CN204281887U - A kind of cooling water pressure closed loop control system of kyropoulos sapphire crystallization equipment - Google Patents
A kind of cooling water pressure closed loop control system of kyropoulos sapphire crystallization equipment Download PDFInfo
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- CN204281887U CN204281887U CN201420705326.XU CN201420705326U CN204281887U CN 204281887 U CN204281887 U CN 204281887U CN 201420705326 U CN201420705326 U CN 201420705326U CN 204281887 U CN204281887 U CN 204281887U
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- cooling water
- pressure
- flow valve
- plc
- water pressure
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Abstract
The utility model discloses a kind of cooling water pressure closed loop control system of kyropoulos sapphire crystallization equipment, this device comprises pressure transmitter, electronic flow valve, PLC, wherein, pressure transmitter, electronic flow valve and PLC are connected by signal wire and communicate, pressure transmitter is arranged on cooling water outlet mouth position, and electronic flow valve is arranged on coolant intake.Discharge pressure change is transferred to PLC by pressure transmitter, PLC regulate electronic flow valve just can make hydraulic pressure automatically remain on required pressure ± 0.01 MPa degree, thus the closed-loop control of formation cooling water pressure.Utilizing this patent can control within 0.01 MPa making kyropoulos sapphire crystallization component cooling water system Inlet and outlet water pressure change, decreasing the impact of water pressure fluctuations on crystal growing process, improve the quality of crystal growth.
Description
Technical field
This patent relates to kyropoulos sapphire crystal and manufactures field, particularly relates to a kind of cooling water pressure closed loop control system of kyropoulos sapphire crystallization equipment, is applicable to other similar field simultaneously.
Background technology
Sapphire is also known as white stone, that hardness is only second to adamantine crystalline material in the world, owing to having excellent physics, machinery, chemistry and infrared light transmission performance, it is the material that the fields such as microelectronics, aerospace, military project are badly in need of always, especially optical grade large-size sapphire material, because it has stable performance, the huge market demand, comprehensive utilization ratio and added value of product high, become in recent years research and development and industrialization focus both at home and abroad.
The general process of sapphire crystal manufacture is the seed crystal and melt contacts of catching a cold one, if the temperature at interface is lower than zero pour, then seed crystal starts growth, constantly grow up to make crystal, just need the temperature reducing melt gradually, simultaneously rotating crystal, to improve the temperature distribution of melt.Also slowly (or stage by stage) can carry crystal, to expand radiating surface.Crystal does not contact with sidewall of crucible in process of growth or at the end of growth, this greatly reduces the stress of crystal.But, when crystal and remaining melt depart from, usually larger thermal shocking can be produced.Pyrosol top-seeded solution growth conventional is at present improvement and the development of this kyropoulos.
Because thermograde is very little, kyropoulos sapphire crystal growth process is one and temperature-fall period slowly, and the power range of decrease hourly is lower than 50W, and heating power is then up to 50KW.Fluctuation small in process of growth just has an impact to crystal growing process.The factor of power is affected except thermal field in long brilliant equipment, also has water-cooling system, unnecessary caloric requirement is taken away by water-cooled, because the water yield of water-cooling system is very large, generally can reach 6000 ls/h, small hydraulic pressure deviation just means the change of discharge, so the heat that carries of water-cooling system just has considerable change, this will have significant impact to crystal growing process, adopt a kind of device that automatically can control hydraulic pressure extremely important for the crystal of growing high-quality, automatic control process is also highly beneficial for increasing work efficiency for this reason.
Summary of the invention
(1) technical problem that will solve
Main purpose of the present invention is the cooling water pressure force control device providing a kind of kyropoulos sapphire crystallization equipment, suppresses water pressure fluctuations, improves the quality of crystal growth.
(2) technical scheme
For achieving the above object, the invention provides a kind of cooling water pressure closed loop control system of kyropoulos sapphire crystallization equipment, comprise the pressure transmitter being arranged on cooling water outlet mouth, be arranged on the electronic flow valve of coolant intake, carry out central controlled PLC, wherein, described pressure transmitter, electronic flow valve and described PLC are connected by signal wire and communicate.
The precision of described pressure transmitter reaches 0.01 MPa, and having digital interface can carry out digital communication with described PLC.
The sharpness of regulation of described electronic flow valve reaches 1 liter/second, and having digital interface can carry out digital communication with described PLC.
Described PLC inside arranges cooling water pressure automatic control algorithm, and described cooling water pressure automatic control algorithm comprises the following steps:
Step one: the flow of the electronic flow valve described in adjustment is Q, makes described pressure transmitter reach P
0;
Step 2: the pressure transmitter described in detection, obtains discharge pressure P
1, and calculating pressure deviation △ P=P
1-P
0if the absolute value of △ P is greater than 0.01 MPa, then enter step 3;
The flow of the electronic flow valve described in adjustment, regulated quantity △ Q=-S
2△ P/(ρ Q), then return step 2, wherein, S is the sectional area of described coolant intake, and ρ is the density of water coolant.
(3) beneficial effect
As can be seen from technique scheme, the present invention has following beneficial effect: utilize this water pressure of cooling water automatic control device, the cooling water system Inlet and outlet water pressure change of kyropoulos sapphire crystallization equipment can be made to control within 0.01 degree, decrease the impact of water pressure fluctuations on crystal growing process, improve the quality of crystal growth.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of long brilliant equipment;
Fig. 2 is the schema of cooling water pressure automatic control algorithm.
Embodiment
Below in conjunction with specific embodiment, the present invention is further expanded description, but it is pointed out that the present invention's structure required for protection is not limited to the concrete structure in embodiment and Figure of description.For other structure formations that those of ordinary skill in the art can know by inference, also belong within the present invention's scope required for protection.
A kind of cooling water pressure closed loop control system of kyropoulos sapphire crystallization equipment, comprise the pressure transmitter 4 being arranged on cooling water outlet mouth 3, the top hole pressure of water coolant can be detected, also comprise the electronic flow valve 5 being arranged on coolant intake 2, the uninterrupted of adjustable water coolant, and carry out central controlled PLC, wherein, described pressure transmitter 4, electronic flow valve 5 and described PLC are connected by signal wire and communicate.
The precision of described pressure transmitter 4 reaches 0.01 MPa, and having digital interface can carry out digital communication with described PLC.The sharpness of regulation of described electronic flow valve 5 reaches 1 liter/second, and having digital interface can carry out digital communication with described PLC.
Described PLC inside arranges cooling water pressure automatic control algorithm, and described cooling water pressure automatic control algorithm comprises the following steps:
Step one: the flow of the electronic flow valve 5 described in adjustment is Q, makes described pressure transmitter 4 reach P
0;
Pressure value P
0for rated operating pressure.
Step 2: the pressure transmitter 4 described in detection, obtains discharge pressure P
1, and calculating pressure deviation △ P=P
1-P
0if the absolute value of △ P is greater than 0.01 MPa, then enter step 3;
In step 2, described pressure transmitter 4 detects the top hole pressure of water coolant incessantly, if pressure departs from, then enters step 3 and processes.
Step 3: the flow of the electronic flow valve described in adjustment, regulated quantity △ Q=-S
2△ P/(ρ Q), then return step 2, wherein, S is the sectional area of described coolant intake, and ρ is the density of water coolant.
According to Bernoulli equation, P+ ρ gh+ ρ V
2/ 2=C, wherein, g is universal gravity constant, and V is flow velocity, and h is place height, and C is a constant, and the height of pipeline is fixing, so also can think that h is a constant.Carry out both sides to this formula to differentiate, obtain: △ P+ ρ V △ V=0, because Q=SV, so S
2△ P+ ρ Q △ Q=0, finally obtains △ Q=-S
2△ P/(ρ Q).
Claims (3)
1. the cooling water pressure closed loop control system of a kyropoulos sapphire crystallization equipment, it is characterized in that, comprise the pressure transmitter being arranged on cooling water outlet mouth, be arranged on the electronic flow valve of coolant intake, carry out central controlled PLC, wherein, described pressure transmitter, electronic flow valve and described PLC are connected by signal wire and communicate.
2. the cooling water pressure closed loop control system of a kind of kyropoulos sapphire crystallization equipment according to claim 1, it is characterized in that: the precision of described pressure transmitter reaches 0.01 MPa, having digital interface can carry out digital communication with described PLC.
3. the cooling water pressure closed loop control system of a kind of kyropoulos sapphire crystallization equipment according to claim 1, it is characterized in that: the sharpness of regulation of described electronic flow valve reaches 1 liter/second, having digital interface can carry out digital communication with described PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420705326.XU CN204281887U (en) | 2014-11-22 | 2014-11-22 | A kind of cooling water pressure closed loop control system of kyropoulos sapphire crystallization equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420705326.XU CN204281887U (en) | 2014-11-22 | 2014-11-22 | A kind of cooling water pressure closed loop control system of kyropoulos sapphire crystallization equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204281887U true CN204281887U (en) | 2015-04-22 |
Family
ID=52865069
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420705326.XU Expired - Fee Related CN204281887U (en) | 2014-11-22 | 2014-11-22 | A kind of cooling water pressure closed loop control system of kyropoulos sapphire crystallization equipment |
Country Status (1)
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| CN (1) | CN204281887U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104328486A (en) * | 2014-11-22 | 2015-02-04 | 刘瑜 | Cooling water pressure closed-loop control system of kyropoulos sapphire crystal growth equipment |
-
2014
- 2014-11-22 CN CN201420705326.XU patent/CN204281887U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104328486A (en) * | 2014-11-22 | 2015-02-04 | 刘瑜 | Cooling water pressure closed-loop control system of kyropoulos sapphire crystal growth equipment |
| CN104328486B (en) * | 2014-11-22 | 2016-10-19 | 宁波晶工晶体科技有限公司 | A kind of cooling water pressure closed-loop control system of kyropoulos sapphire crystallization equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20151122 |
|
| EXPY | Termination of patent right or utility model |