Solid medium contained plunger pump stuffing sealing device

Abstract

The invention relates to a solid medium contained plunger pump stuffing sealing device which comprises a plunger, a main stuffing press cover, a stuffing body, an outlet one-way valve, a flushing fluid pipe, an auxiliary stuffing press cover, an auxiliary stuffing box, an O-shaped ring, an inlet one-way valve, a main stuffing box, a flushing fluid guide ring and an isolated body. The stuffing body is coated at the periphery of the plunger, the front end of the stuffing body is connected with a pump head, the rear end is connected with a power part, the isolated body is arranged between the inside of the stuffing body and the plunger, the isolated body is of a tooth slot-shaped structure, and the flushing fluid guide ring is arranged behind the isolated body. The stuffing body and the plunger are sealed through the main stuffing box, the main stuffing box is compressed through the main stuffing press cover, the main stuffing press cover is in threaded connection with the stuffing body, and the main stuffing press cover is sealed through an O-shaped seal ring. The main stuffing box is a plurality of groups of stuffing which is formed by alternately assembling a packing and a lined ring, and performs an absolute sealing action on a pump conveying medium. The main stuffing press cover and the plunger are sealed through the auxiliary stuffing box, and the auxiliary stuffing box is compressed through the auxiliary stuffing press cover.

Description

technical field [0001] The invention relates to the field of packing sealing used in petroleum, chemical industry, coal chemical industry, food, etc., in particular to a packing sealing device of a plunger pump containing solid medium. Background technique [0002] In the coal liquefaction process, the delivery medium of the coal-water slurry and oil-coal slurry feed pump contains a large amount of coal powder particles, and the mud delivered by the drilling plunger pump used in the oil field contains a large amount of broken rock particles, and the delivery medium of the oilfield water injection pump Also contains a lot of sediment. During the operation of the plunger pump under the above working conditions, the solid particles in the conveying medium are easy to wear the plunger and packing, making the pump seal easy to leak, resulting in the pump not working normally, and frequent replacement of packing, affecting normal production. [0003] Chinese Patent Publication No...

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Problems solved by technology

Its structure is relatively complicated, the production cost is hig

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