SU1472620A1

SU1472620A1 - Crown bit

Info

Publication number: SU1472620A1
Application number: SU864175017A
Authority: SU
Inventors: Виктор Георгиевич Каналин; Александр Юрьевич Тремба; Евгений Соломонович Замковский; Ирина Викторовна Лебедева
Original assignee: Московский Геологоразведочный Институт Им.Серго Орджоникидзе
Priority date: 1986-12-02
Filing date: 1986-12-02
Publication date: 1989-04-15

Abstract

Изобретение относитс к горной промышленности и строительству и предназначено дл породоразрушающих инструментов. Цель - повышение эффективности бурени за счет улучшени очистки забо и предотвращени вторичного дроблени крупных частиц шлама, а также улучшени смачивани мелкодисперсной буровой пыли. Коронка содержит корпус 1 с центральным твердосплавным лезвием 5, основным промывочным каналом 2 в виде конусной полости с донной частью и боковыми промывочными каналами 3. Последние симметрично расположены относительно лезви 5 и сообщаютс с каналом 2. В корпусе 1 выполнены дополнительные наклонные промывочные каналы 4 в плоскости, параллельной лезвию и проход щей через боковые каналы 3. Последние выполнены наклонными к вертикальной плоскости, проход щей через лезвие 5, под углом 10°≤ β ≤ 20°. Диаметр каналов 4 меньше диаметра боковых каналов. Угол между боковыми каналами 3 и каналом 4 выбираетс так, чтобы встреча выход щих из них струй происходила на некотором рассто нии от забо шпура. Благодар этому достигаетс наибольша аэраци промывочного агента, сохран етс гидромониторное воздействие на породу. 4 ил.The invention relates to the mining and construction industry and is intended for rock cutting tools. The goal is to increase drilling efficiency by improving downhole cleaning and preventing the secondary crushing of large particles of sludge, as well as improving the wetting of fine drilling dust. The crown includes a housing 1 with a central carbide blade 5, a main flushing channel 2 in the form of a conical cavity with a bottom part and side flushing channels 3. The latter are symmetrically located relative to the blade 5 and communicate with channel 2. In the housing 1 additional inclined washing channels 4 are made in the plane parallel to the blade and passing through the side channels 3. The latter are inclined to the vertical plane passing through the blade 5 at an angle of 10 ° ≤ β ≤ 20 °. The diameter of the channels 4 is smaller than the diameter of the side channels. The angle between the side channels 3 and channel 4 is chosen so that the jets emerging from them meet at a certain distance from the hole. Due to this, the highest aeration of the washing agent is achieved, and the jetting effect on the rock is maintained. 4 il.

Description

фигЛfigl

Claims

Claim

A drill bit including a body with a central carbide blade 5, a main flushing channel in the form of a conical cavity with a bottom and side flushing channels symmetrically located relative to the blade and communicating with the main channel, characterized in that, in order to increase drilling efficiency due to improving the cleaning of the bottom and preventing the secondary crushing of large particles of sludge, as well as improving the wetting of fine drill dust, additional inclined flushing channels are made in the casing in a plane parallel to the blade and passing through the side channels made oblique to a vertical plane passing through the blade at an angle of 10 ° ^ β, <20 °, and the angle of inclination of the additional channels to the side channels is determined from the ratio ^arCtg 2 ( lV * and the angle bisector is inclined to the projection of the axis of rotation of the crown on the plane of the side and additional channels at an angle of 5 6 at 610, while the diameter of the additional channels is smaller. more than the diameter of the side channels, where B is the diameter of the main channel in the bottom;

L is the distance from the bottom of the main channel to the edge ^ of the blade;

h is the value of the introduction of the blade into the rock.

srig. 3 fig 2 figa