CN202545405U - Gas-liquid combined hydraulic impactor - Google Patents
Gas-liquid combined hydraulic impactor Download PDFInfo
- Publication number
- CN202545405U CN202545405U CN2012201774701U CN201220177470U CN202545405U CN 202545405 U CN202545405 U CN 202545405U CN 2012201774701 U CN2012201774701 U CN 2012201774701U CN 201220177470 U CN201220177470 U CN 201220177470U CN 202545405 U CN202545405 U CN 202545405U
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- Prior art keywords
- piston
- spool
- suction chamber
- oil suction
- oil
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- 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.)
- Expired - Lifetime
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- 239000007788 liquid Substances 0.000 title abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 23
- 238000000605 extraction Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000000446 fuel Substances 0.000 abstract description 6
- 230000035939 shock Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 238000009825 accumulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model discloses a gas-liquid combination type hydraulic pressure impacter, advance the oil extraction impacter including two-sided, two-sided advance the oil extraction impacter and include piston, liquid accuse switching-over valve and oil circuit, the piston tail end is provided with the nitrogen chamber, the nitrogen chamber with the piston connection department is sealing connection and the tail end of piston all sets up at return stroke and stroke in-process in the nitrogen chamber, the utility model discloses energy utilization is high for it is abundant to push away the valve pocket fuel feeding capacity, has prevented the production of "inhaling empty" phenomenon, has reduced hydraulic shock, vibration and noise, makes the job stabilization life-span extension of liquid accuse switching-over valve and piston.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly a kind of dynamic hydraulic combined type hydraulic impactor.
Background technique
Hydraulic impact device-or claim hydraulic shock formula quartering hammer; Be widely used at present in the social all trades and professions,, be used for the demolition work of concrete structure and cement pavement in traffic, construction industry; At metallurgy industry; Be used to remove smelted furnace cinder, steel mill's metal mixer disintegration cleaning work, in mining engineering, be applied to stope and ore removal diagrid mouth carries out the second-time breakage of ore deposit rock bulk.Formed at present an important emerging technology industry in the world.The structural type of hydraulic impact device mainly contains three types at present: (1) hydrostatic theory structure; (2) nitrogen expansion theory structure; (3) hydraulic pressure-nitrogen synergy theory structure.
Existing percussion mechanism based on hydraulic pressure-nitrogen synergy theory structure is joined oily mode because piston ante-chamber normal pressure back cavity intermittently advances the piston of oil extraction on the one hand because hydraulic impact device adopts the two-sided piston that advances oil extraction to join oily mode, makes that the instantaneous peak value flow is big, the ante-chamber back pressure resistance is big during stroke of piston; Selector valve pushes away valve pocket pressure oil and is directly supplied with by piston cylinder ante-chamber or back cavity on the other hand, but since spool in the switching-over movement process, the oil suction chamber valve port opening will experience the motion change process of changing from small to big again from large to small; Promptly when valve core movement arrived meta, the oil suction chamber valve port opening was minimum, and this moment, valve core movement speed was maximum; It is also maximum to push away the needed fuel delivery of valve pocket, and two contradict, and will cause like this to push away valve pocket fuel delivery wretched insufficiency; Form " inhaling empty " phenomenon; Cause hydraulic shock, vibration and noise, with the operating life that has a strong impact on valve and piston, and the device job insecurity that impacts; For this reason, must structurally take measures to solve.
The model utility content
The purpose of the utility model is to overcome the deficiency of existing technology and a kind of dynamic hydraulic combined type hydraulic impactor simple in structure, easy to use, stable and reliable for performance is provided.
A kind of dynamic hydraulic combined type hydraulic impactor; Comprise the two-sided oil extraction impactor that advances; Saidly two-sidedly advance the oil extraction impactor and comprise piston, pilot operated directional control valve and oil circuit; The said two-sided said piston tail end that advances the oil extraction impactor is provided with nitrogen chamber, and said nitrogen chamber and said piston joint are to be tightly connected and the tail end of said piston all is arranged in the said nitrogen chamber in backhaul and stroke procedure.
In the utility model; Said pilot operated directional control valve comprises valve body and spool; Said spool middle part is through hole and coaxial being installed in the said valve body; Said valve body is the hermetic cavity body, and said valve body is provided with two high pressure oil inlets, piston cylinder ante-chamber connection mouth, piston cylinder back cavity connection mouth, stroke feedback port, backhaul feedback port and oil return outlet, said spool be connected with said valve body inner seal and said spool can be in said valve body move left and right; Said spool outer side surface is provided with and constitutes between guide groove and the said valve body that independently a left side pushes away valve pocket, the right side pushes away valve pocket, left oil suction chamber and right oil suction chamber; Said high pressure oil inlet is communicated with said left oil suction chamber, and another high pressure oil inlet is communicated with said right oil suction chamber, and the hollow middle part of said spool is communicated with said oil return outlet.
In the utility model; Said spool pushes away on a said left side to be provided with between valve pocket and the left oil suction chamber with a said left side and pushes away the left repairing passage that valve pocket is communicated with; Said spool pushes away on the said right side to be provided with between valve pocket and the right oil suction chamber with the said right side and pushes away the right repairing passage that valve pocket is communicated with; Said left repairing passage when said spool moves right can with said left oil suction chamber UNICOM, said right repairing passage when said spool is moved to the left can with said right oil suction chamber UNICOM.
In the utility model; Said left repairing passage and said left oil suction chamber UNICOM when the left end of said left oil suction chamber and said piston cylinder back cavity connection mouth valve port opening are Z; Said right repairing passage and said right oil suction chamber UNICOM when the valve port opening of the right-hand member of said right oil suction chamber and said piston cylinder ante-chamber connection mouth is Z, said Z≤0.2mm.
Adopt said structure, the utlity model has following advantage:
1, in piston tail a nitrogen chamber is set, pressure oil gets into the piston ante-chamber and promotes the backward stroke of the piston motion during backward stroke of the piston, and the nitrogen in the nitrogen chamber is compressed and energy storage simultaneously, and this moment, a part of pressure oil got into high pressure accumulator and accumulation of energy.One side nitrogen expansion during stroke, high pressure accumulator is discharged a large amount of pressure oil and is got into the piston back cavity on the other hand, and piston realizes that under the acting in conjunction of these two power stroke quickens, thereby obtains bigger impact force, the capacity usage ratio height.
2, through being directed against " valve switching-over back suction " phenomenon; Let valve port opening also not reach minimum push away before valve pocket and pressure oil cavity connection; In time supplementary pressure oil helps spool to accomplish the switching-over motion, and feasible like this to push away the valve pocket fuel delivery abundant; Prevent generation, hydraulic shock, vibration and the noise of " inhaling empty " phenomenon, made the working stability life-span of pilot operated directional control valve and piston extend.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is for adopting the dynamic hydraulic combined type hydraulic impactor backward stroke of the piston structure principle chart of the utility model.
Fig. 3 is for adopting the dynamic hydraulic combined type hydraulic impactor stroke of piston structure principle chart of the utility model.
Embodiment
Below in conjunction with accompanying drawing, specify a kind of embodiment of dynamic hydraulic combined type hydraulic impactor.
A kind of dynamic hydraulic combined type hydraulic impactor; Comprise the two-sided oil extraction impactor that advances; Saidly two-sidedly advance the oil extraction impactor and comprise piston 1, pilot operated directional control valve and oil circuit; Said two-sided said piston 1 tail end that advances the oil extraction impactor is provided with nitrogen chamber 4; Said nitrogen chamber 4 and said piston 1 joint are to be tightly connected and the tail end of said piston 1 all is arranged in backhaul and stroke procedure in the said nitrogen chamber 4; Said pilot operated directional control valve comprises valve body 8 and spool 9, and said spool 9 is installed in the said valve body 8, and said valve body 8 comprises two high pressure oil inlets (10; 11), piston cylinder ante-chamber connection mouth 12, piston cylinder back cavity connection mouth 13, stroke feedback port 15, backhaul feedback port 14 and an oil return outlet 16, said spool 9 and said valve body 8 be tightly connected and said spool 9 and said valve body 8 between a formation left side push away valve pocket 17, the right side pushes away valve pocket 18, left oil suction chamber 19, right oil suction chamber 20 and goes out oil pocket 21.
The hydraulic impact device working state, when the spool 9 of piston 1 and pilot operated directional control valve 5 is in position shown in Figure 1 (backhaul initial position), pressure oil gets into percussion mechanism piston 1 cavity of resorption from the P mouth through pilot operated directional control valve 5 right oil suction chambers 20; At this moment, the epicoele of piston 1 communicates with oil return outlet 16 through pilot operated directional control valve 5, therefore; Piston 1 is upwards made drawback movement under the effect of cavity of resorption oil pressure, the nitrogen in the compressed nitrogen air chamber 4, and this moment, a part of pressure oil got into high pressure accumulator 7 and accumulation of energy; When the leave from office terrace A of piston 1 moved to backhaul feedback hole 2, the pressure oil of piston cavity of resorption got into spool 9 right sides through backhaul feedback hole 2 from backhaul feedback port 14 and pushes away valve pocket 18, and pressure oil begins to promote spool 9 and is moved to the left; At this moment, a left side pushes away valve pocket 17 and is connected with piston cylinder back cavity connection mouth 13 through stroke feedback hole 3, promptly communicates with oil return outlet 16; Thereby in valve body 8, accomplish the function of switching oil circuit thereby promote spool 9 to left movement through pressure oil, the working state (stroke initial position) as shown in Figure 2 of hydraulic impact device after selector valve switches oil circuit, at this moment; High pressure oil communicates with piston 1 epicoele through left oil suction chamber 19, and piston 1 cavity of resorption communicates with oil return outlet 16, so; Piston 1 is under the nitrogen expansion power acting in conjunction of oil pressure and piston tail nitrogen chamber 4, and the accelerated motion of beginning stroke is accomplished the one-shot circulation until the piston slap pick rod; Simultaneously, when piston 1 step surface B crossed stroke signal hole 3, the pressure oil of piston 1 epicoele pushed away valve pocket 17 through the left side that stroke feedback hole 3 gets into liquid controlled reversing valve core 9; At this moment; The right side of spool 9 pushes away valve pocket 18 and is connected with piston cylinder ante-chamber connection mouth 12, i.e. oil return outlet 16 communicates, therefore; Spool 9 moves right under the oil pressure effect accomplishes the function of switching oil circuit, and hydraulic impact device gets into impact cycles next time.
The measure of structurally taking to " valve switching-over back suction " phenomenon:
In minimum this situation of meta aperture, the core content of this device is to be employed in valve port opening also not reach before the minimum to spool 9, promptly lets push away valve pocket and the connection of pressure oil circuit, and in time supplementary pressure oil helps spool to accomplish the motion that commutates.
Concrete structure is as shown in Figure 1; Said spool 9 pushes away on a said left side to be provided with between valve pocket 17 and the left oil suction chamber 19 with a said left side and pushes away the left repairing passage 22 that valve pocket 17 is communicated with; Said spool 9 pushes away on the said right side to be provided with between valve pocket 18 and the right oil suction chamber 20 with the said right side and pushes away the right repairing passage 23 that valve pocket 18 is communicated with; Said left repairing passage 22 when said spool 9 moves right can with said left oil suction chamber 19 UNICOMs, said right repairing passage 23 when said spool 9 is moved to the left can with said right oil suction chamber 20 UNICOMs.Said left repairing passage 22 and said left oil suction chamber 19 UNICOMs when the high order end of said left oil suction chamber 19 and said piston cylinder back cavity connection mouth 13 valve port opening are Z; Said right repairing passage 23 and said right oil suction chamber 20 UNICOMs, said Z≤0.2mm (0.2mm is that valve port is stablized through-flow minimum aperture) when the low order end of said right oil suction chamber 20 and said piston cylinder ante-chamber connection mouth 12 connection mouth valve port opening are Z.Adopt this structure, in the right switching-over of spool 9 left-hands movement process, spool 9 is before Air-tight piston cylinder back cavity connection mouth 13; Make left oil suction chamber 20 be communicated with left repairing passage 22; Just push away valve pocket 17 and be communicated with, and this opportunity that is communicated with stroke feedback port 15 with a left side, just be exactly piston cylinder back cavity connection mouth 13 and left oil suction chamber 20 joint gaps be the moment of Z≤0.2mm; Why Z≤0.2mm be because; As Z≤0.2mm, just make left oil suction chamber 20 not stablize fuel feeding with piston cylinder back cavity connection mouth 13, prevent to influence the switching-over of spool 9; Can obtain stable fuel feeding and a left side that is communicated with left oil suction chamber 20 pushes away valve pocket 17, thereby stop the phenomenon of " valve switching-over back suction ".
Claims (4)
1. dynamic hydraulic combined type hydraulic impactor; Comprise the two-sided oil extraction impactor that advances; Saidly two-sidedly advance the oil extraction impactor and comprise piston, pilot operated directional control valve and oil circuit; It is characterized in that: said piston tail end is provided with nitrogen chamber, and said nitrogen chamber and said piston joint are to be tightly connected and the tail end of said piston all is arranged in the said nitrogen chamber in backhaul and stroke procedure.
2. dynamic hydraulic combined type hydraulic impactor according to claim 1; It is characterized in that: said pilot operated directional control valve comprises valve body and spool; Said spool middle part is through hole and coaxial being installed in the said valve body; Said valve body is the hermetic cavity body; Said valve body is provided with two high pressure oil inlets, piston cylinder ante-chamber connection mouth, piston cylinder back cavity connection mouth, stroke feedback port, backhaul feedback port and oil return outlet; Said spool be connected with said valve body inner seal and said spool can be in said valve body move left and right, said spool outer side surface is provided with and constitutes between guide groove and the said valve body that independently a left side pushes away valve pocket, the right side pushes away valve pocket, left oil suction chamber and right oil suction chamber, said high pressure oil inlet is communicated with said left oil suction chamber; Another high pressure oil inlet is communicated with said right oil suction chamber, and the hollow middle part of said spool is communicated with said oil return outlet.
3. dynamic hydraulic combined type hydraulic impactor according to claim 2; It is characterized in that: said spool pushes away on a said left side to be provided with between valve pocket and the left oil suction chamber with a said left side and pushes away the left repairing passage that valve pocket is communicated with; Said spool pushes away on the said right side to be provided with between valve pocket and the right oil suction chamber with the said right side and pushes away the right repairing passage that valve pocket is communicated with; Said left repairing passage when said spool moves right can with said left oil suction chamber UNICOM, said right repairing passage when said spool is moved to the left can with said right oil suction chamber UNICOM.
4. dynamic hydraulic combined type hydraulic impactor according to claim 3; It is characterized in that: said left repairing passage and said left oil suction chamber UNICOM when the left end of said left oil suction chamber and said piston cylinder back cavity connection mouth valve port opening are Z; Said right repairing passage and said right oil suction chamber UNICOM when the valve port opening of the right-hand member of said right oil suction chamber and said piston cylinder ante-chamber connection mouth is Z, said Z≤0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201774701U CN202545405U (en) | 2012-04-24 | 2012-04-24 | Gas-liquid combined hydraulic impactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201774701U CN202545405U (en) | 2012-04-24 | 2012-04-24 | Gas-liquid combined hydraulic impactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202545405U true CN202545405U (en) | 2012-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201774701U Expired - Lifetime CN202545405U (en) | 2012-04-24 | 2012-04-24 | Gas-liquid combined hydraulic impactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202545405U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635588A (en) * | 2012-04-24 | 2012-08-15 | 长沙理工大学 | Gas-liquid combined hydraulic impactor |
| CN105221148A (en) * | 2015-09-21 | 2016-01-06 | 中国神华能源股份有限公司 | A kind of side valve type high-frequency hydraulic impactor |
| CN106677775A (en) * | 2016-12-16 | 2017-05-17 | 中国神华能源股份有限公司 | Hydraulic control loop for impacting cutting teeth and impacting cutting tooth assembly |
-
2012
- 2012-04-24 CN CN2012201774701U patent/CN202545405U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635588A (en) * | 2012-04-24 | 2012-08-15 | 长沙理工大学 | Gas-liquid combined hydraulic impactor |
| CN102635588B (en) * | 2012-04-24 | 2014-10-29 | 长沙理工大学 | Gas-liquid combined hydraulic impactor |
| CN105221148A (en) * | 2015-09-21 | 2016-01-06 | 中国神华能源股份有限公司 | A kind of side valve type high-frequency hydraulic impactor |
| CN105221148B (en) * | 2015-09-21 | 2017-11-03 | 中国神华能源股份有限公司 | A kind of side valve type high-frequency hydraulic impactor |
| CN106677775A (en) * | 2016-12-16 | 2017-05-17 | 中国神华能源股份有限公司 | Hydraulic control loop for impacting cutting teeth and impacting cutting tooth assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121121 Effective date of abandoning: 20141029 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20121121 Effective date of abandoning: 20141029 |
|
| RGAV | Abandon patent right to avoid regrant |