CN-116927664-B - Coal rock drilling deep hole jet nozzle with supporting and guiding functions

CN116927664BCN 116927664 BCN116927664 BCN 116927664BCN-116927664-B

Abstract

The invention discloses a coal rock drilling deep hole jet nozzle with supporting and guiding functions, which comprises a nozzle, a drill rod, a sleeve and a telescopic expansion type guiding and supporting mechanism, wherein the sleeve is coaxially sleeved at the front part of the excircle of the drill rod, an annular cavity is formed between the inner circle of the sleeve and the excircle of the drill rod, the nozzle is coaxially arranged at a front port of the drill rod, the nozzle is positioned in the sleeve, the telescopic expansion type guiding and supporting mechanism is coaxially arranged on the drill rod, the front side of the telescopic expansion type guiding and supporting mechanism is fixedly connected with the rear end of the sleeve, and the rear end of the telescopic expansion type guiding and supporting mechanism is fixedly connected with the excircle of the drill rod. The invention has scientific principle, simple structure, easy processing and low cost, and can ensure the distance between the jet core section of the nozzle and the sleeve and play a certain supporting role on the drill rod and the hole wall when the water jet coal rock breaking is carried out.

Inventors

FAN JUNJIE
GUO CHAOJIE
YUAN RUIFU
SUN RUIJIA
YUAN YONGLIANG

Assignees

河南理工大学

Dates

Publication Date: 20260508
Application Date: 20230706

Claims (5)

1. The coal rock drilling deep hole jet nozzle with the supporting and guiding functions is characterized by comprising a nozzle, a drill rod, a sleeve and a telescopic expansion type guiding and supporting mechanism, wherein the sleeve is sleeved on the front part of the excircle of the drill rod in the same axial direction, an annular cavity is formed between the inner circle of the sleeve and the excircle of the drill rod, the nozzle is coaxially arranged at a front port of the drill rod, the nozzle is positioned in the sleeve, the telescopic expansion type guiding and supporting mechanism is coaxially arranged on the drill rod, the front side of the telescopic expansion type guiding and supporting mechanism is fixedly connected with the rear end of the sleeve, and the rear end of the telescopic expansion type guiding and supporting mechanism is fixedly connected with the excircle of the drill rod; The telescopic expansion type guiding supporting mechanism comprises a front supporting limiting ring, a rear supporting limiting ring, a spring, a baffle ring, a guide wheel assembly and a plurality of elastic supporting pull rods, wherein the front supporting limiting ring, the spring, the rear supporting limiting ring, the guide wheel assembly and the baffle ring are sequentially sleeved on a drill rod from front to back, the elastic supporting pull rods are uniformly distributed along the circumferential direction of the drill rod, the front end and the rear end of each elastic supporting pull rod are respectively fixedly connected with the front supporting limiting ring and the rear supporting limiting ring, the front end and the rear end of the spring are respectively in crimping connection with the front supporting limiting ring and the rear supporting limiting ring, the front end of the front supporting limiting ring is fixedly connected with the rear end of a sleeve, the guide wheel assembly is fixedly connected with the drill rod, the baffle ring covers the guide wheel assembly, and the front end of the baffle ring is fixedly connected with the rear supporting limiting ring.
2. The deep hole jet nozzle for coal and rock drilling with supporting and guiding functions as set forth in claim 1, wherein the guide wheel assembly includes one shaft collar sleeved on the outer circumference of the drill rod, and the shaft collar has several shafts in the outer circumference, each shaft has one roller in the radial direction of the shaft collar, and the diameter of the roller is greater than the width of the shaft collar.
3. A jet nozzle with supporting and guiding functions for deep hole drilling of coal and rock is characterized in that an annular supporting guide plate sleeved on the outer circle of a drill rod is fixedly arranged in a sleeve.
4. The coal rock drilling deep hole jet nozzle with supporting and guiding functions according to claim 1 or 2 is characterized in that the nozzle is of a cylindrical structure with an open rear end, the inner circle of the rear end opening of the nozzle is in threaded connection with the outer circle of the front end of a drill rod, and a plurality of jet spray holes are uniformly formed in the front end plate of the nozzle.
5. The deep hole jet nozzle for coal and rock drilling with supporting and guiding functions as claimed in claim 4, wherein the front side of the sleeve is uniformly provided with a plurality of drainage holes along the circumferential direction.

Description

Coal rock drilling deep hole jet nozzle with supporting and guiding functions Technical Field The invention belongs to the technical field of mining drilling tools, and particularly relates to a jet nozzle with supporting and guiding functions for deep holes in coal rock drilling. Background With the rapid development of industry, the demand for resources, in particular for combustible energy sources, such as coal or oil exploitation, is increasing. The high-pressure injection technology is a technology widely applied to the fields of industry, fire protection and the like. The basic principle of high-pressure water jet is that ordinary tap water is pressurized to high water pressure by a booster pump, a pressure regulator and other devices, and then the water flow reaches extremely high speed and pressure by a nozzle, so that objects are treated. In the coal mine industry, the high-pressure water jet is widely applied to coal rock fracturing, coal rock drilling and the like, compared with mechanical drilling and hydraulic crushing drilling, the hydraulic fracturing drilling has the advantages of good pressure relief and permeability increasing effects, improvement of the pressure in a coal bed and the like, and the water jet drilling has the advantages of environmental protection, no pollution, convenience in use, economy, environmental protection and the like. The underground coal rock drilling of the coal mine mainly uses a hydraulic impact drilling method, a mechanical drilling method, a water jet drilling method and the like. Because the conditions such as a hydraulic impact drilling method, a mechanical drilling method and the like are more limited, more energy and equipment are required to be consumed, and high-pressure water jet drilling is an important method for deep hole drilling of coal and rock in a coal mine. However, the existing water jet nozzle is complex, the coal rock crushing efficiency is low, the drilling guidance is poor, and the large-scale use of the coal rock jet nozzle in a coal mine is limited. Disclosure of Invention In order to solve the defects of the prior art, the invention provides the coal rock drilling deep hole jet nozzle with the supporting and guiding functions, which can achieve high jet impact force, crush coal rock with high hardness, accurately control the drilling diameter and avoid the influence on the surrounding environment. Not only can consume less energy when coal rock drilling work, the security is high, but also can play certain support direction effect when coal rock drilling. In order to solve the technical problems, the technical scheme is that the coal rock drilling deep hole jet nozzle with the supporting and guiding functions comprises a nozzle, a drill rod, a sleeve and a telescopic expansion type guiding and supporting mechanism, wherein the sleeve is coaxially sleeved at the front part of the outer circle of the drill rod, an annular cavity is formed between the inner circle of the sleeve and the outer circle of the drill rod, the nozzle is coaxially arranged at a front port of the drill rod, the nozzle is positioned in the sleeve, the telescopic expansion type guiding and supporting mechanism is coaxially arranged on the drill rod, the front side of the telescopic expansion type guiding and supporting mechanism is fixedly connected with the rear end of the sleeve, and the rear end of the telescopic expansion type guiding and supporting mechanism is fixedly connected with the outer circle of the drill rod. The telescopic expansion type guiding supporting mechanism comprises a front supporting limiting ring, a rear supporting limiting ring, a spring, a baffle ring, a guide wheel assembly and a plurality of elastic supporting pull rods, wherein the front supporting limiting ring, the spring, the rear supporting limiting ring, the guide wheel assembly and the baffle ring are sequentially sleeved on a drill rod from front to back, the elastic supporting pull rods are uniformly distributed along the circumferential direction of the drill rod, the front end and the rear end of each elastic supporting pull rod are respectively fixedly connected with the front supporting limiting ring and the rear supporting limiting ring, the front end and the rear end of the spring are respectively in crimping connection with the front supporting limiting ring and the rear supporting limiting ring, the front end of the front supporting limiting ring is fixedly connected with the rear end of a sleeve, the guide wheel assembly is fixedly connected with the drill rod, the baffle ring covers the guide wheel assembly, and the front end of the baffle ring is fixedly connected with the rear supporting limiting ring. The guide wheel assembly comprises a shaft collar sleeved on the outer circle of the drill rod, a plurality of wheel shafts are uniformly arranged on the outer circle of the shaft collar, the central line of each wheel shaft is arranged along the radial direction o