CN204476255U - One is spun compacted two-way pneumatic impact pike - Google Patents
One is spun compacted two-way pneumatic impact pike Download PDFInfo
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- CN204476255U CN204476255U CN201520122735.1U CN201520122735U CN204476255U CN 204476255 U CN204476255 U CN 204476255U CN 201520122735 U CN201520122735 U CN 201520122735U CN 204476255 U CN204476255 U CN 204476255U
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Abstract
The utility model discloses one to spin compacted two-way pneumatic impact pike, comprise the tool joint connected successively, two-way valve actuating mechanism, upper torque transmission mechanism, impact main body, lower torque transmission mechanism and spearhead, two-way valve actuating mechanism comprises air distribution shaft and distribution shell, impact main body and comprise outer shell, inner cylinder liner, distribution seat, core pipe, piston, Inner spacer ring and distribution lining, upper torque transmission mechanism comprises Upper shaft sleeve, and lower torque transmission mechanism comprises torsion pass joint; Air distribution shaft is provided with and is positioned at the first axial center hole, the second axial center hole, axial exhaust groove, " L " shape deep gouge, radial air inlet hole, rod radial air vent, axial admission hole and axial vent holes; Cotter pilotage radial direction is installed in " L " shape deep gouge that on Upper shaft sleeve and the inner is placed in air distribution shaft; In the first axial center hole that the lower end of tool joint is placed in air distribution shaft and with the upper-end contact of non retern valve, the lower end of non retern valve is provided with spring.Impact pike described in the utility model can easily realize at earth-borings such as frozen soil, sandy soil, sand pebble layers.
Description
Technical field
The Pneumatic percussion pike that the utility model relates in a kind of use, low blast air compressor machine drives, particularly relates to one and to spin compacted two-way pneumatic impact pike.
Background technology
Anchoring at reinforcing underground structure, pattern foundation pit supporting structure, stablize in the engineerings such as excavation slope and be widely used.But loose soil bed, layer of sand and sand-pebble layer are loose, broken, in anchor hole drilling process, the problems such as bit freezing, bury drills, hole wall collapse easily occur, constructional difficulties, is difficult to form effective anchor hole.The drilling construction method that sand-pebble layer is conventional is mainly followed the rotary drilling of sleeve pipe long spire and follows pipe rotary-percussive drilling, but this type of drilling method drilling cost is high, restricted with the pipe degree of depth.
Spin in compacted drilling and forming hole process, spearhead impact force, feed power and rotary torque synergy under, the rock slag of spearhead fragmentation bits are clamp-oned stratum, integrate the advantage of percussion drilling, rotary drilling, vibro-drilling and air drilling method, impact energy is large, and drilling process is deslagging not, and drilling efficiency is high, drilling quality is good, environmentally safe.But compacted creeping into of spinning limits by formation condition, be used for the ground bolting hole constructions such as loose soil layer, layer of sand, meet sand-pebble layer, cobble stratum, boulder and erratic boulder stratum and pass through difficulty.In addition, loose soil bed, layer of sand and sand-pebble layer, self-stable ability is poor, and block of holing after pore-forming, undergauge, underground drilling accident happen occasionally.
Authorization Notice No. is the utility model patent of " CN2017231446U ", discloses a kind of Bidirectional DTH hammer, and be one and spin compacted Pneumatic percussion pike, its forward impact rotary drilling of can pressurizeing, can realize again carrying reverse impact in process.But there are the following problems for above-mentioned Bidirectional DTH hammer: (1) gas distribution structure is complicated, intake and exhaust all need into multiple tracks passage and ring cavity, and when the one way valve being in open mode during exhaust effectively can not prevent connecting and disconnecting drill rod, foreign material pour in down a chimney; (2) reciprocating motion of the pistons lubrication needs, by realizing to charging-up lubricant oil in compressed air, need be equipped with independent oiling equipment; (3) outer tube and drill bit are fixed by threaded connection, and under impact loading, thread connection is easily damaged; (4) monolithic subland drill is poor to rotary drilling adaptability for working condition; (5) former floating valve actuating mechanism can not just impact or keep station well under anti-impact conditions, and when causing work, forehand is counter beats ballistic work deficiency.Above-mentioned defect causes this Bidirectional DTH hammer larger in the difficulty of the earth-borings such as frozen soil, sandy soil, sand pebble layer.
Utility model content
The purpose of this utility model is just to provide a kind of compacted two-way pneumatic impact pike that spins being applicable to the earth-borings such as frozen soil, sandy soil, sand pebble layer to solve the problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
One is spun compacted two-way pneumatic impact pike, comprise the tool joint connected successively, two-way valve actuating mechanism, upper torque transmission mechanism, impact main body, lower torque transmission mechanism and spearhead, wherein, described two-way valve actuating mechanism comprises air distribution shaft and distribution shell, described impact main body comprises outer shell, inner cylinder liner, distribution seat, core pipe, piston, Inner spacer ring and distribution lining, described upper torque transmission mechanism comprises Upper shaft sleeve, and described lower torque transmission mechanism comprises torsion pass joint, the upper end of described tool joint is used for being connected with drilling rod, the lower end of described tool joint is connected with the upper end of described air distribution shaft, the lower end of described air distribution shaft is connected with the upper end of described core pipe, described Upper shaft sleeve is connected with the upper end of described distribution shell, the bottom of described distribution shell is connected with the upper end of described outer shell, and described torsion pass jiont treatment is between the lower end of described outer shell and the upper end of described spearhead, described air distribution shaft is provided with and is positioned at epimere and the first axial center hole of upper end open and be positioned at hypomere and the second axial center hole of lower ending opening, not connected between described first axial center hole and described second axial center hole, the epimere circumferential surface of described air distribution shaft is evenly provided with multiple axial exhaust groove, " L " shape deep gouge is provided with between adjacent described axial exhaust groove, the long limit of described " L " shape deep gouge be axial direction and its minor face near the upper end of described air distribution shaft, the hypomere circumferential surface of described air distribution shaft is evenly provided with multiple radial air inlet hole and multiple rod radial air vent, multiple axial admission hole and multiple axial vent holes is provided with in the hypomere wall of described air distribution shaft, described axial admission hole and described radial air inlet hole one_to_one corresponding and be interconnected, described radial air inlet hole and described first axial center hole are interconnected, described axial vent holes and described axial exhaust groove one_to_one corresponding and be interconnected, described rod radial air vent is communicated with described second axial center hole mutually with described axial vent holes, the hypomere inwall of the described axial vent holes of part arranges screw thread for being connected with the upper end of described core pipe, described upper torque transmission mechanism also comprises cotter pilotage, and described cotter pilotage radial direction is installed on described Upper shaft sleeve, and the inner of described cotter pilotage is placed in " L " shape deep gouge in described air distribution shaft, the lower end of described tool joint is placed in described first axial center hole of described air distribution shaft, non retern valve is provided with in described first axial center hole, the upper end of described non retern valve is connected with the lower end in contact of described tool joint, be provided with the spring for withstanding described non retern valve between step on the lower end of described non retern valve and the hole wall of described first axial center hole, described non retern valve is provided with the valve opening communicated with described first axial center hole.
In said structure, the structure of air distribution shaft, cotter pilotage and non retern valve is the emphasis of the utility model innovation, wherein, air distribution shaft is for realizing the cross flow one of air inlet in the impact pike course of work, exhaust, the air inlet of air distribution shaft and steam vent be circumferential to intersect, be evenly arranged, its distribution process is as follows: compressed air enters the first axial center hole of air distribution shaft through tool joint, non retern valve, and enter the ring cavity between distribution shell and core pipe by radial air inlet hole, axial admission hole, arrive the working chamber of impact pike, realize air inlet flow; The gas of discharging from the core pipe inside impacting main body discharges impact pike by rod radial air vent, axial vent holes, realizes exhaust flow; Cotter pilotage coordinates can realize double direction impulse with " L " shape deep gouge, and its principle is: air distribution shaft circumferential uniform several " L " shape deep gouge, and the cotter pilotage arranged with Upper shaft sleeve inner annular coordinates, and impact pike cotter pilotage in compacted drilling process is locked in positive impact conditions; To concentrate on one thing only low-angle reversion proposing letter in drill-through journey, cotter pilotage slides along " L " shape deep gouge, and core pipe upwards floats, reciprocating motion of the pistons stroke alteration, switches to reverse impact state; The effect of non retern valve is: during work, and compressed air pushes the working chamber that non retern valve enters impact pike open; During connecting and disconnecting drill rod, non retern valve closes inlet channel under spring force effect, stops impurity in hole to pour in down a chimney and enters impact pike inside.
Further, described inner cylinder liner and described distribution lining are replaceable structure, the epimere outer circumferential walls of described distribution lining is evenly provided with the multiple axial gas passages be interconnected and multiple radial gas passages, the hypomere outer circumferential walls of described distribution lining is evenly provided with the axial accumulator tank of multiple lubricant grease, stores lubrication oil in the axial accumulator tank of described lubricant grease and its bottom land is provided with the oilhole communicated with the central through hole of described distribution lining.By the circumferential uniform axial gas passages of distribution lining and radial gas passages, entering or discharging of front air chamber gas can be realized.Lubricant grease in the axial accumulator tank of the circumferential uniform lubricant grease of distribution lining enters in distribution lining by oilhole, can realize the self-lubricating in reciprocating motion of the pistons process.
Particularly, described oilhole is two and lays respectively at the two ends of the axial accumulator tank of described lubricant grease.
As preferably, the outline of described spearhead is conch biomimetic features, and the upper end of described spearhead is connected with anvil block and seal closure composition, and adopt interference fit to connect between described spearhead with described seal closure, the bottom of described anvil block is connected with described spearhead by screw thread; The top of described torsion pass joint is connected by the lower end of screw thread with described outer shell, bottom and the seal closure of described torsion pass joint are slidably connected, between the bottom of described torsion pass joint and described seal closure, sliding ring is set, described lower torque transmission mechanism also comprises buffering back-moving spring, and described buffering back-moving spring is arranged between described anvil block and described torsion pass joint.In said structure, the outline of spearhead is conch biomimetic features, is different helicoids, can adapt to different stratum; The slipper seal syndeton that torsion pass joint and seal closure are realized by sliding ring, makes can to produce between spearhead and torsion pass joint floating, avoids the problem easily producing and destroy that is fixedly connected; Meanwhile, slipper seal structure can prevent gas in impact pike internal gutter from escaping on the one hand, effectively can prevent outside rock slag from considering to be worth doing on the other hand and enter impact pike inside.
As preferably, bottom and the surface of described spearhead are furnished with hard alloy spherical-teeth, and described spearhead inside is provided with exhaust passage.Hard alloy spherical-teeth is arranged on spearhead bottom and surface, for impact grinding or cutting stratum; Spearhead inside arranges exhaust passage, for cooling spearhead cutting teeth and surface.
As preferably, between described core pipe and described anvil block, be provided with retracting spring.Retracting spring ensures that anvil block realizes Rapid reset in the absence of external loads, guarantees that impact pike is carrying not empty in drill-through journey beating, and keeps continuous print counterattack operating mode.
The beneficial effects of the utility model are:
In sum, the compacted two-way pneumatic impact pike that spins described in the utility model can easily realize at earth-borings such as frozen soil, sandy soil, sand pebble layers, and concrete advantage is as follows:
(1) gas distribution structure is not very complicated and because be axis or radial hole, be easy to processing, intake and exhaust can be completed by axial hole and radial hole, and because foreign material when the effect of non retern valve effectively can prevent connecting and disconnecting drill rod pour in down a chimney during exhaust;
(2) owing to being provided with the axial accumulator tank of lubricant grease in the hypomere outer circumferential walls of distribution lining, lubricant grease in it can enter piston movement passage, lubrication needed for reciprocating motion of the pistons does not need to annotate from compressor, do not need to be equipped with independent oiling equipment, simplify compressor arrangement, easy to implement;
(3) impact between main body and spearhead and adopts slipper seal syndeton by torsion pass joint, make can to produce between spearhead and torsion pass joint floating, avoiding is fixedly connected easily produces the problem of destruction;
(4) spearhead and anvil block and seal closure are connected to form split-type structural, strong to rotary drilling adaptability for working condition;
(5) by arranging cotter pilotage and make cotter pilotage coordinate with " L " shape deep gouge between Upper shaft sleeve and air distribution shaft, can double direction impulse be realized, and easily can change between forward impact and reverse impact.
Accompanying drawing explanation
Fig. 1 is the stereogram of the compacted two-way pneumatic impact pike that spins described in the utility model;
Fig. 2 is the front view of the compacted two-way pneumatic impact pike that spins described in the utility model;
Fig. 3 is the A-A sectional view in Fig. 2, and the impact main body stage casing in figure is not analysed and observe;
Fig. 4 is the stereogram of air distribution shaft described in the utility model;
Fig. 5 is the front sectional view of air distribution shaft described in the utility model;
Fig. 6 is the stereogram of distribution lining described in the utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As Figure 1-Figure 5, illustrate: direction when following upper and lower orientation uses with impact pike is as the criterion, namely tool joint 1 up, and spearhead 6 is in below, one is spun compacted two-way pneumatic impact pike, comprise the tool joint 1 connected successively, two-way valve actuating mechanism, upper torque transmission mechanism, impact main body, lower torque transmission mechanism and spearhead 6, wherein, described two-way valve actuating mechanism comprises air distribution shaft 8 and distribution shell 3, be connected with upper sealing ring 17 by sealing screw 9 between air distribution shaft 8 and distribution shell 3, described impact main body comprises outer shell 4, inner cylinder liner 19, distribution seat 11, core pipe 14, piston 20, Inner spacer ring 12 and distribution lining 13, outer shell 4 upper, lower outer wall is provided with spiral boss 18, outer shell 4 and hole wall bump contact in pore forming process can be avoided, reduce the calorific value of impact pike, described upper torque transmission mechanism comprises Upper shaft sleeve 2 and cotter pilotage 15, described lower torque transmission mechanism comprises torsion pass joint 5 and buffering back-moving spring 22, the upper end of tool joint 1 is used for being connected with drilling rod (not shown), the lower end of tool joint 1 is connected with the upper end of air distribution shaft 8, the lower end of air distribution shaft 8 is connected with the upper end of core pipe 14, Upper shaft sleeve 2 is connected with the upper end of distribution shell 3, the bottom of distribution shell 3 is connected with the upper end of outer shell 4, and torsion pass joint 5 is installed between the lower end of outer shell 4 and the upper end of spearhead 6, air distribution shaft 8 is provided with and is positioned at epimere and the first axial center hole 88 of upper end open and be positioned at hypomere and the second axial center hole 89 of lower ending opening, not connected between first axial center hole 88 and the second axial center hole 89, the epimere circumferential surface of air distribution shaft 8 is evenly provided with multiple axial exhaust groove 82, " L " shape deep gouge 81 is provided with between adjacent axial exhaust groove 82, the long limit of " L " shape deep gouge 81 be axial direction and its minor face near the upper end of air distribution shaft 8, the hypomere circumferential surface of air distribution shaft 8 is evenly provided with multiple radial air inlet hole 83 and multiple rod radial air vent 84, multiple axial admission hole 86 and multiple axial vent holes 87 is provided with in the hypomere wall of air distribution shaft 8, axial admission hole 86 is with radial air inlet hole 83 one_to_one corresponding and be interconnected, radial air inlet hole 83 and the first axial center hole 88 are interconnected, axial vent holes 87 is with axial exhaust groove 82 one_to_one corresponding and be interconnected, rod radial air vent 84 is communicated with the second axial center hole 89 mutually with axial vent holes 87, the hypomere inwall of part axial vent holes 87 arranges screw thread and forms screw 85 for being connected with the upper end of core pipe 14, on Upper shaft sleeve 2, radial direction is provided with cotter pilotage 15, and the inner of cotter pilotage 15 is placed in " L " shape deep gouge 81 in air distribution shaft 8, the lower end of tool joint 1 is placed in the first axial center hole 88 of air distribution shaft 8, non retern valve 7 is provided with in first axial center hole 88, the upper end of non retern valve 7 is connected with the lower end in contact of tool joint 1, be provided with the spring 16 for withstanding non retern valve 7 between step on the lower end of non retern valve 7 and the hole wall of the first axial center hole 88, non retern valve 7 is provided with the valve opening 10 communicated with the first axial center hole 88.
As shown in Figure 3 and Figure 6, inner cylinder liner 19 and distribution lining 13 are replaceable structure, the epimere outer circumferential walls of distribution lining 13 is evenly provided with the multiple axial gas passages 26 be interconnected and multiple radial gas passages 27, the hypomere outer circumferential walls of distribution lining 13 is evenly provided with the axial accumulator tank 29 of multiple lubricant grease, lubrication oil (not shown) is stored and its bottom land is provided with the first oilhole 28 and the second oilhole 30 communicated with the central through hole of distribution lining 13 in the axial accumulator tank 29 of lubricant grease, first oilhole 28 and the second oilhole 30 lay respectively at the two ends of the axial accumulator tank 29 of lubricant grease.
As shown in Figure 1, Figure 2 and Figure 3, the outline of spearhead 6 is conch biomimetic features, bottom and the surface of spearhead 6 are furnished with hard alloy spherical-teeth, spearhead inside is provided with exhaust passage, the upper end of spearhead 6 is connected with anvil block 24 and seal closure 25 forms, adopt interference fit to connect between spearhead 6 with seal closure 25, the bottom of anvil block 24 is connected with spearhead 6 by screw thread; The top of torsion pass joint 5 is connected by the lower end of screw thread with outer shell 4, bottom and the seal closure 25 of torsion pass joint 5 are slidably connected, between the bottom of torsion pass joint 5 and seal closure 25, sliding ring 23 is set, is provided with between anvil block 24 and torsion pass joint 5 and cushions back-moving spring 22; Retracting spring 21 is provided with between core pipe 14 and anvil block 24.
As shown in figs 1 to 6, during use, the tool joint 1 of this impact pike upper end is connected with the drilling rod of rig, in downward percussion drilling process, compressed air enters in the centre bore of tool joint 1 through drilling rod, pushing non retern valve 7 open enters in the first axial center hole 88 of air distribution shaft 8, through the radial air inlet hole 83 of air distribution shaft 8, axial admission hole 86, and the annular gap between outer shell 4 and inner cylinder liner 19 impacting main body is entered by distribution seat 11, enter the rear gas chamber of impact pike, promoting piston 20 accelerates descending, with higher last impacting velocity impact anvil block 24, stroke terminates, ballistic work is passed to spearhead 6 by piston 20, realization is spun compacted creeping into, meanwhile, the air of the front air chamber of the impact pike steam vent through the axial gas passages 26 of distribution lining 13, radial gas passages 27 and core pipe 14 lower end enters the inside of core pipe 14, major part gas is discharged via the rod radial air vent 84 of air distribution shaft 8, axial vent holes 87, the passage that small portion of gas is opened on spearhead 6 is discharged, for cooling spearhead 6 and hard alloy spherical-teeth, ensure that the temperature of spearhead 6 in drilling process is unlikely too high, in the up process of piston 20, compressed air enters the annular gap between outer shell 4 and inner cylinder liner 19 impacting main body through the radial air inlet hole 83 of air distribution shaft 8, axial admission hole 86, via air inlet port of opening on inner cylinder liner 19, enter the rear gas chamber of impact pike, promote piston 20 and go upward to initial position, and so forth, coordinate drilling rod to rotate, compacted creeping into of spinning can be realized, the steam vent of compressed air through core pipe 14 upper end of the front air chamber of impact pike enters the inside of core pipe 14, so via air distribution shaft 8 radially steam vent 84 discharge, enter boring annular space return to earth's surface.
The positive and negative impact function of impact pike be by press down or on carry core pipe 14, the distribution stroke changing piston 20 realizes.Utilize cotter pilotage 15 and the air distribution shaft 8 with locking slot, piston 20 high speed impact downwards can be realized by reasonable distribution, and upwards the speed of backhaul end of a period impact anvil block 24 is extremely low.When on carry core pipe 14 switch to anti-impact conditions time, piston 20 downwards acceleration stroke reduces, backhaul accelerating sections increases and cushioning effect weakens, make piston 20 obtain higher return and impact end speed impact anvil block 24, anvil block 24 and outer shell 4 are rigidly connected, thus realize the backhaul momentum-exchange of piston 20 to the anti-percussion of impact pike.
Above-described embodiment is preferred embodiment of the present utility model; it is not the restriction to technical solutions of the utility model; as long as without the technical scheme that creative work can realize on the basis of above-described embodiment, all should be considered as falling within the scope of the rights protection of the utility model patent.
Claims (6)
1. the compacted two-way pneumatic impact pike that spins, comprise the tool joint connected successively, two-way valve actuating mechanism, upper torque transmission mechanism, impact main body, lower torque transmission mechanism and spearhead, wherein, described two-way valve actuating mechanism comprises air distribution shaft and distribution shell, described impact main body comprises outer shell, inner cylinder liner, distribution seat, core pipe, piston, Inner spacer ring and distribution lining, described upper torque transmission mechanism comprises Upper shaft sleeve, and described lower torque transmission mechanism comprises torsion pass joint, the upper end of described tool joint is used for being connected with drilling rod, the lower end of described tool joint is connected with the upper end of described air distribution shaft, the lower end of described air distribution shaft is connected with the upper end of described core pipe, described Upper shaft sleeve is connected with the upper end of described distribution shell, the bottom of described distribution shell is connected with the upper end of described outer shell, and described torsion pass jiont treatment is between the lower end of described outer shell and the upper end of described spearhead, it is characterized in that: described air distribution shaft is provided with and is positioned at epimere and the first axial center hole of upper end open and be positioned at hypomere and the second axial center hole of lower ending opening, not connected between described first axial center hole and described second axial center hole, the epimere circumferential surface of described air distribution shaft is evenly provided with multiple axial exhaust groove, " L " shape deep gouge is provided with between adjacent described axial exhaust groove, the long limit of described " L " shape deep gouge be axial direction and its minor face near the upper end of described air distribution shaft, the hypomere circumferential surface of described air distribution shaft is evenly provided with multiple radial air inlet hole and multiple rod radial air vent, multiple axial admission hole and multiple axial vent holes is provided with in the hypomere wall of described air distribution shaft, described axial admission hole and described radial air inlet hole one_to_one corresponding and be interconnected, described radial air inlet hole and described first axial center hole are interconnected, described axial vent holes and described axial exhaust groove one_to_one corresponding and be interconnected, described rod radial air vent is communicated with described second axial center hole mutually with described axial vent holes, the hypomere inwall of the described axial vent holes of part arranges screw thread for being connected with the upper end of described core pipe, described upper torque transmission mechanism also comprises cotter pilotage, and described cotter pilotage radial direction is installed on described Upper shaft sleeve, and the inner of described cotter pilotage is placed in " L " shape deep gouge in described air distribution shaft, the lower end of described tool joint is placed in described first axial center hole of described air distribution shaft, non retern valve is provided with in described first axial center hole, the upper end of described non retern valve is connected with the lower end in contact of described tool joint, be provided with the spring for withstanding described non retern valve between step on the lower end of described non retern valve and the hole wall of described first axial center hole, described non retern valve is provided with the valve opening communicated with described first axial center hole.
2. the compacted two-way pneumatic impact pike that spins according to claim 1, it is characterized in that: described inner cylinder liner and described distribution lining are replaceable structure, the epimere outer circumferential walls of described distribution lining is evenly provided with the multiple axial gas passages be interconnected and multiple radial gas passages, the hypomere outer circumferential walls of described distribution lining is evenly provided with the axial accumulator tank of multiple lubricant grease, stores lubrication oil in the axial accumulator tank of described lubricant grease and its bottom land is provided with the oilhole communicated with the central through hole of described distribution lining.
3. the compacted two-way pneumatic impact pike that spins according to claim 2, is characterized in that: described oilhole is two and lays respectively at the two ends of the axial accumulator tank of described lubricant grease.
4. the compacted two-way pneumatic impact pike that spins according to claim 1, it is characterized in that: the outline of described spearhead is conch biomimetic features, the upper end of described spearhead is connected with anvil block and seal closure composition, adopt interference fit to connect between described spearhead with described seal closure, the bottom of described anvil block is connected with described spearhead by screw thread; The top of described torsion pass joint is connected by the lower end of screw thread with described outer shell, bottom and the seal closure of described torsion pass joint are slidably connected, between the bottom of described torsion pass joint and described seal closure, sliding ring is set, described lower torque transmission mechanism also comprises buffering back-moving spring, and described buffering back-moving spring is arranged between described anvil block and described torsion pass joint.
5. the compacted two-way pneumatic impact pike that spins according to claim 4, it is characterized in that: bottom and the surface of described spearhead are furnished with hard alloy spherical-teeth, described spearhead inside is provided with exhaust passage.
6. the compacted two-way pneumatic impact pike that spins according to claim 4 or 5, is characterized in that: be provided with retracting spring between described core pipe and described anvil block.
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| CN201520122735.1U CN204476255U (en) | 2015-03-03 | 2015-03-03 | One is spun compacted two-way pneumatic impact pike |
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| CN201520122735.1U CN204476255U (en) | 2015-03-03 | 2015-03-03 | One is spun compacted two-way pneumatic impact pike |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763323A (en) * | 2015-03-03 | 2015-07-08 | 中国水利水电第十工程局有限公司 | Rotating percussion-compact two-way pneumatic impact mole |
| CN115976456A (en) * | 2022-12-07 | 2023-04-18 | 镇江市博驰汽车配件有限公司 | Atmosphere circulating well type nitriding furnace and nitriding process for output shaft of hydraulic motor |
-
2015
- 2015-03-03 CN CN201520122735.1U patent/CN204476255U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763323A (en) * | 2015-03-03 | 2015-07-08 | 中国水利水电第十工程局有限公司 | Rotating percussion-compact two-way pneumatic impact mole |
| CN115976456A (en) * | 2022-12-07 | 2023-04-18 | 镇江市博驰汽车配件有限公司 | Atmosphere circulating well type nitriding furnace and nitriding process for output shaft of hydraulic motor |
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