CN110485419B - Hydraulic pile driving hammer - Google Patents
Hydraulic pile driving hammer Download PDFInfo
- Publication number
- CN110485419B CN110485419B CN201910814842.3A CN201910814842A CN110485419B CN 110485419 B CN110485419 B CN 110485419B CN 201910814842 A CN201910814842 A CN 201910814842A CN 110485419 B CN110485419 B CN 110485419B
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- hammer
- pile
- hammer core
- core
- hydraulic
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- 238000003825 pressing Methods 0.000 claims abstract description 41
- 238000006073 displacement reaction Methods 0.000 claims abstract description 29
- 230000006835 compression Effects 0.000 claims abstract description 13
- 238000007906 compression Methods 0.000 claims abstract description 13
- 238000010276 construction Methods 0.000 claims description 20
- 238000005192 partition Methods 0.000 claims description 13
- 210000001503 joint Anatomy 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 230000035939 shock Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 210000004907 gland Anatomy 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 230000000295 complement effect Effects 0.000 claims description 5
- 238000005056 compaction Methods 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 230000001595 contractor effect Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 2
- 230000036316 preload Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 description 20
- 238000005299 abrasion Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000009414 blockwork Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E02D7/08—Drop drivers with free-falling hammer
-
- 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
- E02D7/14—Components for drivers inasmuch as not specially for a specific driver construction
-
- 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
- E02D7/14—Components for drivers inasmuch as not specially for a specific driver construction
- E02D7/16—Scaffolds or supports for drivers
- E02D7/165—Scaffolds or supports for drivers of variable length, e.g. foldable or telescopic
Landscapes
- 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)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
A hydraulic pile hammer comprises a hammer core unit, a hammer shell, a pile cap group, a lifting oil cylinder, a connecting shaft assembly, a landing gear, an energy accumulator unit, a pile cap group, a displacement sensor and a hydraulic system; the hammer core unit is fixedly integrated through a fastening pull rod; a cylinder barrel end cover of the lifting cylinder is hinged on the connecting bracket, and a connecting shaft assembly is arranged on a piston rod at the lower part of the cylinder barrel end cover; the pressing sleeve component is arranged in the central blind hole of the hammer core unit, the shaft shoulder on the shaft body is tightly clung to the pressing seat, and the positioning ring fixedly installs the pressing sleeve component on the hammer core unit; an upper buffer cushion and a lower buffer cushion of the shaft body are respectively arranged between the upper shaft shoulder of the shaft body and the compression seat and below the lower shaft shoulder of the shaft body; four inner corners of the inner cavity of the lower shell frame body of the hammer shell are provided with guide plates; the pile cap group is fixedly arranged below the hammer shell, the multi-layer rubber pad is positioned above the inner ring of the upper cap flange, and the impact block is contacted with the bottom plane of the impact head; the invention has the characteristics of good integral rigidity, low hammer body height, convenient guide plate replacement and the like, improves the safety performance of pile driving operation and improves the pile driving operation efficiency.
Description
Technical Field
The invention relates to pile foundation construction machinery, in particular to a hydraulic pile hammer.
Background
With the continuous advancement of urban industry and civil architecture, municipal construction, bridges, wharfs, inter-city railways and urban construction, the traditional diesel pile hammer cannot meet the low-carbon, energy-saving and green environment-friendly requirements advocated by modern foundation construction due to the fact that the traditional diesel pile hammer is influenced by the factors of oil smoke emission, high noise, large vibration, low operation efficiency and the like, and the application range and the application area of the traditional diesel pile hammer are greatly limited. The hydraulic pile hammer has the technical characteristics of high operation efficiency, low noise, small vibration, no oil smoke pollution and the like, meets the low-carbon and energy-saving environment-friendly requirements, gradually replaces the traditional diesel pile hammer, continuously expands the product specification series, and continuously perfects and improves the product performance.
The working principle of the hydraulic pile hammer is that the hammer core is quickly released after being lifted to the expected height by the lifting oil cylinder, directly acts on a pile cap anvil block connected below the hydraulic hammer in a mode of being larger than or approaching to free falling, and the pile body is beaten into a stratum after the anvil block works on a precast pile body sleeved in the pile cap. Because the acting force of the hydraulic hammer core to the anvil is very large, the stay transfer time is only about 0.1-0.15 seconds, if the vibration is large after the hydraulic hammer core impacts the anvil, the hydraulic hammer body is greatly damaged and destroyed by generating great impact force on the hammer body and the pile cap, the normal play of the working performance of the hydraulic hammer is influenced, and the service life of the hydraulic hammer is reduced; the pile head of the precast pile is greatly damaged by the larger impact force, so that the pile head is damaged, and the construction quality of the pile foundation is affected.
The existing hydraulic pile hammer comprises a frame body and an impact hammer core arranged in the frame body, wherein a hydraulic power system is connected with a hydraulic pump, a hydraulic pipeline, an energy accumulator, various control valve elements and a lifting oil cylinder, the lifting oil cylinder is positioned in the inner cavity of the frame body, an upper end cylinder barrel is connected with the upper end of the frame body, a piston rod of the lifting oil cylinder is connected with the impact hammer core, and the impact hammer core is used for striking the pile body. The cross sections of the impact hammer core and the frame body of the hydraulic impact hammer generally adopt squares with four corners removed, and the impact hammer core is arranged in the inner cavity of the frame body and then moves up and down along the vertical direction; the guide plates are arranged on the two side surfaces of the four notches along the vertical direction of the impact hammer core, the convex guide frames are arranged at the four inner corners of the frame body, the impact hammer core is ensured to be lifted and fall stably and reliably in the inner cavity of the frame body, the frame body and the impact hammer core are complex to process by adopting the structural mode, and the manufacturing cost of the hydraulic hammer is increased. When the hydraulic hammer pile sinking construction is carried out, because the impact hammer core reciprocates up and down in the inner cavity of the frame body of the hydraulic hammer, the abrasion of the guide plate is faster, a user needs to check the abrasion degree of the guide plate regularly, if the guide plate exceeds the abrasion limit, the guide plate needs to be detached and replaced, and because the guide plate is arranged on the impact hammer core, the whole impact hammer core needs to be detached from the inner cavity of the frame body and then the abrasion guide plate is replaced, the operator wastes time and energy, the replacement is difficult, the pile sinking construction efficiency of the hydraulic hammer is seriously affected, and the construction operation cost is increased. At present, the pile cap connected below the hydraulic hammer frame body is provided with a buffer ring on the impact plane in the pile cap body, the buffer ring has the effect of isolating the impact of the pile cap rebound on the outer shell body of the hydraulic hammer and improving the vibration-proof effect of the hydraulic hammer. In addition, the lifting cylinder of the hydraulic pile hammer generally moves at a position above the impact hammer core, and the stroke of the piston rod directly influences the height dimension of the hydraulic hammer, so that the overall length of the hydraulic pile hammer is increased, and adverse effects are brought to pile frame selection. Therefore, the technical problem that technical personnel need to solve and overcome is how to reduce the running resistance in the piling process of the hydraulic hammer, reduce the vibration impact in the construction process of the hydraulic hammer, facilitate the maintenance and replacement of the guide plate, reduce the overall height of the hydraulic hammer, thereby prolonging the service life, improving the running safety and the pile foundation construction efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the hydraulic pile hammer which has good overall rigidity, impact resistance and convenient guide plate replacement, effectively isolates the impact of pile cap rebound on a hammer body, effectively reduces the overall height, further improves the safety performance of pile driving operation, improves the pile driving operation efficiency and reduces the engineering cost of a construction unit.
In order to achieve the above object, the solution adopted by the present invention is:
The utility model provides a hydraulic pile hammer, includes hammer core unit, hammer casing, lift cylinder, connecting axle assembly, undercarriage, a plurality of energy storage ware unit, pile cap group, a set of displacement sensor of top, a set of displacement sensor and the hydraulic system of below that contain lower hammer core and last hammer core, wherein:
The lower hammer core of the hammer core unit comprises a lower hammer core upper part with a central counter bore, an upper boss and a plurality of air holes, an impact head, an upper hammer core with a central through hole and a lower pit, a buffer block positioned on the upper end surface of the upper hammer core, a plurality of fastening pull rods with double-head threads for connecting the lower hammer core and the upper hammer core into a whole, a plurality of locking holes positioned on the side surface of the lower hammer core, a plurality of pull rod locking shafts with pull rod screw holes and locking screw holes, and a plurality of elastic pin sleeves positioned between the lower hammer core and the upper hammer core;
The hammer casing includes the last casing framework of linking bridge and a plurality of upper cover through-hole, has lower shell framework of lower part flange, is located the baffle that has the hydro-cylinder through-hole between last casing framework and the lower shell framework, two sets of back deflector and is located a plurality of deflector of four interior angles departments in lower shell framework inner chamber, wherein: the connecting bracket comprises a bracket vertical plate, a bracket shaft, a joint bearing and a shaft end nut;
the lifting oil cylinder comprises a piston rod with end threads, a cylinder barrel end cover with a fork, a cylinder barrel and a valve block group positioned at the upper part of the outer wall of the cylinder barrel;
The connecting shaft assembly comprises a connecting shaft body with an upper shaft shoulder of the shaft body and a lower shaft shoulder of the shaft body, a butt joint disc, an upper shaft body buffer cushion, a lower shaft body buffer cushion, a compression sleeve assembly and a positioning ring, wherein: the pressing sleeve assembly comprises a pressing upper flange, a central ring and a pressing seat with a plurality of overflow holes;
the landing gear comprises a lifting pulley block, a lifting hammer hook and a back guide block;
each energy accumulator unit comprises an energy accumulator, a gland, a shock pad and an upper end cover;
The pile cap group comprises an upper pile cap, a lower pile cap and an impact block, wherein the upper pile cap comprises an upper cap flange, an inner ring and a plurality of layers of rubber pads, and the impact block is positioned at a pit on the end face of the lower pile cap;
The method is characterized in that:
the upper hammer core of the hammer core unit is in a cuboid shape, and the four buffer blocks are arranged on the upper end surface of the upper hammer core in a geometric symmetry mode; eight pull rod through holes which are parallel to each other along the vertical direction and have a geometrically symmetrical mode in the cross section of the upper hammer core are formed in the upper hammer core, the upper part of the lower hammer core is cuboid, and eight pull rod blind holes which are parallel to each other along the vertical direction and have a geometrically symmetrical mode in the cross section of the lower hammer core are formed in the lower hammer core; projections of the eight pull rod through holes of the upper hammer core and the eight pull rod blind holes of the lower hammer core in the vertical direction of the hammer core unit are overlapped and complementary; the upper hammer core is arranged on an upper boss of the upper end surface of the upper part of the lower hammer core through a lower pit of the lower end surface of the upper hammer core; projections of upper hammer core of the hammer core unit and projection of upper part of lower hammer core of the lower hammer core in vertical direction of the hammer core unit are overlapped and complemented; eight locking holes are symmetrically arranged on four sides of the lower hammer core along the horizontal direction of the upper part of the lower hammer core and are vertically communicated with eight pull rod blind holes; eight pull rod locking shafts are respectively arranged in each locking hole at the upper part of the lower hammer core; eight fastening pull rods respectively penetrate through the pull rod through holes of the upper hammer core and then enter the pull rod blind holes at the upper part of the lower hammer core, the lower end threads of the eight fastening pull rods are respectively fastened to the pull rod screw holes of the pull rod locking shafts and then are fixed after screws are screwed into the locking screw holes of the pull rod locking shafts, and the upper end threads of the eight fastening pull rods are fastened by nuts after the upper end threads of the eight fastening pull rods are exposed out of the upper end face of the upper hammer core of the hammer core unit; the four air holes are symmetrically arranged on the four side surfaces of the lower hammer core along the horizontal direction of the upper part of the lower hammer core and are vertically communicated with the bottom of the center counter bore;
An upper shell frame of the hammer shell is connected with a lower shell frame through a partition plate into a whole to form a cuboid welding structure; the four energy accumulator units are symmetrically arranged at the positions close to the four inner corners of the inner cavity of the upper shell frame along the vertical direction of the upper shell frame, and each energy accumulator unit is fixed on the partition plate through the bottom of each energy accumulator and then is sequentially provided with a gland, a shock pad and an upper end cover for fixing;
The hammer core unit is arranged in the inner cavity of the lower shell frame body of the hammer shell, and the plurality of guide plates are arranged on two sides of four inner angles of the inner cavity of the lower shell frame body along the vertical direction of the lower shell frame body;
the lifting oil cylinder passes through an oil cylinder through hole of a baffle plate of the hammer shell through a cylinder barrel, a fork of a cylinder barrel end cover at the upper part of the lifting oil cylinder is arranged between two bracket vertical plates of the connecting bracket after being assembled into the joint bearing, and a bracket shaft sequentially passes through one bracket vertical plate of the connecting bracket, the fork of the cylinder barrel end cover and a mounting hole of the other bracket vertical plate of the connecting bracket and is fixed by a shaft end nut; the end thread of the piston rod of the lifting oil cylinder is fixedly provided with a butt joint disc of the connecting shaft assembly;
The upper shaft shoulder of the shaft body of the connecting shaft assembly is in butt joint with the butt joint disc through a screw and is arranged in the compression seat of the compression sleeve assembly; the upper buffer cushion of the shaft body is arranged between the compression seat and the lower shaft shoulder of the shaft body after being split, the lower shaft shoulder of the shaft body is arranged in the center counter bore at the upper part of the lower hammer core, and the lower buffer cushion of the shaft body is arranged between the lower shaft shoulder of the shaft body and the bottom of the center counter bore; the pressing sleeve assembly is arranged in a central through hole of an upper hammer core of the hammer core unit after being cut along the axial direction of the pressing sleeve assembly, a pressing seat at the lower end of the pressing sleeve assembly is tightly attached to a step in a central counter bore at the upper part of the lower hammer core, a central ring of the pressing sleeve assembly is arranged on the inner wall of the central through hole of the upper hammer core, and a pressing upper flange at the upper end of the pressing sleeve assembly is sleeved with a positioning ring and then is fixed on the hammer core unit through a plurality of pressing bolts; the plurality of overflow holes of the pressing seat are communicated with the plurality of ventilation holes through gaps between the lower shaft shoulder of the shaft body and the central counter bore at the upper part of the lower hammer core;
The landing gear is arranged on a column guide rail of a pile frame from the outside through a back guide block of the landing gear, and a steel wire rope led out by a winch of the outer pile frame passes through a lifting pulley block of the landing gear after passing through a top pulley block of the pile frame and then is connected with the landing gear; the lifting hammer hook of the landing gear hooks the hammer shell, the winch of the pile frame is controlled to retract the steel wire rope, the hammer shell moves upwards along the upright post guide rail of the pile frame by virtue of the two groups of back guide plates until a precast pile from the outside is pulled to completely enter the lower pile cap of the pile cap group, and the steel wire rope of the winch is controlled to enable the hammer shell and the precast pile to move downwards to a stop position together, so that the lifting hammer hook of the landing gear is controlled to be separated from the hammer shell;
The pile cap group is fixedly arranged on the lower flange of the lower shell frame body through an upper cap flange of the upper pile cap, and the multi-layer rubber gasket is arranged above an inner ring of the upper cap flange in a mode of being higher than the upper end surface of the upper cap flange and has a certain pretightening force after being fastened by screws; the lower pile cap is sleeved in the hole of the upper pile cap, and the upper end surface of the impact block is contacted with the bottom plane of the impact head of the hammer core unit; the lower pile cap is sleeved on the pile head of the prestressed pile or the tubular pile from the outside;
The four energy accumulator units are arranged on the partition boards at the four inner corners of the inner cavity of the upper shell body along the vertical direction of the hammer shell body, each energy accumulator, each gland and each shock pad are sequentially arranged on the upper end surface of the partition board, and are fixedly arranged on the upper end surface of the hammer shell body through each upper end cover; the energy accumulator unit is connected with the hydraulic control system through a pipeline;
The upper group of displacement sensors and the lower group of displacement sensors are arranged up and down along the vertical direction of the hammer shell, each group of displacement sensors is two, and each displacement sensor is symmetrically arranged on the left side surface and the right side surface of the lower shell frame; the upper group of displacement sensors monitor the uplink limit position of the hammer core unit, and when the upper end face of the hammer core unit reaches the position, signals are transmitted to the hydraulic control system, so that the hydraulic pile hammer can stop running in time; the lower group of displacement sensors detect the up-down operation of the hammer core unit, signals are transmitted to the hydraulic control system, and the hydraulic control part of the valve block group timely converts the stretching and contracting actions of the lifting oil cylinder, so that the hammer core unit can complete lifting and hammering operation in one working cycle;
The hydraulic control system is connected with a plurality of energy accumulator units through hydraulic pipelines and a valve block group at the upper part of the outer wall of the cylinder barrel, a lifting oil cylinder is controlled through each hydraulic control piece and a built-in pipeline on the valve block group, a piston rod of the lifting oil cylinder drives a hammer core unit to move upwards in a lower shell body cavity of the hammer shell body to reach a working stroke, the hydraulic control system switches a hydraulic loop, the hammer core unit moves downwards immediately, an impact head of the hammer core unit impacts an impact block positioned on the upper end face of a lower pile cap downwards, and the impact force of a hydraulic pile hammer is transmitted to precast piles from the outside for pile driving construction; and the hydraulic control system switches the hydraulic loop after receiving signals transmitted by a group of displacement sensors below, and the piston rod of the lifting oil cylinder drives the hammer core unit to ascend again, so that the hydraulic pile hammer enters another lifting and hammering operation program.
The guide plates may be disposed at a distance from each other in a vertical direction of the hammer case when disposed at four inner corners of the lower case frame.
The invention can also be that eight pull rod through holes of the upper hammer core and eight pull rod blind holes of the upper part of the lower hammer core of the hammer core unit are provided with elastic pin sleeves at the joint positions.
The invention can also be that the fastening pretightening force of the fastening pull rod is more than or equal to 200kN when the lower end thread of the fastening pull rod is screwed in the pull rod screw hole of the pull rod locking shaft.
The invention can also be that the pretightening force of the plurality of compression bolts is more than or equal to 160kN when the compression sleeve assembly is fixed on the hammer core unit.
The invention also can be that the pretightening force of the multi-layer rubber pad arranged above the inner ring of the upper cap flange of the pile cap group is more than or equal to 5500kN after the screw is fastened.
Drawings
FIG. 1 is a schematic perspective view of a hydraulic pile hammer of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a left side view of FIG. 1;
FIG. 4 is a top view of FIG. 1;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 6 is an enlarged view of part B of FIG. 2;
FIG. 7 is a partial enlarged view of portion D of FIG. 2;
FIG. 8 is a fragmentary section view taken along the direction C-C in FIG. 4;
Fig. 9 is a schematic structural view of the hammer core unit in the present invention;
FIG. 10 is a right side view of FIG. 9;
FIG. 11 is a sectional view taken along E-E of FIG. 10;
FIG. 12 is an enlarged view of part G of FIG. 10;
fig. 13 is a partial cross-sectional view taken along the direction F-F in fig. 12.
Detailed Description
The hydraulic pile hammer according to the present invention will be further described with reference to the embodiments shown in the drawings.
The hydraulic pile hammer comprises a hammer core unit 1 comprising a lower hammer core 11 and an upper hammer core 12, a hammer shell 2, a lifting oil cylinder 4, a connecting shaft assembly 6, a landing gear 5, a plurality of energy accumulator units 7, a pile cap group 3, a group of displacement sensors 28 above, a group of displacement sensors 28' below and a hydraulic system, wherein the lower hammer core 11 of the hammer core unit 1 comprises a lower hammer core upper part 110 with a center counter bore 111, an upper boss 112 and a plurality of ventilation holes 114, an impact head 113, the upper hammer core 12 is provided with a center through hole 121 and a lower pit 122, the hammer core unit 1 also comprises a buffer block 19 positioned on the upper end surface of the upper hammer core, a plurality of fastening pull rods 16 with double threads for connecting the lower hammer core and the upper hammer core into a whole, a plurality of locking holes 15 positioned on the side surfaces of the lower hammer core, a plurality of pull rod locking shafts 17 with pull rod screw holes 171 and locking screw holes 172, and a plurality of elastic pin sleeves 18 positioned between the lower hammer core and the upper hammer core; the hammer case 2 includes an upper case frame 21 having a plurality of upper cover through holes 212 and a connection bracket 213, a lower case frame 22 having a lower flange 221, a partition 211 having an oil cylinder through hole 2110 between the upper case frame and the lower case frame 22, two sets of rear guide plates 23, and a plurality of guide plates 26 located at four inner corners of the lower case frame inner chamber; the connecting bracket 213 includes a bracket riser 2131, a bracket shaft 2132, a knuckle bearing 2133 and a shaft end nut 2134; the lift cylinder 4 includes a piston rod 41 having an end screw 411, a cylinder end cover 43 having a yoke 431, a cylinder 42, and a valve block group 44 located at an upper portion of an outer wall of the cylinder; the connecting shaft assembly 6 comprises a connecting shaft body 61 with a shaft body upper shaft shoulder 611 and a shaft body lower shaft shoulder 612, a butt joint disc 62, a shaft body upper buffer pad 63, a shaft body lower buffer pad 64, a compression sleeve assembly 65 and a positioning ring 67, wherein: the pressing sleeve assembly 65 includes a pressing upper flange 651, a center ring 652, and a pressing seat 653 having a plurality of overflow holes 6531; the landing gear 5 comprises a lifting pulley block 51, a lifting hammer hook 52 and a back guide block 53; each accumulator unit 7 comprises an accumulator 70, a gland 71, a shock pad 72 and an upper end cap 73; the pile cap group 3 comprises an upper pile cap 31, a lower pile cap 32 which comprise an upper cap flange 311, an inner ring 312 and a plurality of layers of rubber pads 313, and an impact block 34 which is positioned at a pit of the end face of the lower pile cap; wherein:
The upper hammer core 12 of the hammer core unit 1 is in a cuboid shape, and four buffer blocks 19 are arranged on the upper end surface of the upper hammer core in a geometric symmetry mode; the impact on the hammer shell when the hammer core unit of the hydraulic pile hammer ascends can be effectively relieved, and therefore a good vibration-proof effect is achieved. Eight pull rod through holes 129 which are parallel to each other along the vertical direction and have a geometrically symmetrical mode in the cross section of the upper hammer core 12 are formed in the upper hammer core 12, the lower hammer core upper part 110 is in a cuboid shape, and eight pull rod blind holes 119 which are parallel to each other along the vertical direction and have a geometrically symmetrical mode in the cross section of the lower hammer core upper part are formed in the lower hammer core; projections of the eight rod through holes 129 of the upper hammer core 12 and the eight rod blind holes 119 of the lower hammer core 11 in the vertical direction of the hammer core unit 1 are overlapped and complementary; the upper hammer core 12 is arranged on the upper boss 112 of the upper end surface of the upper hammer core 110 through the lower pit 122 of the lower end surface; projections of the eight rod through holes 129 of the upper hammer core 12 and the eight rod blind holes 119 of the lower hammer core 11 in the vertical direction of the hammer core unit 1 are overlapped and complementary; eight pull rod through holes 129 of the upper hammer core 12 and eight pull rod blind holes 119 of the lower hammer core upper part 110 of the hammer core unit 1 are provided with elastic pin sleeves 18 at the joint of the eight pull rod through holes 129 and the eight pull rod blind holes; eight locking holes 15 are symmetrically arranged on four sides of the upper part 110 of the lower hammer core along the horizontal direction and are vertically communicated with eight pull rod blind holes 119; eight pull rod locking shafts 17 are respectively arranged in the locking holes 15 of the upper part 110 of the lower hammer core; eight fastening pull rods 16 respectively penetrate through the pull rod through holes 129 of the upper hammer core 12 and then enter the pull rod blind holes 119 of the upper part 110 of the lower hammer core, the lower end threads of the fastening pull rods 16 are respectively fastened to the pull rod screw holes 171 of the pull rod locking shafts 17 and then are fixed by screwing the locking screw holes 172 of the pull rod locking shafts 17, and the upper end threads of the fastening pull rods are exposed out of the upper end face of the upper hammer core 12 of the hammer core unit 1 and then are fastened by nuts; the fastening pretightening force of the fastening pull rod 16 is more than or equal to 200kN when the lower end screw thread of the fastening pull rod 16 is screwed on the pull rod screw hole 171 of the pull rod locking shaft 17. The four air holes 114 are symmetrically arranged on the four sides of the upper part 110 of the lower hammer core along the horizontal direction, and are vertically communicated with the bottom of the center counter bore 111.
The hammer shell 2 is arranged on a column guide rail of a pile frame from outside through two groups of back guide plates 23 positioned at the back of the lower shell frame 22; the upper casing frame 21 of the hammer casing 2 is connected with the lower casing frame 22 through a partition 211 to form a cuboid welding structure; the four energy accumulator units 7 are symmetrically arranged at the positions close to the four inner corners of the inner cavity of the upper shell frame 21 along the vertical direction, and each energy accumulator unit 7 is fixed on the partition 211 through the bottom of each energy accumulator 70 and then is sequentially provided with a gland 71, a shock pad 72 and an upper end cover 73 for fixing.
The hammer core unit 1 is arranged in the inner cavity of the lower shell frame 22 of the hammer shell 2, and the plurality of guide plates 26 are arranged on two sides of four inner angles of the inner cavity of the lower shell frame 22 along the vertical direction of the lower shell frame 22; the guide plates 26 are arranged at a distance from each other in the vertical direction of the hammer case 2 when disposed at the four inner corners of the lower case frame 22. After the hydraulic pile hammer is used for a period of time, if the guide plate exceeds the recommended abrasion thickness of the specification, the hydraulic pile hammer can be replaced under the condition that the hammer shell of the hydraulic pile hammer is not disassembled, so that the working strength of operators is effectively reduced, and the construction operation efficiency is improved.
The lifting cylinder 4 passes through the cylinder through hole 2110 of the baffle plate 211 of the hammer housing 2 through the cylinder 42, the fork 431 of the cylinder end cover 43 at the upper part is arranged between the two bracket vertical plates 2131 of the connecting bracket 213 after being assembled into the joint bearing 2133, and the bracket shaft 2132 passes through one bracket vertical plate 2131 of the connecting bracket 213, the fork 431 of the cylinder end cover 43 and the mounting hole of the other bracket vertical plate 2131 of the connecting bracket 213 in sequence and is fixed by the shaft end nut 2134; the end thread 411 of the piston rod 41 of the lifting cylinder 4 is fixedly provided with a butt joint disc 62 of the connecting shaft assembly 6. The joint bearing is adopted by the upper end cylinder barrel end cover fork of the lifting oil cylinder, so that the piston of the lifting oil cylinder is effectively guaranteed to have better vertical precision when the hammer core unit is lifted, the working performance of the lifting oil cylinder is improved, and the striking performance of the hydraulic hammer is favorably exerted.
The upper shaft shoulder 611 of the connecting shaft body 61 of the connecting shaft assembly 6 is in butt joint and fixed with the butt joint disc 62 through a screw, and the upper shaft shoulder 611 of the shaft body is arranged in the compaction seat 653 of the compaction sleeve assembly 65; the upper shaft cushion 63 is split and then is arranged between the pressing seat 653 and the lower shaft shoulder 612, the lower shaft shoulder 612 is arranged in the center counter bore 111 of the upper part 110 of the lower hammer core, and the lower shaft cushion 64 is positioned between the lower shaft shoulder 612 and the bottom of the center counter bore 111; the pressing sleeve assembly 65 is installed in the central through hole 121 of the upper hammer core 12 of the hammer core unit 1 after being cut along the axial direction, a pressing seat 653 at the lower end of the pressing sleeve assembly 65 is tightly attached to the inner step of the central counter bore 111 of the upper part 110 of the lower hammer core, a central ring 652 of the pressing sleeve assembly 65 is arranged on the inner wall of the central through hole 121 of the upper hammer core 12, and a pressing upper flange 651 at the upper end of the pressing sleeve assembly 65 is sleeved with a positioning ring 67 and then is fixed on the hammer core unit 1 through a plurality of pressing bolts 68; the pretightening force of the plurality of compression bolts 68 is more than or equal to 160kN when the compression sleeve assembly 65 is fixed on the hammer core unit 1; the overflow holes 6531 of the pressing seat 653 are communicated with the air holes 114 through gaps between the lower shaft shoulder 612 of the shaft body and the central counter bore 111 of the upper portion 110 of the lower hammer core. When the hydraulic pile hammer drives the pile downwards, accumulated water remained in a central counter bore at the upper part of the lower hammer core is effectively discharged, and the normal operation of the hammer core unit is ensured. In the process that the lifting cylinder lifts the hammer core unit to go upward, the cylinder barrel of the lifting cylinder enters the central through hole of the hammer core unit, so that the overall height of the hydraulic pile hammer is effectively reduced, the height of the upright post of the matched pile frame is also reduced, and the construction safety is further improved.
The landing gear 5 is arranged on a column guide rail of a pile frame from the outside through a back guide block 53, and a steel wire rope led out by a winch of the outer pile frame passes through a pulley block at the top of the pile frame and then passes through a lifting pulley block 51 of the landing gear 5 to be connected with the landing gear 5; the lifting hook 52 of the landing gear 5 hooks the hammer housing 2, a winch of the pile frame is controlled to retract a steel wire rope, the hammer housing 2 moves upwards along the upright post guide rail of the pile frame by virtue of the two groups of back guide plates 23 until a precast pile from the outside is pulled completely into the lower pile cap 32 of the pile cap group 3, and when the steel wire rope of the winch is controlled to enable the hammer housing 2 to move downwards to a stop position together with the precast pile, the lifting hook 52 of the landing gear 5 is controlled to enable the hammer housing 2 to be separated from the hammer housing 2. In the pile sinking construction process of the precast pile completed by the hydraulic pile hammer, the lifting hook of the landing gear is always separated from the hammer shell of the hydraulic pile hammer, so that the safety accident of pile frame collapse is avoided when a pile is slipped in the hammering process, and the safety performance of pile foundation operation is improved.
The pile cap group 3 is fixedly arranged on the lower flange 221 of the lower shell frame 22 through the upper cap flange 311 of the upper pile cap 31, the multi-layer rubber pad 313 is arranged above the inner ring 312 of the upper cap flange 311 in a mode of being higher than the upper end surface of the upper cap flange 311, and has a certain pretightening force after being fastened by screws, and the pretightening force is more than or equal to 5500kN; the impact of pile cap rebound on the hammer shell can be effectively isolated, the safety construction of the hydraulic pile hammer is facilitated, and the service life of the hydraulic pile hammer is prolonged. The lower pile cap 32 is sleeved in the hole of the upper pile cap 31, and the upper end surface of the impact block 34 is contacted with the bottom plane of the impact head 113 of the hammer core unit 1; the lower pile cap 32 is sleeved on the pile head of the prestressed pile or the tubular pile from the outside; and transmitting the impact force from the core unit of the hydraulic pile hammer to the prestressed pile or the tubular pile to realize the pile sinking construction of the hydraulic hammer.
The four energy accumulator units 7 are arranged on the partition 211 at the four inner corners of the inner cavity of the upper shell frame 21 along the vertical direction of the hammer shell 2, each energy accumulator 70, each gland 71 and each shock pad 72 are sequentially arranged on the upper end surface of the partition 211, and are fixedly arranged on the upper end surface of the hammer shell 2 through each upper end cover 73; the energy accumulator unit 7 is connected with the hydraulic control system through a pipeline to complete lifting, reversing and hammering procedures of the hydraulic pile hammer, so that impact generated when the flow of hydraulic oil in the pipeline of the hydraulic system changes rapidly can be effectively absorbed and buffered, and damage to hydraulic elements is relieved. In addition, the shock pad that sets up through the energy storage unit can effectively avoid impact and vibration in the hydraulic pile hammer operation in-process, guarantees the normal operating of energy storage unit, guarantees that hydraulic pile hammer job stabilization.
The upper group of displacement sensors 28 and the lower group of displacement sensors 28' are arranged up and down along the vertical direction of the hammer casing 2, each group of displacement sensors is two, and each displacement sensor is symmetrically arranged on the left side surface and the right side surface of the lower casing frame 22; the upper group of displacement sensors 28 monitor the uplink limit position of the hammer core unit 1, and when the upper end surface of the hammer core unit 1 reaches the position, signals are transmitted to the hydraulic control system, so that the hydraulic pile hammer can stop running in time; the displacement sensors 28' detect the up-down operation of the hammer core unit 1, transmit signals to the hydraulic control system, and timely convert the expansion and contraction actions of the lifting cylinder 4 through the hydraulic control parts of the valve block group 44, so that the hammer core unit 1 can complete lifting and hammering operations in one working cycle.
The hydraulic control system is connected with a plurality of energy accumulator units 7 and a valve block group 44 at the upper part of the outer wall of the cylinder barrel through hydraulic pipelines, and the lifting cylinder 4 is operated through each hydraulic control piece and a built-in pipeline which are arranged on the valve block group; the piston rod 41 of the lifting cylinder 4 drives the hammer core unit 1 to move upwards in the inner cavity of the lower shell 22 of the hammer shell 2, when the impact head 1 reaches the displacement sensor 28 positioned above the inner cavity of the lower shell 22, the hydraulic circuit is switched, the hammer core unit 1 moves downwards immediately, the impact head 113 of the lower hammer core 11 impacts the impact block 34 positioned on the upper end surface of the lower pile cap 32, and the impact force of the hydraulic pile hammer is transmitted to a precast pile from the outside for pile driving construction. The hammer housing 2 of the hammer core unit 1 switches the hydraulic circuit when reaching the displacement sensor 28 located below the inner cavity of the lower housing frame 22, and the hydraulic pile hammer enters another lifting and hammering operation program.
The hydraulic pile hammer has the characteristics of good integral rigidity, impact resistance, convenient guide plate replacement and the like, effectively isolates impact of pile cap rebound on a hammer shell, reduces the integral height of the hydraulic pile hammer, further improves the safety performance of pile driving operation, improves pile driving operation efficiency and reduces engineering cost of construction units.
Claims (6)
1. The utility model provides a hydraulic pile hammer, includes hammer core unit (1) that contains lower hammer core (11) and last hammer core (12), hammer casing (2), lift cylinder (4), connecting axle assembly (6), undercarriage (5), a plurality of energy storage unit (7), pile cap group (3), a set of displacement sensor (28) of top, a set of displacement sensor (28') and hydraulic control system of below, wherein:
The lower hammer core (11) of the hammer core unit (1) comprises a lower hammer core upper part (110) with a center counter bore (111), an upper boss (112) and a plurality of ventilation holes (114), an impact head (113), an upper hammer core (12) with a center through hole (121) and a lower pit (122), a buffer block (19) positioned on the upper end surface of the upper hammer core, a plurality of fastening pull rods (16) with double-headed threads for connecting the lower hammer core and the upper hammer core into a whole, a plurality of locking holes (15) positioned on the side surface of the lower hammer core, a plurality of pull rod locking shafts (17) with pull rod screw holes (171) and locking screw holes (172) and a plurality of elastic pin sleeves (18) positioned between the lower hammer core and the upper hammer core;
The hammer housing (2) comprises a connecting bracket (213) and an upper housing frame (21) with a plurality of upper cover through holes (212), a lower housing frame (22) with a lower flange (221), a baffle plate (211) with an oil cylinder through hole (2110) between the upper housing frame and the lower housing frame (22), two groups of back guide plates (23) and a plurality of guide plates (26) positioned at four inner corners of the inner cavity of the lower housing frame, wherein: the connecting bracket (213) comprises a bracket vertical plate (2131), a bracket shaft (2132), a knuckle bearing (2133) and a shaft end nut (2134);
The lifting oil cylinder (4) comprises a piston rod (41) with an end thread (411), a cylinder barrel end cover (43) with a fork (431), a cylinder barrel (42) and a valve block group (44) positioned at the upper part of the outer wall of the cylinder barrel;
The connecting shaft assembly (6) comprises a connecting shaft body (61) with a shaft body upper shaft shoulder (611) and a shaft body lower shaft shoulder (612), a butt joint disc (62), a shaft body upper buffer pad (63), a shaft body lower buffer pad (64), a compression sleeve assembly (65) and a positioning ring (67), wherein: the pressing sleeve assembly (65) comprises a pressing upper flange (651), a central ring (652) and a pressing seat (653) with a plurality of overflow holes (6531);
The landing gear (5) comprises a lifting pulley block (51), a lifting hammer hook (52) and a back guide block (53);
each accumulator unit (7) comprises an accumulator (70), a gland (71), a shock pad (72) and an upper end cover (73);
the pile cap group (3) comprises an upper pile cap (31) comprising an upper cap flange (311), an inner ring (312) and a multi-layer rubber pad (313), a lower pile cap (32) and an impact block (34) positioned at a pit on the end face of the lower pile cap;
The method is characterized in that:
The upper hammer core (12) of the hammer core unit (1) is in a cuboid shape, and the buffer blocks (19) are arranged on the upper end surface of the upper hammer core in a geometric symmetry mode; eight pull rod through holes (129) which are parallel to each other along the vertical direction and have a geometrically symmetrical mode in the cross section of the upper hammer core (12) are formed in the upper hammer core (110), the lower hammer core is in a cuboid shape, and eight pull rod blind holes (119) which are parallel to each other along the vertical direction and have a geometrically symmetrical mode in the cross section of the lower hammer core are formed in the lower hammer core; projections of the eight pull rod through holes (129) of the upper hammer core (12) and the eight pull rod blind holes (119) of the lower hammer core (11) in the vertical direction of the hammer core unit (1) are overlapped and complementary; the upper hammer core (12) is arranged on an upper boss (112) of the upper end surface of the upper part (110) of the lower hammer core through a lower pit (122) of the lower end surface; the projections of the upper hammer core (12) of the hammer core unit (1) and the lower hammer core upper part (110) of the lower hammer core (11) in the vertical direction of the hammer core unit (1) are overlapped and complementary; eight locking holes (15) are symmetrically arranged on four sides of the lower hammer core along the horizontal direction of the upper part (110) of the lower hammer core and are vertically communicated with eight pull rod blind holes (119); eight pull rod locking shafts (17) are respectively arranged in each locking hole (15) at the upper part (110) of the lower hammer core; eight fastening pull rods (16) respectively penetrate through each pull rod through hole (129) of the upper hammer core (12) and then enter each pull rod blind hole (119) of the upper part (110) of the lower hammer core, lower end threads of the eight fastening pull rods are respectively fastened to pull rod screw holes (171) of each pull rod locking shaft (17) and then are fixed after screws are screwed into locking screw holes (172) of the pull rod locking shafts (17), and upper end threads of the eight fastening pull rods are exposed out of the upper end face of the upper hammer core (12) of the hammer core unit (1) and then are fastened by nuts; the four air holes (114) are symmetrically arranged on the four side surfaces of the upper part (110) of the lower hammer core along the horizontal direction and are vertically communicated with the bottom of the center counter bore (111);
The hammer shell (2) is arranged on a column guide rail of a pile frame from outside through two groups of back guide plates (23) positioned at the back of a lower shell frame (22); an upper casing frame (21) of the hammer casing (2) is connected with a lower casing frame (22) through a partition plate (211) into a rectangular welding structure; four energy accumulator units (7) are symmetrically arranged at the positions close to four inner corners of the inner cavity of the upper shell frame body (21) along the vertical direction, and each energy accumulator unit (7) is fixed on a partition plate (211) through the bottom of each energy accumulator (70) and then is sequentially provided with a gland (71), a shock pad (72) and an upper end cover (73) for fixing;
the hammer core unit (1) is arranged in the inner cavity of the lower shell frame (22) of the hammer shell (2), and the plurality of guide plates (26) are arranged in the inner cavities at two sides of the four inner corners of the lower shell frame (22) in a vertical direction in a spacing mode;
The lifting oil cylinder (4) is arranged between two support vertical plates (2131) of the connecting support (213) after being assembled into a joint bearing (2133) through an oil cylinder through hole (2110) formed in a cylinder barrel (42) of the lifting oil cylinder and penetrating through a baffle plate (211) of the hammer shell (2), and a fork (431) of the cylinder barrel end cover (43) at the upper part of the lifting oil cylinder is fixed by shaft end nuts (2134) after sequentially penetrating through one support vertical plate (2131) of the connecting support (213), the fork (431) of the cylinder barrel end cover (43) and a mounting hole of the other support vertical plate (2131) of the connecting support (213); an end thread (411) of a piston rod (41) of the lifting oil cylinder (4) is fixedly provided with a butt joint disc (62) of the connecting shaft assembly (6);
The upper shaft shoulder (611) of the shaft body (61) of the connecting shaft assembly (6) is fixedly butted with the butting disc (62) through a screw, and the upper shaft shoulder (611) of the shaft body is arranged in the compaction seat (653) of the compaction sleeve assembly (65); the upper shaft body buffer pad (63) is installed between the pressing seat (653) and the lower shaft body shaft shoulder (612) after being split, the lower shaft body shaft shoulder (612) is arranged in the center counter bore (111) of the upper part (110) of the lower hammer core, and the lower shaft body buffer pad (64) is positioned between the lower shaft body shaft shoulder (612) and the bottom of the center counter bore (111); the pressing sleeve assembly (65) is arranged in a central through hole (121) of an upper hammer core (12) of the hammer core unit (1) after being cut along the axial direction of the pressing sleeve assembly, a pressing seat (653) at the lower end of the pressing sleeve assembly is tightly attached to an inner step of a central counter bore (111) of the upper part (110) of the lower hammer core, a central ring (652) of the pressing sleeve assembly (65) is arranged on the inner wall of the central through hole (121) of the upper hammer core (12), and a pressing upper flange (651) at the upper end of the pressing sleeve assembly is sleeved with a positioning ring (67) and then fixes the pressing sleeve assembly (65) on the hammer core unit (1) through a plurality of pressing bolts (68); the overflow holes (6531) of the pressing seat (653) are communicated with the ventilation holes (114) through gaps between the lower shaft shoulder (612) of the shaft body and the center counter bore (111) of the upper part (110) of the lower hammer core;
The landing gear (5) is arranged on a column guide rail of a pile frame from the outside through a back guide block (53) of the landing gear, and a steel wire rope led out by a winch of the outer pile frame passes through a pulley block at the top of the pile frame and then passes through a lifting pulley block (51) of the landing gear (5) to be connected with the landing gear (5); the lifting hammer hook (52) of the landing gear (5) hooks the hammer shell (2), a winch of the pile frame is controlled to retract a steel wire rope, the hammer shell (2) moves upwards along a column guide rail of the pile frame by means of two groups of back guide plates (23) until a precast pile from the outside is pulled completely into a lower pile cap (32) of the pile cap group (3), and when the steel wire rope of the winch is controlled to enable the hammer shell (2) to move downwards to a stay position together with the precast pile, the lifting hammer hook (52) of the landing gear (5) is controlled to enable the lifting hammer hook to be separated from the hammer shell (2);
The pile cap group (3) is fixedly arranged on a lower flange (221) of the lower shell frame body (22) through an upper cap flange (311) of the upper pile cap (31), and the multi-layer rubber pad (313) is arranged above an inner ring (312) of the upper cap flange (311) in a mode of being higher than the upper end surface of the upper cap flange (311) and has a certain pretightening force after being fastened by screws; the lower pile cap (32) is sleeved in the hole of the upper pile cap (31), and the upper end surface of the impact block (34) is contacted with the bottom plane of the impact head (113) of the hammer core unit (1); the lower pile cap (32) is sleeved on the pile head of the prestressed pile or the tubular pile from the outside;
Four energy accumulator units (7) are arranged on partition plates (211) at four inner corners of the inner cavity of the upper shell frame (21) along the vertical direction of the hammer shell (2), each energy accumulator (70), each gland (71) and each shock pad (72) are sequentially arranged on the upper end surface of the partition plate (211), and are fixedly arranged on the upper end surface of the hammer shell (2) through each upper end cover (73); the energy accumulator unit (7) is connected with the hydraulic control system through a pipeline;
The upper group of displacement sensors (28) and the lower group of displacement sensors (28') are arranged up and down along the vertical direction of the hammer shell (2), each group of displacement sensors is two, and each displacement sensor is symmetrically arranged on the left side surface and the right side surface of the lower shell frame (22); the upper group of displacement sensors (28) monitor the uplink limit position of the hammer core unit (1), and when the upper end surface of the hammer core unit (1) reaches the position, signals are transmitted to the hydraulic control system, so that the hydraulic pile hammer can stop running in time; the lower group of displacement sensors (28') detects the up-down operation of the hammer core unit (1), signals are transmitted to the hydraulic control system, and the hydraulic control piece of the valve block group (44) timely converts the stretching and contracting actions of the lifting oil cylinder (4) to enable the hammer core unit (1) to complete lifting and hammering operation in one working cycle;
The hydraulic control system is connected with a plurality of energy accumulator units (7) through hydraulic pipelines, a valve block group (44) is arranged at the upper part of the outer wall of the cylinder barrel, a lifting oil cylinder (4) is operated through each hydraulic control piece and a built-in pipeline on the valve block group, a piston rod (41) of the lifting oil cylinder (4) drives a hammer core unit (1) to move upwards in an inner cavity of a lower shell frame (22) of a hammer shell (2) to reach a working stroke, the hydraulic control system switches a hydraulic loop, the hammer core unit (1) moves downwards immediately, an impact head (113) of the hammer core unit impacts an impact block (34) positioned at the upper end face of a lower pile cap (32) downwards, and the impact force of a hydraulic pile hammer is transmitted to a precast pile from the outside for pile driving construction; the hydraulic control system switches the hydraulic circuit after receiving signals transmitted by a group of displacement sensors (28') below, and a piston rod (41) of the lifting oil cylinder (4) drives the hammer core unit (1) to ascend again, so that the hydraulic pile hammer enters another lifting and hammering operation program.
2. Hydraulic pile hammer according to claim 1, characterized in that the guide plates (26) are arranged at a distance from each other in the vertical direction of the hammer housing (2) when they are arranged at the four inner corners of the lower housing frame (22).
3. Hydraulic pile hammer according to claim 1, characterized in that eight tie rod through holes (129) of the upper core (12) and eight tie rod blind holes (119) of the lower core upper part (110) of the core unit (1) are provided with elastic pin sleeves (18) at their junctions.
4. The hydraulic pile hammer according to claim 1, wherein the tightening pre-tightening force of the tightening rod (16) is greater than or equal to 200kN when the lower end thread of the tightening rod is screwed into the rod screw hole (171) of the rod locking shaft (17).
5. The hydraulic pile hammer according to claim 1, characterized in that the plurality of compression bolts (68) fix the compression sleeve assembly (65) to the core unit (1) with a preload of 160kN or more.
6. The hydraulic pile hammer according to claim 1, characterized in that the multi-layer rubber pad (313) arranged above the inner ring (312) of the upper cap flange (311) of the pile cap group (3) is subjected to a pre-tightening force of 5500kN or more after screw fastening.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910814842.3A CN110485419B (en) | 2019-08-30 | 2019-08-30 | Hydraulic pile driving hammer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910814842.3A CN110485419B (en) | 2019-08-30 | 2019-08-30 | Hydraulic pile driving hammer |
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| CN110485419B true CN110485419B (en) | 2024-06-11 |
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| CN112647501B (en) * | 2020-12-22 | 2023-01-10 | 珠海云帆建筑工程有限公司 | Stable form pile equipment with effect is offset to recoil |
| CN114790737B (en) * | 2022-03-31 | 2023-07-28 | 湖北擎岩智能桩工有限公司 | Hydraulic pile machine |
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| RU2188905C2 (en) * | 2000-10-09 | 2002-09-10 | Открытое акционерное общество "Научно-исследовательский институт транспортного строительства" | Hydraulic pile-driving hammer |
| CN101700617A (en) * | 2009-10-22 | 2010-05-05 | 天津银河阀门有限公司 | Hydraulic pressure butterfly valve shaft installation machine |
| CN109914409A (en) * | 2019-03-28 | 2019-06-21 | 上海工程机械厂有限公司 | A kind of hydraulic impact hammer |
| CN210766766U (en) * | 2019-08-30 | 2020-06-16 | 上海工程机械厂有限公司 | Hydraulic pile hammer |
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2019
- 2019-08-30 CN CN201910814842.3A patent/CN110485419B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2188905C2 (en) * | 2000-10-09 | 2002-09-10 | Открытое акционерное общество "Научно-исследовательский институт транспортного строительства" | Hydraulic pile-driving hammer |
| CN101700617A (en) * | 2009-10-22 | 2010-05-05 | 天津银河阀门有限公司 | Hydraulic pressure butterfly valve shaft installation machine |
| CN109914409A (en) * | 2019-03-28 | 2019-06-21 | 上海工程机械厂有限公司 | A kind of hydraulic impact hammer |
| CN210766766U (en) * | 2019-08-30 | 2020-06-16 | 上海工程机械厂有限公司 | Hydraulic pile hammer |
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