A device and method for assisting overhead cranes in cargo lifting.

Abstract

The present invention provides a device for assisting aerial cargo lifting, which is used to place cargo into a vertical shaft below an obstacle, and includes a control box, a chain, a gear mechanism, a connecting plate, a first pulley, a second pulley, and a lifting rope. The connecting plate is arranged between the first pulley and the second pulley. The first pulley and the second pulley are internally slidably connected with a lifting rope. The cargo is arranged below the first pulley. The control box is arranged above the obstacle. The control box is connected by a chain and a gear mechanism. The gear mechanism is arranged on the connecting plate. The present invention also provides an auxiliary aerial cargo lifting method using the above-mentioned device for assisting aerial cargo lifting. The present invention adjusts the direction and height of the hoisted cargo by rotating the pulley, thereby achieving accurate delivery of the cargo, effectively avoiding the friction between the rope and the obstacle, and improving the safety and stability during operation.

Description

Technical Field

[0001] The invention belongs to the technical field of lifting, and in particular relates to a device and method for assisting aerial crane cargo lifting. Background Art

[0002] Overhead crane, also called bridge crane, is a bridge crane. The crane mentioned here is actually the abbreviation of lifting machine. Lifting machines are divided into two types according to their structural characteristics: bridge crane and jib crane. Bridge crane belongs to bridge crane. If divided by driving form, bridge crane is generally an electric crane. If divided by mobility, bridge crane belongs to non-mobile crane.

[0003] In some sites, it is necessary to use an overhead crane to place the cargo steadily into a vertical shaft under an obstacle. Pulling the cargo directly will cause the rope to rub against the obstacle, which is unsafe and also causes the cargo to be unstable, making it impossible to accurately place the cargo in the target location.

[0004] Especially in nuclear power plants, during the maintenance of the nuclear island, it is necessary to use an aerial crane to replace RPN system fault detectors, etc., but the detector instrument well is under the cable tray of the nuclear island and cannot be directly lifted by an aerial crane. Directly pulling the cargo or lifting rope will cause friction between the rope and the cable tray (obstacle), which can easily cause radioactive dust pollution and unnecessary radiation doses for workers, and also lead to the instability of the detector (cargo), which can easily cause damage to the detector (cargo), and the detector (cargo) cannot be accurately placed in the instrument well (target position).

[0005] Therefore, there is an urgent need to design a device and method for assisting aerial crane cargo lifting. Summary of the invention

[0006] The main purpose of the present invention is to provide a device and method for assisting aerial crane cargo lifting, so as to achieve long-distance control of accurate and stable cargo delivery.

[0007] The technical solution adopted by the present invention is:

[0008] A device for assisting cargo lifting by an overhead crane is used for placing cargo into a vertical shaft below an obstacle, and comprises a control box, a chain, a gear mechanism, a connecting plate, a first pulley, a second pulley and a lifting rope.

[0009] The connecting plate is arranged between the first pulley and the second pulley. The first pulley and the second pulley are internally connected with a sling rope in a sliding manner. The cargo is arranged below the first pulley. The control box is arranged above the obstacle. The control box is connected through a chain and a gear mechanism. The gear mechanism is arranged on the connecting plate.

[0010] A fixing plate is arranged at the bottom of the control box body, and the fixing plate is detachably connected to the obstacle by bolts.

[0011] A reduction motor, a worm wheel, a worm, bearings and gears are also installed inside the control box.

[0012] The worm wheel is fixedly connected to the outer side wall of the output shaft of the reduction motor, the worm is meshedly connected to the lower side of the worm wheel, the front and rear sides of the worm are rotatably connected to the bearings, and the two bearings are respectively fixed to the inner side wall of the box body, the front end of the outer side wall of the worm is fixedly connected to the gear near the front of the worm wheel, and the outer side wall of the gear is rotatably connected to the chain.

[0013] A fixing block is also arranged inside the control box body, and the fixing block is fixedly arranged below the reduction motor.

[0014] The gear mechanism includes a ratchet, a rear axle, a pawl and a sprocket. The connecting plate is fixedly connected to the front surface of the rear axle. The inner side wall of the chain is rotatably connected to the sprocket, the inner side wall of the sprocket is meshedly connected to the ratchet, the rear surface of the ratchet is fixedly connected to the pawl, and the inner side wall of the ratchet is rotatably connected to the rear axle.

[0015] The gear mechanism is also provided with a shaft skin, which is fixedly connected to the outer side wall of the rear shaft.

[0016] The device for assisting the cargo lifting of the overhead crane is also provided with a first circular shaft and a second circular shaft. The first circular shaft is fixedly connected to the left side of the front surface of the connecting plate; the outer side wall of the first circular shaft is rotatably connected to the first pulley. The second circular shaft is fixedly connected to the right side of the front surface of the connecting plate, and the outer side wall of the second circular shaft is rotatably connected to the second pulley.

[0017] The cargo is detachably connected to the lower part of the lifting rope. When the cargo moves to the middle of the first pulley and the second pulley, the connecting plate drives the first pulley and the second pulley to rotate under the transmission of the sprocket, so that the first pulley, the second pulley and the lifting rope are entangled, and the first pulley and the second pulley transfer the cargo to the correct position through the lifting rope to complete the lifting operation.

[0018] The gear and the sprocket are connected through the chain transmission.

[0019] The present invention also provides a method for auxiliary aerial crane cargo lifting using the above-mentioned device for auxiliary aerial crane cargo lifting, comprising the following steps:

[0020] Step 1: Fix the device for auxiliary aerial crane cargo lifting on the obstacle through a fixing plate, and then connect the external power supply.

[0021] Step 2: When the cargo moves to the middle of the first pulley and the second pulley, the reduction motor drives the drive chain and sprocket to rotate, thereby realizing the rotation of the connecting plate, thereby realizing the clockwise rotation of the first pulley and the second pulley.

[0022] Step 3: Adjust the direction and height of the hoisted cargo. When the first pulley and the second pulley rotate, the cargo is moved and transferred to the correct position, and the hoisting operation is completed.

[0023] The technical effects of the present invention are:

[0024] The present invention arranges structural elements such as a reduction motor, a worm gear, a worm, a chain, a connecting plate, a sprocket, a ratchet, a pawl, and a rear axle, so that the device can drive the gear to move through the reduction motor, and the gear drives the sprocket to rotate through the chain, thereby realizing the rotation of the connecting plate. Through the rotation of the connecting plate, the positions of the two pulleys are switched, and the lifting rope is wound around the two pulleys. The direction and height of the hoisted cargo are adjusted through the rotation of the pulley, thereby realizing accurate delivery of the cargo, effectively avoiding the friction between the rope and obstacles, and improving the safety and stability during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a front view of a device that assists in the lifting of cargo by overhead cranes;

[0026] Figure 2 This is a rear view of the device that assists in the lifting of cargo by overhead cranes;

[0027] Figure 3 Right view of the device that assists in lifting cargo by overhead crane.

[0028] Among them: 1 is a reduction motor; 2 is a worm wheel; 3 is a worm; 4 is a bearing; 5 is a gear; 6 is a chain; 7 is a control box; 8 is a fixed block; 9 is an obstacle; 10 is a first pulley; 11 is a first circular shaft; 12 is a connecting plate; 13 is a second circular shaft; 14 is a second pulley; 15 is a lifting rope; 16 is a fixed plate; 17 is cargo; 18 is a ratchet; 19 is a rear axle; 20 is a ratchet; 21 is a shaft skin; 22 is a sprocket. DETAILED DESCRIPTION

[0029] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1-3 As shown, the present invention provides a device for assisting aerial cargo lifting, which is used to place cargo 17 into a vertical shaft below an obstacle 9, including a control box 7, a chain 6, a gear mechanism, a connecting plate 12, a first pulley 10, a second pulley 14 and a lifting rope 15.

[0031] The connecting plate 12 is arranged between the first pulley 10 and the second pulley 14. A sling 15 is slidably connected inside the first pulley 10 and the second pulley 14. The cargo 17 is arranged below the first pulley 10. The control box 7 is arranged above the obstacle 9. The control box 7 is connected to the gear mechanism through the chain 6. The gear mechanism is arranged on the connecting plate 12.

[0032] A fixing plate 16 is provided at the bottom of the control box 7, and the fixing plate 16 is detachably connected to the obstacle 9 by bolts. A reduction motor 1, a worm gear 2, a worm 3, a bearing 4 and a gear 5 are also installed inside the control box 7.

[0033] The worm wheel 2 is fixedly connected to the outer side wall of the output shaft of the reduction motor 1, the worm 3 is meshedly connected to the lower side of the worm wheel 2, the bearings 4 are rotatably connected to the front and rear sides of the worm 3, and the two bearings 4 are respectively fixed to the inner side wall of the box body 7, and the front end of the outer side wall of the worm 3 is fixedly connected to the gear 5 near the front of the worm wheel 2. The outer side wall of the gear 5 is rotatably connected to the chain 6.

[0034] A fixing block 8 is also disposed inside the control box 7 , and the fixing block 8 is fixedly disposed below the reduction motor 1 .

[0035] The gear mechanism includes a ratchet 18, a rear axle 19, a pawl 20 and a sprocket 22. The connecting plate 12 is fixedly connected to the front surface of the rear axle 19. The inner side wall of the chain 6 is rotatably connected to the sprocket 22, the inner side wall of the sprocket 22 is meshedly connected to the ratchet 18, the rear surface of the ratchet 18 is fixedly connected to the pawl 20, and the inner side wall of the ratchet 18 is rotatably connected to the rear axle 19.

[0036] The gear mechanism is also provided with a shaft skin 21 , which is fixedly connected to the outer side wall of the rear axle 19 .

[0037] The device for assisting aerial crane cargo lifting is also provided with a first circular shaft 11 and a second circular shaft 13 .

[0038] The first circular shaft 11 is fixedly connected to the left side of the front surface of the connecting plate 12; the outer wall of the first circular shaft 11 is rotatably connected to the first pulley 10. The second circular shaft 13 is fixedly connected to the right side of the front surface of the connecting plate 12; the outer wall of the second circular shaft 13 is rotatably connected to the second pulley 14.

[0039] Cargo 17 is detachably connected to the lower portion of the sling 15 .

[0040] When the cargo 17 moves to the middle of the first pulley 10 and the second pulley 14, the connecting plate 12 drives the first pulley 10 and the second pulley 14 to rotate under the transmission of the sprocket 22, so that the first pulley 10, the second pulley 14 and the lifting rope 15 are entangled, and the first pulley 10 and the second pulley 14 transfer the cargo 17 to the correct position through the lifting rope 15 to complete the lifting operation.

[0041] The gear 5 and the sprocket 22 are connected through the chain 6 transmission. The sprocket 22 is a one-way wheel. When the device is running, the gear 5 drives the chain 6 to rotate, and the chain 6 drives the sprocket 22 to rotate clockwise. The rotation of the sprocket 22 drives the rotation of the rear axle 19, thereby realizing the rotation of the connecting plate 12.

[0042] The present invention also provides a method for auxiliary aerial crane cargo lifting using the above-mentioned device for auxiliary aerial crane cargo lifting, comprising the following steps:

[0043] Step 1: Fix the device for assisting the cargo lifting of the overhead crane on the obstacle 9 through the fixing plate 16, and then connect it to the external power supply.

[0044] Step 2: When the cargo 17 moves between the first pulley 10 and the second pulley 14, the reduction motor 1 drives the drive chain 6 and the sprocket 22 to rotate, thereby realizing the rotation of the connecting plate 12, thereby realizing the clockwise rotation of the first pulley 10 and the second pulley 14.

[0045] Step 3: Adjust the direction and height of the hoisted cargo 17. When the first pulley 10 and the second pulley 14 rotate, the cargo 17 is moved to the correct position, and the hoisting operation is completed.

[0046] The technical effects of the present invention are:

[0047] The present invention arranges structural elements such as a reduction motor, a worm gear, a worm, a chain, a connecting plate, a sprocket, a ratchet, a pawl, and a rear axle, so that the device can drive the gear to move through the reduction motor, and the gear drives the sprocket to rotate through the chain, thereby realizing the rotation of the connecting plate. Through the rotation of the connecting plate, the positions of the two pulleys are switched, and the lifting rope is wound around the two pulleys. The direction and height of the hoisted cargo are adjusted through the rotation of the pulley, thereby realizing accurate delivery of the cargo, effectively avoiding the friction between the rope and obstacles, and improving the safety and stability during operation.

Claims

1. A device for assisting the lifting of cargo by overhead crane, used for placing cargo (17) into a vertical shaft below an obstacle (9), characterized in that: The invention comprises a control box (7), a chain (6), a gear mechanism, a connecting plate (12), a first pulley (10), a second pulley (14) and a sling (15); wherein the connecting plate (12) is arranged between the first pulley (10) and the second pulley (14); the first pulley (10) and the second pulley (14) are internally slidably connected with the sling (15); the cargo (17) is arranged below the first pulley (10); the control box (7) is arranged above the obstacle (9); the control box (7) is connected to the gear mechanism through the chain (6); the gear mechanism is arranged on the connecting plate (12); a fixing plate (16) is arranged at the bottom of the control box (7), and the fixing plate (16) is detachably connected to the obstacle (9) through bolts; a reduction motor (1), a worm wheel (2), a worm (3), a bearing (4), a gear (5), a fixing plate (16) and a fixing plate (16) are also installed inside the control box (7); A block (8), wherein the outer wall of the output shaft of the reduction motor (1) is fixedly connected with a worm wheel (2); the lower part of the worm wheel (2) is meshedly connected with a worm (3); the front and rear sides of the worm (3) are rotatably connected with bearings (4), and the two bearings (4) are respectively fixed to the inner wall of the box body (7); the front end of the outer wall of the worm (3) is fixedly connected with a gear (5) near the front of the worm wheel (2); the outer wall of the gear (5) is rotatably connected with a chain (6); the fixed block (8) is fixedly arranged below the reduction motor (1); the gear mechanism comprises a ratchet (18), a rear shaft (19), a pawl (20) and a sprocket (22); the connecting plate (12) is fixedly connected to the front surface of the rear shaft (19); the inner wall of the sprocket (22) is meshedly connected with the ratchet (18), the rear surface of the ratchet (18) is fixedly connected with the pawl (20), and the inner wall of the ratchet (18) is rotatably connected with the rear shaft (19).

2. The device for assisting aerial cargo lifting as claimed in claim 1, characterized in that: The inner side wall of the chain (6) is rotatably connected to a sprocket (22), and the gear (5) and the sprocket (22) are transmission-connected via the chain (6).

3. The device for assisting aerial cargo lifting as claimed in claim 2, characterized in that: The gear mechanism is also provided with a shaft skin (21), and the shaft skin (21) is fixedly connected to the outer side wall of the rear shaft (19).

4. The device for assisting aerial cargo lifting as claimed in claim 3, characterized in that: The device for assisting the overhead crane cargo lifting is also provided with a first circular shaft (11) and a second circular shaft (13); the first circular shaft (11) is fixedly connected to the left side of the front surface of the connecting plate (12); the second circular shaft (13) is fixedly connected to the right side of the front surface of the connecting plate (12); the outer wall of the first circular shaft (11) is rotatably connected to the first pulley (10); the outer wall of the second circular shaft (13) is rotatably connected to the second pulley (14).

5. A method for assisting aerial cargo lifting using the device for assisting aerial cargo lifting as claimed in claim 4, comprising the following steps: Step 1: Fix the device for assisting the cargo lifting by the overhead crane on the obstacle (9) through the fixing plate (16), and then connect it to an external power source; Step 2: When the cargo (17) moves to the middle of the first pulley (10) and the second pulley (14), the reduction motor (1) drives the drive chain (6) and the sprocket (22) to rotate, thereby realizing the rotation of the connecting plate (12), thereby realizing the clockwise rotation of the first pulley (10) and the second pulley (14); Step 3: Adjust the direction and height of the hoisted cargo (17). When the first pulley (10) and the second pulley (14) rotate, the cargo (17) is moved to the correct position, and the hoisting operation is completed.

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