CN114150666B - Electromagnetic pile driver and control method thereof - Google Patents
Electromagnetic pile driver and control method thereof Download PDFInfo
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- CN114150666B CN114150666B CN202111338349.2A CN202111338349A CN114150666B CN 114150666 B CN114150666 B CN 114150666B CN 202111338349 A CN202111338349 A CN 202111338349A CN 114150666 B CN114150666 B CN 114150666B
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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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- General Engineering & Computer Science (AREA)
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The disclosure provides an electromagnetic pile driver and a control method thereof, and belongs to the technical field of pile driving equipment. The installation shell of the electromagnetic pile driver is used as an installation foundation of the frequency converter, the current switching cabinet, the pile hammer driving component, the pile hammer braking component and the pile hammer. The driving part of the pile hammer and the braking part of the pile hammer are mainly used for driving the structure of the motor, and the motor is limited by the frequency converter and the current switching cabinet. The braking motor is guaranteed to have no current effect in the process of driving the pile hammer by the pile hammer motor, and the braking motor does not work. When the pile hammer is required to be braked, the current of the frequency converter only flows to the brake motor, and no current flows to the pile hammer motor to stop working. The possibility of mutual interference of the pile hammer motor and the brake motor is avoided, the possibility of damage of the electromagnetic pile driver is reduced, and the working safety and reliability of the electromagnetic pile driver are improved.
Description
Technical Field
The present disclosure relates to the field of pile driving devices, and in particular, to an electromagnetic pile driver and a control method thereof.
Background
The pile driver is pile driving equipment for hammering a pile body into soil, and at least comprises a pile driving hammer, a pile driving hammer driving part and a pile driving hammer braking part, wherein the pile driving hammer driving part drives the pile driving hammer to hammer the pile body into the soil, and the pile driving hammer braking part is used for braking the pile driving hammer at proper time.
The hammer brake assembly typically includes a hydraulically driven telescopic cylinder with one end facing the hammer and which is adapted to brake the hammer when extended. However, the telescopic cylinder and the driving part of the pile hammer are mutually independent, in the actual working process of the pile hammer, the telescopic cylinder is easy to start to brake the pile hammer, but the driving part of the pile hammer is still driving the pile hammer, the braking part of the pile hammer is easy to be damaged, and the overall reliability of the pile driver is lower.
Disclosure of Invention
Embodiments of the present disclosure provide an electromagnetic pile driver and a control method thereof, which can reduce the risk of damage to the pile driver to improve the reliability of the use of the pile driver. The technical scheme is as follows:
the embodiment of the disclosure provides an electromagnetic pile driver, which comprises a frequency converter, a current switching cabinet, a mounting shell, a pile hammer driving component, a pile hammer braking component and a pile hammer, wherein the pile hammer driving component, the pile hammer braking component and the pile hammer are all connected with the mounting shell,
the output end of the frequency converter is communicated with the input end of the current switching cabinet, the output end of the current switching cabinet is respectively communicated with the driving component of the piling hammer and the braking component of the piling hammer, the current switching cabinet is used for controlling the output current of the frequency converter to only flow to the driving component of the piling hammer or only flow to the braking component of the piling hammer,
the driving part of the piling hammer comprises a piling hammer motor connected with the installation shell, a piling hammer stator of the piling hammer motor is connected with the current switching cabinet and the installation shell, one end of a rotor of the piling hammer motor is connected with the piling hammer, the braking part of the piling hammer comprises a braking motor connected with the installation shell, a braking stator of the braking motor is connected with the current switching cabinet and the installation shell, and a rotor of the braking motor is used for braking the piling hammer.
Optionally, the piling hammer motor further comprises a friction plate, wherein the friction plate is coaxially connected to one end of the brake rotor, which is close to the piling hammer, and the diameter of the friction plate is larger than that of the brake rotor.
Optionally, the current switching cabinet comprises a relay or a processor.
Optionally, the pile hammer braking component further comprises a braking connecting rod, the braking connecting rod is coaxially connected with the other end of the rotor of the pile hammer motor, the braking motor is a linear motor, and one end of the braking rotor of the braking motor is opposite to the braking connecting rod.
Optionally, the pile hammer braking part further comprises a bolt motor and a positioning bolt rod, wherein the bolt motor is a linear motor, the peripheral wall of the braking connecting rod is provided with a plurality of pin holes distributed along the axial direction of the braking connecting rod at intervals, a bolt stator of the bolt motor is connected with the installation shell, a bolt rotor of the bolt motor is coaxially connected with the positioning bolt rod, and one end of the positioning bolt rod, which is far away from the bolt motor, is opposite to the peripheral wall of the braking connecting rod.
Optionally, the diameter of the pin hole is 1.8-3.5 times of the diameter of the positioning bolt rod.
Optionally, the braking stator and the bolt stator are all in a tubular shape and are coaxially distributed at intervals, the braking rotor is coaxially and slidably inserted in the braking stator, the braking rotor is provided with a coaxial sliding hole, the positioning bolt rod is coaxially and slidably inserted in the sliding hole, and one end of the positioning bolt rod, which is far away from the braking connecting rod, is coaxially connected with the bolt rotor.
Optionally, the pile hammer braking part further comprises a first insulating protection layer and a second insulating protection layer, wherein the first insulating protection layer is coaxially connected with one end, close to the plug pin stator, of the braking stator, and the second insulating protection layer is coaxially connected with one end, close to the braking stator, of the plug pin stator.
The embodiment of the disclosure provides an electromagnetic pile driver control method, which is implemented by adopting the electromagnetic pile driver as described above, and comprises the following steps:
the frequency converter of the electromagnetic pile driver and the current switching cabinet are enabled to transmit current to the pile driving hammer motor of the pile driving hammer driving part only, and a rotor of the pile driving hammer motor drives the pile driving hammer of the electromagnetic pile driving hammer to work;
the frequency converter of the electromagnetic pile driver and the current switching cabinet are enabled to transmit current to the braking motor of the pile hammer braking component only, and the pile hammer motor is powered off;
the braking motor brakes the pile hammer.
Optionally, the piling hammer brakes the piling hammer, including:
and according to the working speed and the working position of the pile hammer, the active cell of the braking motor applies acting force to the pile hammer so as to brake the pile hammer.
The technical scheme provided by the embodiment of the disclosure has the beneficial effects that at least:
the installation shell of the electromagnetic pile driver is used as an installation foundation of the frequency converter, the current switching cabinet, the pile hammer driving component, the pile hammer braking component and the pile hammer. The frequency converter is matched with the current switching cabinet, so that the output current of the frequency converter can be controlled to only flow to the driving part of the pile hammer or to only flow to the braking part of the pile hammer. Meanwhile, the driving parts of the piling hammer and the driving parts of the piling hammer are mainly used for driving the motor structures, so that the braking motor used for braking in the driving parts of the piling hammer and the piling hammer motor used for driving the piling hammer in the driving parts of the piling hammer can be ensured to be limited by the frequency converter and the current switching cabinet. The braking motor is guaranteed to have no current effect in the process of driving the pile hammer by the pile hammer motor, and the braking motor does not work. When the pile hammer is required to be braked, the current of the frequency converter only flows to the brake motor, and no current flows to the pile hammer motor to stop working. The possibility of mutual interference of the pile hammer motor and the brake motor is avoided, the possibility of damage of the electromagnetic pile driver is reduced, and the working safety and reliability of the electromagnetic pile driver are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of an electromagnetic pile driver provided by an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a current switching cabinet provided in an embodiment of the present disclosure;
FIG. 3 is a schematic view of a portion of an electromagnetic pile driver provided by an embodiment of the present disclosure;
FIG. 4 is a flow chart of a method of controlling an electromagnetic pile driver provided by an embodiment of the present disclosure;
fig. 5 is a flowchart of another control method of the electromagnetic pile driver provided by an embodiment of the present disclosure.
Detailed Description
For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details of the embodiments of the present disclosure will be described with reference to the accompanying drawings.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," "third," and the like in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", "top", "bottom" and the like are used only to indicate relative positional relationships, which may be changed accordingly when the absolute position of the object to be described is changed.
For ease of understanding, fig. 1 is provided herein for illustration, fig. 1 is a schematic structural diagram of an electromagnetic pile driver provided in an embodiment of the disclosure, and referring to fig. 1, it can be seen that the embodiment of the disclosure provides an electromagnetic pile driver including a frequency converter 1, a current switching cabinet 2, a mounting case 3, and a pile hammer driving part 4, a pile hammer braking part 5, and a pile hammer 6 all connected to the mounting case 3.
The output end of the frequency converter 1 is communicated with the input end of the current switching cabinet 2, the output end of the current switching cabinet 2 is respectively communicated with the piling hammer driving component 4 and the piling hammer braking component 5, and the current switching cabinet 2 is used for controlling the output current of the frequency converter 1 to only flow to the piling hammer driving component 4 or only flow to the piling hammer braking component 5.
The driving part 4 of the piling hammer comprises a piling hammer motor 41 connected with the installation shell 3, a piling hammer stator 411 of the piling hammer motor 41 is connected with the current switching cabinet 2 and the installation shell 3, one end of a piling hammer rotor 412 of the piling hammer motor 41 is connected with the piling hammer 6, the braking part 5 of the piling hammer comprises a braking motor 51 connected with the installation shell 3, a braking stator 511 of the braking motor 51 is connected with the current switching cabinet 2 and the installation shell 3, and the rotor of the braking motor 51 is used for braking the piling hammer 6.
The installation shell 3 of the electromagnetic pile driver is used as an installation foundation of the frequency converter 1, the current switching cabinet 2, the pile hammer driving part 4, the pile hammer braking part 5 and the pile hammer 6. The frequency converter 1 is matched with the current switching cabinet 2, so that the output current of the frequency converter 1 can be controlled to flow to only the driving part 4 of the pile hammer or flow to only the braking part 5 of the pile hammer. Meanwhile, the driving structures of the driving part 4 and the driving brake part 5 are motor structures, so that the brake motor 51 for braking in the driving brake part 5 and the driving motor 41 for driving the driving hammer 6 in the driving part 4 are limited by the frequency converter 1 and the current switching cabinet 2. It is ensured that the brake motor 51 does not act with current during driving of the hammer 6 by the hammer motor 41, and that the brake motor 51 does not work. When the hammer 6 needs to be braked, the current of the inverter 1 flows only to the brake motor 51, and no current flows to the hammer motor 41 to stop the operation. The possibility of mutual interference of the piling hammer motor 41 and the brake motor 51 is avoided, the possibility of damage of the electromagnetic piling machine is reduced, and the working safety and reliability of the electromagnetic piling machine are improved.
The power of the hammer motor 41 and the brake motor 51 are derived from the current output from the inverter 1, and if there is no current output from the inverter 1, the hammer motor 41 and the brake motor 51 are in a standby state. In fig. 1, the power supply switching cabinet and the frequency converter 1 are divided into the outside of the installation shell 3, the power supply switching cabinet, the frequency converter 1 and the installation shell 3 are distributed at intervals, and the frequency converter 1 and the power supply switching cabinet can be actually installed in the installation shell 3.
Also illustrated in fig. 1 is a steel pile, the drawing of which is identified as 100.
Alternatively, the mounting case 3 may include a cylindrical body, and the cross section of the cylindrical body may be annular. Is convenient for preparation and installation.
In other implementations provided by the present disclosure, the mounting case 3 may be of other shapes or prepared in an openable and closable shape, and the cross section of the mounting case 3 may be rectangular or of other irregular shape, which the present disclosure is not limited to.
Alternatively, the stator of each motor provided in the present disclosure and the mounting case 3 may be connected by bolts or mating connection plates. The present disclosure is not limited in this regard.
It should be noted that, insulation protection measures are added between the stator and the mounting case 3. For example, the stator is sleeved with an insulating ring, and the insulating ring is connected with the mounting shell 3 through a connecting piece. The use safety of the electromagnetic pile driver can be ensured.
For ease of understanding, a schematic diagram of the current switching cabinet 2 is provided herein, fig. 2 and fig. 2 are schematic diagrams of the current switching cabinet provided in the embodiments of the present disclosure, referring to fig. 2, it can be understood that the current switching cabinet 2 may include a box 21 and a first switch 22, a second switch 23 and a third switch 24 inside the box 21, where the first switch 22 is connected to an output end of the frequency converter 1, the second switch 23 is connected to the third switch 24 in parallel on the first switch 22, and the second switch 23 and the third switch 24 are connected to a stator of the piling hammer motor 41 and a stator of the brake motor 51, respectively.
The principle of the current switching cabinet 2 is as described above, the first switch 22 may be turned on to cut off the connection between the inverter 1 and the hammer motor 41 and the brake motor 51, or the first switch 22 may be turned on to control the opening and closing of the second switch 23 and the third switch 24, so as to control the currents flowing into the hammer motor 41 and the brake motor 51, respectively. The current switching cabinet 2 controls only one of the second switch 23 or the third switch 24 to be turned on all the time so as to realize mutual exclusion of the working states of the piling hammer motor 41 and the brake motor 51.
It should be noted that, the closing condition of the second switch 23 and the third switch 24 may be detected and controlled by the processor in combination with the sensor.
Alternatively, the current switching cabinet 2 may also comprise a relay or a processor.
The current switching cabinet 2 comprises a relay or a processor, and can conveniently realize switching and control of current.
Fig. 3 is a schematic view of a portion of an electromagnetic pile driver according to an embodiment of the present disclosure, and referring to fig. 3, it can be seen that the pile hammer motor 41 may further include a friction plate 413, where the friction plate 413 is coaxially connected to an end of the brake rotor 512 near the pile hammer 6, and a diameter of the friction plate 413 is larger than a diameter of the brake rotor 512.
The friction plate 413 is added at one end of the brake rotor 512 close to the pile hammer 6, and the diameter of the friction plate 413 is larger than that of the brake rotor 512, so that the braking effect of the brake motor 51 on the pile hammer 6 can be improved, the brake motor 51 can be ensured to stably brake the pile hammer 6, the braking time is shortened, and the use efficiency of the electromagnetic pile driver is improved.
Illustratively, the material of friction plate 413 may be a resin-based friction material, a carbon fiber friction material, or a semi-metallic friction material.
The material of the friction plate 413 is selected in the above range, so that the friction plate 413 can effectively brake the pile hammer 6, and meanwhile, the manufacturing cost of the friction plate 413 is not excessively high.
Optionally, the hammer brake part 5 further includes a brake connecting rod 513, the brake connecting rod 513 is coaxially connected to the other end of the mover of the hammer motor 41, the brake motor 51 is a linear motor, and one end of the brake mover 512 of the brake motor 51 faces the brake connecting rod 513.
The brake connecting rod 513 is added, the brake connecting rod 513 is coaxially connected with the piling hammer 6, and the brake connecting rod 513 is a force application object of the brake motor 51, so that abrasion of the piling hammer 6 can be reduced, the use strength of the piling hammer 6 is ensured, and the service life of the piling hammer 6 is prolonged.
Optionally, the hammer brake part 5 further includes a latch motor 52, which is a linear motor, and a positioning latch rod 53, the peripheral wall of the brake connecting rod 513 has a plurality of pin holes 5131 spaced along the axial direction of the brake connecting rod 513, a latch stator 522 of the latch motor 52 is connected to the mounting case 3, a latch rotor 521 of the latch motor 52 is coaxially connected to the positioning latch rod 53, and an end of the positioning latch rod 53 remote from the latch motor 52 is opposite to the peripheral wall of the brake connecting rod 513.
The bolt motor 52 in the form of a linear motor is added, the bolt rotor 521 of the bolt motor 52 can axially stretch and retract to be matched with the positioning bolt rod 53 coaxially connected with the bolt rotor 521, the positioning bolt rod 53 also axially moves in the axial stretch and retract movement process of the bolt rotor 521, and can enter the pin hole 5131 on the brake connecting rod 513 to play a positioning role on the brake connecting rod 513 and the pile hammer 6, and the pile hammer 6 is locked to avoid the working state of the pile hammer 6 from being changed by external force. The use safety and reliability of the electromagnetic pile hammer 6 are improved.
It should be noted that, in the implementation provided in the present disclosure, the piling hammer motor 41, the brake motor 51, and the latch motor 52 are all tubular linear motors. In other implementations provided by the present disclosure, the hammer motor 41, the brake motor 51, and the latch motor 52 may also be provided as other forms of linear motors, which the present disclosure is not limited to.
Illustratively, the stator of the latch motor 52 may also be connected to the output of the current switching cabinet 2, and the current power of the latch motor 52 is derived only from the frequency converter 1.
The power of the bolt motor 52, the brake motor 51 and the piling hammer motor 41 is derived from the frequency converter 1, so that the piling hammer motor 41 and other motors can not work simultaneously, interference can not be generated between the motors, the possibility of damage of the electromagnetic piling machine due to mutual interference of the motors is reduced, and the use safety and reliability of the electromagnetic piling machine are improved.
With reference to fig. 2, with the addition of the latch motor 52, a fourth switch 25 and a fifth switch 26 for connecting the latch motor 52 and the brake motor 51, respectively, may be added between the third switch 24 and the hammer driving part 4.
The cooperation of the processor and the sensor can also prevent the bolt motor 52 and the brake motor 51 from interfering with each other, so that the use safety and reliability of the electromagnetic pile driver are further improved.
In other implementations provided by the present disclosure, latch motor 52 may also be self-powered, as this disclosure is not limiting.
Alternatively, the diameter of the pin hole 5131 is 1.8 to 3.5 times the diameter of the detent pin lever 53.
The ratio of the diameter of the pin hole 5131 to the diameter of the detent pin rod 53 is within the above range, so that it is ensured that the pin hole 5131 has enough space to enter the detent pin rod 53, and the gap between the pin hole 5131 and the detent pin rod 53 is not too large to weaken the locking effect on the piling hammer 6 and the brake connecting rod 513.
Illustratively, the brake stator 511 and the latch stator 522 are both in a tubular shape and are coaxially spaced apart, the brake rotor 512 is coaxially and slidably inserted into the brake stator 511, the brake rotor 512 has a coaxial sliding hole, the positioning latch rod 53 is coaxially and slidably inserted into the sliding hole, and an end of the positioning latch rod 53 away from the brake connecting rod 513 is coaxially connected to the latch rotor 521.
The brake stators 511 are coaxial with the latch stators 522 and are spaced apart, and the brake rotors 512 in the brake stators 511 can move normally axially to effect braking of the brake connecting rods 513. The positioning pin rod 53 is slidably inserted inside the pin stator 522, and one end of the positioning pin rod 53, which is far from the brake link 513, is connected to the pin mover 521 inside the pin stator 522. On the one hand, space can be saved, on the other hand, the final braking stopping position of the braking rotor 512 can be controlled to be located at the braking connecting rod 513, the positioning bolt rod 53 can directly extend into the pin hole 5131 of the braking connecting rod 513, and the positions of the braking rotor 512 and the bolt rotor 521 do not need to be monitored at the same time in the axial direction of the pile hammer 6, so that the workload of a processor can be reduced, the precision requirement of the processor can be reduced, and the manufacturing cost of the electromagnetic pile driver can be reduced.
On the premise that the friction plate 413 is provided at the end of the brake rotor 512, the friction plate 413 has a relief hole coaxial with the slide hole for passing the positioning pin 53.
Alternatively, the axes of the braking stator 511 and the latch stator 522 are located in the radial direction of the braking connecting rod 513, so that stable braking of the piling hammer 6 can be ensured.
Illustratively, the minimum distance between the detent stator 511 and the latch stator 522 may be 5mm to 35mm.
The minimum distance between the braking stator 511 and the latch stator 522 is within the above range, so that the braking stator 511 and the latch stator 522 can be ensured to be in an insulating state, and the space in the installation housing 3 is not occupied.
Optionally, the hammer brake part 5 further includes a first insulation protection layer 54 and a second insulation protection layer 55, where the first insulation protection layer 54 is coaxially connected to an end of the brake stator 511 near the latch stator 522, and the second insulation protection layer 55 is coaxially connected to an end of the latch stator 522 near the brake stator 511.
The addition of the first insulating protection layer 54 and the second insulating protection layer 55 can further improve the use safety of the braking stator 511 and the pin stator 522, reduce the possibility of conducting or affecting each other between the braking stator 511 and the pin stator 522, and improve the use safety and reliability of the electromagnetic pile driver as a whole.
For example, in the electromagnetic pile driver, at least two brake motors 51 and latch motors 52 may be provided, and the brake electrodes are in one-to-one correspondence with the latch motors 52. At least two brake motors 51 are equally spaced apart along the circumference of the brake connecting rod 513.
At least two braking motors 51 are in one-to-one correspondence with at least two bolt motors 52, and at least two braking motors 51 are equidistantly distributed along the circumferential direction of the braking connecting rod 513, so that the braking effect on the braking connecting rod 513 and the piling hammer 6 can be improved, and the braking efficiency can be improved.
Only two brake motors 51 and two latch motors 52 are illustrated in fig. 3. In other implementations provided in the present disclosure, the number of brake motors 51 and latch motors 52 may also be set to 3 or 4 or 6. The present disclosure is not limited in this regard.
Referring to fig. 3, the hammer driving part 4 may further include a first displacement sensor 42, and the first displacement sensor 42 is configured to detect the displacement of the hammer 6.
The addition of the first displacement sensor 42 can monitor the actual displacement of the pile hammer 6 in real time, and the braking force of the braking motor 51 can be controlled according to the data of the first displacement sensor 42. The situation that the braking force is too large or too small is reduced, and the use safety and reliability of the electromagnetic pile driver are improved.
Illustratively, the hammer brake part 5 may further include a second displacement sensor 56 for detecting displacement of the brake mover 512 and a third displacement sensor 57 for detecting displacement of the latch mover 521, the second displacement sensor 56 being configured to detect displacement of the latch mover 57.
The addition of the second displacement sensor 56 and the third displacement sensor 57 can facilitate control of the braking effect and the locking effect.
Fig. 4 is a flowchart of a control method of an electromagnetic pile driver provided by an embodiment of the present disclosure, and as can be seen with reference to fig. 4, the embodiment of the present disclosure provides a control method of an electromagnetic pile driver, where the control method of an electromagnetic pile driver is implemented by using an electromagnetic pile driver as described above, and the control method of an electromagnetic pile driver includes:
s101: the frequency converter and the current switching cabinet of the electromagnetic pile driver only transmit current to the pile driving hammer motor of the pile driving hammer driving component, and the rotor of the pile driving hammer motor drives the pile driving hammer of the electromagnetic pile driving hammer to work.
S102: the frequency converter and the current switching cabinet of the electromagnetic pile driver only transmit current to the braking motor of the pile hammer braking component, and the pile hammer motor is powered off.
S103: the braking motor brakes the pile hammer.
The installation shell of the electromagnetic pile driver is used as an installation foundation of the frequency converter, the current switching cabinet, the pile hammer driving component, the pile hammer braking component and the pile hammer. The frequency converter is matched with the current switching cabinet, so that the output current of the frequency converter can be controlled to only flow to the driving part of the pile hammer or to only flow to the braking part of the pile hammer. Meanwhile, the driving parts of the piling hammer and the driving parts of the piling hammer are mainly used for driving the motor structures, so that the braking motor used for braking in the driving parts of the piling hammer and the piling hammer motor used for driving the piling hammer in the driving parts of the piling hammer can be ensured to be limited by the frequency converter and the current switching cabinet. The braking motor is guaranteed to have no current effect in the process of driving the pile hammer by the pile hammer motor, and the braking motor does not work. When the pile hammer is required to be braked, the current of the frequency converter only flows to the brake motor, and no current flows to the pile hammer motor to stop working. The possibility of mutual interference of the pile hammer motor and the brake motor is avoided, the possibility of damage of the electromagnetic pile driver is reduced, and the working safety and reliability of the electromagnetic pile driver are improved.
Fig. 5 is a flowchart of another control method of the electromagnetic pile driver according to the embodiment of the present disclosure, in which the electromagnetic pile driver shown in fig. 3 is used as a controlled device, and referring to fig. 5, it can be known that the control method of the electromagnetic pile driver may further include:
s201: the frequency converter and the current switching cabinet of the electromagnetic pile driver only transmit current to the pile driving hammer motor of the pile driving hammer driving component, and the rotor of the pile driving hammer motor drives the pile driving hammer of the electromagnetic pile driving hammer to work.
S202: the frequency converter and the current switching cabinet of the electromagnetic pile driver only transmit current to the braking motor of the pile hammer braking component, and the pile hammer motor is powered off.
S203: and according to the working speed and the working position of the pile hammer, the active cell of the braking motor applies acting force to the braking connecting rod so as to brake the pile hammer connected with the braking connecting rod.
In step S203, when the pile hammer needs to be braked, the speed of the pile hammer at the moment of power failure of the pile hammer motor can be obtained through the pile hammer motor; acquiring the position of a pile hammer at the moment of power failure of a pile hammer motor through a first displacement sensor; obtaining the distance between the brake rotor and the pin hole according to the position of the pile hammer and the position of the brake rotor, wherein the distance is the distance in the axial direction of the pile hammer; determining acting force exerted by the brake rotor on the brake connecting rod according to the speed of the pile hammer and the distance between the brake rotor and the pin hole; the brake rotor applies a force on the brake link to brake the pile hammer.
By adopting the steps, the distance between the brake rotor and the pin hole can be effectively controlled, and the work of the positioning bolt rod coaxial with the brake rotor is facilitated.
Illustratively, the speed of the piling hammer is 3.5-5.2 m/s, the distance between the brake rotor and the pin hole is 30-85 mm, and the acting force exerted by the brake rotor on the brake connecting rod is 21-27N. Can ensure the stable braking of the positioning bolt rod.
S204: the positioning bolt rod is controlled to be inserted into the pin hole on the brake connecting rod so as to lock the piling hammer.
The foregoing disclosure is not intended to be limited to any form of embodiment, but is not intended to limit the disclosure, and any simple modification, equivalent changes and adaptations of the embodiments according to the technical principles of the disclosure are intended to be within the scope of the disclosure, as long as the modifications or equivalent embodiments are possible using the technical principles of the disclosure without departing from the scope of the disclosure.
Claims (10)
1. An electromagnetic pile driver is characterized by comprising a frequency converter (1), a current switching cabinet (2), a mounting shell (3), a pile hammer driving component (4), a pile hammer braking component (5) and a pile hammer (6) which are all connected with the mounting shell (3),
the output end of the frequency converter (1) is communicated with the input end of the current switching cabinet (2), the output end of the current switching cabinet (2) is respectively communicated with the piling hammer driving component (4) and the piling hammer braking component (5), the current switching cabinet (2) is used for controlling the output current of the frequency converter (1) to only flow to the piling hammer driving component (4) or only flow to the piling hammer braking component (5),
the driving component (4) comprises a driving motor (41) connected with the mounting shell (3), a driving motor stator (411) of the driving motor (41) is connected with the current switching cabinet (2) and the mounting shell (3), one end of a rotor of the driving motor (41) is connected with the driving hammer (6), the driving motor braking component (5) comprises a braking motor (51) connected with the mounting shell (3), and a braking stator (511) of the braking motor (51) is connected with the current switching cabinet (2) and the mounting shell (3), and the rotor of the braking motor (51) is used for braking the driving hammer (6).
2. Electromagnetic pile driver according to claim 1, characterized in that the pile hammer motor (41) further comprises a friction plate (413), the friction plate (413) being coaxially connected to the brake rotor (512) of the brake motor (51) at an end close to the pile hammer (6), the diameter of the friction plate (413) being larger than the diameter of the brake rotor (512).
3. Electromagnetic pile driver according to claim 1, characterized in that the current switching cabinet (2) comprises a relay or a processor.
4. An electromagnetic pile driver according to any one of claims 1-3, characterised in that the pile hammer brake part (5) further comprises a brake connecting rod (513), the brake connecting rod (513) is coaxially connected with the other end of the rotor of the pile hammer motor (41), the brake motor (51) is a linear motor, and one end of the brake rotor (512) of the brake motor (51) is opposite to the brake connecting rod (513).
5. The electromagnetic pile driver according to claim 4, characterized in that the pile hammer braking part (5) further comprises a bolt motor (52) which is a linear motor and a positioning bolt rod (53), the peripheral wall of the braking connecting rod (513) is provided with a plurality of pin holes (5131) which are distributed at intervals along the axial direction of the braking connecting rod (513), a bolt stator (522) of the bolt motor (52) is connected with the mounting shell (3), a bolt rotor (521) of the bolt motor (52) is coaxially connected with the positioning bolt rod (53), and one end of the positioning bolt rod (53) which is far away from the bolt motor (52) is opposite to the peripheral wall of the braking connecting rod (513).
6. Electromagnetic pile driver according to claim 5, characterized in that the diameter of the pin hole (5131) is 1.8-3.5 times the diameter of the positioning pin rod (53).
7. Electromagnetic pile driver according to claim 5, characterized in that the brake stator (511) and the latch stator (522) are all tubular and coaxially spaced apart, the brake rotor (512) is coaxially and slidably inserted in the brake stator (511), the brake rotor (512) has a coaxial sliding hole, the positioning latch rod (53) is coaxially and slidably inserted in the sliding hole, and the end of the positioning latch rod (53) remote from the brake connecting rod (513) is coaxially connected with the latch rotor (521).
8. The electromagnetic pile driver according to claim 6, characterized in that the pile hammer brake part (5) further comprises a first insulation shield (54) and a second insulation shield (55), the first insulation shield (54) being coaxially connected to the brake stator (511) at an end close to the plug stator (522), the second insulation shield (55) being coaxially connected to the plug stator (522) at an end close to the brake stator (511).
9. An electromagnetic pile driver control method, characterized in that the electromagnetic pile driver control method is realized by adopting the electromagnetic pile driver according to any one of claims 1-8, the electromagnetic pile driver comprises a frequency converter (1), a current switching cabinet (2), a mounting shell (3) and a pile driving component (4), a pile driving brake component (5) and a pile driving hammer (6) which are all connected with the mounting shell (3), the output end of the frequency converter (1) is communicated with the input end of the current switching cabinet (2), the output end of the current switching cabinet (2) is respectively communicated with the pile driving component (4) and the pile driving brake component (5), the current switching cabinet (2) is used for controlling the output current of the frequency converter (1) to flow only to the pile driving component (4) or only to the pile braking component (5), the pile driving component (4) comprises a pile driving motor (motor) connected with the mounting shell (3), the output end of the frequency converter (2) is respectively communicated with the pile driving drive component (4) and the pile braking component (5), the pile driving motor (41) is connected with the pile driving motor (6), the pile driving motor (41) is connected with the pile driving motor (3), the pile driving motor (4) is connected with the pile driving motor (3), the braking stator (511) of the braking motor (51) is connected with the current switching cabinet (2) and the installation shell (3), the rotor of the braking motor (51) is used for braking the pile hammer (6), and the electromagnetic pile driver control method comprises the following steps:
the frequency converter of the electromagnetic pile driver and the current switching cabinet are enabled to transmit current to the pile driving hammer motor of the pile driving hammer driving part only, and a rotor of the pile driving hammer motor drives the pile driving hammer of the electromagnetic pile driving hammer to work;
the frequency converter of the electromagnetic pile driver and the current switching cabinet are enabled to transmit current to the braking motor of the pile hammer braking component only, and the pile hammer motor is powered off;
the braking motor brakes the pile hammer.
10. The electromagnetic pile driver control method of claim 9, wherein the braking motor brakes the pile hammer, comprising:
and according to the working speed and the working position of the pile hammer, the active cell of the braking motor applies acting force to the pile hammer so as to brake the pile hammer.
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| CN202111338349.2A CN114150666B (en) | 2021-11-11 | 2021-11-11 | Electromagnetic pile driver and control method thereof |
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| CN202111338349.2A CN114150666B (en) | 2021-11-11 | 2021-11-11 | Electromagnetic pile driver and control method thereof |
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| CN114150666A (en) | 2022-03-08 |
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