US20150144369A1 - Hammer Raising Device - Google Patents

Hammer Raising Device Download PDF

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Publication number
US20150144369A1
US20150144369A1 US14/406,567 US201314406567A US2015144369A1 US 20150144369 A1 US20150144369 A1 US 20150144369A1 US 201314406567 A US201314406567 A US 201314406567A US 2015144369 A1 US2015144369 A1 US 2015144369A1
Authority
US
United States
Prior art keywords
piston
sub
main
cylinder
hammer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US14/406,567
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English (en)
Inventor
Jong Jik Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHINWOO HEAVY INDUSTRY Co Ltd
Original Assignee
SHINWOO HEAVY INDUSTRY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHINWOO HEAVY INDUSTRY Co Ltd filed Critical SHINWOO HEAVY INDUSTRY Co Ltd
Assigned to SHINWOO HEAVY INDUSTRY CO., LTD. reassignment SHINWOO HEAVY INDUSTRY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEE, JONG JIK
Publication of US20150144369A1 publication Critical patent/US20150144369A1/en
Abandoned legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B1/00—Percussion drilling
    • E21B1/02—Surface drives for drop hammers or percussion drilling, e.g. with a cable
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/02—Placing by driving
    • E02D7/06—Power-driven drivers
    • E02D7/08—Drop drivers with free-falling hammer
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B1/00—Percussion drilling

Definitions

  • the present invention relates to a hammer raising device, and more particularly, to a hammer raising device capable of increasing striking intensity of a piston by eliminating fluid resistance within a main cylinder and the piston when the piston raised upward is lowered downward.
  • a hammer refers to a device that is attached to equipment such as a loader or an excavator having a hydraulic pump, controls a high-pressure fluid supplied form the hydraulic pump by a predetermined flow path and a valve, raises and lowers a piston provided within the hydraulic hammer to strike a tool, and allows the tool to crush a rock bed or a concrete ground due to a reaction force.
  • FIG. 1 shows a hydraulic hammer according to the related art.
  • a configuration and an operation of the hydraulic hammer according to the related art will be described in detail with reference to FIG. 1 .
  • the hydraulic hammer includes a valve, an accumulator, a cylinder, a piston, and a charging-gas storage.
  • a valve an accumulator, a cylinder, a piston, and a charging-gas storage.
  • other configurations other than the aforementioned configurations may be included in the hydraulic hammer.
  • a valve 100 When a valve 100 is open, a high-pressure fluid supplied from a hydraulic pump is introduced into a cylinder 102 .
  • a piston 102 accommodated within a cylinder 108 is raised by a pressure of the introduced fluid.
  • the piston 102 has a cylindrical shape, and has a shape whose central portion protrudes.
  • the cylinder 108 has a vent hole for accommodating the piston 102 , and induces a vertical movement of the piston 102 .
  • a diameter of the vent hole of the cylinder 108 is not uniform such that the piston 102 having the shape whose central portion protrudes can vertically move within a predetermined range. That is, the vent hole of the cylinder is formed such that a region of the vent hole where the protruding portion of the piston 102 vertically moves has a diameter larger than that of another region of the vent hole.
  • a gas stored in a charging-gas storage 106 formed at an upper part of the cylinder is slowly compressed by the raising of the piston 102 .
  • the valve 100 is closed, and the piston moves downward by a weight of the piston 102 and a force of the compressed gas in the charging-gas storage 106 .
  • the fluid located between the cylinder and the piston moves to an accumulator 104 .
  • the hydraulic hammer according to the related art crushes a rock bed or a concrete bed by repeating the aforementioned operations.
  • a sealing member is provided at a lower end so as not to allow the high-pressure fluid to leak into the gap between the piston and the cylinder, and, thus, an acceleration of the cylinder moving downward due to friction between the piston and the cylinder is decreased.
  • a sealing member 88 which is located at the lower end as the sealing member for sealing the piston and the cylinder may be damaged due to the friction, and in order to maintain a desired sealing state, the damaged member needs to be periodically replaced with new one.
  • FIG. 1 shows a hydraulic hammer according to the related art.
  • FIG. 2 shows a hammer device according to an embodiment of the present invention.
  • FIG. 3 shows a hammer device according to another embodiment of the present invention.
  • FIGS. 4A to 4C show a structure of a main-piston raising device according to the embodiment of the present invention.
  • An object of the present invention is to provide a method of increasing striking intensity of a piston by decreasing a frictional force between the piston and a cylinder to increase an acceleration of the piston moving downward.
  • Another object of the present invention is to provide a method capable of reducing management cost since a sealing member formed at a lower end to seal a gap between the piston and the cylinder is not used.
  • Still another object of the present invention is to provide a method of additionally preventing an overheating phenomenon between the cylinder and the piston without using a large-sized drain pipe for reducing resistance at a drain line.
  • an embodiment of the present invention provides a hammer raising device including: a hydraulic control valve that controls a supply of a fluid; a sub cylinder to which the fluid is supplied by an operation of the hydraulic control valve; a sub piston that is partially accommodated within the sub cylinder, and is raised or lowered by the fluid; a main piston that comes in close contact with a longitudinal end of the sub piston to be raised by the raising of the sub piston, and is lowered when the closely contacted longitudinal end of the sub piston is separated; and a main cylinder that accommodates the main piston.
  • a separate sealing member is not used between the main cylinder and the main piston. In this way, since the separate sealing member is not used, it is possible to prevent an acceleration from being decreased due to resistance caused by a frictional force between the main cylinder and the main piston. Further, since the main piston is raised using a plurality of sub pistons, it is possible to increase the number of times of striking of the piston.
  • the hammer device in the hammer device according to the present invention, it is possible to freely adjust a movement range of the main piston for striking. That is, in the existing hammer device, it is necessary to introduce the fluid into the main cylinder, and it is necessary to increase the amount of the introduced fluid depending on the movement range of the main piston. However, in the hammer device according to the present invention, since the sub piston is used without introducing the fluid into the main cylinder, it is possible to freely adjust the movement range.
  • FIG. 2 shows a hammer device according to an embodiment of the present invention.
  • the hammer device according to the embodiment of the present invention will be now described in detail with reference to FIG. 2 .
  • the hammer device includes a hydraulic control valve, a main cylinder, a main piston, a sub cylinder, a sub piston, and a charging-gas storage.
  • a hydraulic control valve a main cylinder, a main piston, a sub cylinder, a sub piston, and a charging-gas storage.
  • a hydraulic control valve 200 controls movement of a high-pressure fluid supplied from a hydraulic pump.
  • the hydraulic control valve 200 When the hydraulic control valve 200 is open, the fluid supplied from the hydraulic pump is supplied to a sub cylinder 202 .
  • the high-pressure fluid supplied to the sub cylinder 202 raises a sub piston 204 within the sub cylinder 202 .
  • the sub piston 204 comes in close contact with a lower end of a protruding portion of a main piston 206 , and the main piston 206 is also raised by the raising of the sub piston 204 .
  • the main piston 206 has a cylindrical shape, and has a shape whose central portion protrudes.
  • a main cylinder 208 has a vent hole for accommodating the main piston 206 therein, and induces a vertical movement of the main piston 206 .
  • a diameter of the vent hole is not uniform such that the main piston 206 having the shape (protruding portion) whose central portion protrudes can vertically move within a predetermined range. That is, a region of the vent hole where the protruding portion of the main piston 206 vertically moves has a diameter larger than that of another region of the vent hole.
  • a range of the vertical movement of the main piston 206 within the main cylinder 208 may be variously changed depending on an intention of a manufacturer. In the present invention, since the main piston is raised using the sub piston, a lower-end sealing member is not needed between the main piston and the main cylinder.
  • a gas stored in a charging-gas storage 210 formed at an upper part of the main cylinder 208 is compressed by the raising of the main piston 206 .
  • a switching valve (not shown) is operated.
  • the sub piston 204 is separated from a lower end of the main piston 206 by the operation of the switching valve, and when the sub piston 204 is separated, the main piston 206 moves downward by a weight of the main piston 206 and a force of the compressed gas stored in the charging-gas storage 210 .
  • the hydraulic control valve 200 is simultaneously closed. In this case, a frictional force is not generated between the main piston 206 and the main cylinder 208 as described above, and, thus, an acceleration of the main cylinder moving downward is more increased than that in the related art.
  • the hydraulic hammer according to the related art has a demerit in that a size of the accumulator and the amount of the supplied fluid need to be increased in order to adjust the range of the vertical movement of the piston within the cylinder.
  • the sub piston 204 separated from the main piston 206 moves downward, and the sub piston moved downward raises the main piston.
  • the main piston has the shape whose central portion protrudes, but the present invention is not limited thereto. That is, a groove having a predetermined depth is formed at the central portion of the main piston, and the sub piston can raise the main piston by using the formed groove.
  • FIG. 3 shows a hammer device according to another embodiment of the present invention.
  • the hammer device according to the another embodiment of the present invention will be now described in detail with reference to FIG. 3 .
  • the hammer device includes a first hydraulic control valve, a second hydraulic control valve, a main cylinder, a main piston, a first sub cylinder, a second sub cylinder, a first sub piston, a second sub piston, and a charging-gas storage.
  • a first hydraulic control valve a second hydraulic control valve
  • main cylinder a main piston
  • first sub cylinder a first sub cylinder
  • second sub cylinder a first sub piston
  • a second sub piston a charging-gas storage
  • a first hydraulic control valve 300 controls supplying of a high-pressure fluid supplied from a hydraulic pump to a first sub cylinder 302 .
  • a second hydraulic control valve 320 controls supplying of the high-pressure fluid supplied from the hydraulic pump to a second sub cylinder 312 .
  • first hydraulic control valve 300 When the first hydraulic control valve 300 is open, the fluid supplied from the hydraulic pump is supplied to the first sub cylinder 302 .
  • second hydraulic control valve 320 When the second hydraulic control valve 320 is open, the fluid supplied from the hydraulic pump is supplied to the second sub cylinder 312 .
  • the first hydraulic control valve 300 and the second hydraulic control valve 310 are not simultaneously open but are alternately open.
  • the high-pressure fluid supplied to the first sub cylinder 302 raises a first sub piston 304 within the first sub cylinder 302 .
  • the first sub piston 304 comes in close contact with a lower end of a protruding portion of a main piston 306 , and the main piston is also raised by the raising of the first sub piston 304 .
  • a gas stored in a charging-gas storage 310 formed at an upper part of a main cylinder 308 is compressed by the raising of the main piston 306 .
  • a first switching valve (not shown) is operated.
  • the first sub piston 304 is separated from a lower end of the main piston 306 by the operation of the first switching valve, and when the first sub piston 304 is separated, the main piston 306 moves downward by a weight of the main piston 306 and a force of the compressed gas stored in the charging-gas storage 310 .
  • the first hydraulic control valve 300 is simultaneously closed.
  • the second sub cylinder 312 , a second sub piston 314 , and a second switching valve perform the same operations as those of the first sub cylinder 302 , the first sub piston 304 , and the first switching valve.
  • a first drive unit including the first sub cylinder 302 , the first sub piston 304 and the first switching valve and a second drive unit including the second sub cylinder 312 , the second sub piston 314 and the second switching valve do not perform the same operation at the same point of time but alternately perform the operations at a regular period.
  • FIG. 3 It is illustrated in FIG. 3 that two hydraulic control valves are provided, but the present invention is not limited thereto. That is, two sub pistons may be operated using one hydraulic control valve.
  • FIGS. 4A to 4C show methods of raising the main piston depending on a structure thereof according to the embodiment of the present invention.
  • the raising method according the structure of the main piston according to the embodiment of the present invention will be now described in detail wither reference to FIG. 4 .
  • the main piston has a groove, and a main-piston raising device 400 comes in close contact with the groove.
  • the main-piston raising device 400 is connected to a longitudinal end of the sub piston.
  • the main-piston raising device 400 is located on a lower side where the groove is formed, and the main piston is raised by the raising of the main-piston raising device 400 .
  • the switching valve separates the main-piston raising device 400 from the main piston.
  • the main piston has the groove, and the main-piston raising device comes in close contact with the groove.
  • the main-piston raising device 400 is connected to the longitudinal end of the sub piston.
  • the main-piston raising device 400 is located on an upper side where the groove is formed, and the main piston is raised by the raising of the main-piston raising device 400 .
  • the switching valve separates the main-piston raising device 400 from the main piston.
  • the main piston has a “T” shape, and the main-piston raising device 400 comes in close contact with a lower end of the “T” shape.
  • the main-piston raising device 400 is connected to the longitudinal end of the sub piston.
  • the main-piston raising device is located at the lower end of the “T” shape, and the main piston is raised by the raising of the main-piston raising device.
  • the main piston reaches the maximum point, the main-piston raising device 400 is automatically separated from the main piston.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Fluid-Pressure Circuits (AREA)
US14/406,567 2012-06-14 2013-06-12 Hammer Raising Device Abandoned US20150144369A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR10-2012-0063876 2012-06-14
KR1020120063876A KR101327392B1 (ko) 2012-06-14 2012-06-14 해머 상승 장치
PCT/KR2013/005180 WO2013187691A1 (ko) 2012-06-14 2013-06-12 해머 상승 장치

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2013/005180 A-371-Of-International WO2013187691A1 (ko) 2012-06-14 2013-06-12 해머 상승 장치

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/888,509 Continuation-In-Part US20180154506A1 (en) 2012-06-14 2018-02-05 Hammer Raising Device

Publications (1)

Publication Number Publication Date
US20150144369A1 true US20150144369A1 (en) 2015-05-28

Family

ID=49758458

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/406,567 Abandoned US20150144369A1 (en) 2012-06-14 2013-06-12 Hammer Raising Device

Country Status (6)

Country Link
US (1) US20150144369A1 (zh)
JP (1) JP6200496B2 (zh)
KR (1) KR101327392B1 (zh)
CN (1) CN104364458B (zh)
DE (1) DE112013002983B4 (zh)
WO (1) WO2013187691A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180154506A1 (en) * 2012-06-14 2018-06-07 Shinwoo Heavy Industry Co., Ltd. Hammer Raising Device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101575059B1 (ko) 2014-08-13 2015-12-08 대모 엔지니어링 주식회사 스프링 및 압축가스식 브레이커

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4343368A (en) * 1978-12-27 1982-08-10 Fadeev Vladimir Y Idle stroke braking unit for an impact device
US20050199405A1 (en) * 2002-05-17 2005-09-15 Yrjo Raunisto Device producing hammering

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB259592A (en) * 1925-10-08 1928-01-09 Henri Cuinier Improvements in automatic perforating hammers
JPS4731818B1 (zh) * 1969-05-19 1972-08-16
US3872934A (en) * 1973-10-30 1975-03-25 Nippon Pneumatic Mfg Impact tool
JPS5187307A (ja) * 1975-01-29 1976-07-30 Shiraishi Found Soonboshikuiuchisochi
JPS528608A (en) * 1975-07-10 1977-01-22 Tonan Kiso Kougiyou Kk Apparatus for locating premoulded hollow piles
CH638587A5 (de) * 1979-02-12 1983-09-30 Uster Spindel Motoren Maschf Schlagbohrhammer.
JPS568989Y2 (zh) * 1979-09-04 1981-02-27
FI78158C (fi) * 1986-05-09 1989-06-12 Tampella Oy Ab Anordning vid en borrmaskin foer lagring av ett rotationsstycke.
FR2639279B1 (fr) * 1988-11-23 1991-01-04 Eimco Secoma Appareil de percussion hydraulique avec dispositif de frappe en retrait amortie
JP2813003B2 (ja) * 1989-09-19 1998-10-22 日本ニューマチック工業株式会社 衝撃動装置
DE4017029A1 (de) 1990-05-26 1991-11-28 Delmag Maschinenfabrik Hydrobaer
JP2744999B2 (ja) * 1991-09-30 1998-04-28 川鉄テクノコンストラクション株式会社 水圧ハンマー装置
JPH07157240A (ja) * 1993-12-09 1995-06-20 Mitsubishi Electric Corp 油圧エレベーター装置
JP3676879B2 (ja) * 1995-07-25 2005-07-27 株式会社マキタ 締結具打込み工具
JP5026640B2 (ja) 2001-02-14 2012-09-12 株式会社スギヤス 車両整備用リフト
KR100724043B1 (ko) * 2005-10-13 2007-06-04 최해곤 차량용 승강식 회전광고장치
FI121220B (fi) * 2008-11-20 2010-08-31 Sandvik Mining & Constr Oy Kallioporakone ja aksiaalilaakerimoduuli
KR20110098352A (ko) * 2010-02-26 2011-09-01 삼성테크윈 주식회사 착용형 로봇용 구동기

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4343368A (en) * 1978-12-27 1982-08-10 Fadeev Vladimir Y Idle stroke braking unit for an impact device
US20050199405A1 (en) * 2002-05-17 2005-09-15 Yrjo Raunisto Device producing hammering

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180154506A1 (en) * 2012-06-14 2018-06-07 Shinwoo Heavy Industry Co., Ltd. Hammer Raising Device

Also Published As

Publication number Publication date
JP2015519215A (ja) 2015-07-09
JP6200496B2 (ja) 2017-09-20
WO2013187691A1 (ko) 2013-12-19
DE112013002983T5 (de) 2015-03-12
CN104364458B (zh) 2016-08-24
CN104364458A (zh) 2015-02-18
KR101327392B1 (ko) 2013-11-08
DE112013002983B4 (de) 2021-07-29

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SHINWOO HEAVY INDUSTRY CO., LTD., KOREA, REPUBLIC

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LEE, JONG JIK;REEL/FRAME:034435/0499

Effective date: 20141208

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION