Emergency unhooking device of dynamic compactor and emergency unhooking control method

Abstract

The invention discloses a dynamic compactor emergency unhooking device which comprises a winch and further comprises a winding mechanism, the winding mechanism comprises a winding shaft and an energy storage part, the winch is connected with the winding shaft through a connecting rope, the winding shaft is provided with a traction rope used for being connected with a lifting hook unlocking pull rod, a lifting hook is lifted, the winding shaft releases the traction rope, and the energy storage part stores energy. By arranging the winding mechanism, the winding mechanism is connected with the lifting hook unlocking pull rod, after the winch releases enough connecting ropes in advance, the release amount of the traction rope is controlled by the reel and the energy storage part in real time, the winch does not need to be controlled, operation is simplified, the energy storage part can serve as resistance, buffer the rammer and restrain the swing amplitude of the rammer, and the safety problem caused by the too large swing amplitude of the rammer is reduced.

Description

Technical Field

[0001] The invention relates to an emergency unhooking device for a dynamic compaction machine and also relates to a control method for the emergency unhooking device for a dynamic compaction machine. Background Art

[0002] When using a tamping machine for construction, the height of the tamping hammer is usually determined in advance, and the length of the traction rope is calculated. One end of the traction rope is tied to the turntable, and the other end is tied to the pull rod of the unhooker. When the tamping hammer reaches the preset height, the traction rope is straightened, thereby pulling the pull rod to release the tamping hammer. The disadvantage of this method is that the length of the traction rope needs to be readjusted for each working condition, which prolongs the operation time.

[0003] The invention patent application with publication number CN 117286862 A discloses an automatic unhooking tamping machine with adjustable tamping hammer drop distance. An unhooking rope winch, an unhooking device and an unhooking rope are installed on the tamping machine. The unhooking rope is wound on the unhooking rope winch, and the free end is connected to the unhooking device. When the tamping machine is hammering, the wire rope pulls the unhooking device and the tamping hammer to rise, and the motor drives the drum to rotate and release the rope, and the unhooking rope wound on the drum is pulled out. When the tamping hammer rises to a predetermined height, that is, the tamping hammer drop distance height, the control system obtains the hammer starting zero point rope output amount of the main winch lifting wire rope according to the tamping machine hammer starting zero point signal; when the rope retraction amount of the main winch lifting wire rope reaches the tamping hammer drop distance height, it is determined that the rope output amount of the unhooking rope reaches the tamping hammer drop distance height, and the control system controls the motor to stop rotating according to the hammer release signal. At this time, the unhooking device automatically unhooks under the tension of the unhooking rope, and the tamping hammer falls freely. In this scheme, the amount of rope output is determined according to the height of the rammer landing, and the amount of rope output needs to be controlled in real time, and the operation procedure is complicated. Generally, the weight of the rammer is greater than 50 tons, and the weight of the rammer is greater than 20 tons. With the increasing demand for construction efficiency, the weight of the rammer and the rammer is also increasing. At present, the weight of the largest rammer has exceeded 120 tons, and the weight of the rammer has reached 80 tons. Such a large weight will cause the whole machine to tilt and the rammer to swing due to ground collapse, and the center of gravity of the whole machine will shift to one side. If the rammer cannot be released in time, it may roll over. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide an emergency uncoupling device for a dynamic tamping machine with simplified operation; another purpose of the present invention is to provide a control method for the emergency uncoupling device of a dynamic tamping machine to improve construction safety.

[0005] Technical solution: The emergency unhooking device of a tamping machine described in the present invention includes a winch and a winding mechanism. The winding mechanism includes a reel and an energy storage member. The winch is connected to the reel through a connecting rope. The reel is provided with a traction rope for connecting a hook unlocking rod. When the hook is lifted, the reel releases the traction rope and the energy storage member stores energy.

[0006] Preferably, an amplitude sensor is provided on the reel shaft.

[0007] Preferably, in order to reduce the influence of gravity on the reel amplitude detection, the emergency unhooking device of the dynamic tamping machine also includes a pulley, and the traction rope and the hook unlocking rod are connected to bypass the pulley.

[0008] Preferably, the hoist includes a hoisting motor, a brake, an electromagnetic reversing valve for controlling the oil inlet direction of the hoisting motor, and an electromagnetic control valve for controlling the braking of the brake. The electromagnetic reversing valve, the electromagnetic control valve, and the amplitude sensor are all connected to the controller.

[0009] Preferably, the emergency unhooking device of the dynamic tamping machine further comprises an angle sensor for detecting the lifting angle of the main arm of the dynamic tamping machine, and the angle sensor is connected to the controller.

[0010] Preferably, a guide groove for guiding the traction rope is provided on the reel.

[0011] Preferably, the energy storage member is located at one end or both ends of the reel.

[0012] Preferably, the oil inlet end of the electromagnetic control valve is connected to a pressure reducing valve.

[0013] The control method of the emergency uncoupling device of the dynamic tamping machine is characterized by comprising the following steps:

[0014] (1) Obtain the angle α between the main arm and the turntable, the length L1 from the bottom to the top of the main arm of the compaction machine, the distance L2 from the pulley to the reel, the end height of the hook lifting L3, and control the winch to pre-release the connecting rope L meters:

[0015]

[0016] Get the winch diameter d and preset the minimum speed n2 for recovering the traction rope when the winch is turned on:

[0017]

[0018] Get the amplitude A0 of the reel when it is unhooked normally;

[0019] (2) If the amplitude sensor measures the amplitude A 实 >A0, the controller sends an electrical signal to the electromagnetic reversing valve and the electromagnetic control valve, and the winch pulls the reel to rotate and retract the traction rope.

[0020] Preferably, the amplitude A0 is less than 0.15 mm.

[0021] Beneficial effects: Compared with the prior art, the present invention has the following advantages: 1. Simplified control: by setting a winding mechanism, the winding mechanism is connected to the hook unlocking rod, and after the winch releases a sufficient amount of connecting rope in advance, the release amount of the traction rope is controlled in real time by the reel and the energy storage component. There is no need to operate the winch, thereby simplifying the operation; 2. Constraining the rammer: the energy storage component can serve as resistance, buffer the rammer, constrain the swing amplitude of the rammer, and reduce the safety problems caused by the excessive swing amplitude of the rammer; 3. Quick response and improved safety: the winch has a preset initial speed to ensure that the rammer is released in time. At the same time, when the rammer is lifted, the connecting rope is wound around the winding mechanism, and the length of the connecting rope that drives the reel to rotate is shortened. The response time of the winch to drive the reel to rotate and tighten the traction rope is shortened, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the emergency unhooking device of the present invention;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the winding mechanism of the present invention;

[0024] Figure 3 It is a front view of the winding mechanism of the present invention;

[0025] Figure 4 It is a schematic diagram of the unhooking process of the emergency unhooking device of the present invention;

[0026] Figure 5 It is a schematic diagram of the pulley structure of the emergency unhooking device of the present invention;

[0027] Figure 6 It is a structural principle diagram of the winch of the emergency unhooking device of the present invention;

[0028] Figure 7 It is a schematic diagram of parameter acquisition of the control method of the emergency uncoupling device of the dynamic compaction machine of the present invention. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0030] Example 1: Figures 1 to 4As shown, the emergency unhooking device includes a winch 6 and a reeling mechanism 9. The reeling mechanism 9 is located above the winch 6. The reeling mechanism 9 is mainly composed of a reel 91 and an energy storage member 96. The winch 6 is connected to the reel 91 through a connecting rope 63 (not shown). A traction rope 95 is provided on the reel 91. The traction rope 95 is used to connect the hook unlocking rod. After the winch 6 releases a sufficient length of the traction rope, when the hook is lifted, the reel 91 releases the traction rope 95, and the energy storage member 96 stores energy. If the traction rope between the reel 91 and the hook is loose, the energy storage member pulls back the traction rope. The traction rope released by the reel 9 is controlled by the energy storage member 96. The length is limited, which can constrain the rammer to prevent the rammer from swinging excessively, avoid the rammer from swinging when the vehicle body tilts forward, and avoid tipping caused by the change of the force arm. It can also prevent the traction rope from sagging to the ground and affecting the lifting process of the rammer. The reel 91 is provided with an amplitude sensor (not shown).

[0031] The reel 91 is provided with a spiral groove 92 (not marked) for guiding the traction rope. The traction rope 95 is located in the spiral groove 92 to prevent the traction rope from being messy. The two ends of the reel 91 are connected to the vehicle body through the bracket 93. An energy storage member 96 is arranged between the reel 91 and the bracket. When the reel 91 rotates around the bracket to release the traction rope, the energy storage member 96 stores energy, and the rammer is released. When the hook descends, the energy storage member 96 releases energy to recover the traction rope. The energy storage member 96 can be a coil spring, one end of which is connected to the reel and the other end is connected to the bracket 93. The two ends of the reel 91 extend out of the bracket 93. The end of the reel 91 extending out of the bracket 93 can also be provided with an energy storage member 96. Here, the energy storage member and the reel 91 and the bracket 93 are detachably connected, so as to adjust the tension of the winding mechanism 9 according to the working conditions and the lifting height of the rammer.

[0032] like Figure 5 The emergency unhooking device may further include a pulley 10, which is mounted on the main arm of the tamping machine. After the traction rope 95 passes around the pulley, it is connected to the hook pull rod. The pulley 10 helps to reduce the impact of the deadweight of the traction rope 95 on the hook and the reel 91, and can also reduce the number of energy storage parts of the winding mechanism. A part of the traction rope 95 can be wound on the winding mechanism, and the other part can be guided by the pulley 10.

[0033] In order to prevent the emergency unhooking system from being interfered with by other systems, the emergency unhooking device is powered by a separate gear pump 1, such as Figure 6The control system of the winch 6 includes an oil inlet channel 11, an oil return channel 12, a winch motor 61, and a brake 62. The pressure port of the gear pump 1 is connected to the P port of the electromagnetic overflow valve 2 through the oil inlet channel 11. The A and B ports of the winch motor 61 are connected to the oil inlet channel 11 and the oil return channel 12 through the A and B ports of the electromagnetic reversing valve 5 to control the connection between the A port or the B port and the oil inlet channel 11, and the other port returns oil to control the rotation direction of the winch motor 61. The inlet end of the brake 62 is connected to the oil inlet channel 11 through the brake oil channel 13. A pressure reducing valve 3 and an electromagnetic brake valve 4 are provided on the brake oil channel 13. The A port of the electromagnetic brake valve 4 is connected to the C port of the brake 62. An electromagnetic overflow valve 2 is provided on the oil inlet channel 11. The electromagnetic overflow valve 2 includes an adjustable overflow valve 21. The A port of the electromagnetic overflow valve 2 is connected to the P port of the electromagnetic reversing valve 5 and the P port of the pressure reducing valve 3. The electromagnetic overflow valve 2 prevents the system from being pressurized. The electromagnetic reversing valve 5 and the electromagnetic brake valve 4 are connected to a controller (not shown), and an angle sensor is provided at the bottom of the main arm, which is also connected to the controller. An oil return passage 14 is provided between the electromagnetic brake valve 4 and the oil tank 8, and the T port of the electromagnetic reversing valve 5, the L port of the hoisting motor, the T port of the electromagnetic brake valve 5, the T port of the pressure reducing valve, and the oil return port of the brake 62 are connected to the oil tank 8 through the oil passage 14.

[0034] During use, when the traction rope 95 on the traction mechanism 9 is released, part of the connecting rope will be wound onto the winding mechanism 9, and the connecting rope between the reel 91 and the winch 6 will be shortened. Once a large swing occurs, the length of the connecting rope that the winder 6 needs to wind up will be shortened, which can shorten the response time of the rammer to unhook.

[0035] Embodiment 2: A control method for an emergency unhooking device comprises the following steps:

[0036] (1) Figure 7 , obtain the angle α between the main arm and the turntable, the length L1 (unit: m) from the bottom to the top of the main arm of the dynamic tamping machine, the distance L2 from the pulley 10 to the reel 9, the end height of the hook lifting L3, and control the winch to pre-release the connecting rope L meters:

[0037]

[0038] Get the winch diameter d (unit: m). If the rammer swings sharply when just lifting, the winch needs to recover all the connecting ropes. Considering that the time from tilting to vehicle rollover is very short, the longest time t (unit: s) for emergency unhooking should be less than 2s. From this, the minimum speed n2 (unit: rpm) for recovering the traction rope can be obtained:

[0039]

[0040] When the winch is turned on, the minimum speed n2 of the retracting traction rope is preset, and the amplitude A0 of the reel is obtained when the hook is normally unhooked;

[0041] (2) If the amplitude sensor measures the amplitude A 实 >A0, the controller sends an electrical signal to the electromagnetic reversing valve and the electromagnetic control valve, the winch pulls the reel to rotate and retracts the traction rope. The amplitude A0 is preferably less than 0.15m.

Claims

1. An emergency uncoupling device for a dynamic compaction machine, comprising a winch (6), characterized in that: The invention also comprises a winding mechanism, wherein the winding mechanism comprises a winding shaft (91) and an energy storage member (96); the hoist is connected to the winding shaft (91) via a connecting rope; a traction rope (95) for connecting to a hook unlocking pull rod is provided on the winding shaft (91); when the hook is lifted, the winding shaft (91) releases the traction rope and the energy storage member (96) stores energy.

2. The emergency unhooking device for a dynamic compaction machine according to claim 1, characterized in that: The emergency unhooking device of the dynamic tamping machine also includes a pulley (10), and when the traction rope (95) is connected to the hook unlocking pull rod, it passes around the pulley (10).

3. The emergency unhooking device for a dynamic compaction machine according to claim 2, characterized in that: An amplitude sensor is provided on the rotating shaft of the reel (91).

4. The emergency unhooking device for a dynamic compaction machine according to claim 3, characterized in that: The hoist (6) comprises a hoisting motor (61), a brake (62), an electromagnetic reversing valve (5) for controlling the oil inlet direction of the hoisting motor, and an electromagnetic control valve (4) for controlling the braking of the brake. The electromagnetic reversing valve (5), the electromagnetic control valve (4), and the amplitude sensor are all connected to a controller.

5. The emergency unhooking device for a dynamic compaction machine according to claim 4, characterized in that: The emergency unhooking device of the dynamic tamping machine also includes an angle sensor for detecting the lifting angle of the main arm of the dynamic tamping machine, and the angle sensor is connected to the controller.

6. The emergency unhooking device for a dynamic compaction machine according to claim 1, characterized in that: The reel (91) is provided with a guide groove for guiding the traction rope (95).

7. The emergency unhooking device for a dynamic compaction machine according to claim 1, characterized in that: The energy storage member (96) is located at one end or both ends of the reel (91).

8. The emergency unhooking device for a dynamic compaction machine according to claim 1, characterized in that: The oil inlet end of the electromagnetic control valve (4) is connected to a pressure reducing valve (3).

9. The control method of the emergency unhooking device of the dynamic compaction machine according to claim 4, characterized in that: The following steps are involved: (1) Obtain the angle α between the main arm and the turntable, the length L1 from the bottom to the top of the main arm of the compaction machine, the distance L2 from the pulley to the reel, the end height of the hook lifting L3, and control the winch to pre-release the connecting rope L meters: Get the winch diameter d and preset the minimum speed n2 for recovering the traction rope when the winch is turned on: Get the amplitude A0 of the reel when it is unhooked normally; (2) If the amplitude sensor measures the amplitude A 实 >A0, the controller sends an electrical signal to the electromagnetic reversing valve and the electromagnetic control valve, and the winch pulls the reel to retract the traction rope.

10. The control method according to claim 9, characterized in that: The amplitude A0 is less than 0.15 m.

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