Ka boenjiniere bo bong bo boenjiniere, khetho e nepahetseng ea li-vaeves tsa motlakase ke e 'ngoe ea maemo a netefatso ea ho fihlela litlhoko tsa tšebeliso. If the electric valve used is not selected properly, it will not only affect the use, but also bring adverse consequences or serious losses, therefore, the correct selection of electric valves in the pipeline engineering design.
Tikoloho e sebetsang ea phula ea motlakase
In addition to paying attention to the pipeline parameters, special attention should be paid to the environmental conditions of its operation, because the electric device in the electric valve is an electromechanical equipment, and its working condition is greatly affected by its working environment. Ka tloaelo, tikoloho e sebetsang ea phuleng ea motlakase e tjena:
1. Ho kenya ka tlung kapa tšebeliso ea kantle ka mehato ea ts'ireletso;
2. Ho kenya kantle ho moea o bulehileng, ka moea, lehlabathe, pula le phoka, khanya ea letsatsi le likhohola tse ling;
3. E na le khase e tukang kapa e phatlohang kapa tikoloho ea lerōle;
4. Tikoloho e chesang e mongobo ea tropike;
5. Mocheso oa liemahale o phahame hoo e phahameng ka 480 ° C kapa ka holimo;
6. Mocheso o haufi o ka tlase -20 ° C;
7. Ho bonolo ho koaloa kapa ho qoelisoa ka metsing;
8. Litlhophiso tse nang le lisebelisoa tsa moea (limela tsa matla a nyutlelie le lisebelisoa tsa liteko tsa moea);
9. Tikoloho ea sekepe kapa boeti (e nang le letsoai le spray, hlobo le mongobo);
10. Maemo a vibration e matla;
11. Ke nako ea nako e tloaetseng ho chesa;
For the electric valves in the above-mentioned environments, the structure, materials and protective measures of the electric devices are different. Ka hona, sesebelisoa sa motlakase se tsamaellanang se lokela ho khethoa ho latela tikoloho e boletsoeng ka holimo ea ts'ebetso.
Litlhokahalo tsa ts'ebetso bakeng sa motlakaseli-valves
Ho latela litlhokahalo tsa boikoetliso tsa boenjiniere, bakeng sa phula ea motlakase, mosebetsi oa taolo o phethetsoe ke sesebelisoa sa motlakase. The purpose of using electric valves is to realize non-manual electrical control or computer control for the opening, closing and adjustment linkage of valves. Lisebelisoa tsa motlakase tsa kajeno ha li sebelisetsoa ho pholosa basebetsi. Due to the large differences in the function and quality of products from different manufacturers, the selection of electric devices and the selection of valves are equally important to the project.
Taolo ea motlakase ea motlakaseli-valves
Due to the continuous improvement of the requirements of industrial automation, on the one hand, the use of electric valves is increasing, and on the other hand, the control requirements of electric valves are getting higher and more complex. Ka hona, moralo oa li-valve tsa motlakase ho latela taolo ea motlakase hape e boetse e ntlafalitsoe khafetsa. With the progress of science and technology and the popularization and application of computers, new and diverse electrical control methods will continue to appear. Bakeng sa taolo e akaretsang ea motlakaseValve, tlhokomelo e lokela ho lefuoa ho khethoa ha mokhoa oa taolo oa phallo ea motlakase. For example, according to the needs of the project, whether to use the centralized control mode, or a single control mode, whether to link with other equipment, program control or the application of computer program control, etc., the control principle is different. The sample of the valve electric device manufacturer only gives the standard electrical control principle, so the use department should make a technical disclosure with the electric device manufacturer and clarify the technical requirements. Ntle le moo, ha u khetha valeve e hlakileng ea motlakase, u lokela ho nahana ka hore na o lokela ho reka molaoli oa Volve ea motlakase oa motlakase. Ka kakaretso, molaoli o hloka ho rekoa ka thoko. In most cases, when using a single control, it is necessary to purchase a controller, because it is more convenient and cheaper to purchase a controller than to design and manufacture it by the user. When the electrical control performance can not meet the engineering design requirements, the manufacturer should be proposed to modify or redesign.
The valve electric device is a device that realizes valve programming, automatic control and remote control*, and its motion process can be controlled by the amount of stroke, torque or axial thrust. Since the operating characteristics and utilization rate of the valve actuator depend on the type of valve, the working specification of the device, and the position of the valve on the pipeline or equipment, the correct selection of the valve actuator is essential to prevent overload (the working torque is higher than the control torque). Ka kakaretso, motheo oa khetho e nepahetseng ea lisebelisoa tsa motlakase tsa Valve e tjena:
There are two main machine structures for operating the thrust valve electric device: one is not equipped with a thrust disc and directly outputs torque; E 'ngoe ke ho hlophisa poleiti ea matšeliso,' me toropo ea tlhahiso e fetotsoe ho potlakisa ho tsoa ka nut nut nut nut e le poleiti.
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Haeba mokhoa oa ho bula le ho koala oa valeve e potlakileng o tebile haholo, ho bonolo ho hlahisa hamore ea metsi. Ka hona, ho bula hantle le ho koaloa ka lebelo ho lokela ho khethoa ho latela maemo a fapaneng a tšebeliso.
Bangoli ba Valve ba na le litlhoko tsa bona tse ikhethang, hore ba tlameha ho khona ho hlalosa matla a maholo kapa a axial. HangataValveli-acteators li sebelisa li-corqueling tse rekisoang. Ha boholo ba sesebelisoa sa motlakase se ikemiselitse, toropo ea eona ea ho laola litoropo le eona e etsoa. Ka kakaretso e matha nakong e reriloeng esale pele, koloi e ke ke ea tlatsoa haholo. However, if the following situations occur, it may lead to overload: first, the power supply voltage is low, and the required torque cannot be obtained, so that the motor stops rotating; the second is to mistakenly adjust the torque limiting mechanism to make it greater than the stopping torque, resulting in continuous excessive torque and stopping the motor; Ea boraro ke tšebeliso ea lipakeng, 'me ho bokelloa ha mocheso ho feta tekano e feta boleng bo ke keng ba susumetsoa ke koloi; Ea bone, potoloho ea toropo e khothalletsang mochine e bonolo e atlehile ka lebaka le itseng, e etsang hore toropo e kholo haholo; Oa bohlano, mocheso o makatsang o phahame haholo, o fokotsang bophahamo ba mocheso ba koloi.
In the past, the method of protecting the motor was to use fuses, overcurrent relays, thermal relays, thermostats, etc., but these methods have their own advantages and disadvantages. Ha ho na mokhoa o tšepahalang oa ts'ireletso bakeng sa lisebelisoa tse fapaneng tse kang lisebelisoa tsa motlakase. Therefore, various combinations must be adopted, which can be summarized into two kinds: one is to judge the increase or decrease of the input current of the motor; Ea bobeli ke ho ahlola boemo bo futhumatsang ba koloi ka boeona. Ka tsela ena, tsela e ka 'na ka tsela e' ngoe e nka nako e behiloeng ea nako ea bophahamo ba motor ea mocheso.
Generally, the basic protection method of overload is: overload protection for continuous operation or jog operation of the motor, using a thermostat; Bakeng sa ts'ireletso ea motor stall rotor, ho amoheloa ha futhumamisoa hoa amoheloa; Bakeng sa likotsi tse khutšoane tsa potoloho, li-file kapa pherato e fetisitsoeng khafetsa.
Ho beiloe ho hongataSerurubele,Heke Valical, Lekola valveLintlha, u ka ikopanya le rona ka whatsapp kapa e-mail.
Nako ea poso: NOV-26-2024
