A split-type double-disc regulating valve and its use method

Abstract

The invention relates to a split type double-valve-flap adjusting valve and a using method thereof. The using method of the split type double-valve-flap adjusting valve comprises the steps that 1, a sealing test is carried out, when the valve is in a closed state, a test medium is introduced from an inlet channel, and whether leakage happens to an outlet channel or not is observed; 2, if a seal isnot formed between the sealing surface of a lower valve flap and the sealing surface of a lower valve base, a locking device is loosened, an adjusting sleeve is rotated clockwise to drive an adjusting rod to rotate clockwise, a lower valve rod and the lower valve flap are controlled to move downwards until the sealing surface of the lower valve flap and the sealing surface of the lower valve baseare sealed, and a locking device is used for locking the adjusting sleeve; 3, if no seal is formed between the sealing surface of an upper valve flap and the sealing surface of an upper valve base, the locking device is loosened, the adjusting sleeve is rotated anticlockwise, the upper valve flap is controlled to move downwards until the sealing surface of the upper valve flap and the sealing surface of the upper valve base form the seal, and the locking device is used for locking the adjusting sleeve; 4, the valve which is qualified in the test is installed on a pipeline. The valve has the advantages of being convenient to adjust and high in adjusting precision.

Description

technical field [0001] The invention relates to a regulating valve, in particular to a method for using a split-type double disc regulating valve. Background technique [0002] The double-seat regulating valve mainly includes: valve body, upper valve seat, lower valve seat, upper valve disc, lower valve disc, the valve body is equipped with inlet channel and outlet channel, the inlet channel is arranged horizontally, and the outlet channel is in a horizontal Y-shaped structure Set, between the inlet channel and the outlet channel, there is a cavity wall with a horizontal U-shaped structure, the upper valve seat is set on the upper part of the cavity wall, the lower valve seat is set on the lower part of the cavity wall, and the upper ends of the upper and lower valve seats are respectively provided with upper and lower valve seats. The sealing surface of the lower valve seat, the upper and lower valve discs are fixed in series at the lower part of the valve stem, the lower v...

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Problems solved by technology

[0002] The double-seat regulating valve mainly includes: valve body, upper valve seat, lower valve seat, upper valve disc, lower valve disc, the valve body is equipped with inlet channel and outlet channel, the inlet channel is arranged horizontally, and the outlet channel is in a horizontal Y-shaped structure Set, between the inlet channel and the outlet channel, there is a cavity wall with a horizontal U-shaped structure, the upper valve seat is set on the upper part of the cavity wall, the lower valve seat is set on the lower part of the cavity wall, and the upper ends of the upper and lower valve seats are respectively provided with upper and lower valve seats. The sealing surface of the lower valve seat, the upper and lower valve discs are fixed in series at the lower part of the valve stem, the lower valve stem is set between the upper and lower valve discs, the upper valve disc is set on the upper part of the outlet channel, and the lower valve disc is set on the inlet channel. There are upper and lower valve disc sealing surfaces in the middle of the upper and lower valve discs respectively. By moving the upper valve stem up and down, the distance between the upper and lower valve disc sealing surfaces and the upper and lower valve seat sealing surfaces can be controlled respectively, thereby The function of regulating the outlet pressure and flow of the valve is that due to the influence of processing errors and assembly, when the upper valve stem is moved, the distance between the sealing surface of the upper disc and the sealing surface of the upper valve seat cannot be compared with that of the lower disc. The distance between the sealing surface and the sealing surface of the lower valve seat is the same. When the valve needs to be closed, the fully sealed state cannot be achieved, and the leakage is large. At the same time, the upper valve disc and the lower valve disc are fixedly arranged, which is difficult to process and high in cost. technical flaws

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