CN105757284A - Flow distribution control valve for hydraulic breaking hammer - Google Patents
Flow distribution control valve for hydraulic breaking hammer Download PDFInfo
- Publication number
- CN105757284A CN105757284A CN201610226202.7A CN201610226202A CN105757284A CN 105757284 A CN105757284 A CN 105757284A CN 201610226202 A CN201610226202 A CN 201610226202A CN 105757284 A CN105757284 A CN 105757284A
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- Prior art keywords
- valve
- spool
- valve pocket
- oil
- gap
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention provides a flow distribution control valve for a hydraulic breaking hammer. The flow distribution control valve comprises a valve sleeve and a valve cover which are connected to form a whole body, wherein the valve sleeve and the valve cover are internally provided with a valve element; the valve element can slide in an inner cavity formed by the valve sleeve and the valve cover to carry out oil distribution; the valve element has a large end part and a small end part, wherein the large end part is arranged in the valve cover and the small end part is arranged in an inner hole of the valve sleeve; a valve element oil through hole is formed in the inner part of the valve element. The valve element oil through hole is a direct-through hole, and one end close to the valve cover of the valve element oil through hole is communicated with an inner cavity of the valve cover. The flow distribution control valve provided by the invention is simple in structure and high in machining efficiency; raw materials are saved and 20 percent of the materials can be saved, so that the machining cost is saved at the same time; a gap of the flow distribution valve can be smaller than an existing flow distribution valve, so that the service life of the flow distribution valve can be prolonged.
Description
Technical field
The present invention relates to a kind of hydraulic breaking hammer with joining flow control valve, relate in particular to a kind of hydraulic breaking hammer used in mining, metallurgy, railway, highway, municipal administration gardens, building, boats and ships etc. with joining flow control valve, belong to technical field of engineering machinery.
Background technology
Hydraulic breaking hammer is called for short " quartering hammer " or " destroyer ", is mounted in the position installing bucket or bunker of excavator, loader, for broken stone, rock etc., is the capital equipment of outdoor mining activities.
Its operation principle is: with excavator, loader hydraulic pump for output power, with hydraulic oil for medium, control high-pressure and hydraulic oil tanker swap-in by flat valve and enter before and after the middle cylinder body of quartering hammer in chamber.So that the piston being arranged in middle cylinder is under the effect of pressure differential, it is achieved move back and forth.During stroke, in quartering hammer, the back cavity of cylinder enters high pressure liquid force feed, and piston is impacted drill steel cutter crushed rocks under the combined effect of the compressed nitrogen in upper cylinder half and hydraulic oil；During backhaul, middle cylinder ante-chamber connects hydraulic oil, moves and makes the nitrogen in upper cylinder body compress, so complete a cycle of operation after promoting piston.Stroke that piston goes round and begins again, backhaul, make drill steel impact grinding rock, stone, concrete etc..
Hydraulic breaking hammer is mainly used in following aspect: mining, metallurgy, railway, highway, municipal administration gardens construction and the aspect such as building and boats and ships, and purposes is very extensive, is a kind of broken facility of efficient modernization rock drilling.
China's hydraulic breaking hammer market has become one of three big hydraulic breaking hammer markets, the whole world.Use hydraulic breaking hammer more than 120,000, along with the exploitation of the outdoor mining industry of China prohibits the use of blasting procedure, hydraulic breaking hammer industry can obtain more rapidly developing.But in such fast development, power conveying " heart " of quartering hammer is joined flow control valve and still be there are some problems, so as to the unstable properties of hydraulic breaking hammer, use, production cost height, the use of mass is restricted.
Now with joining the structure of flow control valve as it is shown in figure 1, arrange 6-8 radially fuel feed hole A1 on spool, the other end arranges 6 holes；
Spool is provided with three sections of mating surfaces D, E, F, and F section changes of section is big, it is easy to from fracture of root.Valve gap is provided with a straight hole H and 6 inclined hole G.
There is a problem in that existing defects in 1. structures, the flat valve gap big life-span is short.Gap hour, spool is easily pulled locking when internal slide and was lost efficacy；When gap is big, flat valve life-span short quartering hammer hitting power is limited.
2. difficulty of processing big (mating surface is many), the big easy fracture of changes of section, consumption of raw material is many, and price is high.
Current China production domesticization built-in flat valve of hydraulic breaking hammer uses Korea S's import, and price is high, governs the fast development of China's hydraulic breaking hammer, affects the process of production domesticization.
Now need badly research and development a kind of can improve existing deficiency and be easy to production domesticization Novel hydraulic crushing hammer join flow control valve tool have very important significance.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of hydraulic breaking hammer with joining flow control valve, solves problem and the reduction difficulty of processing that presently, there are, improves stock utilization.
In order to solve the problems referred to above, the present invention by the following technical solutions:
A kind of hydraulic breaking hammer is with joining flow control valve, and including the valve pocket connected as one and valve gap, valve pocket and be provided with spool in valve gap, spool can slide at the interior intracavity of valve pocket and valve gap formation and carry out joining oil.
The following is the present invention further optimization to such scheme: spool has big end and small end, in the closed chamber that its big end is arranged on valve gap and valve pocket is formed, small end be arranged in the endoporus of valve pocket, spool be internally provided with spool oil through.Spool oil through is clear opening, near one end of valve gap and valve gap inner space.
As preferably, spool is arranged in the endoporus of valve pocket, is matched in clearance between the two；Valve gap is arranged on the periphery of spool, rests on all the time and is failure to actuate on the periphery of spool；In its valve gap, contact surface contacts with valve pocket outer face all the time.
As preferably, the excircle of spool is provided with three 120 ° of suspension oil film internal points of being separated by.
As preferably, on valve pocket, the one end near valve gap is provided with valve pocket outer face；One end relative with valve pocket on valve gap is provided with in valve gap contact surface；The small end face that valve gap contacts with valve pocket outer face is provided with six arc grooves, and described six arc grooves are evenly distributed ringwise.
As preferably, the excircle of valve pocket is radially disposed with valve pocket fuel feed hole, valve pocket spill port, valve pocket oil-feed push away valve opening.
Valve pocket is away from being provided with the valve pocket oil through connected with spool oil through in one end of valve gap；The diameter of section of valve pocket oil through is less than the cylindrical diameter of section of spool.
Being contacted by spool small end face and valve pocket outer face between the end of spool and valve pocket, spool can move back and forth between valve pocket outer face and valve gap inner face M.
As preferably, valve gap has the big outer face of valve gap, is provided with the valve gap big outer face seal groove of the mounting O-shaped sealing ring preventing hydraulic oil seepage on the big outer face of valve gap.
During installation, being installed in quartering hammer cylinder, external high pressure liquid force feed enters in oilhole road by the hydraulic oil ingate of cylinder in quartering hammer, and such high pressure liquid force feed will enter in the spool oil through of spool；High pressure liquid force feed also can enter into the big front end face of piston simultaneously, and after at this moment will promoting piston, shifting and piston do drawback movement.
In backward stroke of the piston process, when piston nose face moves in quartering hammer cylinder undercut in the first of cylinder, at this moment partial high pressure oil enters into the valve pocket oil-feed of valve pocket by duct connect with cylinder undercut in the 4th of cylinder undercut in first and middle cylinder the and pushes away in valve opening, and hydraulic oil enters into shifting after middle the end promotion spool of spool.
Move past after spool in journey, when spool small end face crosses valve pocket fuel feed hole, hydraulic oil by the valve pocket fuel feed hole of valve pocket, middle cylinder the 3rd in cylinder undercut and intercommunicating pore, cylinder undercut arrives large end face after piston in the 6th.Such backward stroke of the piston speed gradually decreases to zero, and piston starts stroke movement.Piston is in stroke movement process, when in the middle of piston, in undercut and the first of middle cylinder, cylinder undercut is connected, enter into the hydraulic oil communicated in duct in cylinder undercut in first in the second of middle cylinder in cylinder undercut, the second of middle cylinder is provided with in cylinder undercut oil return duct.At this moment the intermediate ends surface pressure pushing away spool reduces, owing to spool large end face C area is more than the area of section of the spool small end face of spool, spool starts to move forward, is cut off in valve pocket fuel feed hole hole, thus the supply of cutoff high oil, piston does the retarded motion of stroke gradually.
Along with travelling forward of piston, piston nose face is subject to hydraulic oil again and starts drawback movement.The hydraulic oil in piston rear end face is by cylinder undercut in the 6th, and intercommunicating pore, cylinder undercut is flowed in spill port road in the 3rd.
The function of flat valve be exactly alternately before piston after large end face, piston large end face configuration hydraulic oil, it is achieved piston back and forth rush drawback movement.
The present invention adopts such scheme, has the advantage that
1. valve flow control valve simple in construction, working (machining) efficiency is high.
2. save raw material, the material of 20% can be saved, save processing cost simultaneously.
3. the comparable used reduction in flat valve gap, can improve the service life of flat valve.
Below in conjunction with drawings and Examples, the invention will be further described.
Accompanying drawing explanation
Accompanying drawing 1 is now with the structural representation of quartering hammer flat valve in background of invention.
Accompanying drawing 2 is the hydraulic breaking hammer structural representation joining flow control valve in the embodiment of the present invention.
Accompanying drawing 3 is the section structure schematic diagram at Y-Y place in Fig. 2.
Accompanying drawing 4 is the section structure schematic diagram at X-X place in Fig. 2.
Accompanying drawing 5 is the hydraulic breaking hammer mounting structure schematic diagram joining flow control valve in the embodiment of the present invention.
In figure: 1-valve pocket；2-spool；3-valve gap；4-piston；Cylinder in 5-quartering hammer；6-quartering hammer upper cylinder half；A-piston nose face；B-piston rear end face；C-spool large end face；B1-valve pocket fuel feed hole；B2-valve pocket spill port；B3-valve pocket oil-feed pushes away valve opening；B4-spool small end face；B5-valve gap excircle seal groove；B6-valve gap big outer face seal groove；The big outer face of B7-valve gap；B8-internal thread hole；B9-suspension oil film internal point；B10-arc groove；M-valve gap inner face；N-valve pocket outer face；B11-valve pocket oil through；B12-spool oil through；B13-valve pocket outer face；Contact surface in B14-valve gap；B15-the first O；B16-the second O；End face in the middle of B17-；A1-is fuel feed hole radially；Cylinder undercut in A2-first；Cylinder undercut in A3-second；Cylinder undercut in A4-the 3rd；Cylinder undercut in A5-the 4th, cylinder undercut in A6-the 5th；A7-hydraulic oil ingate；A8-oilhole road；Cylinder undercut in A9-the 6th；A10-intercommunicating pore；A11-valve pocket small end face.
Detailed description of the invention
Embodiment, as in figure 2 it is shown, a kind of hydraulic breaking hammer is with joining flow control valve, including the valve pocket 1 connected as one and valve gap 3, valve pocket 1 and be provided with spool 2 in valve gap 3, spool 2 can slide at the interior intracavity of valve pocket 1 and valve gap 3 formation and carry out joining oil.
On valve pocket 1, the one end near valve gap 3 is provided with valve pocket outer face B13；One end relative with valve pocket 1 on valve gap 3 is provided with in valve gap contact surface B14；
Wherein one end of described spool 2 is arranged in the endoporus of valve pocket 1, the other end is arranged in valve gap 3；Spool 2 be internally provided with spool oil through B12.
Spool 2 is arranged in the endoporus of valve pocket 1, is matched in clearance between the two；Valve gap 3 is arranged on the periphery of spool 2, rests on all the time and is failure to actuate on the periphery of spool 2；In its valve gap, contact surface B14 contacts with valve pocket outer face B13 all the time.
Radially be disposed with valve pocket fuel feed hole B1 on the excircle of valve pocket 1, valve pocket spill port B2, valve pocket oil-feed push away valve opening B3；
Valve pocket 1 is provided with the valve pocket oil through B11 connected with spool oil through B12 in the one end away from valve gap 3；The diameter of section of valve pocket oil through B11 is less than the cylindrical diameter of section of spool 2；
The outer end of valve pocket 1 is provided with valve pocket outer face N.
Contacted by spool small end face B4 and valve pocket small end face A11 between the end of spool 2 with valve pocket 1.
Spool 2 can move back and forth between valve pocket small end face A11 and valve gap inner face M.
Valve gap 3 has the big outer face B7 of valve gap, is provided with the big outer face seal groove B6 of valve gap of the mounting O-shaped sealing ring preventing hydraulic oil seepage on the B7 of valve gap big outer face；
The outer round surface of valve gap 3 is provided with the valve gap excircle seal groove B5 of the mounting O-shaped sealing ring preventing hydraulic oil seepage.
Internal thread hole B8 it is provided with in valve gap 3；Can be used for dismantling valve gap 3.
The system that valve pocket 1, spool 2, valve gap 3 are assembled into joins flow control valve exactly, realizes flow function in the installing hole being loaded in hydraulic breaking hammer on cylinder.
Valve pocket 1, valve gap 3 are static in systems, and only spool moves back and forth.Through comparing: present configuration simple, easy to process but also can conservation.
As shown in Figure 3, in order to prevent spool 2 from catching phenomenon occurring in motor process, the φ 2mm suspension oil film internal point B9 that three circumference are separated by 120 ° uniform it is provided with at the middle part of spool 2, hydraulic oil enters from these three hole between valve pocket 1 and spool 2, spool 2 is made to be in a kind of suspended state, i.e. three hole suspended oil membrane structure all the time.
Valve pocket 1 and spool 2 are matched in clearance, and hydraulic oil can flow between the two.
As shown in Figure 4, the sensitivity affecting spool 2 commutation for preventing hydraulic oil from assembling at undercut place, spool 2 surface, namely can not form an annular seal space closed, in valve gap, contact surface B14 place is provided with six arc groove B10, described six arc groove B10 are evenly distributed ringwise so that it is exit into the oil return duct in the A groove arranged on middle cylinder 5.
As it is shown in figure 5, the working mechanism of the flow function of invention flat valve is as follows:
External high pressure liquid force feed enters in oilhole road A8 by the hydraulic oil ingate A7 of cylinder in quartering hammer 5, and such high pressure liquid force feed will enter in the spool oil through B12 of spool 2；High pressure liquid force feed also can enter into the piston nose face A of piston 4 simultaneously, and after at this moment will promoting piston 4, shifting and piston do drawback movement.
In piston 4 return stroke, when piston nose face A moves in quartering hammer cylinder undercut A2 in the first of cylinder 5, at this moment partial high pressure oil pushes away in valve opening B3 by entering into the valve pocket oil-feed of valve pocket 1 with duct (not shown) connect of cylinder undercut A5 in the 4th of cylinder undercut A2 in first and middle cylinder 5 the, and hydraulic oil enters into shifting after middle the end face B17 place promotion spool 2 of spool 2.
Move past after spool 2 in journey, when spool small end face B4 crosses valve pocket fuel feed hole B1, hydraulic oil by the valve pocket fuel feed hole B1 of valve pocket 1, middle cylinder 5 the 3rd in cylinder undercut A4 and intercommunicating pore A10, cylinder undercut A9 arrives piston rear end face B in the 6th.
Such piston 4 opening speed gradually decreases to zero, and piston starts stroke movement.Piston is in stroke movement process, when in the first of the middle undercut of piston 4 and middle cylinder 5, cylinder undercut A2 connects, the hydraulic oil in duct (pushing away the hydraulic oil of the middle end face B17 of spool 2) that communicates with in cylinder undercut A2 in first enter into middle cylinder 5 second in cylinder undercut A3, the second of middle cylinder 5 is provided with oil return duct in cylinder undercut A3.
At this moment the middle end face B17 end force pushing away spool 2 reduces, due to the spool large end face C area area of section more than the spool small end face B4 of spool 2, spool 2 starts to move forward, is cut off in valve pocket fuel feed hole B1 hole, thus the supply of cutoff high oil, piston does the retarded motion of stroke gradually.
Along with travelling forward of piston, piston nose face A is subject to hydraulic oil again and starts drawback movement.The hydraulic oil of piston rear end face B is by cylinder undercut A9, intercommunicating pore A10 in the 6th, cylinder undercut A4 is flowed in spill port road in the 3rd.
The function of flat valve is exactly alternately configure hydraulic oil at piston nose face A, piston rear end face B, it is achieved piston back and forth rush drawback movement.
In order to prevent hydraulic oil from leakage occurring between quartering hammer upper cylinder half 6 and middle cylinder 5, it is respectively provided with the first O B15 and the second O B16 in outer round surface and the end of valve gap 3.
After being mounted with the first O B15 and the second O B16, cylinder 5 therefrom takes out valve gap 3 relatively difficult, on valve gap 3, be provided with internal thread hole B8 for this, during dismounting, corresponding external thread rod is screwed in internal thread hole B8, pulls outward.
In the above-described embodiments, the preferred forms of the present invention is described, it is obvious that under the inventive concept of the present invention, still can make a lot of change.At this, it should illustrate, any change made under the inventive concept of the present invention falls within protection scope of the present invention.
Claims (9)
1. a hydraulic breaking hammer is with joining flow control valve, including the valve pocket (1) connected as one and valve gap (3), it is characterized in that: valve pocket (1) and be provided with spool (2) in valve gap (3), spool (2) can slide at the interior intracavity that valve pocket (1) and valve gap (3) are formed and carry out joining oil.
2. a kind of hydraulic breaking hammer according to claim 1 is with joining flow control valve, it is characterized in that: spool (2) has big end and small end, its big end is arranged in valve gap (3) and valve pocket (1), small end is arranged in the endoporus of valve pocket (1), spool (2) be internally provided with spool oil through (B12).
3. a kind of hydraulic breaking hammer according to claim 1 is with joining flow control valve, it is characterized in that: spool (2) is arranged in the endoporus of valve pocket (1), is matched in clearance between the two；Valve gap (3) is arranged on the periphery of spool (2), rests on all the time and is failure to actuate on the periphery of spool (2)；In its valve gap, contact surface (B14) contacts with valve pocket outer face (B13) all the time.
4. a kind of hydraulic breaking hammer according to claim 1 is with joining flow control valve, it is characterized in that: the excircle of spool (2) is provided with three 120 ° of suspensions oil film internal point (B9) of being separated by.
5. a kind of hydraulic breaking hammer according to claim 1 is with joining flow control valve, it is characterized in that: the upper one end near valve gap (3) of valve pocket (1) is provided with valve pocket outer face (B13)；The upper one end relative with valve pocket (1) of valve gap (3) is provided with in valve gap contact surface (B14)；The small end face of valve pocket outer face (B13) contact surface is provided with six arc grooves (B10), and described six arc grooves (B10) are evenly distributed ringwise.
6. a kind of hydraulic breaking hammer according to claim 1 is with joining flow control valve, it is characterized in that: be radially disposed with valve pocket fuel feed hole (B1) on the excircle of valve pocket (1), valve pocket spill port (B2), valve pocket oil-feed push away valve opening (B3).
7. a kind of hydraulic breaking hammer according to claim 2 is with joining flow control valve, it is characterized in that: valve pocket (1) is provided with the valve pocket oil through (B11) connected with spool oil through (B12) in the one end away from valve gap (3)；The diameter of section of valve pocket oil through (B11) is less than the cylindrical diameter of section of spool (2).
8. a kind of hydraulic breaking hammer according to claim 1 is with joining flow control valve, it is characterized in that: being contacted by spool small end face (B4) and valve pocket small end face (A11) between the end of spool (2) with valve pocket (1), spool (2) can move back and forth between valve pocket small end face (A11) and valve gap inner face M.
9. a kind of hydraulic breaking hammer according to claim 1 is with joining flow control valve, it is characterized in that: valve gap (3) has the big outer face of valve gap (B7), the big outer face of valve gap (B7) is provided with valve gap big outer face seal groove (B6) of the mounting O-shaped sealing ring preventing hydraulic oil seepage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610226202.7A CN105757284A (en) | 2016-04-13 | 2016-04-13 | Flow distribution control valve for hydraulic breaking hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610226202.7A CN105757284A (en) | 2016-04-13 | 2016-04-13 | Flow distribution control valve for hydraulic breaking hammer |
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| CN105757284A true CN105757284A (en) | 2016-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610226202.7A Pending CN105757284A (en) | 2016-04-13 | 2016-04-13 | Flow distribution control valve for hydraulic breaking hammer |
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| CN (1) | CN105757284A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108824542A (en) * | 2018-07-22 | 2018-11-16 | 赵德朝 | A kind of novel hydraulic crushing hammer |
| CN111219375A (en) * | 2020-03-03 | 2020-06-02 | 马鞍山市卡迈特液压机械制造有限公司 | Hydraulic breaking hammer reversing valve |
| CN116498623A (en) * | 2023-03-29 | 2023-07-28 | 邵阳先进制造技术研究院有限公司 | High-precision control valve for moving cylinder |
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| US20010043007A1 (en) * | 2000-05-09 | 2001-11-22 | Dong Nam Heavy Industries Co., Ltd. | Breaker using pneumatic and hydraulic pressures |
| CN101324278A (en) * | 2008-07-31 | 2008-12-17 | 南阳开天工程机械有限公司 | Hydraulic breaking hammer change-over valve and manufacturing method thereof |
| CN201279771Y (en) * | 2008-10-06 | 2009-07-29 | 南阳开天工程机械有限公司 | Hydraulic breaking hammer with built-in high impact work |
| CN105508116A (en) * | 2015-12-31 | 2016-04-20 | 青州市春晖科技发展有限公司 | Diesel engine circulation water thermostatic apparatus |
| CN205618729U (en) * | 2016-04-13 | 2016-10-05 | 山东天瑞重工有限公司 | Hydraulic breaking hammer is with joining in marriage flow control valve |
-
2016
- 2016-04-13 CN CN201610226202.7A patent/CN105757284A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010043007A1 (en) * | 2000-05-09 | 2001-11-22 | Dong Nam Heavy Industries Co., Ltd. | Breaker using pneumatic and hydraulic pressures |
| CN101324278A (en) * | 2008-07-31 | 2008-12-17 | 南阳开天工程机械有限公司 | Hydraulic breaking hammer change-over valve and manufacturing method thereof |
| CN201279771Y (en) * | 2008-10-06 | 2009-07-29 | 南阳开天工程机械有限公司 | Hydraulic breaking hammer with built-in high impact work |
| CN105508116A (en) * | 2015-12-31 | 2016-04-20 | 青州市春晖科技发展有限公司 | Diesel engine circulation water thermostatic apparatus |
| CN205618729U (en) * | 2016-04-13 | 2016-10-05 | 山东天瑞重工有限公司 | Hydraulic breaking hammer is with joining in marriage flow control valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108824542A (en) * | 2018-07-22 | 2018-11-16 | 赵德朝 | A kind of novel hydraulic crushing hammer |
| CN111219375A (en) * | 2020-03-03 | 2020-06-02 | 马鞍山市卡迈特液压机械制造有限公司 | Hydraulic breaking hammer reversing valve |
| CN116498623A (en) * | 2023-03-29 | 2023-07-28 | 邵阳先进制造技术研究院有限公司 | High-precision control valve for moving cylinder |
| CN116498623B (en) * | 2023-03-29 | 2023-12-15 | 邵阳先进制造技术研究院有限公司 | High-precision control valve for moving cylinder |
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