CN110258560A - A kind of cylindrical diesel pile driver is driven piles mechanism for soft base - Google Patents
A kind of cylindrical diesel pile driver is driven piles mechanism for soft base Download PDFInfo
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- CN110258560A CN110258560A CN201910534832.4A CN201910534832A CN110258560A CN 110258560 A CN110258560 A CN 110258560A CN 201910534832 A CN201910534832 A CN 201910534832A CN 110258560 A CN110258560 A CN 110258560A
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- back pressure
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- 230000007246 mechanism Effects 0.000 title claims abstract description 18
- 238000005303 weighing Methods 0.000 claims description 12
- 238000012856 packing Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 7
- 238000007906 compression Methods 0.000 abstract description 7
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 14
- 239000002283 diesel fuel Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- E02D7/12—Drivers with explosion chambers
- E02D7/125—Diesel drivers
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Actuator (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention relates to pile driving equipment technical fields, and it discloses a kind of cylindrical diesel pile driver and drives piles mechanism for soft base, lower piston including lower cylinder body, in lower cylinder body, the side bottom of lower cylinder body and be located at lower piston lower section be equipped with bogey, the support device for being used for holding in the palm lower piston is equipped in bogey, the end of bogey is respectively equipped with the balance tube for being connected to lower cylinder body inner cavity and back pressure pipe with top, balance tube is located at the top of back pressure pipe, and balance tube is for importing the gas for pushing support device to skid off into bogey.The present invention passes through setting bogey and support device, and control the stretching and retraction of support device respectively by balance tube and back pressure pipe, support device is enabled to shore lower piston during upper piston downlink, prevent lower piston from pressing to tup pedestal, it can smoothly be withdrawn from before the compression ignition stage simultaneously and shore effect, ensure that lower piston smoothly hammers pedestal, so that the piling machine efficiently and can be used safely in soft base.
Description
Technical field
The present invention relates to pile driving equipment technical field, specially a kind of cylindrical diesel pile driver is for soft base piling mechanism.
Background technique
Cylindrical diesel pile driver is made of straight tube cylinder body, upper piston, lower piston, pile cover, stake seat etc., and the course of work is similar
In a horizontal bar two-stroke diesel engine, specifically: straight tube cylinder body is divided into cylinder up and down, and upper and lower piston is located at cylinder up and down
Interior, when operation, free-falling is sling by undercarriage and discharged to upper piston, when upper piston falls by suction and exhaust ports, upper piston
Start to compress the air in lower cylinder, meanwhile, upper piston touches oil pump and manipulates briquetting, and injection pump is in a very short period of time
To cylinder injection atomized diesel fuel, continue air in compression cylinder, the air pressure being gradually increased closely presses lower piston and pile cover
On pile crown, when air compression generation high temperature and pressure reaches diesel-fuel ignition point in cylinder, mist of oil is ignited explosion in cylinder, is produced
Raw explosive force continues down to beat stake, and pops up upper piston, and when piston stroking upward is to when crossing suction and exhaust ports, exhaust gas is arranged
In outside cylinder, because inertia continues to uplink, fresh air is inhaled into upper piston, when upper piston downlink again, fresh air in cylinder
A part is scanned out to outside cylinder, until piston downlink crosses suction and exhaust ports, that is, completes a working cycles.
By above-mentioned working principle it is found that because diesel hammer starts by compression ignition diesel oil, it is therefore necessary to guarantee in cylinder
Confining gas reaches certain compression ratio, and when carrying out piling work to soft base, since Soft Soil is supplied to the anti-of lower piston
Active force is too small, causes gas in the jar decrement inadequate, detonation diesel oil ignited in cylinder can not be needed repeatedly to sling hammer with suspension hook
Head, which breaks off relations, to be impacted, and operating efficiency is seriously affected, and lifting suspension hook falls every time, and the diesel oil amount that do not ignite in cylinder can all be made to increase
More, the power generated for subsequent ignition diesel oil is uncontrollable, and there are security risks, and excessive diesel oil will cause burning and not fill
Divide, waste of resource, influence the problem of diesel oil cylinder normal use, for this purpose, proposing a kind of tubular diesel suitable for soft base piling work
Piling hammer mechanism, it is intended to solve technical problem set forth above.
Summary of the invention
For the existing cylindrical diesel pile driver proposed in background technique deficiency present in soft base environment use process,
The present invention provides a kind of cylindrical diesel pile drivers for soft base piling mechanism, and have high-efficient homework, safety to be in soft base
The high advantage of number, solves technical problem mentioned above in the background art.
The invention provides the following technical scheme: a kind of cylindrical diesel pile driver for soft base drive piles mechanism, including lower cylinder body,
Upper piston and lower piston in lower cylinder body, the side bottom of the lower cylinder body and the lower section for being located at lower piston are equipped with carrying dress
It sets, the support device for being used for holding in the palm lower piston is equipped in the bogey, the end and top of the bogey are set respectively
Have the balance tube and back pressure pipe of connection lower cylinder body inner cavity, the balance tube is located at the top of back pressure pipe, the balance tube for
The gas for pushing support device to skid off is imported in bogey, the back pressure pipe, which is used to import into bogey, pushes support dress
Set the gas of slide-in, between the balance tube and back pressure pipe and be located at lower cylinder body outer wall be equipped with stroke contact switch, described time
The outside of pressure pipe is equipped with solenoid valve, and the stroke contact switch is used to control the opening and closing of solenoid valve.
Preferably, the bogey includes bearing tube, stop collar and piston packing ring, and the bearing tube is installed on lower cylinder
The side bottom of body and the inner cavity for being connected to lower cylinder body, stop collar and piston packing ring is fixedly mounted in the inner wall of the bearing tube, described
One end of the outer end connection balance tube of bearing tube, top connection of the bearing tube between stop collar and piston packing ring
One end of back pressure pipe.
Preferably, support device include power piston, push rod, support tube, mandril and weighing apparatus pressure gas channel, the power piston
Side is fixedly connected on one end of push rod, and the other end of the push rod is fixedly connected on the side of support tube, the support tube with
Mandril forms piston and is socketed, and the inner cavity of the push rod and bogey forms piston socket, passes through in the power piston and push rod
The inner cavity that the inner cavity of support tube is connected to bogey by the weighing apparatus pressure gas channel set is opened up, the support tube and mandril can protrude into lower cylinder
Shore in vivo and by mandril the bottom of lower piston.
Preferably, the interior bottom of the support tube is equipped with raised cushion block, and the protrusion cushion block, which is used to pave mandril to weighing apparatus, presses
The port position of gas circuit.
Preferably, the stroke contact switch is placed in the port for leaving balance tube when upper piston moves down completely just.
Preferably, three bogeys of the peripheral annular array of the lower cylinder body, support device, balance tube, back pressure pipe, row
Journey contact switch and solenoid valve block at mechanism.
The present invention have it is following the utility model has the advantages that
1, the present invention is by setting bogey and support device, and controls support device respectively by balance tube and back pressure pipe
Stretching and retraction, enable support device to shore lower piston during upper piston downlink, prevent lower piston to tup pedestal
Pressure, while can smoothly be withdrawn from before the compression ignition stage and shore effect, ensure that lower piston smoothly hammers pedestal, so as to
Enable the piling machine efficient in soft base and uses safely.
2, the present invention by balance tube, bearing tube, weighing apparatus pressure gas channel by the pressure communication in air pressure in support tube and lower cylinder body,
Partial action power when to shore mandril to lower piston is undertaken by lower cylinder body inner equilibrium air pressure, so that it is steady to shore better effect
It is fixed.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is partial enlargement structural representation in Fig. 1 of the present invention；
Fig. 3 is that mandril of the present invention shores lower piston status diagram completely；
Fig. 4 is that mandril of the present invention is entirely retracted to status diagram in support tube；
Fig. 5 is that support tube of the present invention is entirely retracted to status diagram in bearing tube.
In figure: 1, lower cylinder body；2, upper piston；3, lower piston；4, bogey；41, bearing tube；42, stop collar；43, living
Fill in sealing ring；5, support device；5a, power piston；5b, push rod；5c, support tube；5d, mandril；5e, weighing apparatus pressure gas channel；6, weighing apparatus pressure
Pipe；7, back pressure pipe；8, stroke contact switch；9, solenoid valve.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1-5, a kind of cylindrical diesel pile driver is driven piles mechanism for soft base, including lower cylinder body 1, is set to lower cylinder body
Upper piston 2 and lower piston 3 in 1, the side bottom in lower cylinder body 1 and the lower section positioned at lower piston 3 are equipped with bogey 4, carrying
It is equipped with the support device 5 for be used for support lower piston 3 in device 4, and in the case where the end of bogey 4 is respectively equipped with top and to be connected to
The balance tube 6 and back pressure pipe 7 of 1 inner cavity of cylinder body, balance tube 6 are located at the top of back pressure pipe 7, and balance tube 6 is used for into bogey 4
The gas for pushing support device 5 to skid off is imported, back pressure pipe 7 is for importing the gas for pushing support device 5 to slide into bogey 4
Body, the outer wall between balance tube 6 and back pressure pipe 7 and positioned at lower cylinder body 1 is equipped with stroke contact switch 8, in the outside of back pressure pipe 7
Equipped with solenoid valve 9, stroke contact switch 8 is used to control the opening and closing of solenoid valve 9.
Specifically, bogey 4 includes bearing tube 41, stop collar 42 and piston packing ring 43, and bearing tube 41 is installed on down
The side bottom of cylinder body 1 and the inner cavity for being connected to lower cylinder body 1, the outer end of bearing tube 41 is using the end cap sealing being threadedly coupled, carrying
Stop collar 42 and piston packing ring 43 is fixedly mounted in the inner wall of cylinder 41, and one end of the outer end connection balance tube 6 of bearing tube 41 is held
Carry one end of top connection back pressure pipe 7 of the cylinder 41 between stop collar 42 and piston packing ring 43.
Specifically, support device 5 includes power piston 5a, push rod 5b, support tube 5c, mandril 5d and weighing apparatus pressure gas channel 5e, is moved
The side of power piston 5a is fixedly connected on one end of push rod 5b, and the other end of push rod 5b is fixedly connected on the side of support tube 5c,
Support tube 5c and mandril 5d forms piston socket, will be supported by penetrating through the weighing apparatus pressure gas channel 5e opened up in power piston 5a and push rod 5b
Cylinder 5c inner cavity be connected to 41 inner cavity of bearing tube, wherein power piston 5a be located between 41 end cap of stop collar 42 and bearing tube and
It is slided in bearing tube 41 with movement, push rod 5b is slidably socketed in stop collar 42 and piston packing ring 43, and being capable of band
Dynamic support tube 5c is protruded into lower cylinder body 1, and piston packing ring 43 and push rod 5b formation are slidingly sealed structure, and stop collar 42 is to limit
The further sliding of position power piston 5a, fully slides out in bearing tube 41 to avoid support tube 5c.
Wherein, to be normally carried out inflation, the interior bottom of support tube 5c need to be equipped with raised cushion block, which is used for will
Mandril 5d is paved, and when entering support tube 5c with the gas for guaranteeing that weighing apparatus pressure gas channel 5e comes, can be entered by the bottom end of mandril 5d, thus
Smoothly hold up mandril 5d.
Wherein, unstable factor is generated to prevent support tube 5c from fully sliding out bearing tube 41, by the position of stop collar 42
It is no more than the width of support tube 5c set on limitation power piston 5a sliding maximum distance.
To make support tube 5c and push rod 5b have enough rigidity, the wall panel thickness of support tube 5c is needed to be at least
6mm。
To make the end of bearing tube 41 not influence the recycling of the whereabouts mandril 5d, it is contemplated that by the fully extended support tube of mandril 5d
The height of 5c controls in the profile height of bearing tube 41.
It, need to be in three bogeys 4 of peripheral annular array of lower cylinder body 1, support device 5, balance tube to play rest balance
6, the mechanism that back pressure pipe 7, stroke contact switch 8 and solenoid valve 9 form.
To make mechanism run well, stroke contact switch 8 need to be placed in when upper piston 2 moves down and leave balance tube completely just
6 port, i.e. upper piston 2 are displaced downwardly to when the port of balance tube 6 is left on just its top and trigger stroke contact switch 8, to beat
Open electromagnetic valve 9.
Application method of the invention is as follows:
2 downlink process of upper piston is to this section of process of the top of balance tube 6, and gas part is entered by balance tube 6 in lower cylinder body 1
In bearing tube 41, and entered in support tube 5c by the pressure gas channel 5e that weighs, before support tube 5c does not also stretch out bearing tube 41, mandril 5d
The upper inner wall for holding out against bearing tube 41, when power piston 5a is pushed into stop collar 42 by gas pressure to be contacted, support tube 5c stretching is held
Carry in cylinder 41, meanwhile, lower piston 3 is withstood, continues traveling downwardly upper piston 2 at this time by mandril 5d ejection, upper piston 2 and lower piston 3 it
Between atmospheric pressure increase, while 41 inner air pressure of bearing tube also increases, so it is motionless to hold out against lower piston 3 by mandril 5d, to protect
Tup pedestal will not be pushed by having hindered lower piston 3, this process is equilibrium stage；
Upper piston 2, which continues traveling downwardly, leaves balance tube 6, and touches stroke contact switch 8, opens solenoid valve 9, at this point, carrying
In device 4 air pressure by balance tube 6 and 2 top atmospheric pressure of upper piston close to balance, mandril 5d because gravity is fallen into support tube 5c,
Air pressure between upper piston 2 and lower piston 3 is entered in bearing tube 41 by back pressure pipe 7, and power piston 5a is inversely pushed, and is driven
Support tube 5c enters in stop collar 42, this process is recovery stage；
Upper piston 2 touches stroke contact switch 8 and continues traveling downwardly segment after, blocks back pressure pipe 7, upper piston 2 and lower work
Gas between plug 3 reaches the decrement of diesel pilot, ignites diesel oil, impacts to lower piston 3.
It is described by above-mentioned process, the setting of bogey 4, support device 5, balance tube 6 and back pressure pipe 7 of the present invention can
So that the stage gas compression in lower cylinder body 1 of upper piston 2 will not be right by lower piston 3 by 5 jacking lower piston 3 of support device
Soft base pressure, so as to effectively implement soft base piling work, without repeatedly lifting by crane sash weight, mentions to solve background technique
Technological difficulties out.On the other hand, by jacking pressure in air pressure balance bogey 4 in the cylinder during downlink, so that
Have enough support forces when mandril 5d jacking lower piston 3.Meanwhile stroke contact switch 8 is set to balance tube 6 and back pressure pipe 7
Between, it may make upper piston 2 first to leave the port of balance tube 6 before opening solenoid valve 9, so that mandril 5d can be sometimes
Between unload and enter in support tube 5c, the normal operation of support organization from the state of shoring.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of cylindrical diesel pile driver is for soft base piling mechanism, including lower cylinder body (1), the upper work being set in lower cylinder body (1)
Fill in (2) and lower piston (3), it is characterised in that: the side bottom of the lower cylinder body (1) and be located at the lower section of lower piston (3) equipped with holding
It carries and sets (4), the support device (5) for being used for holding in the palm lower piston (3), the bogey (4) are equipped in the bogey (4)
End the balance tube (6) and back pressure pipe (7) for being connected to lower cylinder body (1) inner cavity are respectively equipped with top, the balance tube (6) is located at
The top of back pressure pipe (7), the balance tube (6) are used to import the gas for pushing support device (5) to skid off into bogey (4)
Body, the back pressure pipe (7) are used to import the gas for pushing support device (5) to slide into, the balance tube into bogey (4)
(6) outer wall between back pressure pipe (7) and positioned at lower cylinder body (1) is equipped with stroke contact switch (8), outside the back pressure pipe (7)
Portion is equipped with solenoid valve (9), and the stroke contact switch (8) is used to control the opening and closing of solenoid valve (9).
2. a kind of cylindrical diesel pile driver according to claim 1 is for soft base piling mechanism, it is characterised in that: described to hold
Carrying and setting (4) includes bearing tube (41), stop collar (42) and piston packing ring (43), and the bearing tube (41) is installed on lower cylinder body
(1) stop collar (42) and piston is fixedly mounted in the inner cavity of side bottom and connection lower cylinder body (1), the inner wall of the bearing tube (41)
Sealing ring (43), one end of outer end connection balance tube (6) of the bearing tube (41), the bearing tube (41) are located at stop collar
(42) one end of top connection back pressure pipe (7) between piston packing ring (43).
3. a kind of cylindrical diesel pile driver according to claim 1 is for soft base piling mechanism, it is characterised in that: support dress
Setting (5) includes power piston (5a), push rod (5b), support tube (5c), mandril (5d) and weighing apparatus pressure gas channel (5e), the power piston
The side of (5a) is fixedly connected on one end of push rod (5b), and the other end of the push rod (5b) is fixedly connected on support tube (5c)
Side, the support tube (5c) and mandril (5d) form piston socket, and the push rod (5b) and the inner cavity of bogey (4) are formed
Piston socket penetrates through the weighing apparatus pressure gas channel (5e) that opens up in the power piston (5a) and push rod (5b) for the inner cavity of support tube (5c)
It is connected to the inner cavity of bogey (4), the support tube (5c) and mandril (5d) can protrude into lower cylinder body (1) and by mandril (5d)
Shore the bottom of lower piston (3).
4. a kind of cylindrical diesel pile driver according to claim 3 is for soft base piling mechanism, it is characterised in that: the branch
The interior bottom for supportting cylinder (5c) is equipped with raised cushion block, and the protrusion cushion block is used to pave mandril (5d) to the port of weighing apparatus pressure gas channel (5e)
Position.
5. a kind of cylindrical diesel pile driver according to claim 1 is for soft base piling mechanism, it is characterised in that: the row
Journey contact switch (8) is placed in the port for leaving balance tube (6) when upper piston (2) moves down completely just.
6. a kind of cylindrical diesel pile driver according to claim 1 is for soft base piling mechanism, it is characterised in that: under described
Three bogeys (4) of peripheral annular array of cylinder body (1), support device (5), balance tube (6), back pressure pipe (7), stroke contact
Switch the mechanism of (8) and solenoid valve (9) composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910534832.4A CN110258560B (en) | 2019-06-20 | 2019-06-20 | A cylinder diesel pile driver for soft base pile driving operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910534832.4A CN110258560B (en) | 2019-06-20 | 2019-06-20 | A cylinder diesel pile driver for soft base pile driving operation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110258560A true CN110258560A (en) | 2019-09-20 |
| CN110258560B CN110258560B (en) | 2020-12-11 |
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ID=67919582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910534832.4A Active CN110258560B (en) | 2019-06-20 | 2019-06-20 | A cylinder diesel pile driver for soft base pile driving operation |
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| Country | Link |
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| CN (1) | CN110258560B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62228524A (en) * | 1985-12-23 | 1987-10-07 | ゲ−プルダ− リンデンマイヤ− ゲゼルシヤフト ミツト ベシユレンクテル ハフツング ウント コンパニ− | Diesel ram |
| CN101182714A (en) * | 2007-11-26 | 2008-05-21 | 江苏东达工程机械股份有限公司 | High efficiency diesel pile hammer and gas piston structure thereof |
| US7392855B1 (en) * | 2005-04-27 | 2008-07-01 | American Piledriving Equipment, Inc. | Vibratory pile driving systems and methods |
| CN207143945U (en) * | 2017-07-29 | 2018-03-27 | 江苏巨威机械有限公司 | Cartridge type grows nested diesel pile hammer |
-
2019
- 2019-06-20 CN CN201910534832.4A patent/CN110258560B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62228524A (en) * | 1985-12-23 | 1987-10-07 | ゲ−プルダ− リンデンマイヤ− ゲゼルシヤフト ミツト ベシユレンクテル ハフツング ウント コンパニ− | Diesel ram |
| US7392855B1 (en) * | 2005-04-27 | 2008-07-01 | American Piledriving Equipment, Inc. | Vibratory pile driving systems and methods |
| CN101182714A (en) * | 2007-11-26 | 2008-05-21 | 江苏东达工程机械股份有限公司 | High efficiency diesel pile hammer and gas piston structure thereof |
| CN207143945U (en) * | 2017-07-29 | 2018-03-27 | 江苏巨威机械有限公司 | Cartridge type grows nested diesel pile hammer |
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| Publication number | Publication date |
|---|---|
| CN110258560B (en) | 2020-12-11 |
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Effective date of registration: 20201120 Address after: Room 306, No.15, Dingya lane, Shangcheng District, Hangzhou City, Zhejiang Province Applicant after: Hangzhou Yuzhen Intelligent Technology Co., Ltd Address before: No. 202, No. 11 Building 2, Pinglu Cultural District, Liuzhou District, 545000 Guangxi Zhuang Autonomous Region Applicant before: Liu Yong |
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