CN112989575B - Platinum pipeline heating power calculation method - Google Patents
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Abstract
The invention provides a platinum pipeline heating power calculation method, which comprises the following steps: acquiring the length and the outer diameter of a platinum pipeline load in an experiment and the voltage and the current on the platinum pipeline in the experiment; acquiring the length, the outer diameter and the temperature to be heated of a platinum pipeline load to be designed; calculating the total power of the platinum pipeline load to be designed by adopting the following formula, and calculating P 1 ＝U 1 *I 1 、R 2 ＝ρ 2(T2) *L 2 /S 2 、P 2 ＝(P 1 *L 2 *T 2 *π*D 2 *L 2 )/(L 1 *T 1 *π*D 1 *L 1 )、I 2 ＝(P 2 /R 2 ) 1/2 、U 2 ＝P 2 /I 2 、U CU2 ＝I 2 *k/1000、U 3 ＝U 2 +U cu2 、P 3 ＝U 3 *I 2 . The platinum pipeline heating power calculation method greatly reduces the design power of platinum pipeline load heating, reduces the theoretical supply quantity of power energy, reduces the energy input cost, and plays an important role in the high-precision control process of production lines such as substrate glass along with the improvement of the power control precision.
Description
Technical Field
The invention belongs to the technical field of platinum heating channels, and particularly relates to a platinum pipeline heating power calculation method.
Background
The platinum channel is a device for connecting a melting tank and forming equipment in glass production and realizing glass liquid clarification, homogenization, temperature regulation and stirring. In the manufacturing process of a substrate, a cover plate or carrier glass and neutral borosilicate glass, a platinum pipeline is used for heating and controlling the temperature of glass liquid in the platinum pipeline, and the current carrying capacity which can be born by the load of the platinum pipeline is generally used as the upper current limit of an electric heating system.
The functions of the platinum pipeline mechanical body are two: the first platinum pipeline is used as a resistive heating load to control the temperature of glass in the platinum pipeline; the second platinum pipeline is designed into a certain mechanical structure, so that the platinum pipeline body cannot be deformed by dead weight or external heat insulation materials under the heating state of the platinum pipeline, for example, in order to ensure the pressure-bearing performance of the platinum pipeline, the platinum pipeline needs to be designed with a certain thickness. If the platinum pipeline load current is calculated strictly according to factors such as the thickness and the length of the platinum pipeline load, the thickness of a part of the platinum pipeline load with a supporting function is also calculated, so that in the load theory calculation, the power calculation result of the platinum pipeline load often exceeds the power required by actual heating by one time, and the designed electric control heating system has overlarge power due to the fact that the heating power of the actually required platinum pipeline load is less, the heating efficiency of the platinum pipeline load is low, the control precision is low, and meanwhile, the input cost of electric control system hardware is also greatly increased.
Disclosure of Invention
The invention aims to provide a platinum pipeline heating power calculation method, which aims to solve the technical problems of overlarge power, low heating efficiency, low control precision and high hardware input cost of an electric control system of a platinum pipeline load electric control heating system in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme: the invention provides a platinum pipeline heating power calculation method, which comprises the following steps:
acquiring the length, the outer diameter and the voltage and the current of a platinum pipeline load in an experiment;
acquiring the length, the outer diameter and the heating temperature of a platinum pipeline load to be designed;
the total power of the platinum pipeline load to be designed is calculated by adopting the following formula,
P 1 ＝U 1 *I 1
R 2 ＝ρ 2(T2) *L 2 /S 2
P 2 ＝(P 1 *L 2 *T 2 *π*D 2 *L 2 )/(L 1 *T 1 *π*D 1 *L 1 )
I 2 ＝(P 2 /R 2 ) 1/2
U 2 ＝P 2 /I 2
U CU2 ＝I 2 *k/1000
U 3 ＝U 2 +U cu2
P 3 ＝U 3 *I 2 ；
wherein: p (P) 1 The heating power of the platinum pipeline load in the experiment; u (U) 1 Voltage on platinum pipeline load in experiment; i 1 The current on the platinum pipeline load in the experiment; t (T) 1 The heating temperature of the platinum pipeline load required in the experiment is set; d (D) 1 The outer diameter of the platinum pipeline load in the experiment; l (L) 1 The length of the platinum pipeline load in the experiment is as follows; d (D) 2 The outer diameter of the platinum pipeline load in the experiment; s is S 2 The area of the cross section of the platinum pipeline load to be designed; p (P) 2 The heating power of a platinum pipeline load to be designed is; t (T) 2 The heating temperature of the platinum pipeline load required by the design is set; u (U) 2 The voltage of a platinum pipeline load to be designed is set; i 2 The method comprises the steps of designing current on a platinum pipeline load to be designed; d (D) 2 The outer diameter of a platinum pipeline load to be designed is; l (L) 2 The length of the platinum pipeline load to be designed is; ρ 2(T2) Load T for platinum pipeline to be designed 2 Resistivity under; r is R 2 A resistor of a platinum pipeline load to be designed; u (U) cu2 The voltage consumption is carried out on a platinum pipeline load circuit to be designed; u (U) 3 The method comprises the steps of designing the voltage of a platinum pipeline load circuit for a to-be-designed platinum pipeline; p (P) 3 The total power of the platinum pipeline load to be designed is; 1<k<1.30。
In one embodiment, the area of the cross section of the platinum pipe load to be designed is calculated using the following formula: s is S 2 ＝π*D 2 * Delta, wherein delta is the thickness of the platinum pipeline load to be designed.
In one embodiment, the area of the cross section of the platinum pipe load to be designed is calculated using the following formula: s is S 2 ＝π*(R Outer part 2 -R Inner part 2 ) Wherein R is Outer part For the radius of the load outer ring of the platinum pipeline to be designed, R Inner part And loading the radius of the inner ring for the platinum pipeline to be designed.
In one embodiment, the outer diameter of the platinum pipe load in the experiment is 100mm, the length of the platinum pipe load in the experiment is 1000mm, and the wall thickness of the platinum pipe load in the experiment is 1mm.
In one embodiment, the platinum pipe load is connected to the transformer through a platinum flange in the experiment, the voltage on the platinum pipe load is the voltage between the two platinum flanges in the experiment, and the current on the platinum pipe load is the current between the two platinum flanges in the experiment.
In one embodiment, an insulating material is arranged on the outer side of the platinum pipeline load in the experiment, and the insulating material is an insulating material.
In one embodiment, the thickness of the platinum pipe load in the experiment is obtained by a vernier caliper, and the thickness of the platinum pipe load to be designed is obtained by the vernier caliper.
In one embodiment, the thickness of the platinum pipe load to be designed is greater than 1.5mm.
In one embodiment, the thickness of the platinum pipe load to be designed is 2mm.
In one embodiment, the k=1.20.
The intelligent card sleeve provided by the invention has the beneficial effects that: the total power of the platinum pipeline load to be designed, which is obtained by the platinum pipeline heating power calculation method, is 50% -75% lower than the total power obtained by calculation of the traditional algorithm, the kinetic energy supply of the heating power of the corresponding platinum pipeline load is reduced by 50% -75%, the total power of the platinum pipeline load, which is obtained by the platinum pipeline heating power calculation method, greatly reduces the design power of the platinum pipeline load, reduces the theoretical supply quantity of power energy, improves the power control precision, reduces the energy input cost, and plays an important role in the high-precision control process of the substrate glass production line along with the improvement of the power control precision.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a platinum pipeline load in an experiment according to an embodiment of the present invention.
Wherein, each reference sign in the figure:
1-platinum pipeline load;
2-platinum flange;
length of the L-platinum pipeline load;
the outer diameter of the D-platinum pipeline load;
thickness of delta-platinum pipe load.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "comprising," and any variations thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.
The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone.
The embodiment of the invention provides a platinum pipeline heating power calculation method, which comprises the following steps:
acquiring the length, the outer diameter and the voltage and the current of a platinum pipeline load in an experiment;
acquiring the length, the outer diameter and the heating temperature of a platinum pipeline load to be designed;
the total power of the platinum pipeline load to be designed is calculated by adopting the following formula,
P 1 ＝U 1 *I 1
R 2 ＝ρ 2(T2) *L 2 /S 2
P 2 ＝(P 1 *L 2 *T 2 *π*D 2 *L 2 )/(L 1 *T 1 *π*D 1 *L 1 )
I 2 ＝(P 2 /R 2 ) 1/2
U 2 ＝P 2 /I 2
U CU2 ＝I 2 *k/1000
U 3 ＝U 2 +U cu2
P 3 ＝U 3 *I 2 ；
wherein: t (T) 1 The heating temperature of the platinum pipeline load required in the experiment is set; p (P) 1 For T in experiments 1 Heating power of a corresponding platinum pipeline load; u (U) 1 T in experiments 1 Voltage on the corresponding platinum pipeline load; i 1 T in experiments 1 Current on the corresponding platinum pipeline load; d (D) 1 The outer diameter of the platinum pipeline load in the experiment; l (L) 1 The length of the platinum pipeline load in the experiment is as follows; d (D) 2 The outer diameter of a platinum pipeline load to be designed is; s is S 2 The area of the cross section of the platinum pipeline load to be designed; p (P) 2 Heating for platinum pipeline load to be designedA power; t (T) 2 The heating temperature of the platinum pipeline load to be designed is set; u (U) 2 The voltage of a platinum pipeline load to be designed is set; i 2 The method comprises the steps of designing current on a platinum pipeline load to be designed; d (D) 2 The outer diameter of a platinum pipeline load to be designed is; l (L) 2 The length of the platinum pipeline load to be designed is; ρ 2(T2) Load T for platinum pipeline to be designed 2 Resistivity under; r is R 2 A resistor of a platinum pipeline load to be designed; u (U) cu2 The voltage consumption is carried out on a platinum pipeline load circuit to be designed; u (U) 3 The voltage of a platinum pipeline load circuit is to be designed; p (P) 3 The total power of the platinum pipeline load to be designed is; 1<k<1.30。
The platinum pipeline heating power calculation method of the embodiment of the invention is mainly used in the industries of heating by using platinum channels, such as glass substrates, carrier plates, cover plates, medical glass and the like.
The existing platinum pipeline load heating power calculation method takes the platinum current density J at the process requirement temperature T as a starting point for calculation, and the specific deduction process is as follows: assuming that the outer diameter of a load of a certain section of the platinum channel is D, the thickness is delta, the length is L, and the process requirement running temperature is T, the method comprises the following steps:
area of platinum pipe load cross section: s=pi×d×δ;
platinum pipeline load current: i=j×s;
platinum pipeline load resistance: r is R T ＝ρ T *L/S；
Platinum pipe load voltage drop: u (U) T ＝I*R T ；
The consumption voltage of the load circuit connected with the platinum pipeline is calculated according to the ratio of every 1000A/1V:
U cu1 ＝I/1000*1；
the voltage required to supply the load: u=u T +U cu1 ；
Platinum load heating power: p=u×i;
the deduction process shows that the heating part of the platinum pipeline load in the existing platinum pipeline load heating power calculation method is completely calculated by depending on the physical calculated value, and the actual heating power of the platinum pipeline load in the production process is not considered.
The invention takes the heating power of the platinum pipeline load in the experiment as a starting point, and deduces and calculates the heating power of the platinum pipeline load in actual use. The specific deduction process is as follows: assume that the load parameter of a platinum pipeline at a certain section in the experiment is the length L 1 Thickness delta 1 Outer diameter D 1 The load parameter of the platinum pipeline to be designed is L 2 Thickness delta 2 Outer diameter D 2 Resistivity ρ 2 。
The highest temperature of the platinum pipeline load in the experiment is T 1 The highest temperature value of the platinum pipeline load to be designed is T 2 Test temperature T 1 When in use, the flange voltage U of the platinum pipeline is measured 1 And platinum pipe current I 1 The following steps are:
actual heating power P of platinum pipeline load in experiment 1 ：
P 1 ＝U 1 *I 1 ；
Resistor R of platinum pipeline load to be designed 2 ：
R 2 ＝ρ 2(T2) *L 2 /S 2 (ρ 2(T2) Is ρ 2 At temperature T 2 Resistivity at time);
the heating power required by the platinum pipeline load is directly proportional to the length, the temperature and the heating surface area, and the heating power P of the platinum pipeline to be designed 2 ：
P 2 ＝(P 1 *L 2 *T 2 *π*D 2 *L 2 )/(L 1 *T 1 *π*D 1 *L 1 )；
Platinum pipeline load current value I to be designed 2 ：
I 2 ＝(P 2 /R 2 ) 1/2 ；
Calculating the voltage U of a platinum pipeline load to be designed according to ohm's law 2 :
U 2 ＝I 2 *R 2 ；
Consumption voltage U of load circuit of platinum pipeline to be designed CU2 :
U CU2 ＝I 2 *k/1000；
Required voltage U of platinum pipeline load to be designed 3 ：
U 3 ＝U 2 +U cu2 ；
Total power P of platinum pipeline load to be designed 3 ：
P 3 ＝U 3 *I 2 ；
The method for calculating the heating power of the platinum pipeline provided by the invention is described in detail below by combining specific embodiments.
Fig. 1 is a schematic structural diagram of a platinum pipeline load in an experiment according to an embodiment of the present invention, please refer to fig. 1, a platinum pipeline heating experimental apparatus is established, and a length L of the platinum pipeline load 1 1 An outer diameter D of a platinum pipeline load 1 of 1000mm 1 100mm thick wall delta of platinum pipeline load 1 1 The platinum pipe was heated to 1300 ℃ for 1mm, and the voltage and current on the platinum flange 2 were measured, wherein the voltage U on the platinum pipe load 1 in the experiment 1 Current I on platinum pipe load 1 in the experiment at 6V 1 1600A.
In the platinum pipeline heating equipment to be designed, the length L of the platinum pipeline load 2 1000mm, outer diameter D 2 300mm wall thickness delta 2 For 2mm, a platinum pipe is heated to 1640 ℃, the load power of the platinum pipe is P2, the total load power of the platinum pipe is P3, and the method is as follows:
heating power P of platinum pipeline load in experiment 1 ＝U 1 *I 1 ＝9.6Kw；
Resistor R of platinum pipeline load to be designed 2 ＝ρ 2(T2) *L 2 /S 2 ＝301.8μΩ；
Heating power P of platinum pipeline load to be designed 2 ＝(P 1 *L 2 *T 2 *π*D 2 *L 2 )/(L 1 *T 1 *π*D 1 *L 1 )＝36.33Kw；
Current I on platinum pipeline load to be designed 2 ＝(P 2 /R 2 ) 1/2 ＝10971.7A；
Voltage U of platinum pipeline load to be designed 2 ＝I 2 *R 2 ＝3.31V；
Consumption voltage U of load circuit of platinum pipeline to be designed CU2 ＝I 2 *k/1000＝13.17V；
Platinum pipeline load circuit voltage U to be designed 3 ＝U 2 +U cu2 ＝16.48V；
Total power P of platinum pipeline load to be designed 3 ＝U 3 *I 2 ＝182.794Kw；
Wherein 1< k <1.30, k=1.20 in the embodiment, the total power of the platinum pipeline load to be designed is 182.794Kw, the voltage of the platinum pipeline load circuit to be designed is 16.48V, and the load supply current is 10971.7a.
In the existing calculation method of the heating power of the platinum pipeline load, the heating part of the platinum pipeline load is completely calculated by depending on a physical calculated value, the actual heating power of the platinum pipeline in the production process is not considered, and the existing calculation method is adopted, so that the total power P= 445.18Kw of the platinum pipeline load to be designed.
The length, thickness, outer diameter and heating loop number of the platinum pipeline load in the experiment of the embodiment can be randomly changed, and the experiment is not considered as a limitation; platinum pipeline flange voltage U 1 Flange current I 1 According to the actual measurement, the experimental true value is used as the reference;
alternatively, the calculation method of calculating the area of the cross section of the platinum pipe load in this example may take the following two algorithms:
the area of the cross section of the platinum pipeline load to be designed is calculated by adopting the following formula: s is S 2 ＝π*D 2 * Delta, wherein delta is the thickness of the platinum pipeline load to be designed.
Alternatively, the area of the cross section of the platinum pipe load to be designed is calculated using the following formula: s is S 2 ＝π*(R Outer part 2 -R Inner part 2 ) Wherein R is Outer part For the radius of the load outer ring of the platinum pipeline to be designed, R Inner part And loading the radius of the inner ring for the platinum pipeline to be designed.
In the experiment of the embodiment, the platinum channel load 1 is connected with the transformer through the platinum flanges 2, the voltage on the platinum channel load 1 in the experiment is the voltage between the two platinum flanges 2, and the current on the platinum channel load 1 in the experiment is the current between the two platinum flanges 2.
Preferably, the thickness of the platinum pipeline load to be designed is larger than 1.5mm, the thickness of the platinum pipeline load in this embodiment is 2mm, it is guaranteed that the platinum heating body cannot be deformed by dead weight or external heat insulation materials under the heating state of the platinum pipeline load, and the function of a part of thickness in the platinum pipeline load is for bearing pressure.
In this embodiment, k=1.20.
The heat insulation material loaded by the platinum pipeline in the experiment of the embodiment has the same heat insulation effect as the heat insulation material loaded by the platinum pipeline to be designed.
The total power value of the platinum pipeline load calculated by the platinum pipeline heating power calculation method is 25% -50% of the physical current-carrying capacity power calculation value. If the physical current-carrying capacity theory is used for designing the load power of the platinum pipeline, the actual power is only 25% -50% of the designed load power finally in production, and the power factor of electric heating is usually less than 0.5 because full wave heating is not possible. Therefore, the method for calculating the heating power of the platinum pipeline can greatly reduce the design power of the platinum pipeline load, reduce the theoretical supply quantity of power energy and reduce the input cost of useless hardware and energy.
The total power of the platinum pipeline load to be designed, which is obtained by the platinum pipeline heating power calculation method, is 50% -75% lower than the total power obtained by calculation of a traditional algorithm, the kinetic energy supply of the corresponding platinum pipeline load heating power is reduced by 50% -75%, the total power of the platinum pipeline load, which is obtained by the platinum pipeline heating power calculation method, greatly reduces the design power of the platinum pipeline load, reduces the theoretical supply quantity of power energy, improves the power control precision, reduces the useless hardware and energy input cost, and plays a very important role in the high-precision control process of the substrate glass production line along with the improvement of the power control precision.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. The method for calculating the heating power of the platinum pipeline is characterized by comprising the following steps of:
acquiring the length, the outer diameter and the voltage and the current of a platinum pipeline load in an experiment;
acquiring the length, the outer diameter and the heating temperature of a platinum pipeline load to be designed;
the total power of the platinum pipeline load to be designed is calculated by adopting the following formula,
P 1 ＝U 1 *I 1
R 2 ＝ρ 2(T2) *L 2 /S 2
P 2 ＝(P 1 *L 2 *T 2 *π*D 2 *L 2 )/(L 1 *T 1 *π*D 1 *L 1 )
I 2 ＝(P 2 /R 2 ) 1 / 2
U 2 ＝P 2 /I 2
U CU2 ＝I 2 *k/1000
U 3 ＝U 2 +U cu2
P 3 ＝U 3 *I 2 ；
wherein: p (P) 1 The heating power of the platinum pipeline load in the experiment; u (U) 1 Voltage on platinum pipeline load in experiment; i 1 The current on the platinum pipeline load in the experiment; t (T) 1 The heating temperature of the platinum pipeline load required in the experiment is set; d (D) 1 The outer diameter of the platinum pipeline load in the experiment; l (L) 1 The length of the platinum pipeline load in the experiment is as follows; s is S 2 The area of the cross section of the platinum pipeline load to be designed; p (P) 2 The heating power of a platinum pipeline load to be designed is; t (T) 2 The heating temperature of the platinum pipeline load required by the design is set; u (U) 2 The voltage of a platinum pipeline load to be designed is set; i 2 The method comprises the steps of designing current on a platinum pipeline load to be designed; d (D) 2 The outer diameter of a platinum pipeline load to be designed is; l (L) 2 The length of the platinum pipeline load to be designed is; ρ 2(T2) Load T for platinum pipeline to be designed 2 Resistivity under; r is R 2 A resistor of a platinum pipeline load to be designed; u (U) CU2 The voltage consumption is carried out on a platinum pipeline load circuit to be designed; u (U) 3 The method comprises the steps of designing the voltage of a platinum pipeline load circuit for a to-be-designed platinum pipeline; p (P) 3 The total power of the platinum pipeline load to be designed is; k is a coefficient of 1<k<1.30。
2. The platinum pipeline heating power calculation method as claimed in claim 1, wherein: the area of the cross section of the platinum pipeline load to be designed is calculated by adopting the following formula: s is S 2 ＝π*D 2 * Delta, wherein delta is the thickness of the platinum pipeline load to be designed.
3. The platinum pipeline heating power calculation method as claimed in claim 1, wherein: the area of the cross section of the platinum pipeline load to be designed is calculated by adopting the following formula: s is S 2 ＝π*(R Outer part 2 -R Inner part 2 ) Wherein R is Outer part For the radius of the load outer ring of the platinum pipeline to be designed, R Inner part And loading the radius of the inner ring for the platinum pipeline to be designed.
4. The platinum pipeline heating power calculation method as claimed in claim 1, wherein: the outer diameter of the platinum pipeline load in the experiment is 100mm, the length of the platinum pipeline load in the experiment is 1000mm, and the wall thickness of the platinum pipeline load in the experiment is 1mm.
5. The platinum pipeline heating power calculation method as claimed in claim 1, wherein: the platinum pipeline load in the experiment is connected with the transformer through the platinum flange, the voltage on the platinum pipeline load in the experiment is the voltage between the two platinum flanges, and the current on the platinum pipeline load in the experiment is the current between the two platinum flanges.
6. The platinum pipe heating power calculation method according to claim 5, wherein: in the experiment, a thermal insulation material is arranged on the outer side of the platinum pipeline load, and the thermal insulation material is an insulating material.
7. The platinum pipeline heating power calculation method as claimed in claim 1, wherein: in the experiment, the thickness of the platinum pipeline load is obtained through a vernier caliper, and the thickness of the platinum pipeline load to be designed is obtained through the vernier caliper.
8. The platinum pipeline heating power calculation method as claimed in claim 1, wherein: the thickness of the platinum pipeline load to be designed is larger than 1.5mm.
9. The platinum pipeline heating power calculation method as claimed in claim 8, wherein: the thickness of the platinum pipeline load to be designed is 2mm.
10. The platinum pipeline heating power calculation method as claimed in claim 1, wherein: the k=1.20.
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| CN101144925A (en) * | 2007-09-30 | 2008-03-19 | 彩虹集团电子股份有限公司 | Platinum gold channel electric-heating design method |
| CN101708945A (en) * | 2009-05-08 | 2010-05-19 | 河北东旭投资集团有限公司 | Method for accurately controlling viscosity of molten state glass in platinum channel |
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