A safe uncoupling and quick recovery device for a dynamic compaction machine and a working method thereof

Abstract

The present invention discloses a safe unhooking and quick recovery device for a dynamic tamping machine and its working method. The device is arranged on the truss arm of the dynamic tamping machine and comprises a circular iron plate, an electromagnetic suction cup fixed to the lower surface of the circular iron plate, a plurality of hooks spaced apart on the outer edge of the circular iron plate, and a hoisting mechanism for suspending the circular iron plate. The electromagnetic suction cup electromagnetically absorbs the upper surface of the tamping hammer. The outer edge of the tamping hammer is provided with a plurality of grooves for hooking. The tail end of the hook has a rod body, which is hinged to the outer edge of the circular iron plate and driven to rotate by a hydraulic mechanism. The advantages of the present invention are: (1) the hook and the electromagnetic suction cup are used to double-hang the tamping hammer, which can not only achieve hoisting installation, but also avoid wear of the connecting parts, and realize wear-free unhooking; (2) a two-stage hoisting mechanism is used to hoist the tamping hammer. When the tamping hammer falls, the circular iron plate hoisted by the hoisting mechanism can fall synchronously, thereby realizing rapid recovery of the tamping hammer.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering machinery, and in particular relates to a safe unhooking and quick recovery device for a dynamic compaction machine and a working method thereof. Background Art

[0002] A dynamic compactor is a machine used for compacting foundations. The rammer is lifted to a specified height through a lifting device and then released. The huge impact force generated when the rammer falls to the ground acts on the foundation, causing a large deformation of the foundation and thereby enhancing its bearing capacity.

[0003] During foundation compaction, the release of the rammer is achieved through a unhooker. Most of the current unhookers control the release of the rammer through an opening and closing hook mechanism. However, since most rammers are heavy components weighing from several tons to dozens of tons, sudden release will cause greater damage to the hook mechanism and generate an upward rebound force at the moment of release, causing the main structure of the rammer to shake.

[0004] In view of the above problems, those skilled in the art are in urgent need of a ramming machine uncoupling device that can solve the problems of uncoupling damage and instantaneous rebound during release. Summary of the Invention

[0005] The purpose of the present invention is to provide a safe unhooking and rapid recovery device for a rammer and a working method thereof based on the above-mentioned deficiencies of the prior art. The unhooking and rapid recovery device ensures the safety of lifting and unhooking by adopting a dual lifting method of hooking and buckling and electromagnetic adsorption for the rammer, effectively avoiding wear during unhooking; at the same time, by adopting a two-stage winch and a clutch method, when the rammer falls, the circular iron plate and the electromagnetic suction cup can release the rebound force in time and fall synchronously, so that the rammer can be quickly hooked and buckled and electromagnetically adsorbed after falling, thereby accelerating the recovery efficiency.

[0006] The purpose of the present invention is achieved by the following technical solutions:

[0007] A safe uncoupling and rapid recovery device for a dynamic ramming machine is arranged on the truss arm of the dynamic ramming machine, and is characterized in that the uncoupling and rapid recovery device includes a circular iron plate, an electromagnetic suction cup fixed to the lower surface of the circular iron plate, a plurality of hooks spaced apart on the outer edge of the circular iron plate, and a winch mechanism for suspending the circular iron plate. The electromagnetic suction cup electromagnetically absorbs the upper surface of a rammer, and a plurality of grooves are provided on the outer edge of the rammer for the hook to be hooked. The tail end of the hook has a rod body, and the rod body is hinged to the outer edge of the circular iron plate and driven to rotate by a hydraulic mechanism.

[0008] The hoisting mechanism includes a first-stage hoist and a second-stage hoist fixed on a rotatable platform of the ramming machine. A fixed pulley mechanism is provided at the top of the truss arm. The steel cable on the first-stage hoist is connected to the upper surface of the circular iron plate after passing through the second-stage hoist and the fixed pulley mechanism in sequence. The winding length of the steel cable on the second-stage hoist is the descending height of the rammer.

[0009] The second-stage hoist is provided with a clutch mechanism, and the clutch mechanism and the electromagnetic suction cup are controlled in linkage by the same control host.

[0010] The electromagnetic chuck is powered by an external power grid.

[0011] At least three lifting holes are arranged at intervals along the circumference of the circular iron plate, and a lifting cable is passed through each lifting hole to be connected with the steel cable in the hoisting mechanism.

[0012] The number of the grooves on the outer edge of the rammer is twice the number of the hooks.

[0013] A working method involving the safe uncoupling and rapid recovery device of any dynamic compaction machine, characterized in that the working method comprises the following steps:

[0014] (S1) controlling the truss arm of the dynamic tamping machine to rotate to the position directly above the rammer on the ground, controlling the circular iron plate to descend to the height of the rammer by means of a hoisting mechanism, and hooking the hook on the circular iron plate to the groove on the upper outer edge of the rammer under the drive of a hydraulic mechanism; then energizing the electromagnetic suction cup on the lower surface of the circular iron plate to electromagnetically attract the rammer;

[0015] (S2) After the rammer is hooked and electromagnetically attracted, the rammer is lifted to the designed elevation position by the hoisting mechanism; then the hydraulic mechanism is controlled to drive the rod body of the hook to rotate to release the hooking and buckling of the rammer; after the hooking and buckling of the rammer are released, the electromagnetic suction cup is powered off to release the electromagnetic attraction of the rammer so that the rammer falls and hits the ground; 0.2-0.5 seconds after the electromagnetic suction cup is powered off, the transmission between the roller shaft and the motor of the second-stage hoist in the hoisting mechanism is released by the clutch mechanism; under the downward pull of the circular iron plate and the electromagnetic suction cup, the steel cable hoisting the circular iron plate drives the roller shaft of the second-stage hoist to rotate to release the steel cable until the circular iron plate falls above the rammer;

[0016] (S3) After the circular iron plate falls to the top of the rammer, the clutch mechanism is controlled to reconnect the motor to the roller shaft of the second-stage winch, and the hook on the circular iron plate is driven by the hydraulic mechanism to be hooked and engaged with the groove on the upper outer edge of the rammer; then, the electromagnetic suction cup is energized to electromagnetically absorb the rammer;

[0017] (S4) Repeat steps S2 and S3, and repeat this process until the compaction of the entire foundation is completed.

[0018] The winding length of the steel cable on the second-stage winch is 9 / 10 of the designed elevation of the rammer.

[0019] The advantages of the present invention are:

[0020] (1) This device uses a hook and an electromagnetic suction cup to double-lift the rammer to ensure the installation safety. When releasing the rammer, the hook is first released from the rammer, and then the power is turned off to release the electromagnetic suction cup from the rammer. This decoupling method can avoid wear of the connecting parts and achieve lossless decoupling.

[0021] (2) This device uses a two-stage winch to hoist the rammer. A clutch mechanism is used on one stage of the winch so that when the rammer falls, the circular iron plate hoisted by the winch can fall synchronously, thereby realizing the rapid recovery of the rammer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of the safe unhooking and rapid recovery device for the dynamic compaction machine of the present invention;

[0023] Figure 2 For the present invention Figure 1 A partial enlarged schematic diagram of point A in the middle;

[0024] Figure 3 It is a plan view of the circular iron plate of the present invention;

[0025] Figure 4 This is a plan view of the winch mechanism on the rotatable platform of the dynamic compaction machine in the present invention. DETAILED DESCRIPTION

[0026] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0027] like Figure 1-4, the marks in the figure are: dynamic compaction machine 1, first-stage winch 2, second-stage winch 3, steel cable 4, fixed pulley mechanism 5, lifting cable 6, round iron plate 7, hydraulic mechanism 8, rod body 9, hook 10, electromagnetic suction cup 11, groove 12, rammer 13, lifting hole 14, roller 15, motor 16, hydraulic pushing mechanism 17, slide rail 18, truss arm 19.

[0028] Example: Figure 1 、 2 As shown in Figures 3 and 4, this embodiment specifically relates to a safe unhooking and rapid recovery device for a dynamic ramming machine and a working method thereof. The device is arranged on the truss arm 19 of the dynamic ramming machine 1, and mainly includes a circular iron plate 7, an electromagnetic suction cup 11 fixed to the lower surface of the circular iron plate 7, a plurality of hooks 10 spaced apart on the outer edge of the circular iron plate 7, and a winch mechanism for suspending the circular iron plate 7.

[0029] like Figure 1 、 2 As shown in Figure 3, the circular iron plate 7 is used as a suspension base, and a number of suspension holes 14 are provided on it at intervals along the circumference. In this embodiment, there are four suspension holes 14. A suspension cable 6 is passed through each suspension hole 14 and connected to the steel cable 4 on the hoisting mechanism, so that the hoisting mechanism can suspend the circular iron plate 7. An electromagnetic suction cup 11 is fixedly installed on the lower surface of the circular iron plate 7. The electromagnetic suction cup 11 is specifically powered by the mains electricity. By energizing its internal coil to generate magnetic force, the rammer 13 can be electromagnetically adsorbed through the magnetic conductive panel. After the coil is powered off, the magnetic force disappears to achieve demagnetization. The electromagnetic suction cup 11 in this embodiment has an electromagnetic attraction force of not less than 14kg / cm2. It should be noted that the rammer 13 in this embodiment is made of metal to facilitate the electromagnetic adsorption operation of the electromagnetic suction cup 11.

[0030] like Figure 1 、 2 As shown in Figure 3, a plurality of hooks 10 are arranged at intervals on the outer edge of the circular iron plate 7. The tail end of the hook 10 is a rod body 9. A hinge device is provided at the connection between the rod body 9 and the hook 10 and is fixed to the outer edge of the circular iron plate 7. A hydraulic mechanism 8 is provided at the tail end of the rod body 9. The front end of the hydraulic mechanism 8 and the rod body 9 adopt a sliding fit, that is, the lifting or contraction action of the hydraulic mechanism 8 can drive the rod body 9 and its hook 10 to rotate at the hinge device, and the rotation action of the hook 10 can control whether its hook claw extends into the groove 12 on the outer wall surface of the rammer 13 to form a hook and buckle connection. It should be noted that, in this embodiment, the number of hooks 10 provided on the outer edge of the circular iron plate 7 is 4, and the number of grooves 12 provided on the outer wall surface of the rammer 13 is 8. As many grooves 12 as possible can facilitate the purpose of rapid recovery and reduce the adjustment time.

[0031] like Figure 1 、2 As shown in Figures 3 and 4, the hoisting mechanism includes a first-stage hoist 2 and a second-stage hoist 3 sequentially arranged on the rotatable platform of the tamping machine 1, and a fixed pulley mechanism 5 fixed on the truss arm 19. The steel cable 4 on the first-stage hoist 2 is sequentially connected to the hoisting cables 6 of the circular iron plate 7 after passing through the second-stage hoist 3 and the fixed pulley mechanism 5 to achieve the lifting of the circular iron plate 7 and the workpieces thereon. Among them, the first-stage hoist 2 is composed of a roller 15 and a motor 16 that drives the roller 15 to rotate. The second-stage hoist 3 is composed of a roller 15, a motor 16 that drives the roller 15 to rotate, and a clutch mechanism arranged between the motor 16 and the roller 15. The clutch mechanism includes slide rails 18 arranged on both sides below the motor 16 and a hydraulic pushing mechanism 17 that drives the motor 16 to move along the slide rails 18. The pushing of the hydraulic pushing mechanism 17 can achieve the sliding of the motor 16 on the slide rails 18 to achieve whether the clutch is engaged or not. The clutch mechanism and the electromagnetic suction cup 11 are both controlled by the same control host. It should be noted that a steel cable 4 of sufficient length is wound around the roller 15 of the second-stage winch 3. The specific length of the winding can be 9 / 10 of the design elevation of the rammer 13, so that the circular iron plate 7 can fall to the upper part of the rammer 13 but avoid collision and contact between the two.

[0032] like Figure 1-4 As shown, the working method of the safe uncoupling and rapid recovery device of the dynamic compaction machine in this embodiment includes the following steps, which are as follows:

[0033] (S1) The rammer 13 is located on the ground to be compacted, and the dynamic ramming machine 1 is controlled to move to that location and its truss arm 19 is controlled to rotate to the top of the rammer 13. The main control unit is used to control the winch mechanism to rotate forward to release the steel cable 4, so that the circular iron plate 7 is lowered to the height position of the rammer 13; then, the main control unit is controlled to control the hook 10 on the circular iron plate 7 to rotate into the groove 12 of the rammer 13 under the drive of the hydraulic mechanism 8 to hook and connect with the rammer 13; after completing the first connection, the main control unit is controlled again to energize the electromagnetic suction cup 11 to electromagnetically adsorb the rammer 13 to achieve the second connection.

[0034] (S2) After the rammer 13 is hooked and electromagnetically attracted, the rammer 13 is lifted to the designed elevation position by the hoisting mechanism; the hydraulic mechanism 8 is then controlled to drive the rod body 9 of the hook 10 to rotate to release the hooking and buckling of the rammer 13. Under the electromagnetic attraction of the electromagnetic suction cup 11, wear between the hook 10 and the groove 12 of the rammer 13 during the rotation process can be avoided; after the hooking and buckling of the rammer 13 is released, the electromagnetic suction cup 11 is powered off to release the electromagnetic attraction of the rammer, thereby causing the rammer 13 to fall and hit the ground;

[0035] 0.2-0.5 seconds after the electromagnetic suction cup is powered off, the clutch mechanism is used to release the transmission between the roller 15 and the motor 16 of the second-stage winch 3 in the winch mechanism, that is, the hydraulic pushing mechanism 17 pushes the motor 16 to make it slide on the slide rail 18 to release the transmission between the roller 15 and the output shaft of the motor 16; under the downward pull of the circular iron plate 7 and the electromagnetic suction cup 11, the steel cable 4 that hoists the circular iron plate 7 drives the roller 15 of the second-stage winch 3 to rotate to release the steel cable 4 until the circular iron plate 7 falls to above the rammer 13. At this time, the steel cable 4 on the second-stage winch 3 is released, and the first-stage winch 2 tensions the steel cable 4 to ensure that the position of the circular iron plate 7 is stable and receives sufficient upward pulling force.

[0036] (S3) After the circular iron plate 7 falls above the rammer 13, the clutch mechanism is controlled to reconnect the motor 16 with the roller 15 of the second-stage winch 3, and the hook 10 on the circular iron plate 7 is hooked and connected with the groove 12 on the upper outer edge of the rammer 13 under the drive of the hydraulic mechanism 8; then the electromagnetic suction cup 11 is energized to electromagnetically adsorb the rammer 13.

[0037] (S4) Repeat steps S2 and S3, and repeat this process until the compaction of the entire foundation is completed.

[0038] The beneficial effects of this embodiment are:

[0039] (1) This device uses a hook and an electromagnetic suction cup to double-lift the rammer to ensure the installation safety. When releasing the rammer, the hook is first released from the rammer, and then the power is turned off to release the electromagnetic suction cup from the rammer. This decoupling method can avoid wear of the connecting parts and achieve lossless decoupling.

[0040] (2) This device uses a two-stage winch to hoist the rammer. A clutch mechanism is used on one stage of the winch so that when the rammer falls, the circular iron plate hoisted by the winch can fall synchronously, thereby realizing the rapid recovery of the rammer.

Claims

1. A working method of a safety unhooking and rapid recovery device for a dynamic compaction machine, which is arranged on the truss arm of the dynamic compaction machine, characterized in that The unhooking and quick recovery device includes a circular iron plate, an electromagnetic suction cup fixed to the lower surface of the circular iron plate, a plurality of hooks spaced apart on the outer edge of the circular iron plate, and a hoisting mechanism for suspending the circular iron plate. The electromagnetic suction cup electromagnetically attracts the upper surface of the rammer. The outer edge of the rammer is provided with a plurality of grooves for the hooks to be hooked. The tail end of the hook has a rod body, which is hinged to the outer edge of the circular iron plate and driven to rotate by a hydraulic mechanism. The hoisting mechanism includes a first-stage hoist and a second-stage hoist fixed on a rotatable platform of the ramming machine, a fixed pulley mechanism is provided at the top of the truss arm, the steel cable on the first-stage hoist is connected to the upper surface of the circular iron plate after passing through the second-stage hoist and the fixed pulley mechanism in sequence, and the winding length of the steel cable on the second-stage hoist is the descending height of the ramming hammer; The second-stage hoist is provided with a clutch mechanism, and the clutch mechanism and the electromagnetic chuck are controlled by the same control host; The working method of the decoupling and rapid recovery device comprises the following steps: (S1) controlling the truss arm of the dynamic tamping machine to rotate to the position directly above the rammer on the ground, controlling the circular iron plate to descend to the height of the rammer by means of a hoisting mechanism, and hooking the hook on the circular iron plate to the groove on the upper outer edge of the rammer under the drive of a hydraulic mechanism; then energizing the electromagnetic suction cup on the lower surface of the circular iron plate to electromagnetically attract the rammer; (S2) After the rammer is hooked and electromagnetically attracted, the rammer is lifted to the designed elevation position by the hoisting mechanism; then the hydraulic mechanism is controlled to drive the rod body of the hook to rotate to release the hooking and buckling of the rammer; after the hooking and buckling of the rammer are released, the electromagnetic suction cup is powered off to release the electromagnetic attraction of the rammer so that the rammer falls and hits the ground; 0.2-0.5 seconds after the electromagnetic suction cup is powered off, the transmission between the roller shaft and the motor of the second-stage hoist in the hoisting mechanism is released by the clutch mechanism; under the downward pull of the circular iron plate and the electromagnetic suction cup, the steel cable hoisting the circular iron plate drives the roller shaft of the second-stage hoist to rotate to release the steel cable until the circular iron plate falls above the rammer; (S3) After the circular iron plate falls to the top of the rammer, the clutch mechanism is controlled to reconnect the motor to the roller shaft of the second-stage winch, and the hook on the circular iron plate is driven by the hydraulic mechanism to be hooked and engaged with the groove on the upper outer edge of the rammer; then, the electromagnetic suction cup is energized to electromagnetically absorb the rammer; (S4) Repeat steps S2 and S3, and repeat this process until the compaction of the entire foundation is completed.

2. The working method of the safe uncoupling and rapid recovery device of a dynamic compaction machine according to claim 1 is characterized in that The electromagnetic chuck is powered by an external power grid.

3. The working method of the safe uncoupling and rapid recovery device of a dynamic compaction machine according to claim 1 is characterized in that At least three lifting holes are arranged at intervals along the circumference of the circular iron plate, and a lifting cable is passed through each lifting hole to be connected with the steel cable in the hoisting mechanism.

4. The working method of the safe uncoupling and rapid recovery device of a dynamic compaction machine according to claim 1 is characterized in that The number of the grooves on the outer edge of the rammer is twice the number of the hooks.

5. The working method of the safe unhooking and rapid recovery device of a dynamic compaction machine according to claim 1 is characterized in that The winding length of the steel cable on the second-stage winch is 9 / 10 of the designed elevation of the rammer.

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