Integrated combination valve

Abstract

The invention provides an integrated combined valve. The integrated combined valve comprises a handle, a packing gland, a first valve rod, a semicircular sleeve, a valve deck, a valve body, an upper vale seat, a second valve rod, a third valve rod, a lower valve seat, a blow-down valve, a base, a cylindrical pin, combined packing and a riveting pin. The semicircular sleeve is connected with the first valve rod and the second valve rod. The cylindrical pin is connected with the second valve rod and the third valve rod. Air holes and a seal surface are designed on an upper valve seat body, and the upper valve seat body is mounted in an inner cavity of the valve body. A seal surface is designed on a lower valve seat body, and the lower valve seat is mounted in the inner cavity of the valve body and located under the upper valve seat. The upper valve seat and the lower valve seat are coaxially mounted in a matched mode. The base is assembled at the bottom of the valve body. The valve deck is connected with the valve body in a threaded mode and coaxially connected with the upper valve seat in a floating mode. The riveting pin is assembled on the valve body. The first valve rod is connected with the packing gland. The handle is fixedly mounted on the first valve rod. By adoption of the integrated combined valve, the defects of a three-valve set are overcome, the structure is simple, operation is convenient, and accidents caused by an incorrect stop valve opening sequence are avoided.

Description

Technical field: [0001] The invention relates to the technical field of valve bodies used in industrial process control, in particular to an integrated combination valve that can replace the traditional three-valve group. Background technique: [0002] In industrial process control, the traditional three-valve group is a needle valve consisting of a valve body, two globe valves and a balance valve. [0003] Three valve group use: [0004] The operating procedure when put into operation: first, open the balance valve, then open the two blowdown valves, then slowly open the two shut-off valves to remove the air or dirt in the pressure guiding pipe, and close the two blowdown valves, which is blowdown . Then close the balance valve, and the differential pressure gauge can be put into operation. [0005] Operation procedure for online calibration of differential pressure gauge zero point: directly connect with the transmitter through the flange. [0006] The operating proced...

AI Technical Summary

Problems solved by technology

[0007] The traditional three-valve group has the following defects: the range of the differential pressure gauge is generally 0-6kPa, which is far lower than the pipeline fluid pressure, its own overload capacity is not strong, and it is easy to be damaged. Operation and maintenance must be carried out in strict accordance with the operating procedures, otherwise it will cause equipment damage. Damage or major personal injury

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