The importance of hydraulic valve blocks in hydraulic systems has been known by more and more people, and its application range is more and more extensive. Is it good? Today we will use the following introduction to understand the relevant contents of the hydraulic valve block. Hydraulic valve block Hydraulic valve is an automatic component operated by pressure oil. It is controlled by the pressure oil of the pressure regulating valve. It is usually used in combination with the electromagnetic pressure regulating valve. It can be used to remotely control the oil, gas and water pipeline systems of hydropower stations. On and off. The core component of the hydraulic valve is the hydraulic valve block. The hydraulic valve block plays an important role in controlling the direction, pressure and flow of the liquid flow in the hydraulic valve. The use of hydraulic valve blocks not only simplifies the planning and equipment of the hydraulic system, but also facilitates the integration and standardization of the hydraulic system, which is conducive to reducing manufacturing costs, improving accuracy and reliability. Hydraulic valve block manufacturing 1. The surface roughness of the equipment valve and flange on the hydraulic valve block should reach Ra0.4, and the surface roughness of the sealing surface of the end pipe joint should reach Ra3.2. In addition, the straightness tolerance between the screw hole of the equipment fitting and the outer fitting surface should be at least 8 steps. 2. All screw holes on the valve block should have machining precision requirements. Generally, 7H is selected. The machining accuracy of the equipment hole of the threaded cartridge valve should meet the requirements of the product sample. The roughness of the hole of the cartridge valve device is Ra0.8. In addition, there are dimensional tolerances and geometric tolerance requirements. The surface roughness of the 0-ring groove is Ra3.2, and the surface roughness of the general flow channel is Ra12.5. 3, high pressure valve block is best to use 35 forged steel, the general valve block uses A3 steel or ductile iron, when cutting the valve block material from the plate with gas cutting, should have a satisfactory machining allowance, preferably the valve block The blank is processed after casting. The material of the processing valve block needs to ensure the internal structure is fine, and there are no defects such as interlayer and trachoma. If necessary, the blank should be inspected. Cast iron blocks and larger steel blocks should be aged and pretreated before processing. Hydraulic valve block planning attention matters 1, hydraulic valve block planning, the oil circuit should be as simple as possible, try to reduce deep holes, inclined holes and process holes. The diameter of the valve block should match the flow rate. In particular, it should be noted that the through hole must ensure a satisfactory flow area. Pay attention to the direction and orientation of the inlet and outlet, and match the overall arrangement of the system and the pipe connection. Considering the processability of the equipment operation, there are components required by straight or horizontal equipment, it is necessary to ensure that the equipment meets the requirements. 2. Regarding the components that need to be conditioned during work, the convenience of operation and observation should be considered during planning. For example, adjustable components such as relief valves and speed control valves should be placed in the orientation of the conditioning handle for easy operation. 3. Components and critical components such as proportional valves and servo valves that need to be frequently repaired should be above or outside the valve block for easy assembly and disassembly. In addition, in the valve block planning, the number of pressure measuring points should be set for the valve block to be used for debugging. For the valve block with weight more than 30kg, the lifting screw hole should be set, but the volume of the valve block should be satisfied on the premise of meeting the application requirements. Try to be as small as possible.