Device and method for connecting or disconnecting a drill rod and a power head of a pile forming machine

Abstract

The present invention discloses a device and method for connecting or disconnecting a drill rod and a power head of a pile driver, comprising a columnar support body, the upper end of which is a joint for plugging and fixing with the power head on the ground, the lower end of which is a sleeve coaxial with the joint and used to fit the top of the drill rod, a support frame fixedly connected to the columnar support body, two linear telescopic mechanisms on the support frame, the telescopic rod of the linear telescopic mechanism is used to plug into the first through hole of the sleeve wall, the radial slot at the top of the drill rod and the second through hole of the sleeve wall to fix or disconnect, the linear telescopic mechanism is electrically connected to a main controller arranged on the support frame, a remote controller is also included, the transmitter of the remote controller is operated by ground personnel, and a lifting lug and a steel wire rope are also included for vertically hanging the drill rod just below the center hole of the sleeve to facilitate mutual connection. By adopting the device and method, the drill rod and the power head can be plugged and fixed or pulled out and disconnected without manual climbing to a height of several tens of meters.

Description

Technical Field

[0001] The invention relates to the technical field of pile foundation construction equipment, in particular to a device and method for connecting or disconnecting a drill rod and a power head of a bored pile driver. Background Art

[0002] With the rapid development of urban construction, the number of high-rise and super-high-rise buildings is increasing. The taller the building, the deeper the pile foundation, which in turn requires a longer drill rod. However, due to considerations of drilling rig stability and safety, the drill rod length must be limited. Therefore, generally speaking, drilling a hole, such as one about 70 meters deep, requires at least two drill rods. Traditional pile drivers, or drilling rigs, with a single power head require manual climbing up and down two or three times to connect and disconnect the bolts, up to a height of approximately 35 meters.

[0003] Later, technicians installed two power heads on a drilling rig, which were connected to the first drill rod and the second drill rod respectively. The two drill rods can be connected and disconnected from each other at a height of about 1 meter above the ground. In addition, since the first drill rod, such as the spiral drill rod, is usually installed on the first power head when the pile driver leaves the factory, if two drill rods are used to drill a hole about 70 meters deep, the first drill rod does not need to be connected and disassembled on site, thus reducing the number of times manual climbing to a height of about 35 meters.

[0004] However, in the prior art, due to the following situations, it is still necessary to manually climb up to a height of several tens of meters to plug in or disconnect the plug, that is, to pull out the plug to replace the drill rod: 1. Initial connection of the second drill rod and the second power head; 2. Replacing the second drill rod of different lengths according to the drilling depth; 3. Using several short drill rods and connecting them together to form a second drill rod; 4. Replacing the first drill rod of different lengths according to the drilling depth; 5. Using several short drill rods and connecting them together to form a first drill rod. In other words, in the prior art, the connection between the drill rod and the power head still requires manual climbing up to several tens of meters, which is not only unsafe, but also labor-intensive for the operators and has low construction efficiency. The above-mentioned technical difficulties have not been properly resolved to date. Summary of the Invention

[0005] A technical problem to be solved by the present invention is to provide a device for connecting or disconnecting a drill rod and a power head of a pile driver, which can realize plugging, fixing, pulling out and disconnecting of the drill rod and the power head without manual climbing of dozens of meters.

[0006] A technical solution of the present invention is to provide a device for connecting or disconnecting the drill rod of a pile driver with a power head.

[0007] The cylindrical support comprises a connecting head at the upper end thereof for being plugged and fixed with the power head on the ground, a sleeve at the lower end thereof being coaxial with the connecting head and for fitting the top end of the drill pipe, and a support frame being fixedly connected to the cylindrical support.

[0008] The support frame is provided with at least one linear telescopic mechanism, the telescopic rod of the linear telescopic mechanism being used to be inserted into the first through hole of the sleeve wall, the radial slot at the top end of the drill rod, and the second through hole of the sleeve wall for fixing or disengaging, and the linear telescopic mechanism is electrically connected to a main controller provided on the support frame;

[0009] The linear telescopic mechanism is electrically connected to a battery provided on the support frame and providing a DC power supply via a power on-off switch, and the power on-off switch is electrically connected to a main controller;

[0010] A device for connecting or disconnecting the drill rod of a pile driver to a power head, further comprising a remote controller, wherein a receiving portion of the remote controller is disposed on the support frame and electrically connected to the main controller, and a transmitting portion of the remote controller is operated by ground personnel;

[0011] The device for connecting or disconnecting the drill rod of the bored pile driver and the power head also includes a plurality of first lifting ears fixedly connected to the lower end of the sleeve. The plurality of first lifting ears are used to be fixedly connected to the plurality of second lifting ears at the upper end of the drill rod via wire ropes so as to vertically hang the drill rod directly below the center hole of the sleeve to facilitate mutual socketing.

[0012] After adopting the above structure, the device for connecting or disconnecting the drill rod of a pile driver of the present invention from the power head has the following advantages: after installing the device on the power head, no matter what situation is encountered, such as any of the five situations described above, there is no need to manually climb to a height of several dozen meters. Instead, a worker can operate the transmitting part of the remote control on the ground to plug in the pin to connect, i.e., plug and fix, or disconnect the drill rod from the power head, thereby facilitating the replacement of the drill rod. The device for connecting or disconnecting the drill rod of a pile driver of the present invention from the power head of the present invention avoids the need for manual climbing to a height of several dozen meters for operation. A worker can operate the remote control on the ground to connect, i.e., plug and fix, or pull out the plug to disconnect the drill rod from the power head. This not only ensures the personal safety of the workers, but also greatly reduces the labor intensity of the workers, and greatly improves the construction efficiency, thereby solving the technical problems that have plagued the field for many years and have never been properly solved.

[0013] Furthermore, the linear telescopic mechanism is a hydraulic cylinder, and the telescopic rod is a piston rod. The hydraulic cylinder is connected to a hydraulic power unit providing power via multiple pipes and multiple solenoid valves, and the solenoid valves are electrically connected to a main controller. The battery is a storage battery, which is connected to a DC motor in the hydraulic power unit via a power on / off switch, and the power on / off switch is electrically connected to the main controller. With this structure, the linear telescopic mechanism is simple in structure and operates stably and reliably, with a very low failure rate and a high insertion and extraction rate. This further ensures that the drill rod and power head can be connected, fixed, or disconnected from the ground by operating a remote control, without having to manually climb dozens of meters to operate.

[0014] Furthermore, the device for connecting or disconnecting the drill rod of a pile driver to a power head of the present invention further includes a power display unit mounted on the support frame. The power display screen of the power display unit is located in a position visible to the human eye when the device is lowered to the ground, and the power display unit is electrically connected to the battery. With this structure, the remaining power can be checked regularly to ensure that the device is always in the required power supply state.

[0015] Furthermore, the device for connecting or disconnecting the drill rod of a bored pile driver to a power head of the present invention also includes a displacement control unit and a displacement status indicator. With this structure, the telescopic rod of a linear telescopic mechanism, such as the piston rod of a hydraulic cylinder, can be stopped as soon as it is plugged into place. Of course, the main controller can control the telescopic rod to retract into place, i.e., shut off the power supply, thereby stopping the movement, based on a preset telescopic rod retraction time. This can achieve the effect of controlling the telescopic rod to extend into place and shut off the power supply, thereby stopping the movement, based on a preset telescopic rod extension time. However, with this specific structure, the stop-at-arrival control is more accurate and intuitive, making it easier for workers to operate and control.

[0016] Furthermore, the displacement control unit is a travel switch mounted on the hydraulic cylinder or support frame, and the displacement status indicator is an indicator light mounted on the hydraulic cylinder or support frame. The travel switch contact structure is connected to the piston rod via a lever and a pull cord, and both the travel switch and the indicator light are electrically connected to the main controller. The displacement control unit employing this specific structure is easy to install and does not interfere with the extension and retraction of the piston rod. Furthermore, the connection structure in which the pull cord drives the lever to disconnect the contact points of the travel switch contact structure once the piston rod is axially extended into position is more accurate, timely, stable, and reliable. The indicator light also provides a clear, simple, and reliable prompt.

[0017] Furthermore, the support frame includes a circular support plate for supporting the hydraulic power unit and battery, and a rectangular support plate for supporting the hydraulic cylinder. The pipe connecting the hydraulic power unit and the hydraulic cylinder passes through a third circular through-hole in the circular support plate. A cylindrical cover is also fixedly attached to the circular support plate, covering the hydraulic power unit and battery, as well as their connecting wires and pipes. The cylindrical cover's circumferential plate is provided with a movable door for repairing and replacing parts. With the above structure, the support frame is divided into a circular support plate and a rectangular support plate, both of which are connected to the columnar support body. This not only meets the support requirements, but also has a simple structure, saves materials, and facilitates observation of the piston rod's position and remaining power. The provision of the cylindrical cover and movable door not only protects the device from rain, dust, and other influences, ensuring that the device always maintains good working condition, but also facilitates inspection and maintenance.

[0018] Furthermore, the connecting column at the top of the drill rod is a first regular hexagonal column, the center hole of the sleeve is a first regular hexagonal hole adapted to the first regular hexagonal column, the drill rod inlet at the bottom of the sleeve is a trumpet mouth that is larger at the bottom and smaller at the top, two first parallel sides of the first regular hexagonal column at the top of the drill rod are provided with two mutually parallel first semicircular radial slots, two second parallel sides of the center hole of the sleeve corresponding to the two first semicircular radial slots are provided with second semicircular radial slots forming respective circular radial slots, the second semicircular radial slots being coaxial with the first through hole and the second through hole on the sleeve wall; the linear telescopic mechanism is provided with two left and right linear telescopic mechanisms, and the movement directions of the telescopic rods of the left and right linear telescopic mechanisms are opposite. After adopting the above structure, the drill rod can be used in conjunction with the existing power head, making the device highly versatile, and the drill rod and the sleeve of the device can be conveniently and quickly fitted at a height of several tens of meters, the mutually adapted first semicircular radial slots and the second semicircular radial slots forming a circular radial slot or being understood as a circular radial through hole, which has better firmness and safety. The left and right telescopic rods, i.e., the plug rods, which move in opposite directions, are plugged and fixed, so that the device has stronger firmness and better safety.

[0019] Another technical problem to be solved by the present invention is to provide a method for connecting or disconnecting the drill rod and the power head of a bored pile driver using the above-mentioned device for connecting or disconnecting the drill rod and the power head of the bored pile driver, which can realize the connection or disconnection of the drill rod and the power head without manual climbing to a height of dozens of meters.

[0020] Another technical solution of the present invention is to provide a device according to any of the above technical solutions, namely a device for connecting or disconnecting the drill rod of a bored pile driver and a power head, and a method for connecting or disconnecting the drill rod of a bored pile driver and a power head.

[0021] Connecting the drill rod of the pile driver to the power head includes the following steps:

[0022] 1) Start the pile driver switch, lower the power head to the ground to a position convenient for human operation, manually plug the connecting head of the device into the center hole of the connecting sleeve of the power head and fix it with a pin;

[0023] 2) Manually connect the first lifting lug at the lower end of the sleeve of the device with the corresponding second lifting lug at the upper end of the drill rod using multiple steel wire ropes, then start the pile driver switch and raise the power head until the drill rod is vertical;

[0024] 3) Lower the power head so that the bottom end of the drill pipe is supported and kept vertical. Continue to lower the power head so that the center hole of the sleeve of the device fits on the top end of the drill pipe and is axially in place.

[0025] 4) Activate the transmitter of the remote control on the ground. The receiver of the remote control receives the electrical signal and transmits it to the main controller. The main controller turns on the power supply, so that the telescopic rod of the linear telescopic mechanism is inserted into the first through hole of the sleeve wall, the radial slot at the top of the drill rod, and the second through hole of the sleeve wall to be fixed.

[0026] After adopting the above steps, the present invention utilizes a device for connecting or disconnecting the drill rod of a bored pile driver and the power head, and a method for connecting the drill rod of a bored pile driver and the power head, which has the following advantages: No manual climbing of several dozen meters is required. Instead, a worker can operate the transmitting portion of a remote control from the ground to insert and insert a pin to connect, i.e., securely connect, the drill rod and the power head. The method of the present invention avoids the need for manual climbing of several dozen meters to operate the device. Instead, a worker can operate the remote control from the ground to connect and secure the drill rod and the power head, thereby ensuring the worker's personal safety, significantly reducing the worker's labor intensity, and significantly improving construction efficiency. This method solves a technical problem that has plagued the field for many years and has remained unresolved.

[0027] Furthermore, the process of disconnecting the drill rod of the pile driver from the power head comprises the following steps:

[0028] 5) Activate the pile driver switch to support and maintain the bottom end of the drill rod in a vertical position. Activate the transmitter of the remote controller on the ground. The receiver of the remote controller receives the electrical signal and transmits it to the main controller. The main controller is powered on to retract the telescopic rod of the linear telescopic mechanism to disengage the second through hole, the radial slot, and the first through hole.

[0029] 6) Start the pile driver switch, the power head rises so that the center hole of the sleeve of the device is axially separated from the top of the drill rod and is lifted by the wire rope to a vertical state;

[0030] 7) Use other pulling equipment to pull the bottom end of the drill pipe away, and at the same time lower the power head until the drill pipe lies horizontally on the ground, and then release the wire rope.

[0031] After adopting the above steps, the present invention utilizes a device for connecting or disconnecting the drill rod of a bored pile driver and the power head, and a method for disconnecting the drill rod of a bored pile driver from the power head, which has the following advantages: No manual climbing of several dozen meters is required. Instead, a worker can operate the transmitter of a remote control from the ground to insert a latch to disconnect the drill rod from the power head. The method of the present invention avoids the need for manual climbing of several dozen meters to operate the device. The worker can disconnect the drill rod from the power head by operating the remote control from the ground, thus ensuring the worker's personal safety, significantly reducing the worker's labor intensity, and significantly improving construction efficiency. This method solves a technical problem that has plagued the field for many years and has not been properly resolved.

[0032] Furthermore,

[0033] The first lifting lugs are symmetrically arranged on the left and right sides of the lower end of the sleeve, and the second lifting lugs are symmetrically arranged on the left and right sides of the upper end of the drill rod;

[0034] The linear telescopic mechanism comprises two left and right telescopic rods, and the main controller controls the insertion or withdrawal of the telescopic rods of the two linear telescopic mechanisms simultaneously. When the telescopic rods are inserted at the same time, the movement directions of the two telescopic rods are opposite, and when the telescopic rods are withdrawn at the same time, the movement directions of the two telescopic rods are also opposite.

[0035] In step 4), when the two telescopic rods are inserted into place, the pull rope connected to the piston rod pulls the contact structure of the travel switch to cut off the power so that the two telescopic rods stop moving, and the indicator light is lit at the same time as a warning;

[0036] The method further comprises the step of observing the power display screen to grasp the power stored when the device is lowered to the ground along with the power head so as to decide whether to replace the battery.

[0037] After adopting the above steps, there are two first and second lifting lugs, which not only simplifies the structure but also makes it easier and faster to fit the drill pipe and the power head at a height of several dozen meters. The use of two linear telescopic mechanisms, such as two hydraulic cylinders with piston rods moving in opposite directions to achieve plug-in fixation or pull-out disengagement, makes the device more secure and safer.

[0038] After adopting the above steps, the piston rod is extended axially into position, and the pull rope drives the contacts of the travel switch to disconnect, so that the operation of stopping the movement of the piston rod when it is inserted into position is more accurate, timely, stable and reliable, and the prompt function of the indicator light is more intuitive, obvious, simple and reliable, making it easier for workers to operate and grasp.

[0039] After following the above steps, you can check the remaining power by observing the power display screen at appropriate times to ensure that the device is always in the required power supply state. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1It is a structural schematic diagram of the device for connecting or disconnecting the drill rod and the power head of a bored pile driver according to the present invention when it is installed on the second power head of the double-power-head pile driver (the device and the drill rod have not yet been fitted, plugged in and fixed).

[0041] Figure 2 This is a structural schematic diagram of the device for connecting or disconnecting the drill rod and the power head of a bored pile driver of the present invention when it is simultaneously installed on the first power head and the second power head of a double-power-head pile driver (the device and one of the drill rods have not yet been fitted, plugged in and fixed).

[0042] Figure 3 The present invention is a schematic diagram of the three-dimensional structure of a device for connecting or disconnecting a drill rod and a power head of a bored pile driver, which includes a transmitting portion of a remote controller and a circular cylinder cover.

[0043] Figure 4 yes Figure 3 Schematic diagram of the upward-looking structure.

[0044] Figure 5 It is a schematic diagram of the top structure of the connected drill rods in the present invention, that is, the first drill rod or the second drill rod.

[0045] Figure 6 yes Figure 2 Schematic diagram of the enlarged structure of A in the figure.

[0046] Figure 7 This is a schematic diagram of the three-dimensional structure of the device for connecting or disconnecting the drill rod and the power head of the pile drilling machine of the present invention, omitting the transmitter of the remote control and the circular cylinder cover. Figure 1 .

[0047] Figure 8 This is a schematic diagram of the three-dimensional structure of the device for connecting or disconnecting the drill rod and the power head of the pile drilling machine of the present invention, omitting the transmitter of the remote control and the circular cylinder cover. Figure 2 .

[0048] As shown in the figure: 1. First power head, 2. First drill rod, 3. Slide rail, 4. Main mast, 5. Chassis, 6. Second drill rod, 7. Wire rope, 8. Column support, 9. Second power head, 10. Connector, 11. Third parallel edge, 12. Third semicircular radial slot, 13. Cylindrical cover, 14. Movable door, 15. Pipeline, 16. Hydraulic cylinder, 17. Indicator light, 18. Transmitter of remote control, 19. Travel switch, 20. Lever, 2 1. Pull rope, 22. Piston rod, 23. First through hole, 24. Sleeve, 25. Second through hole, 26. First lifting lug, 27. Rectangular support plate, 28. Power display screen, 29. Circular support plate, 30. Center hole of sleeve, 31. Control box, 32. Connecting column, 33. First parallel edge, 34. First semicircular radial slot, 35. Second lifting lug, 36. Hydraulic power unit, 37. Third through hole, 38. Battery, 39. Solenoid valve. DETAILED DESCRIPTION

[0049] The following is a further description of specific embodiments of the present invention with reference to the accompanying drawings. It should be noted that the description of these specific embodiments is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. Furthermore, the technical features involved in the various specific embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0050] like Figure 1 、 Figure 2 shown.

[0051] Existing pile drivers, also known as drilling rigs, such as combined power pile drivers, include a chassis 5, a main mast 4, slide rails 3, a power head that slides up and down the slide rails 3, driven by a winch and a traction rope (not shown), and a drill rod connected to the power head. The slide rails 3 are provided in two sets, along with two power heads, namely a first power head 1 and a second power head 9, and two drill rods, namely a first drill rod 2 and a second drill rod 6. The first drill rod 2 can be an auger drill rod, while the second drill rod 6 can be a polished rod, typically an extended drill rod.

[0052] like Figure 1 As shown in FIG, the device for connecting or disconnecting the drill rod of the pile forming machine with the power head of the present invention can be installed on the second power head 9 and used to connect, fix or disconnect with the second drill rod 6. Figure 2 As shown, the device for connecting or disconnecting the drill rod of a bored pile driver to a power head of the present invention can be installed on the first power head 1 for connection, fixation, or disconnection with the first drill rod 2; the device can also be installed on the second power head 9 for connection, fixation, or disconnection with the second drill rod 6. The device for connecting or disconnecting the drill rod of a bored pile driver to a power head of the present invention can also be installed on the power heads of a pile driver with a single power head or a triple power head for connection, fixation, or disconnection with the respective drill rods.

[0053] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 shown.

[0054] The present invention relates to a device for connecting or disconnecting a drill rod of a pile driver from a power head. The device comprises a cylindrical support body 8, the upper end of which is a connector 10 for plugging and securing the drill rod to the power head on the ground. The lower end of the cylindrical support body 8 is a sleeve 24 coaxial with the connector 10 and configured to fit over the top of the drill rod. A support frame is fixedly connected, for example, by welding, to the cylindrical support body 8. The top of the drill rod is a connecting column 32, i.e., a first regular hexagonal column.

[0055] The support frame is provided with at least one linear telescopic mechanism, preferably two in this embodiment. The telescopic rod of the linear telescopic mechanism is designed to be inserted into a first through-hole 23 in the sleeve wall, a radial slot at a drill rod top, such as the top of the first drill rod 2 or / and the top of the second drill rod 6 described below, and a second through-hole 25 in the sleeve wall for securing or releasing the support frame. This can also be stated as follows: The telescopic rod of the linear telescopic mechanism is designed to pass through the first through-hole 23 in the sleeve wall and be inserted into a radial slot in a connecting post 32 at a drill rod top, such as the top of the first drill rod 2 or / and the top of the second drill rod 6, and into the second through-hole 25 in the sleeve wall for securing or releasing the support frame.

[0056] Figure 6 The drill pipe shown includes Figure 1 and Figure 2 The first drill rod 2 and the second drill rod 6 are shown. The connecting column 32 at the top of the drill rod is a first regular hexagonal column, and the central hole 30 of the sleeve is a first regular hexagonal hole that matches the first regular hexagonal column of the connecting column 32. The drill rod entrance at the bottom end of the sleeve 24 is a trumpet-shaped mouth that is larger at the bottom and smaller at the top. Two first parallel sides 33 of the first regular hexagonal column of the connecting column 32 at the top of the drill rod are provided with two first semicircular radial slots 34 that are parallel to each other. The two second parallel sides of the first regular hexagonal hole of the sleeve 24 corresponding to the two first semicircular radial slots 34 are provided with second semicircular radial slots that form their own circular slots (the components within the central hole 30 of the sleeve described in this sentence are not shown in the figure).

[0057] It is not difficult to understand that the first through hole 23 and the second through hole 25 are coaxial, and there is only half of the radial slot at the top of the drill rod, and the other half is on the sleeve wall, that is, the first through hole 23 and the second through hole 25 are half of the radial slot in the sleeve wall, which together with the half of the radial slot at the top of the drill rod form a complete circular radial slot.

[0058] It is not difficult to understand, Figure 3 、 Figure 4 、 Figure 6 、 Figure 7 The structure of the first through hole 23, radial slot and second through hole 25 on the front side is shown in the figure, while the structure of the first through hole 23, radial slot and second through hole 25 on the rear side that matches the other piston rod 22 is the same and symmetrical. The following will also be described from the perspective of the telescopic structure.

[0059] The linear telescopic mechanism is electrically connected to a main controller mounted on a support frame, such as a circular support plate 29. The main controller is a commercially available product, such as a commercially available control chip, CPU, or PLC. The main controller can be housed in a control box 31, which can be fixed to the bottom surface of the circular support plate 29, for example, by screwing or gluing. The control box 31 is electrically connected to the controlled components via wires passing through holes in the circular support plate 29. These wires are not shown.

[0060] The linear telescopic mechanism is electrically connected to a battery, such as a storage battery 38, mounted on the support frame and providing a DC power source via a power on / off switch. For example, the DC motor in the hydraulic power unit 36 ​​that powers the hydraulic cylinder 16 is electrically connected to the storage battery 38, also mounted on the support frame and providing a DC power source, via the power on / off switch. The power on / off switch is electrically connected to the main controller. The storage battery 38 is also called a storage battery. Both the power on / off switch and the storage battery 38 are commercially available products. The power on / off switch may also be located within the control box 31.

[0061] The device for connecting or disconnecting the drill rod of a pile driver to a power head of the present invention also includes a remote control. The remote control's receiver is mounted on a support frame and electrically connected to a main controller. The remote control's transmitter 18 is operated by ground personnel, such as a worker. The remote control is also commercially available. The remote control's receiver can also be mounted within a control box 31.

[0062] The device for connecting or disconnecting a drill rod of a bored pile driver to a power head of the present invention further includes a plurality of, for example, two, first lifting ears 26 fixedly connected, for example, by welding, to the lower end of a sleeve 24. The two first lifting ears 26 are used to be fixedly connected, for example, by welding, to a plurality of, for example, two, second lifting ears 35 at the upper end of the drill rod via a steel wire rope 7. The steel wire rope 7 is fastened by, for example, a U-shaped clip to vertically suspend a drill rod, for example, a first drill rod 2 or / and a second drill rod 6, directly below the center hole of the sleeve 24 to facilitate mutual engagement between the top end of the drill rod, i.e., the connecting column 32, and the center hole 30 of the sleeve.

[0063] The linear telescopic mechanism is preferably a hydraulic cylinder 16, and the telescopic rod is preferably a piston rod 22. The hydraulic cylinder 16 is connected to a hydraulic power unit 36 ​​through multiple pipes 15 and multiple solenoid valves 39. The multiple solenoid valves 39 are electrically connected to a main controller. The battery is preferably a storage battery 38. The storage battery 38 is connected to the DC motor in the hydraulic power unit 36 ​​via a power on / off switch. The power on / off switch is electrically connected to the main controller. The hydraulic cylinder 16, the hydraulic power unit 36, and the solenoid valves 39 are all commercially available. Two hydraulic cylinders 16 are symmetrically arranged outside the sleeve 24, but only one hydraulic power unit 36 ​​is required. Both hydraulic cylinders 16 are connected to a common hydraulic power unit 36 ​​through multiple pipes 15 and multiple solenoid valves 39. The linear telescopic mechanism can also utilize an electric push rod, etc. Of course, the linear telescopic mechanism is preferably a hydraulic cylinder 16 powered by a hydraulic power unit 36, and the telescopic rod is preferably a piston rod 22. This provides better mechanical properties, greater force, greater operational stability and reliability, and easier maintenance and replacement. The battery 38 may also be referred to as a battery.

[0064] There are two linear telescopic mechanisms on the left and right, and the movement directions of the telescopic rods of the left and right linear telescopic mechanisms are opposite. Figure 4 、 Figure 7 As shown, see Figure 5 There are two hydraulic cylinders 16 mounted on their respective rectangular support plates 27, each with two piston rods 22. The left hydraulic cylinder 16 has one piston rod 22, and the right hydraulic cylinder 16 also has one piston rod 22. When plugged in, the left piston rod 22 plugs rightward into the first through hole 23, the circular radial slot, and the second through hole 25 of the sleeve wall, while the right piston rod 22 plugs leftward into the first through hole 23, the circular radial slot, and the second through hole 25 of the sleeve wall. The circular radial slot refers to the aforementioned mutually corresponding first semicircular radial slot 34 and second semicircular radial slot (not shown), which together form a first circular radial slot (not shown). The first circular radial slot can also be considered a first circular radial through hole. There is also one first circular radial slot on the front and one on the rear. The following will also be described from the perspective of the method.

[0065] The present invention is a device for connecting or disconnecting the drill rod of a bored pile driver from a power head. The device also includes a power display unit mounted on a support frame. The display screen 28 of the power display unit is located in a position visible to the human eye when the device of the present invention is lowered to the ground, and the remaining power can be observed from the outside. The power display unit is electrically connected to a battery, such as a storage battery 38. The power display unit can also be a commercially available product, such as a commercially available power indicator or a commercially available power display screen. By mounting a separate power display screen 28 or a power display screen 28 of a power indicator on the outer peripheral surface of a support frame, such as the cylindrical cover 13 described below, the remaining power can be observed when the device is lowered to the ground, so as to maintain the current status or replace the storage battery 38 to ensure that the device is always powered. If a power display with a power display screen 28 is used, the power display can be mounted in the control box 31.

[0066] The present invention provides a device for connecting or disconnecting a drill rod from a pile driver, further comprising a displacement control unit and a displacement status indicator. For example, the displacement control unit is preferably a travel switch 19 mounted on the hydraulic cylinder 16 or support frame, and the displacement status indicator is preferably an indicator light 17 mounted on the hydraulic cylinder 16 or support frame. The contact structure of the travel switch 19 (not shown) is connected to the piston rod 22 via a lever 20 and a pull rope 21, such as a steel wire rope. Both the travel switch 19 and the indicator light 17 are electrically connected to a main controller. The above is a preferred embodiment. The travel switch contacts can also be mounted outside the sleeve in a position where they can directly contact the piston rod end. Alternatively, the displacement control unit may be omitted, and the extension and retraction stops may be controlled by a preset telescopic rod extension or retraction time, such as the piston rod extension time, set by the main controller. Alternatively, a displacement sensor may be used in conjunction with the main controller to control the stopping of movement at the fully extended and retracted positions. The displacement status indicator may also employ voice prompts or doorbell notifications. The travel switch 19 and the indicator light 17 are both commercially available products. The telescopic rod such as the piston rod 22 can be understood as an electric latch or an electric plug rod here.

[0067] The support frame includes a circular support plate 29 for supporting components such as the hydraulic power unit 36 ​​and battery 38, and a rectangular support plate 27 for supporting components such as the hydraulic cylinder 16. Multiple pipes 15 connecting the hydraulic power unit 36 ​​and the hydraulic cylinder 16 pass through third through-holes 37 in the circular support plate 29. A cylindrical cover 13 is also fixedly attached, such as by welding, to the circular support plate 29, covering components such as the hydraulic power unit 36, battery 38, solenoid valve 39, their connecting wires, and multiple pipes 15. A movable door 14 is provided on the circumferential plate of the cylindrical cover 13 for repairing and replacing components. For example, two symmetrical movable doors 14 can be provided, which can be plugged or hinged to the circumferential plate and then locked. It is readily understood that the cylindrical support body 8, circular support plate 29, rectangular support plate 27, first lifting lug 26, and second lifting lug 35 of the device are all made of steel and are connected to each other by welding. The aforementioned holes for wire passage and the third through-hole can be sealed with glue after the wires and pipes are installed.

[0068] The method for connecting or disconnecting the drill rod of a pile forming machine to a power head by using the device described in any one of the above technical solutions of the present invention comprises the following steps:

[0069] The device described here refers to the device of the present invention for connecting or disconnecting the drill rod and the power head of the bored pile driver.

[0070] 1) Start the pile driver switch, lower the power head to the ground for easy operation, manually plug the connecting head 10 of the device into the center hole of the connecting sleeve of the power head and fix it with a pin (not shown in the figure).

[0071] It is easy to understand that, in order to make it more versatile, the structure of the connector 10 of this device is the same as the structure of the top of the drill pipe used to connect to the center hole of the connecting sleeve of the power head, such as the first power head 1 and the second power head 9. For example, the connector 10 is a second regular hexagonal column, and two parallel third semicircular radial slots 12 are provided on the two third parallel sides 11, which together with the fourth semicircular slots (not shown in the figure) on the wall of the second regular hexagonal hole of the connecting sleeve of the power head form a second circular radial slot (not shown in the figure). The first circular radial slot and the second circular radial slot described above can both be called circular radial through holes or first circular radial through holes and second circular radial through holes. During manual operation, after the second regular hexagonal column of the connecting head 10 of the device is combined with the center hole of the connecting sleeve of the power head, i.e., the second regular hexagonal hole sleeve, and axially positioned, two radial pins or pin shafts are used to be horizontally inserted into the center hole of the power head, i.e., the second regular hexagonal hole, and the end of each pin extending outside the power head is axially limited. For example, one end of the two outer ends of the pin is axially limited by the large head, and the other end has a radial pin hole. Insert the cotter pin into the radial pin hole, and then separate the opening of the cotter pin to both sides, so that the connecting head 10 of the device of the present invention is plugged into and fixed to the power head.

[0072] The aforementioned "plug-in fixation" or "fixing" refers to the position of the pin being fixed after plugging in. In the above-described device, the connector 10 is inserted into the center hole of the coupling sleeve of the power head and then plugged in and fixed by the pin, securing the connector 10 to the coupling sleeve of the power head. However, in the present device, after the sleeve 24 is plugged into the connecting column 32 at the top of the drill pipe, a telescopic rod, such as a piston rod, replaces the pin. This also involves plug-in fixation, i.e., the position of the piston rod 22 is fixed, and the sleeve 24 is secured to the top of the drill pipe by self-locking and axially limiting the linear telescopic structure, such as the hydraulic cylinder 16.

[0073] 2) Manually connect the two first lifting ears 26 at the lower end of the sleeve 24 of the device of the present invention with the two second lifting ears 35 corresponding to the upper end of the drill rod using multiple steel wire ropes 7, then start the pile driver switch and raise the power head such as the first power head 1 or the second power head 9 until the drill rod such as the first drill rod 2 or the second drill rod 6 is in a vertical state.

[0074] During specific operation, each wire rope 7 is sleeved on the first lifting lug 26 on one side of the lower end of the sleeve 24 of the device and the second lifting lug 35 on the same side of the upper end of the drill pipe to form a closed loop, and then fixed with a U-shaped clip.

[0075] 3) Lower the power head so that the bottom end of the drill pipe is supported and kept in a vertical state. The power head continues to lower so that the center hole 30 of the sleeve of the device is fitted on the top end of the drill pipe and axially in place.

[0076] It's easy to understand that, when a hole hasn't been drilled, the bottom end of the drill rod can be placed directly on the ground. Under its own weight, the drill rod maintains a vertical position. Generally, the drill rod is manually supported while the power head at the top drives the device downward, achieving the process of sleeve center hole 30 engaging with the top end of the drill rod and axially positioning it. If a hole has already been drilled, a steel plate can be laid on the ground where the hole is being drilled, and the bottom end of the drill rod rests on the plate. If the operation is performed on a work platform, the ground can also refer to the work platform surface, though a separate steel plate is generally required. In addition to manually supporting the bottom end of the drill rod, a clamping mechanism can also be provided on the ground or work platform. A symmetrical power cylinder, such as a pneumatic cylinder, can have its free end fixedly connected, for example, with a respective arc-shaped pressure plate welded to the end of the piston rod. This clamps the bottom end of the drill rod and maintains it in a vertical position, ensuring that the power head at the top drives the device downward, achieving sleeve center hole 30 engaging with the top end of the drill rod and axially positioning it more accurately and quickly. The clamping mechanism can be released after the next step of latching and securing is complete.

[0077] 4) On the ground, the transmitter 18 of the remote control is activated. The receiver receives the electrical signal and transmits it to the main controller. The main controller then powers on, causing the telescopic rod of the linear telescopic mechanism, such as the piston rod 22 of the hydraulic cylinder 16, to be inserted and secured within the first through-hole 23 in the sleeve wall, the radial slot at the top of the drill rod, and the second through-hole 25 in the sleeve wall. The radial slot here can be understood as the first circular radial slot or first circular through-hole formed by the first semicircular radial slot 34 in the plug connector and the second semicircular radial slot in the wall of the sleeve center hole 30 of the sleeve 24.

[0078] It will be readily understood that powering on involves connecting the power to the DC motor in the hydraulic power unit 36 ​​and the power to the solenoid valve 39, providing a hydraulic source to the hydraulic cylinder 16, pushing the piston rod 22 axially outward and into position. Disengaging the piston rod 22 is similar, but in the opposite direction, pushing the piston rod 22 axially back into position.

[0079] It is not difficult to understand that the above-mentioned fixing of the top end of the drill rod to the power head means that the top end of the drill rod is connected and fixed to the power head through this device, and can also be understood as the indirect connection and fixation of the top end of the drill rod to the power head.

[0080] In addition, when the drill rod needs to be replaced, the following steps are involved in disconnecting the drill rod from the power head of the pile driver:

[0081] 5) The pile driver switch is turned on to support the bottom end of the drill rod and keep it in a vertical position. The transmitter 18 of the remote controller is activated on the ground. The receiver of the remote controller receives the electrical signal and transmits it to the main controller. The main controller is powered on to retract the telescopic rod of the linear telescopic mechanism, such as the piston rod 22 of the hydraulic cylinder 16, to disengage the second through hole 25, the radial slot and the first through hole 23.

[0082] The meaning of the radial slot is the same as above, so that the bottom end of the drill pipe is supported and kept in a vertical state. The operation is the same as step 3) above, and will not be repeated here.

[0083] 6) Start the pile driver switch, the power head rises so that the sleeve center hole 30 of the device is axially separated from the top of the drill rod and is lifted by the wire rope 7 to a vertical state;

[0084] 7) Use other pulling equipment to pull the bottom end of the drill rod away, and at the same time, lower the power head such as the first power head 1 or the second power head 9 until the drill rod such as the first drill rod 2 or the second drill rod 6 lies horizontally on the ground, and then release the wire rope 7.

[0085] For pulling, a truck crane can be used to wrap another wire rope around the bottom end of the drill pipe and pull it to a distance.

[0086] Likewise, the above-mentioned disconnection of the top end of the drill rod from the power head refers to the disconnection of the top end of the drill rod from the device of the present invention, which can also be understood as the indirect disconnection of the top end of the drill rod from the power head.

[0087] In the description of this method, also,

[0088] like Figure 4 、 Figure 7 As shown, the first lifting lugs 26 are preferably symmetrically arranged on the left and right sides of the lower end of the sleeve 24, and the second lifting lugs 35 are preferably symmetrically arranged on the left and right sides of the upper end of the drill pipe.

[0089] like Figure 4 、 Figure 7 As shown, the linear telescopic mechanism is preferably two on the left and right, and the main controller simultaneously controls the respective telescopic rods of the two linear telescopic mechanisms, such as the piston rods 22 of the respective hydraulic cylinders 16, to be inserted or withdrawn. When inserted at the same time, the movement directions of the left and right telescopic rods, such as the left and right piston rods 22, are opposite, and when withdrawn at the same time, the movement directions of the left and right telescopic rods, such as the left and right piston rods 22, are also opposite.

[0090] In step 4), when the two telescopic rods, such as the two piston rods 22, are inserted into place, the step also includes a step in which the pull rope 21 connected to the piston rod 22 pulls the contact structure of the travel switch 19 to disengage the contacts and cut off the power so that the two telescopic rods, such as the piston rod 22, stop moving. At the same time, the indicator light 17 lights up as a warning, that is, the indicator light 17 is on, indicating that the piston rod 22, i.e., the plug-in rod, is axially in place.

[0091] The method of the present invention further includes the step of observing the power display 28 to grasp the stored power to determine whether to replace the battery, such as the storage battery 38, when the device, i.e., the device for connecting or disconnecting the drill rod of the pile driver with the power head, descends to the ground with the power head.

[0092] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A device for connecting or disconnecting a drill rod of a pile driver with a power head, characterized in that: It includes a columnar support body, the upper end of which is a connector for plugging and fixing with a power head on the ground, the lower end of which is a sleeve coaxial with the connector and for fitting with the top end of a drill pipe, and a support frame is fixedly connected to the columnar support body; At least one linear telescopic mechanism is disposed on the support frame, and a telescopic rod of the linear telescopic mechanism is used to be inserted into a first through hole of the sleeve wall, a radial slot at the top end of the drill rod, and a second through hole of the sleeve wall to be fixed or disengaged, and the linear telescopic mechanism is electrically connected to a main controller disposed on the support frame; The linear telescopic mechanism is electrically connected to a battery provided on the support frame and providing a DC power supply via a power on-off switch, and the power on-off switch is electrically connected to a main controller; It also includes a remote controller, the receiving part of which is arranged on the support frame and electrically connected to the main controller, and the transmitting part of which is operated by ground personnel; It also includes a plurality of first lifting ears fixedly connected to the lower end of the sleeve, and the plurality of first lifting ears are used to be fixedly connected to a plurality of second lifting ears at the upper end of the drill rod via a wire rope so as to vertically hang the drill rod just below the center hole of the sleeve to facilitate mutual sleeve connection; It also includes a displacement control unit and a displacement state indicating device; The displacement control unit is a travel switch arranged on the hydraulic cylinder or the support frame, and the displacement state indicating device is an indicator light arranged on the hydraulic cylinder or the support frame; the contact structure of the travel switch is connected to the piston rod via a lever and a pull rope, and the travel switch and the indicator light are both electrically connected to the main controller; The connecting column at the top of the drill rod is a first regular hexagonal column, the center hole of the sleeve is a first regular hexagonal hole adapted to the first regular hexagonal column, the drill rod inlet at the bottom of the sleeve is a trumpet mouth that is larger at the bottom and smaller at the top, and there are two first semicircular radial slots parallel to each other on the two first parallel sides of the first regular hexagonal column at the top of the drill rod, and second semicircular radial slots constituting respective circular radial slots are provided on the two second parallel sides of the center hole of the sleeve corresponding to the two first semicircular radial slots, and the second semicircular radial slots are coaxial with the first through hole and the second through hole on the sleeve wall; there are two left and right linear telescopic mechanisms, and the movement directions of the telescopic rods of the left and right linear telescopic mechanisms are opposite.

2. The device for connecting or disconnecting the drill rod and the power head of a pile driver according to claim 1, characterized in that: The linear telescopic mechanism is a hydraulic cylinder, the telescopic rod is a piston rod, the hydraulic cylinder is connected to a hydraulic power unit providing power through multiple pipes and multiple solenoid valves, and the solenoid valve is electrically connected to a main controller; the battery is a storage battery, and the storage battery is connected to a DC motor in the hydraulic power unit via a power on-off switch, and the power on-off switch is electrically connected to the main controller.

3. The device for connecting or disconnecting the drill rod and the power head of a pile driver according to claim 1 or 2, characterized in that: The device also includes a power display unit arranged on the support frame. The power display screen of the power display unit is located at a position that can be observed by human eyes when the device descends to the ground. The power display unit is electrically connected to the battery.

4. The device for connecting or disconnecting the drill rod and the power head of a pile driver according to claim 2, characterized in that: The support frame includes a circular support plate for supporting the hydraulic power unit and the battery and a rectangular support plate for supporting the hydraulic cylinder. The pipeline connecting the hydraulic power unit and the hydraulic cylinder passes through the third circular through hole on the circular support plate. The circular support plate is also fixedly connected to a cylindrical cover for covering the hydraulic power unit and the battery and their connecting wires and pipelines. A movable door for repairing and replacing parts is provided on the circumferential plate of the cylindrical cover.

5. A method for connecting or disconnecting a drill rod of a pile driver with a power head by using the device according to any one of claims 1 to 4, characterized in that: Connecting the drill rod of the pile boring machine to the power head includes the following steps: 1) Start the pile driver switch, lower the power head to the ground to a position convenient for human operation, manually plug the connecting head of the device into the center hole of the connecting sleeve of the power head and fix it with a pin; 2) Manually connect the first lifting lug at the lower end of the sleeve of the device with the second lifting lug corresponding to the upper end of the drill rod with multiple steel wire ropes, then start the pile driver switch to raise the power head until the drill rod is in a vertical state; 3) Lower the power head so that the bottom end of the drill pipe is supported and kept vertical. The power head continues to lower so that the center hole of the sleeve of the device fits on the top end of the drill pipe and is axially in place; 4) Start the transmitter of the remote control on the ground, the receiver of the remote control receives the electrical signal and transmits it to the main controller, the main controller turns on the power, and the telescopic rod of the linear telescopic mechanism is inserted into the first through hole of the sleeve wall, the radial slot at the top of the drill rod and the second through hole of the sleeve wall to be fixed.

6. The method for connecting or disconnecting the drill rod of a pile driver with a power head according to claim 5, characterized in that: Disconnecting the drill rod and the power head of the pile forming machine includes the following steps: 5) Start the pile driver switch to support the bottom end of the drill rod and keep it in a vertical state, start the transmitter of the remote controller on the ground, the receiver of the remote controller receives the electrical signal and transmits it to the main controller, the main controller is powered on, and the telescopic rod of the linear telescopic mechanism is retracted to disengage the second through hole, the radial slot and the first through hole; 6) Start the pile driver switch, the power head rises so that the center hole of the sleeve of the device is axially separated from the top of the drill rod and is lifted by the wire rope to a vertical state; 7) Use other pulling equipment to pull the bottom end of the drill pipe away and lower the power head at the same time until the drill pipe lies horizontally on the ground, and then release the wire rope.

7. The method for connecting or disconnecting the drill rod of a pile driver with a power head according to claim 6, characterized in that: The first lifting lugs are two symmetrically arranged on the left and right sides of the lower end of the sleeve, and the second lifting lugs are two symmetrically arranged on the left and right sides of the upper end of the drill rod; The linear telescopic mechanism is composed of two left and right linear telescopic mechanisms, and the main controller controls the respective telescopic rods of the two linear telescopic mechanisms to insert or withdraw at the same time. When inserting at the same time, the movement directions of the two telescopic rods are opposite, and when withdrawing at the same time, the movement directions of the two telescopic rods are also opposite; In step 4), when the two telescopic rods are inserted into place, the step also includes a pull rope connected to the piston rod pulling the contact structure of the travel switch to cut off the power so that the two telescopic rods stop moving, and the indicator lights light up at the same time to warn; The method also includes observing a power display screen to grasp the power stored when the device is lowered to the ground along with the power head to determine whether to replace the battery.

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