention will be further explained by means of two embodiments with reference to the drawings, in which:
the first embodiment is as follows: as shown in attached figures 1 and 2, a group of quenching liquid spray heads 4 are arranged in a quenching bath 1, and a circulating pump 5' pumps water in the quenching bath 1 into a circulating pipeline a and sends the water into a cooler 9 for cooling; a liquid inlet of the liquid supply pump 5 is communicated with the cooler 9, and a liquid outlet is respectively communicated with the water storage pipeline a and the liquid supply pipeline c; the water storage pipeline a is communicated with a liquid inlet of the energy accumulator 7; the liquid supply pipeline c is communicated with a group of quenching liquid spray heads 4 arranged in the quenching bath 1; the liquid outlet of the energy accumulator 7 is communicated with the liquid supply pipeline c; a control valve 6 is arranged on the water storage pipeline b, a control valve 6 'is arranged on the liquid supply pipeline c, and a control valve 6' is arranged on a pipeline for communicating the liquid outlet of the energy accumulator 7 with the liquid supply pipeline b; a pressure sensor 8 is arranged in the energy accumulator 7; a temperature sensor 2 is arranged in the quenching tank 1; the PLC programmable controller (not shown in the figure) is electrically connected with the control valves 6, 6', the pressure sensor 8, the temperature sensor 2 and the liquid supply pump 5.
Example two: as shown in the attached fig. 1 and 3, a group of quenching liquid spray heads 4 and two groups of quenching liquid spray heads 4 ' are arranged in the quenching bath 1, wherein one group of quenching liquid spray heads 4 is communicated with a liquid supply pump 5 through a liquid supply pipeline c, the two groups of quenching liquid spray heads 4 ' are communicated with a liquid outlet of an energy accumulator 7 through a liquid storage and supply pipeline d, and each spray head of one group of quenching liquid spray heads 4 is staggered with each spray head of the two groups of quenching liquid spray heads 4 '; the liquid supply pipeline c is provided with a control valve 6 ', and the storage and supply pipeline d is provided with a control valve 6'; a pressure sensor 8 is arranged in the energy accumulator 7; a temperature sensor 2 is arranged in the quenching tank 1; the PLC programmable controller (not shown in the figure) is electrically connected with the control valves 6, 6', the pressure sensor 8, the temperature sensor 2 and the liquid supply pump 5.
The control method of the spray quenching device in the first embodiment comprises the following steps:
firstly, the PLC instructs the control valve 6 to open, the control valve 6 'and the control valve 6' to close, and simultaneously instructs the liquid feed pump 5 to feed quenching liquid to the energy accumulator 7, the pressure sensor 8 detects that the pressure in the energy accumulator 7 reaches a set value, the PLC instructs the liquid feed pump 5 to stop feeding the energy accumulator 7 with the quenching liquid, and the control valve 6 is closed;
the time horizontal coordinate of the turning point of the cooling speed C curve of the quenching steel part 3 is s, the temperature vertical coordinate is t,
the method comprises the following steps: heating the quenched steel part 3 to a set temperature and then preserving heat for a certain time;
step two: taking out the quenched steel part 3 and suspending the quenched steel part in the spray quenching tank 1;
step three: the PLC commands the control valve 6 'to open and the control valve 6' to close, the liquid supply pump 5 independently supplies the quenching liquid to a group of quenching liquid spray heads 4, the group of quenching liquid spray heads 4 carries out spray quenching cooling on the quenching steel piece 3 in the super-cooled austenite stable region, and the spray quenching time is s1Cooling to temperature t1And s is1＜s、t1T, water spraying quantity is Q1；
Step four: when the temperature of the quenched steel part 3 measured by the temperature sensor 2 reaches the region where the super-cooled austenite is unstable, the PLC instruction control valve 6' is opened, the liquid supply pump 5 and the energy accumulator 7 simultaneously supply quenching liquid to the group of quenching liquid spray heads 4 in an overlapping manner, the group of quenching liquid spray heads 4 spray and quench the quenched steel part 3 in the region where the super-cooled austenite is unstable, and the spraying and quenching time is s1To s2Cooling temperature from t1To t2And s at the C curve turning point1-2S, water injection quantity is Q2；
Step five: the temperature sensor detects that the temperature of the quenching steel part 3 enters a martensite transformation area, the PLC instructs the control valve 6' to close, the energy accumulator 7 stops supplying the quenching liquid to the quenching liquid spray heads, the liquid supply pump 5 independently supplies the quenching liquid to a group of quenching liquid spray heads 4, and the spraying and quenching time is s2To s3Cooling temperature from t2To room temperature s1Water injection quantity is Q3And Q3 < Q1.
The control method of the spray quenching device of the second embodiment comprises the following steps:
the first step, the second step, the third step and the fifth step are the same as the first step, the second step, the third step and the fifth step in the first embodiment;
step four: when the temperature of the quenching steel piece 3 detected by the temperature sensor 2 reaches the super-cooled austenite unstable region, the PLC instruction control valve 6 ' is opened, the liquid supply pump 5 supplies quenching liquid to one group of quenching liquid spray heads 4, the energy accumulator 7 supplies quenching liquid to two groups of quenching liquid spray heads 4 ', one group of quenching liquid spray heads 4 and two groups of quenching liquid spray heads 4 ' simultaneously spray and quench the quenching steel piece 3 in the super-cooled austenite unstable region, and the spraying and quenching time is s1To s2Cooling temperature from t1To t2And s at the C curve turning point1-2S, water injection quantity is Q2。
Claims (3)
1. A spray quenching device for supplying cooling liquid by superposing a pump and an accumulator comprises: the quenching device comprises a quenching bath, a quenching liquid supply loop and a control loop, wherein a plurality of quenching liquid spray heads are arranged in the quenching bath, the quenching liquid supply loop consists of a circulating cooling loop and a water storage and supply loop, and the circulating cooling loop comprises: circulating pump, circulating line and cooler, the circulating pump with in the water suction in the quenching bath circulating line and send into cool off in the cooler, its characterized in that:
the impounded water supply circuit comprises: the system comprises a liquid supply pump, a water storage pipeline, an energy accumulator, a pump supply pipeline and a storage supply pipeline;
a liquid inlet of the liquid supply pump is communicated with a cooler in the circulating cooling loop, and a liquid outlet of the liquid supply pump is respectively communicated with a water storage pipeline and a pump supply pipeline; the water storage pipeline is communicated with a liquid inlet of the energy accumulator; a liquid outlet of the energy accumulator is communicated with a plurality of quenching liquid nozzles arranged in the quenching bath through a storage and supply pipeline, and the pump supply pipeline is communicated with the storage and supply pipeline;
the control loop includes: the PLC, the control valve, the pressure sensor, the temperature sensor and the liquid supply pump are electrically connected;
the three control valves are respectively arranged on the water storage pipeline, the pump supply pipeline and the storage and supply pipeline;
the pressure sensor is arranged in the energy accumulator and transmits pressure information in the energy accumulator to the PLC, and the PLC instructs the liquid supply pump to start and stop according to the pressure information in the energy accumulator;
the temperature sensor is arranged in the quenching tank and transmits the temperature information of the quenching workpiece to the PLC, and the PLC instructs the three control valves to be opened and closed respectively according to the temperature information in the energy accumulator.
2. The spray quenching device for supplying cooling liquid by superposing the pump and the accumulator as claimed in claim 1, wherein: the plurality of quenching liquid nozzles are divided into two groups, wherein one group is communicated with the liquid supply pump through a pump supply pipeline, and the other group is communicated with the energy accumulator through an energy storage and supply pipeline.
3. The spray quenching device for supplying cooling liquid by superposing the pump and the accumulator as claimed in claim 2, wherein: after the plurality of quenching liquid spray heads are divided into two groups, each spray head in one group of quenching liquid spray heads is staggered with each spray head in the other group of quenching liquid spray heads at equal distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120525869.3U CN214572112U (en) | 2021-03-13 | 2021-03-13 | Spray quenching device for supplying cooling liquid by superposing pump and energy accumulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120525869.3U CN214572112U (en) | 2021-03-13 | 2021-03-13 | Spray quenching device for supplying cooling liquid by superposing pump and energy accumulator |
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| Publication Number | Publication Date |
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| CN214572112U true CN214572112U (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120525869.3U Active CN214572112U (en) | 2021-03-13 | 2021-03-13 | Spray quenching device for supplying cooling liquid by superposing pump and energy accumulator |
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| CN (1) | CN214572112U (en) |
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- 2021-03-13 CN CN202120525869.3U patent/CN214572112U/en active Active
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