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Long-acting no-leakage plunger sealing structure for plunger type measuring pump

A technology of sealing structure and metering pump, which is applied to the components of pumping devices for elastic fluids, variable displacement pump components, pumps, etc., can solve problems such as restricting the use range of plunger type metering pumps, and achieve excellent sealing effect. , The effect of simple process structure, convenient installation and maintenance

Inactive Publication Date: 2011-06-01
HANGZHOU DACHAO PETROCHEM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This inevitable weakness greatly restricts the scope of use of plunger metering pumps.

Method used

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  • Long-acting no-leakage plunger sealing structure for plunger type measuring pump
  • Long-acting no-leakage plunger sealing structure for plunger type measuring pump
  • Long-acting no-leakage plunger sealing structure for plunger type measuring pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings.

[0021] In this embodiment, the plunger seal structure includes a stuffing box 7, a gland 12, and a compression nut 13 screwed to the stuffing box 7; the end surface of the stuffing box 7 connected to the plunger pump head 1 is provided with a built-in O-shaped Ring groove for seal ring 2.

[0022] The inside of the stuffing box 7 is a cylindrical through hole, which is equipped with a guide ring 3, a spacer ring 4 and a combined sealing sleeve 5 sequentially. The plunger 9 of the plunger type metering pump passes through the compression nut 13 and the gland in sequence. 12. Combined sealing sleeve 5, spacer ring 4 and guide ring 3; the combined sealing sleeve 5 is in the shape of a ring column, and its outer cylindrical surface is provided with an annular groove with a built-in O-shaped sealing ring 6; the inner surface of the combined se...

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Abstract

The invention relates to a hydraulic end sealing structure for a measuring pump, and aims at providing a long-acting no-leakage plunger sealing structure for a plunger type measuring pump. The plunger sealing structure comprises a stuffing box, a gland and a compression nut screwed to the stuffing box; the inner part of the stuffing box is a cylindrical through hole which is sequentially provided with a guide ring, a spacer ring and a combined sealing sleeve in a movable fit way; the plunger of the plunger type measuring pump sequentially passes through the compression nut, the gland, the combined sealing sleeve, the spacer ring and the guide ring in a movable fit way; the combined sealing sleeve is of an annular column shape, and the outer column surface of the combined sealing sleeve is provided with at least one annular groove internally provided with an O-shaped sealing ring; two annular counter bores are respectively arranged at both ends of the inner side surface of the combined sealing sleeve, and a group of O-shaped sealing ring and L-shaped sealing ring is arranged in each annular counter bore. The structure has the characteristics of constant preload force, mechanism of self-sealing action, excellent sealing effect and no leakage; the friction force between a sealing component and the plunger is very small so that the service life is long; and the technical structure is simple, and the installation and maintenance are convenient.

Description

technical field [0001] The invention relates to a liquid end sealing structure of a metering pump, in particular to a long-acting non-leakage plunger sealing structure for a plunger metering pump. Background technique [0002] The plunger seal of the existing plunger type metering pump usually adopts packing seal or shaped packing seal. [0003] The packing seal is to put the packing into the space between the stuffing box and the plunger one by one, and press the packing with a large pressing force through the gland to play a sealing role. Its disadvantages are high friction, high power consumption, fast wear of plunger packing, large leakage and short service life. The formed packing seal is to make the sealing material into an annular sealing ring. The commonly used ones are V-shaped, Y-shaped, and O-shaped. A certain pre-compression force is given to play a sealing role. The friction force of the formed packing seal is smaller than that of the packing seal, and the com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B53/02F04B13/00
Inventor 杨树东
Owner HANGZHOU DACHAO PETROCHEM EQUIP
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