{"id":12996,"date":"2021-08-18T01:37:39","date_gmt":"2021-08-18T01:37:39","guid":{"rendered":"https:\/\/hqeialdi5a.wpdns.site\/?p=12996"},"modified":"2024-01-31T01:56:13","modified_gmt":"2024-01-31T01:56:13","slug":"7-best-questions-about-directional-control-valve","status":"publish","type":"post","link":"https:\/\/www.yaiwo.com\/fr\/7-best-questions-about-directional-control-valve\/","title":{"rendered":"7 Best Questions About Directional Control Valve"},"content":{"rendered":"

<\/span>Temps de lecture estim\u00e9 : <\/span>21<\/span> minute<\/span><\/p>\n\n\n\n

Question 1 : La sp\u00e9cification de la vanne de commande directionnelle du syst\u00e8me hydraulique de l'extenseur de tuyau<\/strong><\/h3>\n\n\n\n

Figure 1-1 shows the hydraulic system of a 600-ton pipe expander used in a factory. It can realize the action cycle of vertical cylinder fast down, sealing control\u00a0cylinders on both sides synchronously fast forward, mold sealing one vertical, side cylinder pressurization-two cylinders synchronously rewind the mold opening and the vertical cylinder quickly retreats the mold opening action cycle. Directional Control Valve<\/p>\n\n\n\n

\"Directional

Figure 1-1 Le syst\u00e8me hydraulique d'un extenseur de tuyau de 600 tonnes<\/figcaption><\/figure>\n\n\n\n

When the solenoid 2DT is energized, the electromagnetic directional valve 10 is switched to the left position, and the hydraulic pump 1\u2014the left position of the electro-hydraulic directional valve 8\u2014the left position of the valve 10\u2014the double hydraulic control check valve 13\u2014the rodless cavity of the vertical cylinder 19, The vertical cylinder 19 quickly descends and seals the mold. Directional Control Valve<\/p>\n\n\n\n

Lorsque la pression d'\u00e9tanch\u00e9it\u00e9 du moule atteint la valeur sp\u00e9cifi\u00e9e, le manom\u00e8tre \u00e0 contact \u00e9lectrique 14 envoie un signal, le sol\u00e9no\u00efde 2DT est coup\u00e9, 1DT, 5DT, 6DT sont aliment\u00e9s et l'huile hydraulique passe par la vanne 8 vers la droite et le vanne de d\u00e9rivation 9\u2014la vanne d'inversion \u00e9lectromagn\u00e9tique 11 vers la droite\u2014La position gauche de la vanne d'inversion \u00e9lectromagn\u00e9tique 12-le double contr\u00f4le de commande hydraulique vannes<\/a> 16 and 18 enter the rodless chambers of the side cylinders 20 and 21 respectively, and the cylinders on both sides fast forward and seal the mold synchronously. Directional Control Valve<\/p>\n\n\n\n

Lorsque la pression d'\u00e9tanch\u00e9it\u00e9 du moule atteint la valeur sp\u00e9cifi\u00e9e, le manom\u00e8tre \u00e0 contact \u00e9lectrique 17 envoie un signal, la pression hydraulique ultra-haute pression 15 et 2 ~\/ reculent en m\u00eame temps, et injectent respectivement de l'huile haute pression dans le sans tige cavit\u00e9 du cylindre vertical 19 et des cylindres lat\u00e9raux 20 et 21 pour obtenir une force de pression de sortie 6MN (600tf).<\/p>\n\n\n\n

When the electromagnets 1DT, 4DT, 7DT are energized, the cylinders on both sides will retreat and open the mold synchronously. When the end of the stroke is reached, the stroke will open and a signal will be sent. The electromagnet 1DT is de-energized and the 3DT is energized, and the vertical cylinder quickly moves upward to open the mold. Directional Control Valve<\/p>\n\n\n\n

In order to improve work efficiency and reduce power consumption, the system adopts pressure compensation variable axial piston pump 1 to achieve low-pressure and high-speed operation of vertical cylinders and side cylinders, and high-pressure and low-speed operation during mold sealing. The specifications of the three hydraulic cylinders are the same. Directional Control Valve<\/p>\n\n\n\n

\"Figure

Figure 1-2<\/figcaption><\/figure>\n\n\n\n

The vertical cylinder and the side cylinder move slowly. The vertical cylinder moves down quickly for 70 seconds, and the side cylinder moves forward quickly for 60 seconds. The return time is longer, resulting in extremely low production efficiency. Directional Control Valve<\/p>\n\n\n\n

It can be seen from the working principle of the system that the vertical cylinder’s rapid downward movement and the side cylinder’s rapid forward movement are performed independently. A hydraulic source provides flow, and its\u00a0operating speed is determined by the output flow of the hydraulic pump 1. When the vertical cylinder and the side cylinder are running quickly, because there is no load, the working pressure of the system is very low at this time and the pressure compensation variable pompe hydrolique<\/a> outputs at full flow. Directional Control Valve<\/p>\n\n\n\n

Le v\u00e9rin hydraulique se d\u00e9place lentement et le temps de fonctionnement est trop long, indiquant que le d\u00e9bit r\u00e9el entrant dans le v\u00e9rin hydraulique<\/a> c'est trop petit. Cela peut avoir les deux situations suivantes :<\/p>\n\n\n\n