CN100342089C - Hydraulic hammer - Google Patents
Hydraulic hammer Download PDFInfo
- Publication number
- CN100342089C CN100342089C CNB021443947A CN02144394A CN100342089C CN 100342089 C CN100342089 C CN 100342089C CN B021443947 A CNB021443947 A CN B021443947A CN 02144394 A CN02144394 A CN 02144394A CN 100342089 C CN100342089 C CN 100342089C
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- hammer
- piston
- hydraulic cylinder
- main body
- stake
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The present invention relates to a hydraulic hammer which comprises a tubular main body provided with an upper flange and a lower flange, a hammer body positioned in the main body, a transmission hydraulic cylinder fixed on the upper flange, a piston rod connected with the hammer body, a hydraulic transmission pump which is suitable for the hammer, and a plurality of buffers arranged on the upper flange of the main body, wherein the main body is provided with a gripping device which is used for connecting the main body with a stake in the stake pulling-up mode, the hammer body can be moved to and fro along the main body, the pump is provided with a delivery pipe line and a discharge pipe line which are connected with the chamber of the transmission hydraulic cylinder by hydraulic distributors, and the hydraulic hammer is provided with two or more buffers. The buffers are made into a form of buffering hydraulic cylinders with pistons, and the chambers of the buffering hydraulic cylinders are filled with elastic mediums. The pistons face the side of the hammer body, and therefore, the end surfaces of the pistons and the hammer body can interact on the occasion of impacting in the stake pulling-up mode.
Description
Technical field
The application relates to and has hydraulicdriven plektron equipment, with hammer body difform piling bar (pile tube, box stake and the piling bar that is formed by the different shape welding) is knocked in the earth and also can be pulled out again.
Background technology
To one of the problem of from the earth, extracting the maximum that runs in the development of stake with hydraulic hammer be exactly: when the kinetic energy of hammer body is transformed into the merit of extracting stake from the earth, how to reduce the peak load on each parts that acts on hammer.
Existing BSP set hammer (Specification sheet Hydropile hammer, InternationalFoundations Limited) comprising: the hydraulic cylinder that has piston rod; Can upwards clash into the hammer bodies of two anchor clamps of placing in opposite directions, anchor clamps, and then are suspended on the hawser of pile driver on roller by cable suspended.The energy that anchor clamps are impacted passes on two anchor clamps that engage with stake along two pairs of hawsers.In this case, when lacking the peak value shock loading in fact, because long hawser is good snubber, so realized main purpose.
Yet a shortcoming of existing hammer is that almost half impact energy will spend on the elastic deformation, and promptly impact energy is very low to the efficient that stake transmits.In addition, the whole device that is used to extract stake is arranged on the outside of hammer, thereby the appearance and size of this device has increased the size of hammer greatly.Another shortcoming is, with regard to structure and technology, the diameter that is suitable for the hawser of use in this device is limited, and therefore the maximum possible power that is used for stake is extracted from the earth is limited, and this just makes hammer can not be used for pulling out for example major diameter or the big stake of length from the earth.All these shortcomings of mentioning all are owing to used the snubber of too little rigidity, promptly have the long wirerope than high power capacity when stretching.
Existing IHC type hydraulic hammer (IHC HYDROHAMMER, Dutch Kinderij dedicated hydraulic hammer) comprises the main body that is provided with upper flange and lower flange, and this main body is furnished with: extracting under the stake state, be used for main body is connected to anchor clamps on the stake; Be positioned at the hammer body of body interior, this hammer body can move back and forth along main body; Be fixed to the transmission fluid cylinder pressure on the main body upper flange; The piston rod that can link to each other with hammer body; The hydraulicdriven pump that is used to hammer into shape, this pump is provided with feed-line and discharge pipe line, these two pipelines are delivered on the stake via the short connector of rigidity, this connector hook hammer on the main body support and a similar support on the stake.The energy of hammer body is delivered on the hammer main body via the thin-wall bush that is positioned on the main body upper flange.Like this, the elastic deformation by said sleeve, hammer main body and connector has just weakened impact.
The shortcoming of this structure is that the rigidity of snubber is excessive, and causes having reduced inadequately the peak load that acts on the hammer parts.
Maximally related similar tool is patent RU2059045 C1, disclosed hydraulic hammer among the E02D7/10, and this hydraulic hammer comprises the main body that is provided with upper flange and lower flange, this main body is provided with: extracting under the stake state, be used for main body is connected to anchor clamps on the stake; Be positioned at the hammer body of body interior, this hammer body can move back and forth along main body; The described transmission fluid cylinder pressure of transmission fluid cylinder pressure that is fixed on the main body upper flange is provided with chamber; Be placed in the described chamber of described transmission fluid cylinder pressure and the piston rod that links to each other with hammer body; The hydraulicdriven pump that is used to hammer into shape, this pump are provided with a feed-line and a discharge pipe line, and these two pipelines link to each other with the chamber of transmission fluid cylinder pressure via a pressure distributor.In the upper flange of main body, snubber is installed.
The shortcoming of this hammer is: what it was required can obtain satisfied shock-absorption quality and guarantee that the elastomeric material of the reliability of snubber does not exist.
Summary of the invention
The objective of the invention is to improve the efficient of extracting the stake operation, and by using optimum snubber to make hammer that reliability and long-life be arranged.
Above-mentioned purpose can be achieved being used for knocking in the earth and extract on the hydraulic hammer of piling bar.This hydraulic hammer comprises: be provided with the tubular body of upper flange and lower flange, this main body is provided with anchor clamps, and these anchor clamps are used for main body being connected to this stake extracting under the pattern of stake; Be positioned at the hammer body of body interior, this hammer body can move back and forth along main body; Be fixed to the transmission fluid cylinder pressure on the upper flange; The piston rod that links to each other with hammer body; The hydraulicdriven pump that is used to hammer into shape, this pump is provided with feed-line and discharge pipe line, and these two pipelines link to each other via the chamber of pressure distributor with the transmission fluid cylinder pressure; Be located at a plurality of snubbers of the upper flange of main body, it is characterized in that: this hydraulic hammer is provided with two or more snubbers, they are made into the form of the buffering hydraulic cylinder that has piston, the chamber of this buffering hydraulic cylinder is filled with elastic fluid, described piston area is to the side of hammer body, like this, in extracting the pattern of described stake, can make piston end face impact interaction constantly with hammer body.
The chamber of buffering hydraulic cylinder through a flow direction towards the one way valve of buffering hydraulic cylinder and can link to each other with feed-line or discharge pipe line.
The annulus that the piston of each buffering hydraulic cylinder all has the outer cylinder surface of two different-diameters and connects them, and aforesaid two surfaces and annulus match with the corresponding inner periphery of hydraulic cylinder and the surface that is connected their annulus respectively.The less piston face of diameter is towards this hammer body.
At next-door neighbour's annulus place, on the surface than minor diameter of each piston or cushion dashpot, formed cannelure, the chamber of this cannelure links to each other with discharge pipe line, and the cooperation place of each piston and buffering hydraulic cylinder is provided with seal from a side of cannelure, and is relative with annulus.
Utilization has the hammer of this structural concept, the time marquis who takes out stake, and the piston end face of hammer body damping of shocks hydraulic cylinder, and piston is moved in the inside of buffering hydraulic cylinder.As a result, the pressure of the medium in the buffering hydraulic cylinder chamber increases, and the kinetic energy of hammer body just is transformed into the energy of the elastic fluid of pressurized in buffering hydraulic cylinder.The energy of the elastic fluid of elasticity pressurized is transformed into the merit that hammer main body and the stake that is attached thereto are moved in buffering hydraulic cylinder.Wherein, the power on the main body of the acting on pressure that equals the elastic fluid in the chamber of buffering hydraulic cylinder with than the area of all piston end face of major diameter one side and product.This force value depends on the volume of the elastic fluid in the chamber of buffering hydraulic cylinder.Therefore, in order to obtain to act on required power on hammer and the stake,, can determine that piston end face is amassed for the hammer of every kind of pattern, the optimum combination of the volume of the quantity of buffering hydraulic cylinder and elastic fluid.
Description of drawings
Fig. 1 shows the longitudinal section of hammer of the present invention;
Fig. 2 shows the longitudinal section of buffering hydraulic cylinder when its initial position in the one embodiment of the invention; This moment, hammer body did not act on the piston;
Fig. 3 shows the partial longitudinal section of the buffering hydraulic cylinder in the another embodiment of the present invention;
Fig. 4 shows the partial longitudinal section of the buffering hydraulic cylinder among another embodiment of the present invention.
The specific embodiment
The hydraulic hammer that is used for knocking in piling bar 1 in the ground and extracts comprises: the tubular body 2 that is provided with upper flange 3 and lower flange 4; Main body 2 is connected to anchor clamps 5 on the stake 1; Hammer body 6; Be fixed to the transmission fluid cylinder pressure 7 on the upper flange 3; The piston rod 8 of transmission fluid cylinder pressure, this piston rod engages with hammer body 6; The hydraulically powered pump 9 of hammer, this pump is provided with feed-line 10 and discharge pipe line 11, and these two pipelines link to each other with the chamber of hydraulic cylinder 7 with 14 by pipeline 13 via a pressure distributor 12.The buffering hydraulic cylinder 15 that has piston 16 is arranged in upper flange 3.
The chamber 17 of buffering hydraulic cylinder 15 can link to each other with feed-line or can link to each other with discharge pipe line 11 through piping 19 through piping 18.
Having flow direction can be arranged on pipeline 18 or 19 towards the one way valve 20 of buffering hydraulic cylinder 15.
The piston 16 of buffering hydraulic cylinder 15 has the outer cylinder surface of two different-diameters: bigger diameter outer cylinder surface 21 and than the outer cylinder surface 22 of minor diameter.An end face 23 than the surface of minor diameter of piston 16 contacts with hammer body 6 in impact process.Surface 21 links to each other by annulus 24 with 22.Aforesaid piston face 21 and 22 matches with corresponding surperficial 25,26 of hydraulic cylinder 15 respectively.Produce the cannelure 28 adjacent with the annulus 24 of piston on the surface 22 of piston 16, the chamber of this groove links to each other with discharge pipe line 11 via pipeline 29.22 places of matching, surface of the surface 26 of hydraulic cylinder and piston are provided with seal 30.
Buffering hydraulic cylinder 15 configurable lids 31 with different structure for example, are the form of the lid 32 that has inner chamber 33, perhaps are the form of the lid 34 that has the projection 35 that extend into buffering hydraulic cylinder 15 inside.
Hydraulic hammer according to the present invention is worked in the pattern that drives stake in the following manner.
The liquid that comes out from pump 9 is transported to along pipeline 14 chamber of transmission fluid cylinder pressure 7, and this chamber is positioned at following (also the claiming rod end chamber) of piston rod 8, thus the hammer body 6 that moves up piston rod 8 and be attached thereto.The liquid that is arranged in the chamber (also claiming plunger shaft) on the piston rod 8 of transmission fluid cylinder pressure 7 is extruded, and make it to flow in the discharge pipe line 11 through distributor 12 along pipeline 13.After hammer body 6 is elevated to predetermined altitude, these pressure distributor 12 commutations, pipeline 13 disconnects with discharge pipe line 11 and pipeline 13 is linked to each other with feed-line 10.As a result, the pressure in the plunger shaft increases to operating pressure.Hydraulic coupling with the product that equals the area difference between hydraulic fluid pressure and piston and the rod end chamber begins to act on piston rod 8 on the direction of hammer body 6.Under the effect of this hydraulic coupling and gravity, brake and stopped moving upward of hammer body 6, and begin to move downward, and quicken moving downward in the process under the effect of aforementioned power.
When arriving its initial positions, hammer body 6 just produced impact (by intermediate member-anvil piece) to stake 2, the result, and the kinetic energy of hammer body 6 is transformed into the merit that resistance exercise that stake 1 overcomes the earth is done.In impact process, pressure distributor 12 commutation disconnects being connected and being connected on the pipeline 11 of pipeline 13 and pipeline 10.Pressure in the plunger shaft descends and repeats this cyclic process.
In the pattern of extracting, hydraulic hammer is worked in the following manner.
mv
2/2＝(ΔV)
2/2V×E
Wherein: m is the weight of hammer body;
V is the speed of hammer body when impacting initial motion;
V is the volume in the buffering hydraulic cylinder medium;
Δ V is the value of elastic compression of the volume of medium;
E is the modulus of elasticity of the volume of medium.
In addition, the elastic energy of medium has played the resistance that overcomes the earth and has made the main body 2 of hammer and anchor clamps 5 effect of moving up of the stake 1 that is attached thereto, and the power that acts on the maximum on the main body 2 of hammer equals:
[ΔV/V×E]×[∑f]
Wherein, ∑ f is the larger-diameter cross sectional area sum of all pistons 16.
From then in the formula obviously as can be known, act on the area of power and the cross section of piston on main body 2 and the stake 1 and be directly proportional, and with buffering hydraulic cylinder in the volume of elastic fluid be inversely proportional to.Obviously, under any circumstance, the combination of these two parameters of front should be chosen to all to guarantee that the power that acts on hammer and the stake is optimum value.Compare with solution of the prior art, this is a major advantage of the present invention.
In addition, the rigidity of snubber of the present invention, perhaps in other words, the volume of buffering hydraulic cylinder medium can easily change on the basis of existing working hammer.As the substitute of lid 31, also can use the lid of changeable other form, for example have the lid 32 of inner chamber 33, it has increased the volume of medium and has reduced the active force that acts on the stake; Or having the lid 34 of projection 35, it has reduced the volume of medium and has increased the active force that acts on the stake.Like this, the important advantage of another of hydraulic hammer of the present invention is can change fast the rigidity of this snubber when extracting stake, and then, change the value that acts on the power on hammer and the stake.
It should further be appreciated that: cause power loss can ignore and rub less by leak of liquid in the hammer of the present invention.To be explained below.When buffering hydraulic cylinder was positioned at its initial position, if when the chamber of hydraulic cylinder 15 links to each other with discharge pipe line 11 or feed-line 10 respectively, the elastic fluid in the chamber of hydraulic cylinder 15 then can have the pressure of about 1MPa or 20-30Mpa.Pressure shown in being somebody's turn to do is pressed in the annulus 24 of piston 16 on the annulus 27 of hydraulic cylinder 15, thus the sealing at the place that matches between realization piston and the hydraulic cylinder.That is to say that in this case, piston 16 has played the function of a valve, hydraulic cylinder 15 is a seat, does not leak between them.In impact process, piston 16 has been broken the contact between the annulus 24 and 27 at hydraulic cylinder 15 internal motions.As a result, along the annular gap between the surface 25 of the surface 21 of piston 16 and hydraulic cylinder 15 leak of liquid has appearred.Yet in impact process, the leakage rate that is produced in the working time of collision that approximately 10ms is very little like this is negligible.
By the following low friction loss of situation explanation.Because the cooperation place between surface 21 and 25 does not have elastic sealing element, so the friction at this place is fluid friction.And the stroke of piston 16 is considerably less several millimeters.There is an elastic sealing element 30 cooperation place between surface 22 and 26, but is approximately 1Mpa (approximating the pressure of discharge pipe line 11) owing to act on the pressure of the medium on the seal, so it is little as can to ignore to rub.
Therefore, the invention provides the hammer that has the following advantages:
Thereby-be used in a masterpiece with optimal value and can weaken on hammer and the stake when extracting stake Impact, and finally increased the efficient of extracting the stake process, increased the reliability of hammer and used the longevity Life;
-can change fast the parameter that weakens impact, make in the limit of necessity change act on hammer and The size of the power on the stake becomes possibility, and has therefore enlarged the function of hammer.
Claims (4)
1. hydraulic hammer, it comprises: be provided with the tubular body (2) of upper flange (3) and lower flange (4), this main body is provided with anchor clamps (5), and these anchor clamps (5) are used for main body being connected to this stake (1) extracting under the pattern of stake; Be positioned at the hammer body (6) of body interior, this hammer body can move back and forth along main body (2); Be fixed to the transmission fluid cylinder pressure (7) on the upper flange, described transmission fluid cylinder pressure is provided with chamber; Be placed in the described chamber of described transmission fluid cylinder pressure and the piston rod (8) that links to each other with hammer body; The hydraulicdriven pump (9) that is used to hammer into shape, this pump are provided with feed-line (10) and discharge pipe line (11), and these two pipelines link to each other via the described chamber of pressure distributor (12) with described transmission fluid cylinder pressure (7); Be located at a plurality of snubbers of the upper flange (3) of main body, it is characterized in that: this hydraulic hammer is provided with two or more snubbers, they are made into the form of the buffering hydraulic cylinder (15) that has piston (16), the chamber of this buffering hydraulic cylinder (17) is filled with elastic fluid, described piston (16) is towards the side of hammer body, wherein, in extracting the pattern of described stake, the end face of described piston (16) can impact interaction constantly with hammer body.
2. hydraulic hammer as claimed in claim 1 is characterized in that, the chamber (17) of this buffering hydraulic cylinder (15) via flow direction towards the one way valve (20) of buffering hydraulic cylinder and be connected on feed-line (10) or the discharge pipe line (11).
3. hydraulic hammer as claimed in claim 1 or 2, it is characterized in that, each piston (16) of this buffering hydraulic cylinder (15) all has outer cylinder surface (22) and annulus (24) that connects them of two different-diameters, these two peripheries all match with corresponding two inner peripheries (26) of buffering hydraulic cylinder, and have a similar annulus that these two inner peripheries are coupled together, and than the piston face of minor diameter towards hammer body.
4. hydraulic hammer as claimed in claim 3, it is characterized in that, at next-door neighbour's annulus place, on the surface than minor diameter of each piston or cushion dashpot, formed cannelure (28), the chamber of this cannelure links to each other with discharge pipe line (11), the cooperation place of each piston and buffering hydraulic cylinder is provided with seal (30) from a side of cannelure, and is relative with annulus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021443947A CN100342089C (en) | 2002-09-04 | 2002-09-04 | Hydraulic hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021443947A CN100342089C (en) | 2002-09-04 | 2002-09-04 | Hydraulic hammer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1480594A CN1480594A (en) | 2004-03-10 |
| CN100342089C true CN100342089C (en) | 2007-10-10 |
Family
ID=34148478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021443947A Expired - Fee Related CN100342089C (en) | 2002-09-04 | 2002-09-04 | Hydraulic hammer |
Country Status (1)
| Country | Link |
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| CN (1) | CN100342089C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100360257C (en) * | 2006-01-06 | 2008-01-09 | 太原科技大学 | Control system for great flow of electrohydraulic hammer |
| CN107905229B (en) * | 2017-11-16 | 2019-09-24 | 浙江科技学院 | Reducing ground resonance influences the vibrohammer and pile sinking process of ambient enviroment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1763576A1 (en) * | 1990-06-05 | 1992-09-23 | Черкасский Филиал Киевского Политехнического Института Им.50-Летия Великой Октябрьской Социалистической Революции | Hydraulic hammer |
| CN2215516Y (en) * | 1994-05-21 | 1995-12-20 | 吉林工业大学 | Free falling impact type hydraulic hammer |
| CN1182154A (en) * | 1996-08-14 | 1998-05-20 | 俄罗斯专利技术内部股份公司 | Hydraulic hammer |
| CN1183498A (en) * | 1996-08-14 | 1998-06-03 | 俄罗斯专利技术内部股份公司 | Hydraulic hammer |
| CN2467577Y (en) * | 2001-03-28 | 2001-12-26 | 侯学志 | Three-purpose pile driver |
-
2002
- 2002-09-04 CN CNB021443947A patent/CN100342089C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1763576A1 (en) * | 1990-06-05 | 1992-09-23 | Черкасский Филиал Киевского Политехнического Института Им.50-Летия Великой Октябрьской Социалистической Революции | Hydraulic hammer |
| CN2215516Y (en) * | 1994-05-21 | 1995-12-20 | 吉林工业大学 | Free falling impact type hydraulic hammer |
| CN1182154A (en) * | 1996-08-14 | 1998-05-20 | 俄罗斯专利技术内部股份公司 | Hydraulic hammer |
| CN1183498A (en) * | 1996-08-14 | 1998-06-03 | 俄罗斯专利技术内部股份公司 | Hydraulic hammer |
| CN2467577Y (en) * | 2001-03-28 | 2001-12-26 | 侯学志 | Three-purpose pile driver |
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| Publication number | Publication date |
|---|---|
| CN1480594A (en) | 2004-03-10 |
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