CN2036204U

CN2036204U - Valveless void core taking multipurpose hole hammer

Info

Publication number: CN2036204U
Application number: CN 88203760
Authority: CN
Inventors: 李仲元; 雷培德; 陈镇球; 康永春
Original assignee: Zhejiang Jiaxing Metallurgical Machinery Works; Research Team Of Hydrogeology Engineering Geology And Technical Methods For Geology And Mineral Resources
Current assignee: Zhejiang Jiaxing Metallurgical Machinery Works; Research Team Of Hydrogeology Engineering Geology And Technical Methods For Geology And Mineral Resources
Priority date: 1988-03-05
Filing date: 1988-03-05
Publication date: 1989-04-19

Abstract

The utility model relates to a valveless void core taking multipurpose hole hammer which is suitable for various bedrock strata geological exploration. Massive cores are taken by the driving energy of compressed air; auger lifting coring, wire-line coring, and double-wall drill pipe reverse circulation continuous coring can be realized. The valveless void core taking multipurpose hole hammer comprises an impactor of a universal joint, a lengthening core barrel and a lengthening outer shell, and a drill bit. The utility model has the advantages of simple structure, few wearing parts, high efficiency, and low consumption. When the drilling is on the 7 stage crushing dolomite geology, mean-hour footage is 16.74 meter, and the core recovery percent is more than 80%. Compared with the existing conventional rotary drilling, aging is improved about 9 times. The utility model can work in deep water.

Description

Valveless void core taking multipurpose hole hammer

How the valveless hollow type gets core with the down-the-hole hammer, is applicable to the stratum geological prospecting of various basement rock, can take the drilling tool of block core with compressed air-driven.

Down-the-hole hammer drill advances, and is a kind of efficient drilling method, has multiple down-the-hole hammer product to sell both at home and abroad, but this series products is and creeps into the down-the-hole hammer comprehensively, can only take landwaste, can't take block core, can not satisfy the requirement of geology investigation and prospecting better.

It is a kind of simple in structure that the purpose of this utility model is to provide, few easy workout part, and airway unobstructed can be taked the drilling tool of block core.Can realize carrying and drill through core, the anti-continous sampling that circulates of wire line coring and double-wall drill pipe.

This utility model is by universal joint, the lengthening core barrel, and impactor and drill bit two parts of lengthening outer shell are formed.Comprise universal joint, the ring-type check (non-return) valve, the hollow structure piston is furnished with outer cylinder sheath, outer shell, the core barrel of entering and exhaust channel, and the card drill sleeve has the first-class critical piece of core drill of straight hole shape core passage.Universal joint extends between outer shell, coupling sleeve, outer shell, the card drill sleeve with thread connection.Drill bit adopts the double self-locking splined of doing exhaust duct with the card drill sleeve.

It is many with down-the-hole hammer vertical section schematic diagram that accompanying drawing valveless hollow type is got core.

How the accompanying drawings the purpose of this utility model realizes, the impactor part is by universal joint 1, lengthening outer shell 22, coupling sleeve 5, outer shell 19, card drill sleeve 20 is connected into one, pressure-air is by universal joint 1, check (non-return) valve 2 and garden ring-type check (non-return) valve 3 enter annular space air flue and the air intake duct 7 on the outer cylinder sheath 6 and the air inlet 8 of 5 of lengthening core barrel 4 and coupling sleeves, on piston 9, allow compression 10, outer cylinder sheath 6 inboard air intake ducts 11 down enter lower chamber 12, it is up that pressure-air promotes piston 9, and this moment, upper chamber 15 was by upper air-vent 16 exhaust that communicates with the external world.Piston 9 moves to air intake duct 11 under the sealing at

core barrel

13 and 6 of outer cylinder sheaths, lower chamber 12 stops air inlet, pressure-air expands, promote piston 9 and continue upwards operation, piston 9 is with upper air-vent 16 sealings of outer cylinder sheath 6 simultaneously, and low-pressure air is compressed in the upper chamber 15, piston 9 runs to when allowing compression 10 and outer cylinder sheath 6 inboard last air intake ducts 14 communicate, pressure-air enters upper chamber 15, and simultaneously the following steam vent 17 on the outer cylinder sheath 6 is opened, lower chamber 12 exhaust that communicates with the external world.It is zero that the piston deceleration goes upward to speed.So far hold journey on the piston and finish, change impact stroke over to.

At this moment, upper chamber 15 is the high pressure admission state, and lower chamber 12 is the exhaust low-pressure state.Under last lower chamber differential pressure action, piston 9 quickens descending, when piston 9 will be gone up

air intake duct

14 and 17 sealings of following steam vent, upper chamber 15 inner high voltage air expand, low-pressure air is compressed in the lower chamber 12, at this moment, upper chamber 15 internal gas pressures are higher than the air pressure of lower chamber 12, piston 9 dashes under continuing to quicken, when air intake duct 11 and upper air-vent 16 were opened instantly, lower chamber 12 changed the air inlet state over to, and 15 of upper chambers are exhaust, piston 9 slows down still slightly with high speed impact drill bit 21 afterbody anvil faces, and most of impact energy is passed to drill bit 21 fractured rocks.After the impact, piston 9 is upspring to change over to and is held journey, enters working cycles next time.21 times catalase faces of drill bit are ring-type, and middle core part enters core barrel 13 and lengthening core barrel 4 by drill bit core passage and collected and protect, and realizes getting the core purpose.

In the time of at the bottom of drilling tool is lifted from the hole, for thoroughly preventing " empty beat " phenomenon, the utility model bottom in outer cylinder sheath 6 is provided with the boss 18 of dying, with cut-out lower chamber 12 intake channels.

The utility model removes universal joint 1, and check (non-return) valve 2 behind the changing-over double-wall drill pipe joint, can carry out wire line coring and creep into anti-circulation continous sampling and creep into.Using comprehensive Drilling bore bit instead can creep into comprehensively, uses reaming bit instead and can carry out reaming.

This down-the-hole hammer important technological parameters:

Bit diameter 165-170 millimeter

70 millimeters of core through-hole diameters

It is variable to hold core length 2500() millimeter

When blast is the 0.5-0.9 MPa

Single strike work 100-200 Jiao Er

Frequency of impact 14-20 hertz

Blast consumption 5-8 cubic meter/minute

Flat φ 89 or 114/70 millimeter double-wall drill pipe in the adapted drilling rod

The utility model is in 7 grades of broken dolomite drilling constructions, mean hours 16.74 meters on drilling depth, with existing conventional rotary drilling with mean hours 2 meters on drilling depth compare, improve about 8 times of timeliness, core recovery is more than 80%, in same boring dark 155 meters, during high 90 meters of water column, creep into 1.6 meters, with 5 minutes, 19.2 m/hs of timeliness, core recovery 81%.

Claims

1, a kind of down-the-hole of compressed air-driven hammer, it is characterized in that by universal joint, impactor and drill bit two parts of lengthening core barrel, lengthening outer shell are formed, universal joint is used for the connection of impactor and adapted drilling rod, impactor is passed to the drill bit fractured rock to the kinetic energy that compressed-air actuated potential energy converts piston to, impactor and drill bit adopt the double self-locking splined of doing exhaust duct, core barrel in the drill bit straight hole, impactor and lengthening core barrel constitute the independently hollow core passage that does not communicate with air flue.

2, by the described down-the-hole of claim 1 hammer, it is characterized in that impactor is by the ring-type check (non-return) valve, the hollow structure piston is furnished with the outer cylinder sheath of entering and exhaust channel, outer shell, and core barrel, the card drill sleeve is formed.

3, by the described outer cylinder sheath of claim 2, it is characterized in that air intake duct all is arranged on the outer cylinder sheath.

4, by the described impactor of claim 2, it is characterized in that the boss of dying is arranged at the bottom in the outer cylinder sheath, its effect is to prevent " empty beating ".

5, by the described hollow structure piston of claim 2, it is characterized in that it is reciprocating in core barrel and outer cylinder sheath.

6,, it is characterized in that airless passes through in above-mentioned two pipes, and obtain holding in its of the block core that is obtained and protect by described core barrel of claim 1 and lengthening core barrel.

7, by the described drill bit of claim 1, it is characterized in that adopting double self-locking spline and the impactor of doing exhaust duct to connect, be convenient to loading and unloading, make full use of the space, increase drill bit intensity.

8, by claim 1,2 described down-the-holes hammer, it is characterized in that removing universal joint, check (non-return) valve, behind the changing-over double-wall drill pipe joint, can carry out wire line coring and creep into anti-circulation continous sampling and creep into.

9,, it is characterized in that using instead comprehensive Drilling bore bit and can creep into comprehensively or use instead reaming bit and carry out reaming by the described down-the-hole of claim 1 hammer.