CN115935556A - Method for selecting pipe diameter and calculating number of cable protection pipes in power transformation engineering - Google Patents
Method for selecting pipe diameter and calculating number of cable protection pipes in power transformation engineering Download PDFInfo
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- CN115935556A CN115935556A CN202211723205.3A CN202211723205A CN115935556A CN 115935556 A CN115935556 A CN 115935556A CN 202211723205 A CN202211723205 A CN 202211723205A CN 115935556 A CN115935556 A CN 115935556A
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- 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
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
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Abstract
The invention discloses a method for selecting pipe diameters and calculating the number of cable protection pipes in power transformation engineering. The invention comprises the following steps: firstly, distinguishing the types of cables according to the information of the types and the sectional areas of the laid cables in a cable channel, then determining the number and the types of cable protection pipes according to certain rules and steps for the cables, and obtaining various feasible schemes through enumeration calculation; finally, the final solution, including the material, type and length of the protective tube used, is determined according to the length of the respective cable in the cable channel. The invention has the advantages of saving the time for workers to design the type of the cable protection pipe and calculate the material consumption, improving the working efficiency and reducing the cost.
Description
Technical Field
The invention relates to the field of cable laying design of power transmission and transformation engineering, in particular to a method for selecting pipe diameters and calculating the number of cable protection pipes in the power transformation engineering.
Background
At present, in the field of power transmission and transformation engineering design, each design institute has no automatic calculation scheme in terms of cable protection pipe design and material consumption, and most of the design departments designs the required protection pipes for laid cables in cable channels by means of experience, including materials, quantity and types, so that a great amount of time is consumed, and the working efficiency is low. Moreover, other better solutions may be available in the design process, and are ignored by designers, so that the finally designed protection tube has poor matching property with the cable, high cost, and cannot meet the use requirement of the cable.
Therefore, it is necessary to develop an automatic calculation method for the pipe diameter of the cable protection pipe, which has the advantages of strong universality, high working efficiency, good matching property with the cable and cost reduction.
Disclosure of Invention
The invention aims to provide a method for selecting the pipe diameter and calculating the number of cable protection pipes in power transformation engineering, which has strong universality (the invention is generally used for automatically calculating the pipe diameter of the cable protection pipe in any power transformation engineering), high working efficiency, can provide more accurate and rapid modularization and flow design methods for technicians, improves the accuracy and the working efficiency of a scheme, and has good matching with a cable (the pipe diameter and the material of the protection pipe, the model and the length of the protection pipe, which are calculated by the invention, are completely attached to the cable in the protection pipe, so that the protection effect of the protection pipe on the cable is improved), and reduces the cost (because the pipe diameter and the material, the model and the length of the protection pipe, which are calculated by the invention, are completely attached to the cable in the protection pipe, the waste of materials is greatly reduced, so that the cost is reduced); the problems that in the design of a cable protection pipe in power transmission and transformation engineering, the working efficiency is low, the designed protection pipe is poor in matching performance with a cable, the cost is high, the use requirement of the cable cannot be met and the like are solved.
In order to realize the purpose, the technical scheme of the invention is as follows: a method for selecting the pipe diameter and calculating the number of cable protection pipes in power transformation engineering comprises the following steps,
the method comprises the following steps: according to the cable information in one cable channel, distinguishing different cables such as a power cable, a control cable, an optical cable and the like from the cross section of the cable to obtain input conditions; the input conditions comprise the number, the model and the outer diameter of the cables to be laid and are used for calculating the pipe diameter and the number of the protection pipes;
step two: determining the number and the type of the cable protection pipes according to certain rules and steps according to the number and the type of the cables in the cable channel, and obtaining various feasible schemes through enumeration calculation; for example, when a protection tube with a diameter of 100 and a protection tube with a diameter of 80 are selected, enumeration calculations may result in a plurality of scenarios, such as scenario one: 2 protective tubes of diameter 100; scheme two is as follows: 1 protection tube with diameter 100 +2 protection tubes with diameter 80, etc., from a variety of solutions, the best solution can be obtained;
step three: and determining a final scheme according to the actual demand, and calculating the actual steel consumption and the budget cost.
In the above technical solution, in the step one, the input condition is determined according to the model of different cables, and the specific method is as follows: the power cable and the control cable are distinguished according to model numbers; or according to the sectional area information of the cable, inquiring a manual to obtain the outer diameter of the cable and the inner diameter size of the minimum protection pipe corresponding to the single cable;
after the information of the cables to be laid is obtained, the information of the number, the model and the like of the cables can be determined, and the information of the number, the model, the outer diameter and the like of the cables to be laid is taken as an input condition and is substituted into the step two to calculate the information of the number, the model and the like of the cable protection pipes.
In the above technical solution, in the second step, the specific method for determining the number and the type of the cable protection tubes comprises:
firstly, selecting the model of a cable protection pipe, and determining the pipe diameter and material to be used;
secondly, placing the power cable, the control cable and the optical cable in different protective tubes according to the principle of placing the power cable, the control cable and the optical cable in different tubes; according to the number and types of cables in the cable channel, different cables are arranged and combined, 3 power cables are arranged in one protection tube at most, and 4 control cables are arranged in one protection tube at most;
then, according to the cartesian law, determining the minimum value of the inner diameter of the required protection pipe under the condition that each group of cables is tangent to each other, as shown in fig. 1;
when three cables are determined to be laid in the same protection pipe, the outer diameter of the cable and the minimum inner diameter of the protection pipe need to meet a certain relation, and the minimum inner diameter of the protection pipe is calculated through a formula (1):
wherein r is 1 、r 2 、r 3 The inner diameters of the three cables respectively; r is 4 For protection ofThe inner diameter of the protective tube;
and finally, determining a final scheme according to the actual engineering situation, wherein the final scheme comprises the content of the number, the model and the like of the used protective tubes.
In the above technical solution, the laying scheme of the cable protection tube can be optimized according to the actual engineering requirements (such as the length of each cable in the cable channel) or cost factors, the final scheme (including the material, model and length of the protection tube) is determined, and the steel consumption and the required cost are calculated. According to the method, the obvious and unreasonable cable protection pipe laying scheme is eliminated according to actual engineering experience and use requirements, and a reasonable scheme is selected, so that the cable protection pipe laying scheme is good in matching performance between the protection pipe and the cable on the premise that the use requirements of the cable are met, the required steel consumption and cost are the lowest, and the cost is reduced.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a method for selecting the pipe diameter and calculating the number of cable protection pipes in power transformation engineering, so that the time for workers to design the types of the cable protection pipes and calculate the material consumption is saved, and the working efficiency is improved.
The invention can automatically calculate various feasible schemes on the premise of meeting the requirements of the user, compares various schemes for the user and recommends the optimal scheme, and has certain practical value.
Drawings
Fig. 1 is a graph showing the relationship between the outer diameter of a cable and the minimum inner diameter of a protective tube when three cables are laid in the same protective tube in the present invention.
FIG. 2 is a process flow diagram of the present invention.
R in FIG. 1 1 、r 2 、r 3 The inner diameter of the three cables; r is a radical of hydrogen 4 Is the inner diameter of the protective tube.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to these embodiments. While the advantages of the invention will be clear and readily understood by the description.
According to the number, section and model of the laid cables and the model and size of the protection pipe which are preset manually, various schemes can be obtained through enumeration calculation, so that the optimal scheme of the actual use model, number and final cost of the cable protection pipe is determined, the time for workers to design the type of the cable protection pipe and calculate the material consumption is saved, and the working efficiency is improved.
With reference to the accompanying drawings: a method for selecting the pipe diameter and calculating the number of cable protection pipes in power transformation engineering comprises the following steps,
the method comprises the following steps: according to the cable information in a certain cable channel, different cables such as a power cable, a control cable and an optical cable are distinguished from the cross section of the cable, and the input condition can be determined according to the types of the different cables. Namely: (1) The power cable and the control cable can be distinguished according to model numbers and identified in models, for example, the common model of the power cable is YJV, the common model of the control cable is KVVP, DJVPVP and the like; (2) The outer diameter of the cable and the inner diameter size of the minimum protection pipe corresponding to the single cable can be obtained according to the sectional area information of the cable and an inquiry manual.
Step two: the method comprises the following steps of determining the number and the type of cable protection pipes according to input conditions (namely the number and the type of cables in a cable channel, according to certain rules and steps, enumerating and calculating the number and the pipe diameter of the cable protection pipes and various feasible schemes for detailed cable laying, wherein the specific method comprises the following steps:
firstly, for selecting the model of a cable protection pipe, determining the pipe diameter and material to be used as a to-be-selected item of the available protection pipe;
and secondly, placing the power cable, the control cable and the optical cable in different protective tubes according to the principle of placing the power cable, the control cable and the optical cable in different tubes. In each protection tube, the number of power cables is at most three, and the number of control cables is at most four. The cables can be arranged and combined by using an enumeration method according to the number and types of the cables in the cable channel, so that the power cables are ensured to be at most 3 cables in one group, and the control cables are at most 4 cables in one group;
then, according to cartesian law, the minimum value of the inner diameter of the protection tube required for each group of cables to be tangent to each other is determined (as shown in fig. 1).
And finally, determining a final scheme according to the length of each cable in the cable channel, wherein the final scheme comprises the material, the model and the length of the used protective tube.
Step three: and determining a final scheme according to the actual demand, and calculating the actual steel consumption and the budget cost. The method can be considered according to actual engineering requirements or cost factors, the laying scheme of the cable protection pipe is optimized, the matching performance of the protection pipe and the cable is good, the required steel consumption and cost are the lowest on the premise that the use requirement of the cable is met, the final laying scheme of the cable protection pipe is determined, the steel consumption and the required cost are calculated, the cost is reduced, the time for designing the type of the cable protection pipe and calculating the material consumption is saved, and the working efficiency is improved.
Other parts not described belong to the prior art.
Claims (4)
1. A method for selecting pipe diameters and calculating the number of cable protection pipes in power transformation engineering is characterized by comprising the following steps:
the method comprises the following steps: according to the cable information in one cable channel, distinguishing different cable lines from the cross sections of the cables to obtain input conditions;
step two: determining the number and the type of the cable protection pipes according to certain rules and steps according to the number and the type of the cables in the cable channel, and obtaining various feasible schemes through enumeration calculation;
step three: and determining a final scheme according to the actual demand, and calculating the actual steel consumption and the budget cost.
2. The method for selecting the pipe diameter and calculating the number of the cable protection pipes in the power transformation engineering according to claim 1, wherein the method comprises the following steps: in the first step, input conditions determined according to the models of different cables are obtained, and the specific method comprises the following steps: the power cable and the control cable are distinguished according to model numbers; or according to the sectional area information of the cable, inquiring a manual to obtain the outer diameter of the cable and the inner diameter size of the minimum protection pipe corresponding to the single cable.
3. The method for selecting the pipe diameter and calculating the number of the cable protection pipes in the power transformation engineering according to claim 1 or 2, wherein the method comprises the following steps: in the second step, the specific method for determining the number and the type of the cable protection pipes comprises the following steps:
firstly, selecting the model of a cable protection pipe, and determining the pipe diameter and material to be used;
secondly, according to the principle that the power cable, the control cable and the optical cable are placed in different protective tubes in different tubes; according to the number and types of cables in the cable channel, different cables are arranged and combined, 3 power cables are arranged in one protection tube at most, and 4 control cables are arranged in one protection tube at most;
then, according to the Cartesian law, determining the minimum value of the inner diameter of the required protection pipe under the condition that every two cables of each group are tangent;
when three cables are laid in the same protective tube, the outer diameter of each cable and the minimum inner diameter of the protective tube satisfy a certain relation, and the minimum inner diameter of the protective tube is calculated through a formula (1):
wherein r is 1 、r 2 、r 3 The inner diameters of the three cables are respectively; r is 4 The inner diameter of the protective tube;
and finally, determining a final scheme according to the actual engineering situation, wherein the final scheme comprises the number and the model of the used protection pipes.
4. The method for selecting the pipe diameter and calculating the number of the cable protection pipes in the power transformation engineering according to claim 3, wherein the method comprises the following steps: and (4) considering according to actual engineering requirements or cost factors, optimizing the laying scheme of the cable protection pipe, determining a final scheme and calculating the steel consumption and the required cost.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211723205.3A CN115935556A (en) | 2022-12-30 | 2022-12-30 | Method for selecting pipe diameter and calculating number of cable protection pipes in power transformation engineering |
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| CN202211723205.3A CN115935556A (en) | 2022-12-30 | 2022-12-30 | Method for selecting pipe diameter and calculating number of cable protection pipes in power transformation engineering |
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2022
- 2022-12-30 CN CN202211723205.3A patent/CN115935556A/en active Pending
Patent Citations (6)
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| US20100303418A1 (en) * | 2009-05-27 | 2010-12-02 | Wei-Min Wang | Fiber guiding platform for mechanical splicer, optical connectors, fiber holder and methods |
| CN203859457U (en) * | 2014-05-19 | 2014-10-01 | 广东威恒输变电工程有限公司 | High-voltage cable tube |
| US20190116090A1 (en) * | 2017-10-17 | 2019-04-18 | City University Of Hong Kong | Method for determining optimal laying arrangement of infrastructure link |
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| JP2020014291A (en) * | 2018-07-13 | 2020-01-23 | 積水化学工業株式会社 | Cable protection conduit |
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