Shipborne electric variable-amplitude crane with lifting and variable-amplitude double-steel-wire-rope linkage safety protection function

Abstract

The invention discloses a shipborne electric variable-amplitude crane with lifting and variable-amplitude double-steel-wire-rope linkage safety protection. The shipborne electric variable-amplitude crane comprises an electric variable-amplitude crane body and a double-steel-wire-rope linkage safety protection device. The electric luffing crane is provided with a lifting steel wire rope and a luffing steel wire rope; the double-steel-wire-rope linkage safety protection device comprises a guide rail fixed relative to the suspension arm, a first rope guide barrel through which a lifting steel wire rope penetrates and a second rope guide barrel through which a variable-amplitude steel wire rope penetrates are arranged on the guide rail in a sliding mode, and the first rope guide barrel and the second rope guide barrel are connected through an elastic supporting part and are in a linkage state. A first pressure telescopic rod is arranged between the first rope guide barrel and an end base of the guide rail, and a second pressure telescopic rod is arranged between the second rope guide barrel and an end cover of the guide rail. The hoisting steel wire rope and the variable-amplitude steel wire rope are in traction linkage through the double-steel-wire-rope linkage safety protection device, the state of any steel wire rope can be accurately detected, rope correction and return are conducted under the condition that any steel wire rope deviates from a rail, and the operation safety of the shipborne electric variable-amplitude crane is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electric luffing cranes, and in particular relates to a ship-borne electric luffing crane with double steel wire rope linkage safety protection for lifting and luffing. Background Art

[0002] The ship-borne electric luffing crane is a kind of lifting machinery installed on the ship, which is mainly used for loading and unloading cargo. According to the swing drive mode, it can be roughly divided into the cylinder-driven electric luffing crane and the rope-pulled electric luffing crane. The rope-pulled electric luffing crane has the advantage of a large swing amplitude and is widely used in ship cargo lifting operations. At the same time, the rope-pulled electric luffing crane also has defects. For example, during the cargo lifting operation, affected by the swaying of the ship and the rotation of the electric luffing crane itself, the lifting wire rope or the luffing wire rope has a probability of coming off the wheel and deviating from the track in the vertical direction, which brings safety hazards to the lifting operation of the ship-borne electric luffing crane. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a ship-borne electric luffing crane with double steel wire rope linkage safety protection for lifting and luffing. The lifting steel wire rope and the luffing steel wire rope are pulled together by a double steel wire rope linkage safety protection device, and the state of any steel wire rope can be accurately detected. In the event that any steel wire rope deviates from the track, the rope can be corrected and returned to the right position, thereby improving the operating safety of the ship-borne electric luffing crane.

[0004] Technical solution: To achieve the above-mentioned purpose, the shipborne electric luffing crane with lifting and luffing double wire rope linkage safety protection of the present invention comprises an electric luffing crane and a double wire rope linkage safety protection device installed on the boom of the electric luffing crane; the electric luffing crane has a lifting wire rope along the boom and a luffing wire rope for pulling the boom to swing up and down; the double wire rope linkage safety protection device comprises a guide rail fixedly arranged relative to the boom, a first guide rope drum through which the lifting wire rope passes and a second guide rope drum through which the luffing wire rope passes are slidably arranged on the guide rail, the first guide rope drum and the second guide rope drum are connected by an elastic support part, so that the lifting wire rope and the luffing wire rope are in a linkage state through the traction of the elastic support part; a first pressure telescopic rod is arranged between the first guide rope drum and the end seat of the guide rail, and a second pressure telescopic rod is arranged between the second guide rope drum and the end cover of the guide rail, and the first pressure telescopic rod and the second pressure telescopic rod respectively include a passive telescopic state driven by the force transmission of the elastic support part and an active telescopic state driven by the change of their own structure.

[0005] Furthermore, the first pressure telescopic rod and the second pressure telescopic rod are both pneumatic telescopic structural rods with a pressure-variable cavity;

[0006] The pneumatic telescopic structural rod is connected to a pressure sensor corresponding to its variable pressure cavity. When the lifting wire rope or the variable amplitude wire rope deviates from the corresponding retracting and releasing rope direction, the first pressure telescopic rod and the second pressure telescopic rod are driven to passively telescope through the linkage of the elastic support part. The pressure sensor is used to detect the pressure of the variable pressure cavity of the corresponding pneumatic telescopic structural rod;

[0007] The pneumatic telescopic structural rod is connected to a three-way pipe corresponding to its variable pressure cavity, and the three-way pipe is connected to an inflation electric valve and an exhaust electric valve. The inflation electric valve is connected to the inflation power part through an inflation pipeline, and the exhaust electric valve is connected to the exhaust power part through an exhaust pipeline. The pressure of the variable pressure cavity is changed by inflation of the inflation power part or exhaustion of the exhaust power part, so that the pneumatic telescopic structural rod is actively extended and retracted, thereby driving the lifting wire rope and the variable amplitude wire rope to return to the corresponding rope retraction and release direction state.

[0008] Furthermore, the first rope guide drum and the second rope guide drum are respectively installed on the slide seat of the guide rail, the two ends of the elastic support part are respectively connected to the slide seat of the first rope guide drum and the slide seat of the second rope guide drum, the two ends of the first pressure telescopic rod are respectively connected to the end seat of the guide rail and the slide seat of the first rope guide drum, and the two ends of the second pressure telescopic rod are respectively connected to the end cover of the guide rail and the slide seat of the second rope guide drum.

[0009] Furthermore, the elastic supporting portion is composed of an outer telescopic sleeve sleeved outside the pressure sensor spring.

[0010] Furthermore, the first rope guide drum and the second rope guide drum are both provided with rope lockers, and the hoisting wire rope can be released and locked relative to the first rope guide drum through the corresponding rope lockers, and the luffing wire rope can be released and locked relative to the second rope guide drum through the corresponding rope lockers;

[0011] When the first rope guide drum is in the rope guiding state, the rope locker is in the rope releasing state; when the first rope guide drum is in the rope calibrating and returning state, the rope locker is in the rope locking state;

[0012] When the second rope guide drum is in the rope guiding state, the rope lock device is in the rope releasing state; when the second rope guide drum is in the rope calibrating and returning state, the rope lock device is in the rope locking state.

[0013] Furthermore, the plurality of rope locks on the first rope guide drum are staggered on both sides of the drum body so that the lifting wire rope can be pressed along a curved trajectory to fit the inner wall of the first rope guide drum when locking the rope; the plurality of rope locks on the second rope guide drum are staggered on both sides of the drum body so that the variable amplitude wire rope can be pressed along a curved trajectory to fit the inner wall of the second rope guide drum when locking the rope.

[0014] Furthermore, the rope lock includes a rope pressing cylinder, a rope pressing end of the rope pressing cylinder extends into the interior of the corresponding rope guide cylinder from the radial direction, and the rope pressing end of the rope pressing cylinder is a dome structure with friction lines distributed on the surface.

[0015] Furthermore, the electric luffing crane also includes a base, a slewing mechanism assembly and a tower; the root of the boom is hinged to the tower, and the head of the boom is provided with a head guide rope pulley, and the lifting wire rope led out from the lifting winch installed on the boom is connected to the hook pulley in sequence through the first guide rope drum and the head guide rope pulley; a tower pulley block is provided on the top of the tower, and the head of the boom is provided with a boom head luffing pulley block, and the luffing wire rope led out from the luffing winch installed on the tower is connected to the tower after passing through the tower pulley block, the second guide rope drum and the boom head luffing pulley block in sequence.

[0016] Beneficial effect: The present invention uses a double-wire rope linkage safety protection device to pull the lifting wire rope and the luffing wire rope together. Affected by the swaying of the ship and the rotating action of the electric luffing crane itself, when a wire rope is off the wheel or deviates from the track, it can be detected by the two pressure telescopic rods according to the pressure change, that is, the passive telescopic state, so that the state of any wire rope can be accurately detected. When any wire rope deviates from the track, the active telescopic state of the telescopic rod is used to calibrate the rope and return it to the correct position, thereby improving the operating safety of the ship-borne electric luffing crane, and being suitable for large-scale promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the electric luffing crane of the present invention;

[0018] Figure 2 It is a schematic diagram of the overall structure of the double steel wire rope linkage safety protection device;

[0019] Figure 3 It is a schematic diagram of the structure of the double steel wire rope linkage safety protection device in a partially exploded state;

[0020] Figure 4 This is a schematic diagram of the enlarged structure of part of the double wire rope linkage safety protection device. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] like Figure 1 , Figure 2 as well as Figure 3As shown, a ship-borne electric luffing crane with double steel wire rope linkage safety protection for lifting and luffing comprises an electric luffing crane 1 and a double steel wire rope linkage safety protection device 13 installed on the boom 4 of the electric luffing crane 1; the electric luffing crane 1 comprises a lifting steel wire rope 5 running along the boom 4 and a luffing steel wire rope 6 pulling the boom 4 to swing up and down; the double steel wire rope linkage safety protection device 13 comprises a guide rail 14 fixedly arranged relative to the boom 4, a first guide rope drum 15 through which the lifting steel wire rope 5 passes and a second guide rope drum 16 through which the luffing steel wire rope 6 passes are slidably arranged on the guide rail 14, the first The guide rope drum 15 is connected to the second guide rope drum 16 through an elastic support part 19, so that the lifting wire rope 5 and the variable-length wire rope 6 are in a linkage state through the traction of the elastic support part 19; a first pressure telescopic rod 17 is arranged between the first guide rope drum 15 and the end seat 140 of the guide rail 14, and a second pressure telescopic rod 18 is arranged between the second guide rope drum 16 and the end cover 141 of the guide rail 14. The first pressure telescopic rod 17 and the second pressure telescopic rod 18 respectively include a passive telescopic state driven by the force transmission of the elastic support part 19 and an active telescopic state driven by their own structural changes. The present invention uses a double-wire rope linkage safety protection device 13 to pull the lifting wire rope 5 and the luffing wire rope 6 in a linked manner. Affected by the swaying of the ship and the rotating action of the electric luffing crane itself, when a wire rope is derailed or derailed, it can be detected by the two pressure telescopic rods according to the pressure change, that is, the passive telescopic state, so that the state of any wire rope can be accurately detected. When any wire rope is derailed, the active telescopic state of the telescopic rod is used to calibrate the rope and correct it, thereby improving the operating safety of the ship-borne electric luffing crane.

[0023] More specifically, Figure 1 The electric luffing crane also includes a base 1, a slewing mechanism assembly 2 and a tower 3; the root of the boom 4 is hinged to the tower 3, and the head of the boom 4 is provided with a head guide rope pulley 8, and the lifting wire rope 5 led out from the lifting winch 7 installed on the boom 4 is connected to the hook pulley 9 in sequence through the first guide rope drum 15 and the head guide rope pulley 8; the top of the tower 3 is provided with a tower pulley block 11, and the head of the boom 4 is provided with a boom head luffing pulley block 12, and the luffing wire rope 6 led out from the luffing winch 10 installed on the tower 3 is connected to the tower 3 after passing through the tower pulley block 11, the second guide rope drum 16, and the boom head luffing pulley block 12.

[0024] As 2, Figure 3 as well as Figure 4As shown, the first pressure telescopic rod 17 and the second pressure telescopic rod 18 are both pneumatic telescopic structural rods with pressure-variable cavities; the pneumatic telescopic structural rod is connected to a pressure sensor 35 corresponding to its pressure-variable cavity, and the lifting wire rope 5 or the variable-length wire rope 6 drives the first pressure telescopic rod 17 and the second pressure telescopic rod 18 to passively telescope through the linkage of the elastic support part 19 when deviating from the corresponding direction of the retracted and released ropes, and the pressure sensor 35 is used to detect the pressure of the pressure-variable cavity of the corresponding pneumatic telescopic structural rod; when the lifting wire rope 5 or the variable-length wire rope 6 derails in the vertical direction, due to the linkage action of the elastic support part 19, the first guide rope drum 15 and the second guide rope drum 16 will have a linkage movement reaction, thereby driving the first pressure telescopic rod 17 and the second pressure telescopic rod 18 to produce passive action and cause internal pressure changes, thereby improving the sensitivity and accuracy of detecting wire rope derailment. The pneumatic telescopic structure rod is connected with a three-way pipe 30 corresponding to its variable pressure cavity, and the three-way pipe 30 is connected with an inflating electric valve 31 and an exhausting electric valve 33. The inflating electric valve 31 is connected to the inflating power unit 32 through an inflating pipeline, and the exhausting electric valve 33 is connected to the exhausting power unit 34 through an exhausting pipeline. The pressure of the variable pressure cavity is changed by inflating the inflating power unit 32 or exhausting the exhausting power unit 34, so that the pneumatic telescopic structure rod is actively extended and retracted, so as to drive the lifting wire rope 5 and the variable amplitude wire rope 6 to return to the corresponding rope retracting and releasing direction state. When the wire rope is detected to be off track, the first pressure telescopic rod 17 and the second pressure telescopic rod 18 will immediately take the initiative to correct the wire rope to the correct guide rope track to ensure the safety of the lifting operation.

[0025] The first rope guide drum 15 and the second rope guide drum 16 are respectively mounted on the slide 142 of the guide rail 14, the two ends of the elastic support part 19 are respectively connected to the slide 142 of the first rope guide drum 15 and the slide 142 of the second rope guide drum 16, the two ends of the first pressure telescopic rod 17 are respectively connected to the end seat 140 of the guide rail 14 and the slide 142 of the first rope guide drum 15, and the two ends of the second pressure telescopic rod 18 are respectively connected to the end cover 141 of the guide rail 14 and the slide 142 of the second rope guide drum 16. The elastic support part 19 also has the advantage that when the steel wire rope belonging to one of the first rope guide drum 15 and the second rope guide drum 16 deviates from the track, the other rope guide drum will also be pulled, but based on the elastic operation of the elastic support part 19, the steel wire rope normally on the track will not be pulled to deviate from the track, and will only be pulled to drive the pressure of the pressure telescopic rod to change, thereby using the double pressure telescopic rod to realize the scheme of accurately detecting the deviating track of the steel wire rope.

[0026] In order to further improve the manifestation of wire rope derailment in data and further improve the accuracy, in the present invention, the elastic support part 19 is composed of an outer telescopic sleeve on the outside of the pressure sensor spring.

[0027] It is worth noting that when aligning the deviated wire rope, the wire rope and the guide rope drum need to be relatively fixed to achieve a better alignment effect. Figure 2 and Figure 3 As shown, the first rope guide drum 15 and the second rope guide drum 16 are both provided with a rope lock 20, and the lifting wire rope 5 can be released and locked relative to the first rope guide drum 15 through the corresponding rope lock 20, and the variable amplitude wire rope 6 can be released and locked relative to the second rope guide drum 16 through the corresponding rope lock 20; when the first rope guide drum 15 is in the rope guiding state, the rope lock 20 is in the rope releasing state; when the first rope guide drum 15 is in the rope adjusting and returning state, the rope lock 20 is in the rope locking state; when the second rope guide drum 16 is in the rope guiding state, the rope lock 20 is in the rope releasing state; when the second rope guide drum 15 is in the rope adjusting and returning state, the rope lock 20 is in the rope locking state.

[0028] The plurality of rope lockers 20 on the first rope guide drum 15 are staggered on both sides of the drum body so that the lifting wire rope 5 can be pressed along a curved trajectory to fit the inner wall of the first rope guide drum 15 when locking the rope, so as to improve the tightness of the rope locking; the plurality of rope lockers 20 on the second rope guide drum 16 are staggered on both sides of the drum body so that the amplitude-changing wire rope 6 can be pressed along a curved trajectory to fit the inner wall of the second rope guide drum 16 when locking the rope, so as to improve the tightness of the rope locking.

[0029] like Figure 4 As shown, the rope lock 20 includes a rope pressing cylinder 201, the rope pressing end of the rope pressing cylinder 201 extends into the interior of the corresponding rope guide cylinder from the radial direction, and the rope pressing end of the rope pressing cylinder 201 is a dome structure 202 with friction lines distributed on the surface.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. Shipborne electric luffing crane with double steel wire rope linkage safety protection for lifting and luffing, Features: The invention comprises an electric luffing crane (1) and a double-wire rope linkage safety protection device (13) installed on a boom (4) of the electric luffing crane (1); the electric luffing crane (1) comprises a lifting wire rope (5) running along the boom (4) and a luffing wire rope (6) pulling the boom (4) to swing up and down; the double-wire rope linkage safety protection device (13) comprises a guide rail (14) fixedly arranged relative to the boom (4); a first rope guide drum (15) through which the lifting wire rope (5) passes and a second rope guide drum (16) through which the luffing wire rope (6) passes are slidably arranged on the guide rail (14); the first rope guide drum (15) and the second rope guide drum (16) are connected to each other by a plurality of means. 6) are connected by an elastic support part (19), so that the lifting wire rope (5) and the variable-length wire rope (6) are in a linkage state through the traction of the elastic support part (19); a first pressure telescopic rod (17) is arranged between the first guide rope drum (15) and the end seat (140) of the guide rail (14), and a second pressure telescopic rod (18) is arranged between the second guide rope drum (16) and the end cover (141) of the guide rail (14), and the first pressure telescopic rod (17) and the second pressure telescopic rod (18) respectively include a passive telescopic state driven by the force transmission of the elastic support part (19) and an active telescopic state driven by the change of their own structure.

2. The shipborne electric luffing crane with double steel wire rope linkage safety protection for lifting and luffing according to claim 1, Features: The first pressure telescopic rod (17) and the second pressure telescopic rod (18) are both pneumatic telescopic structural rods with a pressure-variable cavity; The pneumatic telescopic structure rod is connected to a pressure sensor (35) corresponding to its variable pressure cavity. When the lifting steel wire rope (5) or the variable amplitude steel wire rope (6) deviates from the corresponding retracting and releasing rope direction, the first pressure telescopic rod (17) and the second pressure telescopic rod (18) are driven to passively telescope through the linkage of the elastic support part (19). The pressure sensor (35) is used to detect the pressure of the variable pressure cavity of the corresponding pneumatic telescopic structure rod; The pneumatic telescopic structural rod is connected to a three-way pipe (30) corresponding to its variable pressure cavity, and an inflation electric valve (31) and an exhaust electric valve (33) are connected to the three-way pipe (30). The inflation electric valve (31) is connected to the inflation power unit (32) through an inflation pipeline, and the exhaust electric valve (33) is connected to the exhaust power unit (34) through an exhaust pipeline. The pressure of the variable pressure cavity is changed by inflation of the inflation power unit (32) or exhaust of the exhaust power unit (34), so that the pneumatic telescopic structural rod is actively extended and retracted, thereby driving the lifting wire rope (5) and the variable amplitude wire rope (6) to return to the corresponding rope retracting and releasing direction state.

3. The shipborne electric luffing crane with double steel wire rope linkage safety protection for lifting and luffing according to claim 2, Features: The first rope guide cylinder (15) and the second rope guide cylinder (16) are respectively mounted on the slide seat (142) of the guide rail (14); the two ends of the elastic support portion (19) are respectively connected to the slide seat (142) of the first rope guide cylinder (15) and the slide seat (142) of the second rope guide cylinder (16); the two ends of the first pressure telescopic rod (17) are respectively connected to the end seat (140) of the guide rail (14) and the slide seat (142) of the first rope guide cylinder (15); the two ends of the second pressure telescopic rod (18) are respectively connected to the end cover (141) of the guide rail (14) and the slide seat (142) of the second rope guide cylinder (16).

4. The shipborne electric luffing crane with double steel wire rope linkage safety protection for lifting and luffing according to claim 3, Features: The elastic supporting part (19) is composed of a pressure sensor spring with an outer telescopic sleeve sleeved outside.

5. The shipborne electric luffing crane with double steel wire rope linkage safety protection for lifting and luffing according to claim 3, Features: The first rope guide drum (15) and the second rope guide drum (16) are both provided with rope lockers (20), and the lifting wire rope (5) can be released and locked relative to the first rope guide drum (15) through the corresponding rope lockers (20), and the variable amplitude wire rope (6) can be released and locked relative to the second rope guide drum (16) through the corresponding rope lockers (20); When the first rope guide drum (15) is in the rope guiding state, the rope locker (20) is in the rope releasing state; when the first rope guide drum (15) is in the rope calibrating and returning state, the rope locker (20) is in the rope locking state; When the second rope guide drum (16) is in the rope guiding state, the rope locker (20) is in the rope releasing state; when the second rope guide drum (15) is in the rope calibrating and returning state, the rope locker (20) is in the rope locking state.

6. The shipborne electric luffing crane with double steel wire rope linkage safety protection for lifting and luffing according to claim 5, Features: A plurality of rope lockers (20) on the first rope guide drum (15) are staggered and distributed on both sides of the drum body, so that when locking the rope, the lifting wire rope (5) is pressed along a curved trajectory to fit the inner wall of the first rope guide drum (15); a plurality of rope lockers (20) on the second rope guide drum (16) are staggered and distributed on both sides of the drum body, so that when locking the rope, the variable amplitude wire rope (6) is pressed along a curved trajectory to fit the inner wall of the second rope guide drum (16).

7. The shipborne electric luffing crane with double steel wire rope linkage safety protection for lifting and luffing according to claim 6, Features: The rope lock (20) comprises a rope pressing cylinder (201), the rope pressing end of the rope pressing cylinder (201) extends radially into the interior of the corresponding rope guide cylinder, and the rope pressing end of the rope pressing cylinder (201) is a dome structure (202) with friction lines distributed on the surface.

8. The shipborne electric luffing crane with double steel wire rope linkage safety protection for lifting and luffing according to claim 6, Features: The electric variable-length crane also includes a base (1), a slewing mechanism assembly (2) and a tower (3); the root of the boom (4) is hinged to the tower (3); the head of the boom (4) is provided with a head guide rope pulley (8); a lifting wire rope (5) drawn from a lifting winch (7) installed on the boom (4) is connected to a hook pulley (9) in sequence through a first guide rope drum (15) and the head guide rope pulley (8); a tower pulley block (11) is provided at the top of the tower (3); a boom head variable-length pulley block (12) is provided at the head of the boom (4); a variable-length wire rope (6) drawn from a variable-length winch (10) installed on the tower (3) is connected to the tower (3) in sequence through a tower pulley block (11), a second guide rope drum (16) and the boom head variable-length pulley block (12).

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