CN103573182A - Piston guide sleeve type valveless double-cylinder down-hole hammer - Google Patents
Piston guide sleeve type valveless double-cylinder down-hole hammer Download PDFInfo
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- CN103573182A CN103573182A CN201210255717.1A CN201210255717A CN103573182A CN 103573182 A CN103573182 A CN 103573182A CN 201210255717 A CN201210255717 A CN 201210255717A CN 103573182 A CN103573182 A CN 103573182A
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Abstract
A piston guide sleeve type valveless double-cylinder down-hole hammer comprises a rear connector, a check valve, an air distributing rod, a piston, a cylinder body, a guide sleeve, a clamping ring, a drill body and a front connector. The check valve is a one-way valve and is provided with a valve seat and a spring. The piston is a long and thin piston with a duct, the air distributing rod and an air inlet base at the rear end of the check valve are of an integrated structure, an inner cylinder is arranged in the cylinder body and on the outer sides of the air distributing rod and the piston, and in a piston moving process, the matching end of the piston and the air distributing rod is arranged in the inner cylinder all the time. The air distributing rod and the check valve seat are integrated, the structure is simple, functions of location, damping and air suction can be achieved, and the hammer is stable and reliable during working. The piston is free of a radial hole structure, compressed air can reach a front air cavity and a rear air cavity through the shortest paths, and hammer efficiency is improved.
Description
Technical field
The present invention relates to a kind of pneumatic impact equipment, relate in particular to a kind of piston guide shell type valveless twin-tub type down-the-hole air hammer.
Background technology
Valveless 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 using 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: Mission series valve free impacter is comprised of 16 parts, the rear joint 1 with API screw thread is the parts that impactor is connected with drilling rod.Non retern valve 2 is to prevent that magmatic water from flowing into the one way valve of impactor and drilling rod.Lateral pin 5 is connectors of distribution bar 8 and check valve seat 3, rear joint 1.Check valve seat can also be introduced compressed air in distribution bar 8, realizes the distribution action of piston movement together with cylinder body 7, distribution bar 8, piston 9.The elongated shape piston that has central duct and other hole is by compressed-air actuated power conversion, to be directly a part of mechanical movement kinetic energy, and by it, this kinetic energy is passed to drill bit 16 by the mode of colliding, so piston is a very crucial part.Cylinder body 7 is the be integrated cylinder body of structure of inside and outside cylinder.Collar 10 can prevent that piston from skidding off cylinder body when bit change 16 more.13 of snap rings for prevent that drill bit 16 from coming off to open form snap ring.Fairlead 11 has been fairleads of distribution effect.Front connector 15 is to drive drill bit to rotate and in the front connector of upper slip.Bit body 16 is columnar drills, is the instrument of rock that directly contacts brokenly with rock mass.On the fitting face of rear joint and cylinder body, be provided with the 4th O RunddichtringO 6; Fairlead and cylinder body fitting face are provided with the 2nd O RunddichtringO 12; On the fitting face of snap ring and cylinder body, be provided with the 3rd O RunddichtringO 14.
Above-mentioned single-cylinder down-hole impactor without valve has following disadvantages: 1, distribution bar, valve seat and rear joint are rigidly connected by lateral pin mode, even fracture of the early stage easily distortion of lateral pin; Hole requirement on machining accuracy high being difficult for of 2, joining with lateral pin guarantees, handling are inconvenient; 3, distribution bar is longer, and has the injection well that area is larger, adopts ralocatable mode work, easily occurs early fracture phenomenon, reliability while reducing impactor work; 4, there is more intake and exhaust road, thereby cause larger atmospheric pressure lost; 5, on piston, have more distribution duct, air flue turnover and distance are long, and pressure loss is large, make it responsive to heat treatment reaction, and stress is concentrated, and work is often because of technique and structural reason early damage.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of piston guide shell type valveless twin-tub type down-the-hole air hammer, and distribution bar and check valve seat are integrated, and function simple in structure, can to realize location, vibration damping, air inlet is reliable and stable during work; Piston, without cellular type structure radially, can be realized Compressed Gas and arrive respectively forward and backward air cavity by short line, has improved the efficiency of impactor.
The object of the present invention is achieved like this:
A kind of piston guide shell type valveless twin-tub type down-the-hole air hammer, it comprises rear joint, non retern valve, distribution bar, piston, cylinder body, fairlead, snap ring, bit body and front connector, described non retern valve is one way valve, it has valve seat and spring, described piston is the elongated shape piston that has duct, described distribution bar and the air inlet seat of non retern valve rear end are structure as a whole, the outside that is positioned at distribution bar, piston in cylinder interior is provided with inner casing, in piston movement process, piston and distribution bar abutting end are all the time in interior cylinder interior.
The air inlet seat outside of the above is provided with cooperation supporting disk, coordinates supporting disk to match with inner casing, coordinates supporting disk and inner casing fitting face to be provided with an O RunddichtringO.
Upper the 2nd O RunddichtringO that is provided with on fairlead and cylinder body fitting face; Between snap ring and cylinder body, be provided with the 3rd O RunddichtringO; On rear joint and cylinder body fitting face, be provided with the 4th O RunddichtringO.
The present invention has obtained following technique effect:
1, distribution bar, inner casing trim designs are reasonable.The large end of distribution bar is contained in the stepped hole of inner casing one end, and rear joint is directly 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, however the high-precision cooperation of maintenance that can be permanent has guaranteed operating efficiency.
2, distribution bar is rational in infrastructure.Distribution bar and valve seat are integral type structure, and distribution bar dwindled diameter of axle ratio, are easy to processing, are difficult for deformation and fracture when work; Gas distribution channels is succinctly unobstructed, thereby has reduced the loss of energy.
3, piston structure is reasonable.First, the number of holing on piston is few, diameter of axle variation is less, the stress in the time of transmitting more stably impactor work, and working life has improved; The second, on piston duct few, without turn back duct, without elongated hole, easy to process, working (machining) efficiency is high, without deep Hole.
4, system gas circuit is reasonable in design.System gas circuit is unobstructed, without Zigzag type gas circuit, greatly improve pneumatic efficiency, reduce atmospheric pressure lost.
5, impactor operating efficiency is high.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 in various rock stratum, realize the work of " high frequency, high energy ", improve operating efficiency (efficiency has improved 20% ~ 30% by contrast).
6, impactor working pressure range is wide.Can be in 5-25 kilograms per centimeter
2work in scope.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the structural representation of prior art;
Fig. 2 is schematic diagram of the present invention.
The specific embodiment
As shown in Figure 2, a kind of piston guide shell type valveless twin-tub type down-the-hole air hammer, it comprises rear joint 1, non retern valve 2, distribution bar 8, piston 9, cylinder body 7, fairlead 11, snap ring 13, bit body 16 and front connector 15, described non retern valve is one way valve, it has valve seat 3 and spring 4, described piston is the elongated shape piston that has duct, described distribution bar and the air inlet seat 28 of non retern valve rear end are structure as a whole, in cylinder interior, be positioned at distribution bar, the outside of piston is provided with inner casing 29, in piston movement process, piston and distribution bar abutting end are all the time in interior cylinder interior.
Preferably, described air inlet seat outside is provided with and coordinates supporting disk 26, coordinates supporting disk to match with inner casing, coordinates supporting disk and inner casing fitting face to be provided with an O RunddichtringO 27.On fairlead and cylinder body fitting face, be provided with the 2nd O RunddichtringO 12; Between snap ring and cylinder body, be provided with the 3rd O RunddichtringO 14; On rear joint and cylinder body fitting face, be provided with the 4th O RunddichtringO 6.
The present invention is the parts that connect impactor and drilling rod with the rear joint 1 of API screw thread.Non retern valve 2 is to prevent that magmatic water from flowing into the one way valve of impactor and drilling rod, and distribution bar 8 and air inlet seat 28 are integrated, and except compressed air is introduced cylinder body, also same cylinder body, piston are realized the distribution action of piston movement together.Distribution bar 9 is for having the elongated shape piston in duct, it is by the power conversion of Compressed Gas, to be directly a part of mechanical movement kinetic energy, and by it, this kinetic energy being passed to bit body 16 by the mode of colliding, piston 9 is all the time in inner casing 29 and 7 li of motions of cylinder body.Fairlead 11 is to play the fairlead of distribution effect with piston, snap ring 13 for prevent that bit body 16 from coming off to open form snap ring.Front connector 15 is for driving bit body 16 rotate and slide.
Operating principle of the present invention is as follows:
For starting impactor, must first transfer impactor.When drill bit contacts with rock and jack-up piston during in position shown in Fig. 2, start preparation and come to an end.
The gases at high pressure P being introduced by rear joint hollow duct 17, backs down non retern valve 2, through distribution bar side passage 18, outer tube inner side, forms annular chamber 19 to piston body surface air supply chamber 20 with inner casing outside.Gases at high pressure are by the air chamber 21He rear gas chamber 22 before cylinder that enters replacing here.
When return starts, piston is in position shown in Fig. 2, and the gases at high pressure in annular chamber 19 enter front air chamber 21 through piston body surface air drain 20, process piston body surface and promote piston movements.In the motion of piston return, when circular passage 25 is closed, front air chamber 21 air inlets stop, and the gases at high pressure in the forward air chamber of piston expand and continue to move upward, and after the front end and fairlead disengagement of piston, front air chamber 21 gases are at the bottom of bit central hole 24 drains into hole.When piston starts return motion, the gas P of rear chamber 22, escapes at the bottom of hole through piston centre porosity 23, bit central pore 24, and back pressure resistance suffered while making piston movement is very little; When distribution bar microcephaly starts to enter the cooperation of piston formation, the return motion of piston is compressed the gas of rear gas chamber 22; When the large end motion of piston is to forming opening with the interior inside wall of cylinder, gases at high pressure enter rear gas chamber 22 through annular chamber 19, piston air supply chamber 20.Due to piston movement inertia, piston slides a segment distance, until enter the gases at high pressure generation pressure of rear chamber 22, makes piston stop return motion.
During piston stroke motion, piston moves to the opening turn-off transient of the large end of piston and the formation of the interior inside wall of cylinder under the promotion of gases at high pressure, the passage that gases at high pressure enter rear gas chamber is blocked, piston travels forward by gas expansion, when piston center hole and distribution bar lower end depart from Hou， rear gas chamber gas through 23,24 drain into hole at the bottom of.Now Piston knocking bit afterbody completes stroke movement.When piston starts stroke movement, the gas of front air chamber 21 continues at the bottom of fairlead and bit central hole 24 are discharged to hole; When piston nose enters fairlead, the gas of front air chamber starts compression, and piston moves to always connects arc groove 25, and gases at high pressure enter into front air cavity 21, have completed distribution process.
Claims (3)
1. a piston guide shell type valveless twin-tub type down-the-hole air hammer, it comprises rear joint (1), non retern valve (2), distribution bar (8), piston (9), cylinder body (7), fairlead (11), snap ring (13), bit body (16) and front connector (15), described non retern valve is one way valve, it has valve seat (3) and spring (4), described piston is the elongated shape piston that has duct, it is characterized in that: the air inlet seat (28) of described distribution bar and non retern valve rear end is structure as a whole, in cylinder interior, be positioned at distribution bar, the outside of piston is provided with inner casing (29), in piston movement process, piston and distribution bar abutting end are all the time in interior cylinder interior.
2. piston guide shell type valveless down-the-hole air hammer according to claim 1, it is characterized in that: described air inlet seat outside is provided with and coordinates supporting disk (26), coordinate supporting disk to match with inner casing, coordinate supporting disk and inner casing fitting face to be provided with an O RunddichtringO (27).
3. piston guide shell type valveless down-the-hole air hammer according to claim 2, is characterized in that: on fairlead and cylinder body fitting face, be provided with the 2nd O RunddichtringO (12); Between snap ring and cylinder body, be provided with the 3rd O RunddichtringO (14); On rear joint and cylinder body fitting face, be provided with the 4th O RunddichtringO (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210255717.1A CN103573182A (en) | 2012-07-23 | 2012-07-23 | Piston guide sleeve type valveless double-cylinder down-hole hammer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210255717.1A CN103573182A (en) | 2012-07-23 | 2012-07-23 | Piston guide sleeve type valveless double-cylinder down-hole hammer |
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| CN103573182A true CN103573182A (en) | 2014-02-12 |
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| CN201210255717.1A Pending CN103573182A (en) | 2012-07-23 | 2012-07-23 | Piston guide sleeve type valveless double-cylinder down-hole hammer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967995A (en) * | 2014-05-20 | 2014-08-06 | 湖南汉寿煤矿机械有限公司 | Shock absorption rod for mine liquid carbon oxide phase changing and cracking device and mine liquid carbon oxide phase changing and cracking device |
| CN107386957A (en) * | 2017-08-29 | 2017-11-24 | 吉林大学 | A kind of valve type living is without air cushion high-performance air hammer |
| CN114622824A (en) * | 2022-02-17 | 2022-06-14 | 西南石油大学 | Air drilling bit with impact function |
-
2012
- 2012-07-23 CN CN201210255717.1A patent/CN103573182A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967995A (en) * | 2014-05-20 | 2014-08-06 | 湖南汉寿煤矿机械有限公司 | Shock absorption rod for mine liquid carbon oxide phase changing and cracking device and mine liquid carbon oxide phase changing and cracking device |
| CN103967995B (en) * | 2014-05-20 | 2015-11-25 | 湖南汉寿煤矿机械有限公司 | Mining liquid CO 2phase transformation fracturing equipment decoupling rod and equipment |
| CN107386957A (en) * | 2017-08-29 | 2017-11-24 | 吉林大学 | A kind of valve type living is without air cushion high-performance air hammer |
| CN107386957B (en) * | 2017-08-29 | 2023-05-05 | 吉林大学 | Valve type air cushion-free high-performance pneumatic impactor |
| CN114622824A (en) * | 2022-02-17 | 2022-06-14 | 西南石油大学 | Air drilling bit with impact function |
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Application publication date: 20140212 |