DN single hydraulic prop has large working stroke and low safety management cost. High support strength, good safety and stability. Leakage is easy to find, high safety and reliability. Long service life, easy operation and maintenance. It is widely used in supporting equipment of roadway and working face in coal mine. Because the height of the support surface is different, the lifting height of the prop is limited, in order to improve the support height of the hydraulic pillar, the extension section is generally adopted in the lower part of the prop.
Although there are various ways to connect the extended section of the hydraulic support of DN with the cylinder block, there are also disadvantages:
1, in the cylinder block and the extension of the outer cylinder set up the strengthening sleeve, the process is more complex, the manufacturing cost.
2, because of the increase of the extension section, the position of the three-use valve increased, the operation is not convenient.
3. It is difficult to install and disassemble the extension section, and some extension sections cannot be disassembled, which limits the use scope of the pillar.
As is known to all, the DN single hydraulic prop can be matched with the metal hinged roof beam to support the roof and support end of the working face of general mining and gun, and also can be used as a single point column or other temporary support. The above deficiencies hope that you can understand, in case of unnecessary damage in the use of the process. If you need, you can contact us.
