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Rear mixing type self-excited oscillation pulse abrasive nozzle and production method thereof

A self-excited oscillation, post-mixing technology, applied in abrasives, spray guns, explosion generating devices, etc., can solve the problems of poor pressure transformation characteristics and cavitation, large loss along the jet flow, long abrasion time, etc. The effect of small process loss, reduced abrasion time and less accumulation

Active Publication Date: 2015-01-28
克拉玛依市金牛工程建设有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a post-mixing self-excited oscillation pulse abrasive nozzle and its production method, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the abrasion time of the abrasive jet ejected from the front-mixing abrasive nozzle on the transport pipe wall Long, the loss of the jet flow is large, and the abrasives are easy to accumulate in the front mixing chamber, which will cause pipeline blockage; and the pressure changing characteristics and cavitation are poor, and the work efficiency is low.

Method used

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  • Rear mixing type self-excited oscillation pulse abrasive nozzle and production method thereof
  • Rear mixing type self-excited oscillation pulse abrasive nozzle and production method thereof

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Embodiment 1

[0019] Embodiment 1: as attached figure 1 As shown, the post-mixing self-excited oscillating pulse abrasive nozzle includes an upstream seat body 1, a midstream seat body 2, a downstream joint 6 and a diversion sleeve 7; the lower end of the upstream seat body 1 is fixedly connected to the upper end of the midstream seat body 2; There are corresponding grooves on the lower part of the upstream seat body 1 and the upper part of the midstream seat body 2 to form an annular jet cavity 3, and the upper part of the upstream seat body 1 and the lower part of the midstream seat body 2 communicate with the jet fluid cavity 3 respectively. The upper through hole 4 and the lower through hole 5, the lower through hole 5 is a stepped hole with a narrow top and a wide bottom; a downstream joint 6 is fixedly connected to the lower end of the midstream seat body 2, and an annular flow guide sleeve is arranged at the upper end of the downstream joint 6 The installation slot, the guide slee...

Embodiment 2

[0026] Embodiment 2: The production method of the post-mixing self-excited oscillating pulse abrasive nozzle: first, mix and grind 300 to 1200 mesh tungsten carbide powder and cobalt powder evenly, and the weight percentage of tungsten carbide powder and cobalt powder is 94% to 96%; Then inject 5% to 15% by weight of the butadiene rubber solution and stir it evenly into granules, put it into the mold according to the required weight, and press it with a pressure of 1 to 3 tons per cubic centimeter; The body and the midstream seat are pre-fired to 800°C and held for 0.5 to 1 hour, then cooled to below 200°C, and then the upstream seat and the midstream seat are sintered at a high temperature of 1420°C to 1450°C, kept for 1 to 2 hours and then lowered. Take it out below 280°C for mechanical finishing.

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Abstract

The invention relates to a self-excited oscillation pulse abrasive nozzle, in particular to a rear mixing type self-excited oscillation pulse abrasive nozzle and a production method thereof; the rear mixing type self-excited oscillation pulse abrasive nozzle comprises an upper seat body, a middle seat body, a lower seat body and a diversion sleeve, wherein the lower end of the upper seat body is fixedly connected with the upper end of the middle seat body; corresponding grooves are respectively arranged at the lower part of the upper seat body and the upper part of the middle seat body and form an annular jet-flow cavity; an upper through hole and a lower through hole which are communicated with the jet-flow cavity are arranged at the upper part of the upper seat body and the lower part of the middle seat body; and the lower through hole is a stepped hole with a narrow upper part and a wide lower part. The self-excited oscillation pulse abrasive nozzle is reasonable and compact in structure and is convenient to use; by adopting the jet flow of abrasives injected by the rear mixing type self-excited oscillation pulse abrasive nozzle, the time of abrading the wall of a transporting pipe is reduced; the jet flow has small loss along the journey way, does not easily accumulate and can prevent pipelines from being blocked; meanwhile, the jet flow form of self-excited oscillation pulses is applied to make the voltage transformation characteristic and the effect of cavitation be enhanced, thereby the operating efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of self-excited oscillating pulse abrasive nozzles, and relates to a post-mix self-excited oscillating pulse abrasive nozzle and a production method thereof. Background technique [0002] Abrasive jet is a liquid-solid two-phase medium jet formed by mixing abrasives with high-speed flowing water or high-pressure water. It is currently the most widely used abrasive jet; and the abrasive nozzle is the key to forming the abrasive jet. The abrasive nozzle is The mixing method is divided into two forms: pre-mixing and post-mixing; while the abrasive jet ejected from the front-mixing abrasive nozzle has a long abrasive time on the transport pipe wall, the loss of the jet along the process is large, and the abrasive is easy to accumulate in the front mixing chamber. , will cause pipeline blockage; especially in the surface engineering of oil and gas fields, oil tanks, sewage settling tanks and other oil gathering a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24C5/04B22F3/16B22F5/10
Inventor 赵江赵显钧王斌
Owner 克拉玛依市金牛工程建设有限责任公司