CN113073645B - Electromagnetic pile hammer - Google Patents
Electromagnetic pile hammer Download PDFInfo
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- CN113073645B CN113073645B CN202110203576.8A CN202110203576A CN113073645B CN 113073645 B CN113073645 B CN 113073645B CN 202110203576 A CN202110203576 A CN 202110203576A CN 113073645 B CN113073645 B CN 113073645B
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- hammer
- shell
- hammer body
- bottom end
- hole
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/10—Follow-blocks of pile-drivers or like devices
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- 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
- E02D7/10—Power-driven drivers with pressure-actuated hammer, i.e. the pressure fluid acting directly on the hammer structure
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- 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
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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)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The utility model provides an electromagnetism pile hammer belongs to the mechanical equipment field. The electromagnetic pile hammer comprises a linear motor and a hammer body assembly; the linear motor comprises a stator assembly and a rotor assembly, the stator assembly comprises a sealing shell and a coil, the coil is positioned in the sealing shell and is connected with the sealing shell, the rotor assembly comprises a driving shaft, and the driving shaft is inserted in the coil in an axially movable manner; the hammer body assembly comprises a hammer shell, a connecting shaft and a hammer body, the top end of the hammer shell is communicated with the bottom end of the sealing shell, the connecting shaft is axially movably located in the hammer shell, the top end of the connecting shaft is connected with the bottom end of the driving shaft, the bottom end of the connecting shaft is axially movably inserted in the top end of the hammer body, and the hammer body is axially movably located in the hammer shell. The electromagnetic pile driving hammer can solve the problems of long deepwater hydraulic pipeline and large pressure loss of the traditional hydraulic driving pile driving hammer.
Description
Technical Field
The disclosure belongs to the field of mechanical equipment, and particularly relates to an electromagnetic pile hammer.
Background
As the field of ocean engineering is gradually expanded to deep sea, the demand for various advanced underwater production operation technologies is increasingly vigorous. Particularly underwater piling operation, and is widely applied to a plurality of fields such as construction, navigation engineering, oilfield exploitation and the like.
In the related art, the core component of the underwater pile driving operation is a pile driving hammer, and the pile driving hammer comprises a hydraulic driving unit, a hammer body assembly, an electric control unit and the like. When the pile driving hammer works actually, the electric control unit controls the hydraulic driving unit to work so as to drive the hammer body assembly to reciprocate back and forth, and then the pile leg is beaten.
However, when the pile driving hammer is used for driving piles in ultra-deep water, because the hammer body assembly is located in the deep water, an ultra-long hydraulic pipeline needs to be provided, so that hydraulic loss is excessive, and the efficiency of underwater pile driving is seriously affected.
Disclosure of Invention
The embodiment of the disclosure provides an electromagnetic pile hammer, which can solve the problems of long deepwater hydraulic pipeline and large pressure loss. The technical scheme is as follows:
the disclosed embodiment provides an electromagnetic pile hammer, which comprises a linear motor and a hammer body assembly;
the linear motor comprises a stator assembly and a rotor assembly, the stator assembly comprises a sealing shell and a coil, the coil is positioned in the sealing shell and is connected with the sealing shell, the rotor assembly comprises a driving shaft, and the driving shaft is inserted in the coil in an axially movable manner;
the hammer body assembly comprises a hammer shell, a connecting shaft and a hammer body, the top end of the hammer shell is communicated with the bottom end of the sealing shell, the connecting shaft is axially movably located in the hammer shell, the top end of the connecting shaft is connected with the bottom end of the driving shaft, the bottom end of the connecting shaft is axially movably inserted in the top end of the hammer body, and the hammer body is axially movably located in the hammer shell.
In another implementation manner of the present disclosure, the stator assembly further includes two guide bearings, the two guide bearings are respectively located in the sealing shell at intervals, outer edges of the guide bearings are connected with an inner wall of the sealing shell, and inner edges of the guide bearings are in sliding fit with the driving shaft.
In yet another implementation of the present disclosure, the connecting shaft includes a first transmission shaft, a second transmission shaft, and a flexible sleeve;
the top end of the first transmission shaft is inserted into the bottom end of the driving shaft;
the bottom end of the second transmission shaft is inserted into the hammer body;
the flexible sleeve is respectively sleeved on the bottom end of the first transmission shaft and the top end of the second transmission shaft.
In another implementation manner of the present disclosure, the top end of the hammer body has a closed accommodating cavity, and the outer wall of the second transmission shaft near the bottom end has an outer flange, and the outer flange is slidably located in the accommodating cavity;
the hammer body assembly further comprises two sets of disc springs, the disc springs are located in the containing cavity and sleeved outside the second transmission shaft, the two sets of disc springs are located on two opposite sides of the outer flange respectively, one end of each disc spring abuts against the outer flange, and the other end of each disc spring abuts against the inner wall of the containing cavity.
In yet another implementation of the present disclosure, the hammer block includes a main body hammer and an end cap;
the top end of the main body hammer is provided with an open slot;
the end cover covers the opening of the open slot to form the accommodating cavity.
In still another implementation manner of the present disclosure, the hammer body has a connection hole therein, and the connection hole communicates a space on the top end side of the hammer body and a space on the bottom end side of the hammer body, respectively.
In yet another implementation of the present disclosure, the connection hole includes a main through hole and a plurality of branch holes;
the first end of the main through hole penetrates through the bottom end of the hammer body to be communicated with the space on one side of the bottom end of the hammer body, and the second end of the main through hole is positioned in the hammer body;
each branch hole is arranged along the circumference of the main through hole, the first end of each branch hole is communicated with the second end of the main through hole, and the second end of each branch hole extends away from the main through hole and penetrates through the side wall of the hammer body to be communicated with the space on one side of the top end of the hammer body.
In still another implementation manner of the present disclosure, the outer wall of the hammer body has a plurality of communication grooves, each of the communication grooves is arranged at intervals along the circumferential direction of the hammer body, each of the communication grooves corresponds to each of the branch holes one to one, first ends of the communication grooves communicate with second ends of the corresponding branch holes, and the second ends of the communication grooves communicate with a space on the bottom end side of the hammer body.
In yet another implementation of the present disclosure, the hammer block assembly further includes a bottom case and a striking block;
the top end of the bottom shell is connected with the bottom end of the hammer shell, the interior of the bottom shell is communicated with the interior of the hammer shell, and an inner flange is arranged at the bottom end of the bottom shell;
the striking block is movably arranged in the bottom shell along the axial direction of the connecting shaft, an annular bulge is arranged on the outer wall of the striking block, and the outer diameter of the annular bulge is larger than the inner diameter of the inner flange and the inner diameter of the hammer shell.
In yet another implementation manner of the present disclosure, the hammer assembly further includes a buffer sleeve, the buffer sleeve is located in the bottom casing, the buffer sleeve is sleeved on the outer wall of the striking block, and two ends of the buffer sleeve are clamped between the annular protrusion and the bottom of the hammer casing.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
when the electromagnetism pile hammer that provides through this disclosed embodiment is piling, because this electromagnetism pile hammer includes linear electric motor and hammer block subassembly, so can provide the power supply through linear electric motor to the hammer block subassembly for the hammer block subassembly can be beaten the spud leg production, so that realize piling the spud leg.
Because this linear electric motor includes stator module and active cell subassembly, so can provide the installation basis to active cell subassembly through stator module, simultaneously through the drive shaft among the active cell subassembly, drive connecting axle and hammer block removal to strike piece production impact force, avoid adopting hydraulic structure drive hammer block to remove, and because the too long problem that leads to pressure loss big that leads to of hydraulic pressure pipeline. That is to say, in the pile driving hammer in this embodiment, the linear motor is adopted to realize the movement of the hammer body so as to generate corresponding striking energy, and pile driving work is completed, so that the pile driving hammer has a compact structure and a wide energy adjustment range.
Moreover, due to the fact that the connecting shaft in the pile driving hammer device is arranged, the hammer body and the driving shaft can be firmly assembled together, and the problem that the hammer body and the driving shaft are not firmly assembled due to the fact that the driving shaft is not rigid is solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is an external structural schematic diagram of an electromagnetic pile driving hammer provided by an embodiment of the present disclosure;
fig. 2 is a schematic diagram of the internal structure of an electromagnetic pile driving hammer provided by the embodiment of the disclosure;
fig. 3 is a schematic structural view of a first part of an electromagnetic pile driving hammer provided by the embodiment of the disclosure;
FIG. 4 is a schematic structural diagram of a brake assembly provided in the embodiments of the present disclosure;
fig. 5 is a schematic structural view of a second part of the electromagnetic pile driving hammer provided by the embodiment of the disclosure;
FIG. 6 is a schematic structural diagram of a hammer block provided in an embodiment of the present disclosure;
FIG. 7 is a schematic structural diagram of a striking block provided by an embodiment of the present disclosure;
FIG. 8 is a schematic structural view of a hammer case provided by an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a pile cap provided by an embodiment of the disclosure.
The symbols in the drawings represent the following meanings:
1. a linear motor; 11. a stator assembly; 112. sealing the shell; 1121. a sealing cover; 1122. a stator housing; 1123. a hoisting ring; 113. a coil; 114. a guide bearing; 12. a mover assembly; 121. a drive shaft; 13. a brake assembly; 131. a drive member; 132. a wedge-shaped push block; 133. a wedge-shaped brake pad; 110. a moving chamber;
2. a hammer block assembly; 21. a hammer housing; 211. a communicating hole; 212. a first reinforcing rib;
22. a connecting shaft; 221. a first drive shaft; 222. a second drive shaft; 2221. an outer flange; 223. a flexible sleeve; 23. a hammer body; 230. an accommodating cavity; 231. a main body hammer; 2311. an open slot; 232. an end cap; 233. connecting holes; 2331. a main through hole; 2332. a branch hole; 234. a communicating groove; 24. a disc spring; 25. a bottom case; 250. an inner flange; 251. a second reinforcing rib; 26. striking a block; 261. a first through hole; 2611. a cylindrical hole; 2612. a tapered hole; 262. a second through hole; 263. an annular projection; 264. a cylinder; 265. a cone; 27. a buffer sleeve;
3. a connecting assembly; 31. a connecting flange; 311. a flange through hole; 312. a third reinforcing rib; 32. a gasket;
101. pile caps; 102. pile legs; 103. and (4) water eyes.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
The disclosed embodiment provides an electromagnetic pile driving hammer, which comprises a linear motor 1 and a hammer body assembly 2, as shown in fig. 1.
Fig. 2 is a schematic diagram of an internal structure of an electromagnetic pile driving hammer provided by an embodiment of the present disclosure, and in conjunction with fig. 2, a linear motor 1 includes a stator assembly 11 and a mover assembly 12, the stator assembly 11 includes a sealing shell 112 and a coil 113, the coil 113 is located in the sealing shell 112 and is connected to the sealing shell 112, the mover assembly 12 includes a driving shaft 121, and the driving shaft 121 is axially movably inserted in the coil 113.
The hammer assembly 2 comprises a hammer shell 21, a connecting shaft 22 and a hammer body 23, wherein the top end of the hammer shell 21 is communicated with the bottom end of the sealing shell 112, the connecting shaft 22 is axially movably positioned in the hammer shell 21, the top end of the connecting shaft 22 is connected with the bottom end of the driving shaft 121, the bottom end of the connecting shaft 22 is axially movably inserted in the top end of the hammer body 23, and the hammer body 23 is axially movably positioned in the hammer shell 21.
When the electromagnetic pile driving hammer provided by the embodiment of the disclosure drives a pile, since the electromagnetic pile driving hammer comprises the linear motor 1 and the hammer body assembly 2, a power source can be provided for the hammer body assembly 2 through the linear motor 1, so that the hammer body assembly 2 can strike a pile leg, so as to achieve pile driving on the pile leg 102.
Because this linear electric motor 1 includes stator module 11 and active cell subassembly 12, so can provide the installation basis to active cell subassembly 12 through stator module 11, simultaneously through the power supply of coil 113 for drive shaft 121 realizes linear movement under electromagnetic induction's effect, and then drives connecting axle 22 and hammer block 23 and remove, so as to produce the impact force to spud leg 102, when avoiding adopting hydraulic structure drive hammer block 23 to remove, because the too long problem that leads to pressure loss is big that leads to of hydraulic pressure pipeline.
That is to say, in the pile driving hammer of the present embodiment, the linear motor 1 is adopted to move the hammer body 23, so as to generate corresponding striking energy to complete the pile driving operation, and thus the pile driving hammer device has a compact structure and a wide energy adjustment range. Moreover, due to the arrangement of the connecting shaft 22 in the pile driving hammer device, the hammer body 23 and the driving shaft 121 can be firmly assembled together, and the problem that the assembly between the hammer body 23 and the driving shaft 121 is not firm because the driving shaft 121 is not rigid is avoided.
Fig. 3 is a schematic structural diagram of a first part of an electromagnetic pile driving hammer provided by an embodiment of the present disclosure, and in conjunction with fig. 3, the sealing shell 112 exemplarily includes a sealing hood 1121 and a stator shell 1122. The bottom end of the sealing cover 1121 is connected to the top end of the stator housing 1122, the sealing cover 1121, the stator housing 1122 and the hammer housing 21 together form a moving chamber 110, the driving shaft 121, the connecting shaft 22 and the hammer 23 are movably located in the moving chamber 110, and the plurality of coils 113 are stacked and located in the stator housing 1122 and connected to the inner wall of the stator housing 1122.
In the above implementation, the sealing housing 112 with the above structure can provide a relatively sealed environment for the driving shaft 121 through the sealing cover 1121 and the stator housing 1122.
In this embodiment, a plurality of displacement sensors (not shown) may be disposed inside the sealing cover 1121, and the displacement sensors are used for detecting the displacement of the driving shaft 121 during movement, so as to ensure that the driving shaft 121 can move in a proper range.
Illustratively, the top end of the sealing cover 1121 is provided with a hanging ring 1123, and the hanging ring 1123 can be arranged to facilitate hoisting and installation of the pile driving hammer device.
Illustratively, the stator assembly 11 further includes two guide bearings 114, the two guide bearings 114 are respectively spaced apart and located in the sealing shell 112, the outer edges of the guide bearings 114 are connected with the inner wall of the sealing shell 112, and the inner edges of the guide bearings 114 are in sliding fit with the driving shaft 121.
In the above implementation, the guide bearing 114 is disposed to limit the radial direction of the driving shaft 121 when the driving shaft 121 moves, so as to ensure that the driving shaft 121 can only move along the axial direction thereof.
The guide bearing 114 is in clearance fit with the drive shaft 121.
Fig. 4 is a schematic structural diagram of a brake assembly provided by an embodiment of the present disclosure, and in conjunction with fig. 4, for example, the linear motor 1 further includes the brake assembly 13, and the brake assembly 13 includes a driving member 131, two wedge-shaped push blocks 132, and two wedge-shaped brake pads 133.
The driving member 131 is located inside the sealing housing 112 and is connected to the inner wall of the sealing housing 112.
Two wedge-shaped push blocks 132 are movably arranged in the sealing shell 112 and are symmetrically arranged on two sides of the driving shaft 121 along the axial direction of the driving shaft 121, the moving direction of the wedge-shaped push blocks 132 is along the axial direction of the driving shaft 121, and the wedge-shaped push blocks 132 are in transmission connection with the driving piece 131.
The wedge-shaped brake pads 133 correspond to the wedge-shaped push blocks 132 one by one, the wedge-shaped brake pads 133 are radially movably located in the seal shell 112 and are sleeved on the second end of the driving shaft 121, the outer walls of the wedge-shaped brake pads 133 are provided with first wedge-shaped surfaces, the inner walls of the wedge-shaped push blocks 132 are provided with second wedge-shaped surfaces, and the outer walls of the wedge-shaped brake pads 133 are in sliding fit with the inner walls of the wedge-shaped push blocks 132 through the first wedge-shaped surfaces and the second wedge-shaped surfaces.
In above-mentioned implementation, the setting of brake subassembly 13 can conveniently brake drive shaft 121, guarantees simultaneously that drive shaft 121 can effectual location.
In practical use, when the driving shaft 121 needs to be braked, the driving member 131 can be controlled to drive the wedge-shaped pushing block 132 to move downwards along the axial direction, so as to clamp the wedge-shaped brake pad 133, and further, the driving shaft 121 is locked by the wedge-shaped brake pad 133, so that the axial movement of the driving shaft 121 is limited, and the driving shaft 121 is braked. On the contrary, when the driving shaft 121 does not need to be braked, the driving member 131 can be controlled to drive the wedge-shaped pushing block 132 to move axially upward and away from the wedge-shaped brake pad 133, and then the wedge-shaped brake pad 133 automatically releases the driving shaft 121, so that the axial movement of the driving shaft 121 is not limited, and the brake is released.
In this embodiment, the linear motor 1 is controlled by alternating current.
Referring again to fig. 2, optionally, the electromagnetic pile driving hammer further comprises a connection assembly 3, the connection assembly 3 comprising a connection flange 31 and a washer 32.
The connecting flange 31 is located between the sealing shell 112 and the hammer shell 21, and two opposite end surfaces of the connecting flange 31 are respectively connected with the bottom end of the sealing shell 112 and the top end of the hammer shell 21.
The washer 32 is interposed between the connecting flange 31 and the hammer case 21. The inside of the connecting flange 31 communicates with the hammer case 21 and the inside of the seal case 112.
In the above implementation, the connecting assembly 3 is provided to firmly fit the seal housing 112 of the linear motor 1 and the hammer housing 21 together.
Illustratively, the side wall of the connecting flange 31 further has a plurality of flange through holes 311, and the flange through holes 311 penetrate the inner side wall and the outer side wall of the connecting flange 31.
In the above-described embodiment, the flange through hole 311 is provided to communicate the inside of the connection flange 31 with the outside, thereby ensuring that water in the connection flange 31 can flow to the outside.
Fig. 5 is a schematic structural view of a second part of the electromagnetic pile driving hammer provided by the embodiment of the disclosure, and in conjunction with fig. 5, the connecting shaft 22 includes a first transmission shaft 221, a second transmission shaft 222 and a flexible sleeve 223. The top end of the first transmission shaft 221 is inserted into the bottom end of the drive shaft 121. The bottom end of the second transmission shaft 222 is inserted into the hammer 23.
The flexible sleeve 223 is respectively sleeved on the bottom end of the first transmission shaft 221 and the top end of the second transmission shaft 222.
In the above implementation manner, the connecting shaft 22 is configured as above, and the first transmission shaft 221 and the second transmission shaft 222 can be flexibly connected through the flexible sleeve 223, so that the flexible connection between the driving shaft 121 and the hammer block 23 is realized, and the hammer block 23 can be ensured to freely swing when moving, so that the driving shaft 121 and the hammer block 23 can still realize piling under the condition of non-axial movement.
The flexible sleeve 223 can absorb the impact force generated when the hammer 23 strikes the leg, thereby protecting the hammer 23.
Optionally, the top end of the hammer 23 has a closed receiving cavity 230, and the outer wall of the second transmission shaft 222 near the bottom end has an outer flange 2221, and the outer flange 2221 is slidably located in the receiving cavity 230.
The hammer assembly 2 further includes two sets of disc springs 24, the two sets of disc springs 24 are respectively located in the accommodating cavity 230 and sleeved outside the second transmission shaft 222, the two sets of disc springs 24 are respectively located on two opposite sides of the outer flange 2221, one end of each disc spring abuts against the outer flange 2221, and the other end of each disc spring abuts against the inner wall of the accommodating cavity 230.
In the above embodiment, the disc spring 24 can further absorb the counter impact force generated by the pile leg on the hammer body 23 when the hammer body 23 strikes the pile leg, thereby protecting the hammer body 23.
Optionally, the hammer block 23 includes a body hammer 231 and an end cap 232. The top end of the body hammer 231 has an open groove 2311.
The end cap 232 covers the opening of the open groove 2311 to form the accommodating cavity 230.
In the above implementation, the arrangement of the open groove 2311 can provide a mounting space for the disc spring 24 and the like, and at the same time, the end cover 232 is provided, so that the outer flange 2221 is restricted by the end cover 232 to move with the main body hammer 231 when following the second transmission shaft 222 to move upwards.
Illustratively, the end cap 232 is threadably assembled with the body hammer 231.
With continued reference to fig. 5, the hammer body 23 illustratively has connecting holes 233 therein, the connecting holes 233 respectively communicating the space on the top end side of the hammer body 23 with the space on the bottom end side of the hammer body 23.
In the above implementation, the connection holes 233 are provided to enable water on the bottom end side of the hammer body 23 to be quickly discharged through the inside of the hammer body 23 when the hammer body 23 strikes a pile leg.
Alternatively, the connection hole 233 includes a main through hole 2331 and a plurality of branch holes 2332. The main through hole 2331 has a first end penetrating the bottom end of the weight body 23 to communicate with a space on the bottom end side of the weight body 23, and a second end located inside the weight body 23.
Each branch hole 2332 is arranged along the circumference of the main through hole 2331, and a first end of the branch hole 2332 communicates with a second end of the main through hole 2331, and a second end of the branch hole 2332 extends away from the main through hole 2331, and penetrates through the side wall of the hammer block 23 to communicate with the space on the top end side of the hammer block 23.
In the above implementation, the connection hole 233 is configured in the above structure, so that water on the bottom end side of the hammer body 23 can quickly enter the hammer body 23 through the main through hole 2331 when the hammer body 23 strikes a leg, and can be quickly discharged through the branch hole 2332, thereby reducing the obstruction to the hammer body 23 and further reducing the striking energy loss.
Fig. 6 is a schematic structural diagram of a hammer block provided in an embodiment of the present disclosure, and with reference to fig. 6, to further enable water on the bottom end side of the hammer block 23 to flow quickly and reduce the loss of striking energy of the hammer block 23, for example, the outer wall of the hammer block 23 has a plurality of communication grooves 234, each communication groove 234 is arranged at intervals along the circumferential direction of the hammer block 23, each communication groove 234 corresponds to each branch hole 2332 one-to-one, a first end of each communication groove 234 communicates with a second end of the corresponding branch hole 2332, and a second end of each communication groove 234 communicates with a space on the bottom end side of the hammer block 23.
With continued reference to FIG. 5, the hammer block assembly 2 further includes a bottom housing 25 and a strike block 26.
The top end of the bottom case 25 is connected to and internally communicated with the bottom end of the hammer case 21, and the bottom end of the bottom case 25 has an inner flange 250.
The striking block 26 is movably located in the bottom case 25 in the axial direction of the connecting shaft 22, and the outer wall of the striking block 26 has an annular protrusion 263, and the outer diameter of the annular protrusion 263 is larger than the inner diameter of the inner flange 250 and the inner diameter of the hammer case 21.
The side of the striking block 26 facing the hammer body 23 is intended to abut against the hammer body 23, and the side of the striking block 26 facing away from the hammer body 23 is intended to rest on the leg 102.
In the above implementation, the striking block 26 is provided to transmit the impact of the hammer 23 to the leg, so as to prevent the hammer 23 from directly striking the leg 102, and thus the leg 102 from being deformed and damaged. The bottom case 25 is used to house the striking block 26.
With continued reference to fig. 5, for the same reason, in order to allow water between the striking block 26 and the hammer body 23 to be quickly drained at the time of striking, and to reduce striking energy consumption between the striking block 26 and the hammer body 23, the striking block 26 has a first through hole 261 therein, the first through hole 261 penetrating the top end and the bottom end of the striking block 26.
Illustratively, the interior of the striking block 26 near the bottom end thereof has a plurality of second through holes 262, the second through holes 262 are arranged along the circumference of the first through holes 261, and a first end of the second through holes 262 communicates with the first through holes 261, and a second end of the second through holes 262 penetrates the outer wall of the striking block 26 to communicate with the space on the outer wall side of the striking block 26.
In the above implementation manner, the second through holes 262 are arranged to improve the drainage efficiency of the striking block 26, so that water between the bottom end of the hammer body 23 and the top end of the striking block 26 is quickly drained through the second through holes 262 to be communicated with the outside, thereby effectively reducing the loss of striking energy and improving the piling efficiency.
In order to improve the drainage efficiency of the striking block 26, the first through-hole 261 includes a cylindrical hole 2611 and a tapered hole 2612 that communicate with each other.
A cylindrical bore 2611 is located in the striking block 26 on a side thereof adjacent the ram 23. A first end of the cylindrical bore 2611 extends through the top end of the striking block 26 and a second end of the cylindrical bore 2611 is located inside the striking block 26.
The tapered hole 2612 is located in the striking block 26 on a side away from the hammer block 23, a first end of the tapered hole 2612 extends through the bottom end of the striking block 26, a second end of the tapered hole 2612 is connected to a second end of the cylindrical hole 2611, and the inner diameter of the first end of the tapered hole 2612 is larger than that of the second end. The first ends of the second through holes 262 communicate with the tapered holes 2612, respectively.
Fig. 7 is a schematic structural diagram of a striking block provided by an embodiment of the present disclosure, and in conjunction with fig. 7, for example, in order to improve the piling efficiency, the striking block 26 includes a cylinder 264 and a cone 265, the cylinder 264 is disposed close to the hammer block 23, and the cone 265 is disposed far from the hammer block 23. The bottom end of the cylinder 264 is connected to the top end of the cone 265, the outer diameter of the bottom end of the cone 265 is larger than the outer diameter of the top end, and the bottom end of the cone 265 is used to abut against the leg 102. The cylindrical bore 2611 is located inside the cylinder 264 and the second through-hole 262 and the tapered bore 2612 are located inside the cone 265.
In the above implementation, the striking block 26 configured as above can increase the contact area with the leg by the taper 265, so as to firmly and stably strike the leg.
Illustratively, the striking block 26 is an anvil structure, so that by using the anvil as a substitute, different types of anvils can be replaced according to different leg diameters, thereby improving the piling efficiency.
Referring again to fig. 5, optionally, the hammer assembly 2 further includes a cushion sleeve 27, the cushion sleeve 27 is located in the bottom case 25, the cushion sleeve 27 is sleeved on the outer wall of the striking block 26, and two ends of the cushion sleeve 27 are clamped between the annular protrusions 263 and the bottom of the hammer case 21.
In the above implementation mode, the buffer sleeve 27 can absorb the vibration generated by the striking block 26 when being struck, so as to effectively protect the pile leg.
Fig. 8 is a schematic structural diagram of a hammer case provided in an embodiment of the present disclosure, and in combination with fig. 8, in this embodiment, the hammer case 21 is a cylindrical hollow case. The hammer case 21 has a double-layer structure, and the side wall of the hammer case 21 has a plurality of communication holes 211, and the communication holes 211 penetrate through the outer side wall and the inner side wall of the hammer case 21.
In the above implementation, the hammer case 21 has a double-layer structure, which can increase the structural strength of the hammer case 21. And the arrangement of the communication hole 211 can ensure that when the hammer body 23 moves in deep sea, water at two ends of the hammer body 23 can rapidly enter and exit the hammer shell 21 through the communication hole 211, so that the hammer shell 21 is prevented from being extruded, and the service life of the hammer shell 21 is prolonged. Meanwhile, the hammer body 23 can move more smoothly, and the obstruction of water flow to the hammer body 23 is reduced, so that the loss of striking energy of the hammer body 23 is reduced.
For example, in order to improve the structural strength of the electromagnetic pile hammer, the outer walls of the hammer case 21 near the top end and the bottom end have a plurality of first ribs 212, respectively, and the outer wall of the bottom case 25 also has a plurality of second ribs 251 (see fig. 5). The outer wall of the connecting flange 31 also has a plurality of third reinforcing beads 312 (see fig. 2).
Fig. 9 is a schematic structural diagram of a pile cap provided by an embodiment of the present disclosure, and in conjunction with fig. 9, the pile cap 101 is a cylindrical structural member, and the top end of the pile cap 101 and the bottom shell 25 are fixed together by screws, and the outer wall of the pile cap 101 has a water hole 103.
Illustratively, the pile cap 101 is a relatively long cylindrical structure, which reduces the eccentricity between the central axis of the striking block 26 and the central axis of the leg 102, to ensure that it is not convenient to pile, and to keep the pile straight.
The working mode of the electromagnetic pile driving hammer provided by the embodiment of the disclosure is briefly described as follows:
first, the electromagnetic pile driving hammer is connected to the pile cap 101 while the striking block 26 is placed on the leg 102 to be driven.
Then, the linear motor 1 is controlled such that the coil 113 in the linear motor 1 generates a corresponding magnetic field, and the driving shaft 121 moves up and down while being properly positioned.
After the adjustment is completed, the linear motor 1 is controlled again, so that the driving shaft 121 performs reciprocating motion, and the hammer body 23 is driven to generate corresponding striking energy to the striking block 26, thereby completing the piling work.
This electromagnetism pile hammer only needs two corresponding cables, has replaced that hydraulic pressure pipeline is long, and loss of pressure is big, hydraulic oil reveals the scheduling problem, this electromagnetism pile hammer green, good reliability.
The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.
Claims (10)
1. An electromagnetic pile hammer, characterized in that it comprises a linear motor (1) and a hammer block assembly (2);
the linear motor (1) comprises a stator assembly (11) and a rotor assembly (12), the stator assembly (11) comprises a sealing shell (112) and a coil (113), the coil (113) is located in the sealing shell (112) and connected with the sealing shell (112), the rotor assembly (12) comprises a driving shaft (121), and the driving shaft (121) is inserted in the coil (113) in an axially movable mode;
the hammer body assembly (2) comprises a hammer shell (21), a connecting shaft (22) and a hammer body (23), the top end of the hammer shell (21) is communicated with the bottom end of the sealing shell (112), the connecting shaft (22) can be axially movably located in the hammer shell (21), the top end of the connecting shaft (22) is connected with the bottom end of the driving shaft (121), the bottom end of the connecting shaft (22) can be axially movably inserted into the top end of the hammer body (23), and the hammer body (23) can be axially movably located in the hammer shell (21).
2. The electromagnetic pile driving hammer as claimed in claim 1, wherein the stator assembly (11) further comprises two guide bearings (114), the two guide bearings (114) are respectively located in the sealing shell (112) in a spaced manner, the outer edges of the guide bearings (114) are connected with the inner wall of the sealing shell (112), and the inner edges of the guide bearings (114) are in sliding fit with the driving shaft (121).
3. The electromagnetic pile driving hammer as set forth in claim 1, characterized in that the connecting shaft (22) comprises a first transmission shaft (221), a second transmission shaft (222) and a flexible sleeve (223);
the top end of the first transmission shaft (221) is inserted into the bottom end of the driving shaft (121);
the bottom end of the second transmission shaft (222) is inserted into the hammer body (23);
the flexible sleeve (223) is respectively sleeved on the bottom end of the first transmission shaft (221) and the top end of the second transmission shaft (222).
4. The electromagnetic pile driving hammer as set forth in claim 3, characterized in that the top end of the hammer body (23) has a closed receiving cavity (230), and the outer wall of the second transmission shaft (222) near the bottom end has an outer flange (2221), the outer flange (2221) being slidably located in the receiving cavity (230);
the hammer body assembly (2) further comprises two sets of disc springs (24), the disc springs (24) are located in the accommodating cavity (230) and sleeved outside the second transmission shaft (222), the two sets of disc springs (24) are located on two opposite sides of the outer flange (2221) respectively, one end of each disc spring abuts against the outer flange (2221), and the other end of each disc spring abuts against the inner wall of the accommodating cavity (230).
5. The electromagnetic pile driving hammer as set forth in claim 4, characterized in that the hammer body (23) comprises a body hammer (231) and an end cap (232);
the top end of the main body hammer (231) is provided with an open groove (2311);
the end cover (232) covers the opening of the open slot (2311) to form the accommodating cavity (230).
6. The electromagnetic pile driving hammer as set forth in any one of claims 1 to 5, wherein the hammer body (23) has a connection hole (233) therein, the connection hole (233) communicating a space on a side of a top end of the hammer body (23) with a space on a side of a bottom end of the hammer body (23), respectively.
7. The electromagnetic pile driving hammer as claimed in claim 6, wherein the connection hole (233) comprises a main through hole (2331) and a plurality of branch holes (2332);
the first end of the main through hole (2331) penetrates through the bottom end of the hammer body (23) to be communicated with the space on one side of the bottom end of the hammer body (23), and the second end is positioned in the hammer body (23);
each branch hole (2332) is arranged along the circumference of the main through hole (2331), a first end of each branch hole (2332) is communicated with a second end of the main through hole (2331), and a second end of each branch hole (2332) extends away from the main through hole (2331), penetrates through the side wall of the hammer body (23) and is communicated with the space on the top end side of the hammer body (23).
8. The electromagnetic pile driving hammer as claimed in claim 7, wherein the outer wall of the hammer body (23) is provided with a plurality of communication grooves (234), each communication groove (234) is arranged at intervals in the circumferential direction of the hammer body (23), each communication groove (234) corresponds to each branch hole (2332) one by one, a first end of each communication groove (234) is communicated with a second end of the corresponding branch hole (2332), and a second end of each communication groove (234) is communicated with a space on the side of the bottom end of the hammer body (23).
9. The electromagnetic pile driving hammer as set forth in any of claims 1-5, characterized in that the hammer block assembly (2) further comprises a bottom shell (25) and a striking block (26);
the top end of the bottom shell (25) is connected with the bottom end of the hammer shell (21) and the insides of the bottom shell and the hammer shell are communicated with each other, and the bottom end of the bottom shell (25) is provided with an inner flange (250);
the striking block (26) is movably located in the bottom shell (25) along the axial direction of the connecting shaft (22), an annular protrusion (263) is arranged on the outer wall of the striking block (26), and the outer diameter of the annular protrusion (263) is larger than the inner diameter of the inner flange (250) and the inner diameter of the hammer shell (21).
10. The electromagnetic pile hammer of claim 9, characterized in that the hammer block assembly (2) further comprises a cushion collar (27), the cushion collar (27) being located within the bottom case (25), and the cushion collar (27) being fitted over the outer wall of the striking block (26), both ends of the cushion collar (27) being sandwiched between the annular protrusion (263) and the bottom of the hammer case (21).
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|---|---|---|---|
| CN202110203576.8A CN113073645B (en) | 2021-02-23 | 2021-02-23 | Electromagnetic pile hammer |
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| CN202110203576.8A CN113073645B (en) | 2021-02-23 | 2021-02-23 | Electromagnetic pile hammer |
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| CN113073645B true CN113073645B (en) | 2022-08-05 |
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| CN114232584B (en) * | 2021-12-12 | 2023-12-15 | 海南浙江大学研究院 | Electromagnetic hammering head for submarine in-situ dynamic sounding equipment |
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| DE2507676A1 (en) * | 1975-02-22 | 1976-09-02 | Trapp Systemtechnik Gmbh | Pile driver with electromagnetic assistance - has ram as armature of linear motor for supergravitational acceleration |
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| CN210724374U (en) * | 2019-09-04 | 2020-06-09 | 浙江龙泰缝纫设备有限公司 | Direct-drive motor assembly body |
| CN111360285A (en) * | 2020-05-14 | 2020-07-03 | 深圳市兴旺达科技有限公司 | High-speed electric spindle |
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2021
- 2021-02-23 CN CN202110203576.8A patent/CN113073645B/en active Active
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| DE2507676A1 (en) * | 1975-02-22 | 1976-09-02 | Trapp Systemtechnik Gmbh | Pile driver with electromagnetic assistance - has ram as armature of linear motor for supergravitational acceleration |
| CN107386286A (en) * | 2017-08-31 | 2017-11-24 | 荆门创佳机械科技有限公司 | Based on linear electric motors driving without saddle piling machine |
| CN108517864A (en) * | 2018-04-25 | 2018-09-11 | 山东祺龙海洋石油钢管股份有限公司 | A kind of linear motor pile hammer |
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