一、闸板阀的基本结构闸板阀是一种靠闸板升降来切断浆液，具有结构简单、耐磨损、密封性好、操作方便等优点。其基本结构包括阀体、闸板、填料、活动轴承和手动装置等。

　　1. Basic Structure of the Slide Gate Valve  The slide gate valve is a type of valve that cuts off slurry by raising and lowering the gate plate, featuring advantages such as simple structure, wear resistance, excellent sealing performance, and convenient operation. Its basic components include the valve body, gate plate, packing, sliding bearing, and manual operating device.

　　二、闸板阀为什么要回半圈

　　2. Why is the gate valve turned back half a turn

　　1、闸板阀的关闭和开启都需要借助闸板的移动来完成，而闸板的开启或关闭，需要对其进行一定角度的旋转。回半圈是为了保证阀门的密封性和稳定性。2、同时钢铁材料是具有一定的弹性的，回半圈是为了防止超过其弹性形变范围，导致丝杆损毁。

　　1. The closing and opening of the gate valve must be accomplished by moving the gate plate, and the gate plate requires a certain angle of rotation to open or close. Rotating halfway ensures the sealing and stability of the valve.  2. Additionally, steel materials possess a degree of elasticity, and rotating halfway prevents exceeding their elastic deformation range, which could lead to damage to the screw rod.

　　三、回半圈的作用

　　3. The Function of Half a Turn

　　1. 保证阀门的正常开启和关闭。因为闸板阀的闸板需要旋转特定的角度才能完成开启和关闭，而回半圈正好是达到这一目的的最佳角度。

　　Ensure the normal opening and closing of the valve. Since the gate of the gate valve requires a specific rotation angle to complete the opening and closing, and a half-turn is precisely the optimal angle for this purpose.

　　2. 确保阀门的密封性。阀门密封面与阀座密封面紧密接触，回半圈可以确保密封面之间能够充分接触，从而实现阀门的密封。      3. 避免阀门的损坏。如果在开启或关闭闸板阀时不回半圈，可能会导致闸板卡死或损坏，从而影响阀门的正常使用寿命。         闸板阀是一种常见的阀门，回半圈是为了保证其正常开启和关闭，从而提高阀门的密封性和稳定性，同时由于钢铁材料具有一定的弹性形变，通过回半圈的方式，可以避免阀门损坏。在使用闸板阀时，应注意其密封性和旋转角度，如有问题应及时进行维修或更换。

　　2. Ensure the sealing of the valve. The sealing surfaces of the valve and the valve seat must be in close contact. Rotating the valve back half a turn ensures full contact between the sealing surfaces, thereby achieving valve sealing.       3.  To prevent valve damage, failing to turn the gate valve back half a turn when opening or closing it may cause the gate to jam or break, thereby affecting the valve's normal service life.  The gate valve is a common type of valve, and turning it back half a turn ensures proper opening and closing, enhancing its sealing and stability. Additionally, since steel materials exhibit elastic deformation, this practice helps avoid valve damage. When using a gate valve, attention should be paid to its sealing performance and rotation angle. If issues arise, timely repair or replacement is necessary.

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