CN203321313U

CN203321313U - Down-hole hammer

Info

Publication number: CN203321313U
Application number: CN2013203800616U
Authority: CN
Inventors: 龚康强; 孙超
Original assignee: YICHANG WOOKE SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: YICHANG WOOKE SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2013-06-28
Filing date: 2013-06-28
Publication date: 2013-12-04
Anticipated expiration: 2023-06-28

Abstract

The utility model discloses a down-hole hammer which comprises a rear joint, an outer sleeve, a front joint and a drill bit which are sequentially connected at the exterior of the down-hole hammer, wherein a check valve and a gas distribution rod are arranged at the part, close to the rear joint, of the interior of the outer sleeve; the gas distribution rod is provided with a gas distribution rod big end and a gas distribution rod small end; the check valve is partially positioned in the gas distribution rod big end; a composite disc spring and a pedestal are arranged between the gas distribution rod and the rear joint; an inner cylinder and a piston are also arranged in the outer sleeve; the gas distribution rod realizes a gas distribution action for the piston movement together with the outer sleeve, inner cylinder and piston of the hammer, the energy of a compressed gas is converted into the kinetic energy of mechanical motion through the movement of the piston, and then the kinetic energy can be transferred to the drill bit through a collision mode to realize the functions of the down-hole hammer. The down-hole hammer disclosed by the utility model has the advantages of reasonable structure and gas line design, high working efficiency and long service life.

Description

A kind of down-the-hole air hammer

Technical field

The utility model relates to a kind of pneumatic impact equipment, is specially a kind of down-the-hole air hammer.

Background technology

The valveless type down-the-hole air hammer is a kind of typical pneumatic impact equipment, and it is the drilling tool of down-the-hole drill, is the operating mechanism that rig is implemented boring.This equipment is mainly used in Drilling diameter 65-305mm, hole depth 60m driling explosion hole.The drilling efficiency of a down-the-hole drill depends on the performance of impactor to a great extent.At present, the valveless down-the-hole air hammer used on market is the Mission series piston-guide-sleeve-type valveless single-cylinder structure down-the-hole air hammer that a kind of Sweden Sandvik rice Shengong department is representative, as shown in Figure 1.

There is following defect in Mission series valve free impacter:

1, distribution bar, valve seat and rear joint are rigidly connected by the lateral pin mode, even fracture of the early stage easily distortion of lateral pin; And the hole requirement on machining accuracy coordinated with lateral pin is high, be difficult for guaranteeing, handling are inconvenient.

2, its distribution bar is longer, and has the injection well that area is larger, adopts ralocatable mode work, the early fracture phenomenon easily occurs, reliability while reducing impactor work.

3, this impactor has more intake and exhaust road, easily causes larger atmospheric pressure lost; Particularly on piston, have more distribution duct, air flue turnover and distance are long, and pressure loss is large, make it responsive to the heat treatment reaction, and stress is concentrated, and work is often because of technique and structural reason early damage.

Summary of the invention

The purpose of this utility model provides a kind of down-the-hole air hammer, and structure and gas circuit are reasonable in design, high efficiency, long service life.

In order to solve the problems of the technologies described above, the technical solution of the utility model is: a kind of down-the-hole air hammer, comprise rear joint, outer tube, front connector that its outside connects successively, described front connector connects drill bit, be provided with non retern valve and distribution bar near rear joint in outer tube, the distribution bar is provided with distribution bar major part and distribution bar microcephaly, and non retern valve partly is positioned at distribution bar major part, is provided with compound dish spring and base between distribution bar and rear joint, also be provided with inner casing and piston in outer tube, can form air supply channel between the interior inside wall of cylinder and piston outer wall, piston is provided with the large end of piston and piston small end, distribution bar microcephaly is positioned at the rear gas chamber of the large end of piston, distribution bar microcephaly can coordinate with the piston centre porosity formation shutoff, outer tube is inboard forms annular chamber with the inner casing outside, form piston body surface air supply chamber and circular passage between piston and outer tube, the piston small end can contact with drill bit, also be provided with fairlead between piston small end and outer tube, air chamber before forming between fairlead and outer tube and piston, drill bit is provided with the bit central pore.

Distribution bar of the present utility model and air inlet seat are integrated, except compressed air is introduced cylinder body, also same cylinder body, piston are realized the distribution action of piston movement together, and by the power conversion of Compressed Gas, be mechanical movement kinetic energy by the motion of piston, then kinetic energy is passed to drill bit by the mode of colliding and realize function of the present utility model.

The utlity model has following beneficial effect:

1, distribution bar and check valve seat are integrated, and function simple in structure, as can to realize location, vibration damping, air inlet is reliable and stable during work; And the distribution bar has dwindled diameter of axle ratio, be easy to processing, be difficult for deformation and fracture when work; Gas distribution channels is succinctly unobstructed, thereby has reduced the loss of energy; The large end of distribution bar is contained in the stepped hole of inner casing one end, and rear joint directly is pressed on the large end face of inner casing and distribution bar and forms and be rigidly connected, thus jumping while having avoided the work of distribution bar, and the high-precision cooperation of maintenance that can be permanent, guaranteed operating efficiency.

2, on piston, the boring number is few, diameter of axle variation is less, and the stress in the time of transmitting more stably impactor work, improve working life; Without cellular type structure radially, can realize that Compressed Gas arrives respectively forward and backward air chamber by short line, has improved the efficiency of impactor on piston; Beyond the Great Wall duct few, without turn back duct, without elongated hole, easy to process, working (machining) efficiency is high, without deep Hole.

3, be provided with compound dish spring and base between rear joint and distribution bar, thereby realized that rear joint and inner casing and distribution bar are that rigidity compresses, and have guaranteed the stability of mechanism.Adopt the compound dish spring of the formula innovative design that is combined as a whole of large saucer spring, see Fig. 3.Guaranteed that rigidity compresses simultaneously the vibration can also the work of impact-absorbing device the time.

4, gas circuit of the present utility model is reasonable in design, without the Zigzag type gas circuit, greatly improves pneumatic efficiency, reduces atmospheric pressure lost.

5, this impactor has reasonably been adjusted quality and the impulse stroke of piston, frequency of impact and the single-impact energy of impactor have been improved, thereby can realize in various rock stratum the work of " high frequency, high energy ", compare existing impactor operating efficiency and improved 20% ~ 30%, and the working pressure range of this impactor is wide, can be in 5-30 kilograms per centimeter ²Work in scope.

The accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is described in further detail.

Fig. 1 is the structural representation of impactor described in background technology.

Fig. 2 is structural representation of the present utility model.

Fig. 3 is A place enlarged drawing in Fig. 2.

The specific embodiment

As Figure 2-3, the component names of the numbering correspondence in figure is:

Joint after 1-, 2-non retern valve, 3-O type circle, 4-plastic plug, the compound dish spring of 5-, 6-base, 7-spring, 8-O type circle, 9-distribution bar, 10-inner casing, 11-piston, 12-outer tube, 13-O type circle, the 14-fairlead, 15-maintainance set, 16/17-O type circle, 18-snap ring, 19-front connector, 20-drill bit.

Joint hollow duct after 21-, 22-distribution bar side passage, 23-annular chamber, 24-piston body surface air supply chamber, 25-circular passage, air chamber before 26-, 27-rear gas chamber, 28-piston centre porosity, 29-bit central pore, 30-air supply channel.

The utility model is comprised of 19 parts, wherein comprises five O shape circles, simultaneously, for convenience of understanding, has also provided the installation site of drill bit in figure.Structure of the present utility model is, comprise outside rear joint 1, outer tube 12, the front connector 19 connected successively, described front connector 19 connects drill bit 20, be provided with non retern valve 2 and distribution bar 9 near rear joint in outer tube, non retern valve 2 parts are positioned at distribution bar major part, are provided with compound dish spring 5 and base 6 between distribution bar and rear joint, also be provided with inner casing 10 and piston 11 in outer tube, can form air supply channel 30 between the interior inside wall of cylinder and piston outer wall, piston 11 is provided with the large end of piston and piston small end, distribution bar microcephaly is positioned at the rear gas chamber 27 of the large end of piston, distribution bar microcephaly can coordinate with piston centre porosity 28 the formation shutoff, outer tube is inboard forms annular chamber 23 with the inner casing outside, form piston body surface air supply chamber 24 and circular passage 25 between piston and outer tube 12, the piston small end can contact with drill bit 20, also be provided with fairlead 14 between piston small end and outer tube 12, air chamber 26 before forming between fairlead 14 and outer tube 12 and piston 11, drill bit 20 is provided with bit central pore 29.

For starting impactor, must first transfer impactor.Contact also jack-up piston 11, starts preparation and comes to an end when drill bit 20 with rock when position shown in Fig. 2.

The gases at high pressure P0 introduced by rear joint hollow duct 21, back down non retern valve 2, and through distribution bar side passage 22, outer tube is inboard with the inner casing outside, forms annular chamber 23, gases at high pressure enter front air chamber 26 and rear gas chamber 27 by what replace here.

When return starts, piston 11 is in position shown in Fig. 2, and the gases at high pressure in annular chamber 23 enter front air chamber 26 through piston body surface air supply chamber 24, process piston body surface and promote piston movements.In the motion of piston return, when circular passage 25 is closed, front air chamber 26 air inlets stop, and the gases at high pressure in the forward air chamber of piston expand and continue to move upward, after piston small end and fairlead 14 disengagements, the gas of front air chamber 26 is at the bottom of bit central pore 29 drains into hole.When piston starts the return motion, the gas of rear gas chamber 27, escape at the bottom of hole through piston centre porosity 28, bit central pore 29, and back pressure resistance suffered while making piston movement is very little; When distribution bar microcephaly starts to enter the cooperation of the large end centre bore formation of piston, the return motion of piston is compressed the gas of rear gas chamber 27; When the large end motion of piston, to the interior inside wall of cylinder, forming opening, gases at high pressure enter rear gas chamber 27 through annular chamber 23, air supply channel 30.Due to piston movement inertia, piston slides a segment distance, until enter the gases at high pressure generation pressure of rear gas chamber 27, makes piston stop the return motion.

During the piston stroke motion, piston 11 moves to the opening turn-off transient of the large end of piston and inner casing 10 inwalls formation under the promotion of gases at high pressure, the passage that gases at high pressure enter rear gas chamber 27 is blocked, piston moves downward by gas expansion and Action of Gravity Field, after piston centre porosity 28 and distribution bar small end break away from, rear gas chamber's gas is at the bottom of piston centre porosity 28, bit central pore 29 drain into hole.Now piston 11 shock drill bit 20 afterbodys complete stroke movement.When piston starts stroke movement, the gas of front air chamber 26 continues at the bottom of fairlead 14 and bit central pore 29 are discharged to hole; When the piston small end enters fairlead, the gas of front air chamber starts compression, and piston moves to always connects circular passage 25, and gases at high pressure enter into front air chamber 26, complete the distribution process.

Claims

1. a down-the-hole air hammer, comprise rear joint (1), outer tube (12), front connector (19) that its outside connects successively, described front connector connects drill bit (20), it is characterized in that: in outer tube, near rear joint, be provided with non retern valve (2) and distribution bar (9), distribution bar (9) is provided with distribution bar major part and distribution bar microcephaly, non retern valve (2) part is positioned at distribution bar major part, is provided with compound dish spring (5) and base (6) between distribution bar and rear joint, also be provided with inner casing (10) and piston (11) in outer tube, can form air supply channel (30) between the interior inside wall of cylinder and piston outer wall, piston (11) is provided with the large end of piston and piston small end, distribution bar microcephaly is positioned at the rear gas chamber (27) of the large end of piston, distribution bar microcephaly can coordinate with piston centre porosity (28) the formation shutoff, outer tube is inboard forms annular chamber (23) with the inner casing outside, form piston body surface air supply chamber (24) and circular passage (25) between piston and outer tube (12), the piston small end can contact with drill bit (20), also be provided with fairlead (14) between piston small end and outer tube (12), air chamber (26) before forming between fairlead (14) and outer tube (12) and piston (11), drill bit (20) is provided with bit central pore (29).