Anti-falling device for lifting hook of cable crane

Abstract

The utility model relates to an anti-falling device for a lifting hook of a cable type crane, which solves the safety problem caused by top rushing of the cable type crane and is characterized in that a bottom plate of a lower triangular bracket is fixedly connected with the upper end of a connecting plate through a first bolt, the lower end of the connecting plate is fixedly connected with an offset ring through a second bolt, a lower mechanism is a box body, and the large end of an expansion head is hinged with the midpoint of a balance rod; the left end and the right end of the balance rod are fixedly connected with the expansion sleeve, the outer wall of the expansion pipe is embedded in the inner wall of the expansion sleeve, and the inner wall of the expansion pipe is connected with the outer wall of the friction sleeve. The inner wall of the friction sleeve is slidably connected with a lifting steel wire rope of the cable crane.

Description

Technical Field

[0001] The utility model relates to a cable crane hook anti-falling device, which is suitable for the safety protection of the cable crane when it hits the top, and is particularly suitable for the safety protection of the cable crane when an electronic limit device fails. Background Art

[0002] At present, most cable cranes used outdoors are protected by electronic limiters. However, in actual use, especially in harsh outdoor working environments with long winters at high altitudes and extremely low temperatures, the electronic limiters may freeze and cause the crane hook to hit the top and the wire rope to break. If there are people working under the crane, major safety accidents will occur. How to solve the safety accidents caused by outdoor cable cranes hitting the top in extremely cold work sites has become an important issue.

[0003] In order to solve the above problems, it is necessary to study a simple device that can effectively reduce the probability of safety accidents caused by top collisions of outdoor cable cranes used in extremely cold workplaces, and can solve the above problems in a cost-effective way. Summary of the invention

[0004] The utility model aims to provide a cable crane hook anti-falling device which has low cost and can effectively solve the safety accidents caused by the top collision of outdoor cable cranes used in extremely cold working places.

[0005] The utility model is achieved in this way:

[0006] The cable crane hook anti-fall device comprises an upper and a lower mechanism, wherein the upper and lower triangular brackets of the upper mechanism are hinged, the upper triangular bracket is connected to the trolley, the two bottom corners of the lower triangular bracket are connected to the upper wire rope drum shaft, the bottom plate of the lower triangular bracket is fixedly connected to the upper end of the connecting plate 2 by the first bolt 11, the lower end of the connecting plate is fixedly connected to the offset ring 4 by the second bolt 3, the two ends of the offset ring are connected by an oblique line, the lower mechanism is a box body, the two lower wire rope drum shafts are connected to the upper corner wall of the box body, the expansion head 13 is a column with a T-shaped cross section, the large end of which is hinged to the midpoint of the balance bar 5, and the small end of which is hinged to one end of two symmetrical bayonet pins 6 through a pin shaft 10 within a rotation range of 90 degrees, the other ends of the two bayonet pins are fitted with the expansion head to form a cylinder that is dynamically matched with the center hole of the upper wall of the box body, the left and right ends of the balance bar are fixedly connected to the expansion sleeve 7, and the expansion The outer wall of the expansion tube 9 is embedded in the inner wall of the sleeve, and the inner wall of the expansion tube is connected to the outer wall of the friction sleeve 8. The expansion tube is filled with adhesive, and the inner wall of the friction sleeve is slidably connected to the steel wire rope of the cable crane. The balance bar 5 on the lower mechanism is displaced up and down under the top force of the offset ring 4 of the upper mechanism and is connected to the two ends of the offset ring. As the distance between the steel wire ropes at both ends of the balance bar is reduced, the expansion tube in the expansion sleeve is squeezed and ruptured, and the chemical agent in the expansion tube is instantly bonded to the steel wire rope of the crane after rupture, and the steel wire rope is stuck at both ends of the balance bar. Under the upward pulling force of the steel wire rope and the downward thrust of the offset ring, the large end of the expansion head enters the box body through the center hole of the upper wall of the box body, and the two bayonet pins are completely separated from the center hole of the upper wall of the box body. Under the action of gravity, the two bayonet pins leave the expansion head and rotate 90 degrees to unfold horizontally, supporting the upper wall of the box body when the steel wire rope is disconnected.

[0007] When the height limiter fails, the hook of the cable crane continues to move upward, and the lower mechanism moves upward at the same time driven by the crane hook and the wire rope. When the balance rod 5 of the lower mechanism contacts the offset ring 4 of the upper mechanism, the balance rod 5 on the lower mechanism is displaced up and down under the top force of the offset ring 4 of the upper mechanism and is connected to the two ends of the offset ring 4. The expansion tube 9 in the expansion sleeve 7 at both ends of the balance rod 5 is squeezed and ruptured. After the chemical agent in the expansion tube 9 ruptures, it instantly adheres to the crane lifting wire rope, and the crane wire rope is stuck. The winch motor linked to the crane wire rope has an instantaneous current due to the stuck wire rope, and the circuit protection mechanism controls the winch motor to stop. At the same time, the expansion head 13 of the lower mechanism enters the box under the action of the upward pulling force of the wire rope and the downward thrust of the upper mechanism, and the latch 6 is unfolded under the action of gravity. At this time, if the crane hook hits the upper and lower mechanisms with too much force, the wire rope breaks, and the balance bar 5 on the lower member has connected the crane wire rope into one, preventing the safety accident caused by the swing after the wire rope breaks. At the same time, the crane hook will fall downward after the wire rope breaks. At this time, the latch 6 on the lower member has been unfolded, supporting the crane hook, preventing the safety accident caused by the hook falling. The cable crane hook anti-fall device is simple to make, flexible and convenient to use, has high rigidity, and is very suitable for the quick installation and use of cable cranes. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a structural diagram of the utility model in normal state.

[0009] Figure 2 This is a structural diagram of the utility model when the upper and lower mechanisms are in contact.

[0010] Figure 3 This is a structural diagram of the protection status of the utility model.

[0011] Figure 4 This is a diagram of the fixed connection between the connecting plate and the offset ring.

[0012] Figure 5 This is the connection diagram between the balance rod and the expansion head.

[0013] Figure 6 This is a diagram of the connection between the inner wall of the expansion tube and the friction sleeve.

[0014] Figure 7 This is a structural diagram of the expansion head and the bayonet pin connection. DETAILED DESCRIPTION

[0015] The cable crane hook anti-fall device comprises an upper and a lower mechanism, wherein the upper and lower triangular brackets of the upper mechanism are hinged, the upper triangular bracket is connected to the trolley, the two bottom corners of the lower triangular bracket are connected to the upper wire rope drum shaft, the bottom plate of the lower triangular bracket is fixedly connected to the upper end of the connecting plate 2 by the first bolt 11, the lower end of the connecting plate is fixedly connected to the offset ring 4 by the second bolt 3, the two ends of the offset ring are connected by an oblique line, the lower mechanism is a box body, the two lower wire rope drum shafts are connected to the upper corner wall of the box body, the expansion head 13 is a column with a T-shaped cross section, the large end of which is hinged to the midpoint of the balance bar 5, and the small end of which is hinged to one end of two symmetrical bayonet pins 6 through a pin shaft 10 within a rotation range of 90 degrees, the other ends of the two bayonet pins are fitted with the expansion head to form a cylinder that is dynamically matched with the center hole of the upper wall of the box body, the left and right ends of the balance bar are fixedly connected to the expansion sleeve 7, and the expansion The outer wall of the expansion tube 9 is embedded in the inner wall of the sleeve, and the inner wall of the expansion tube is connected to the outer wall of the friction sleeve 8. The expansion tube is filled with adhesive, and the inner wall of the friction sleeve is slidably connected to the steel wire rope of the cable crane. The balance bar 5 on the lower mechanism is displaced up and down under the top force of the offset ring 4 of the upper mechanism and is connected to the two ends of the offset ring. As the distance between the steel wire ropes at both ends of the balance bar is reduced, the expansion tube in the expansion sleeve is squeezed and ruptured, and the chemical agent in the expansion tube is instantly bonded to the steel wire rope of the crane after rupture, and the steel wire rope is stuck at both ends of the balance bar. Under the upward pulling force of the steel wire rope and the downward thrust of the offset ring, the large end of the expansion head enters the box body through the center hole of the upper wall of the box body, and the two bayonet pins are completely separated from the center hole of the upper wall of the box body. Under the action of gravity, the two bayonet pins leave the expansion head and rotate 90 degrees to unfold horizontally, supporting the upper wall of the box body when the steel wire rope is disconnected.

[0016] (1) Upper mechanism: It is the core component, cut from steel plate, installed at the bottom of the cable crane trolley and fixed with bolts;

[0017] (2) Lower mechanism: Made of steel plate, fixed above the hook of the cable crane, and is the core component;

[0018] (3) The expansion tubes in the expansion sleeves on the left and right sides of the lower mechanism are purchased finished products and serve as auxiliary structural parts for expansion anchoring.

Claims

1. A cable crane hook anti-fall device, characterized in that: The invention comprises an upper mechanism and a lower mechanism, wherein the upper and lower triangular brackets of the upper mechanism are hinged, the upper triangular bracket is connected to the trolley, the two bottom corners of the lower triangular bracket are connected to the upper wire rope drum shaft, the bottom plate of the lower triangular bracket is fixedly connected to the upper end of the connecting plate (2) by a first bolt (11), the lower end of the connecting plate is fixedly connected to the offset ring (4) by a second bolt (3), the two ends of the offset ring are connected by an oblique line, the lower mechanism is a box body, the two lower wire rope drum shafts are connected to the upper corner wall of the box body, the expansion head (13) is a column with a T-shaped cross section, the large end of which is hinged to the midpoint of the balance rod (5), the small end of which is hinged to one end of two symmetrical bayonet pins (6) through a pin shaft (10) within a rotation range of 90 degrees, the other ends of the two bayonet pins are fitted with the expansion head to form a cylinder that is dynamically matched with the center hole of the upper wall of the box body, the left and right ends of the balance rod are fixedly connected to the expansion sleeve (7), and the expansion sleeve is provided with a plurality of expansion sleeves. The wall is inlaid with the outer wall of the expansion tube (9), the inner wall of the expansion tube is connected to the outer wall of the friction sleeve (8), the expansion tube is filled with adhesive, the inner wall of the friction sleeve is slidably connected to the wire rope of the cable crane, the balance rod (5) on the lower mechanism is displaced up and down under the top force of the upper mechanism offset ring (4) and connected to the two ends of the offset ring, because the distance between the wire ropes at the two ends of the balance rod is reduced, the expansion tube in the expansion sleeve is squeezed and ruptured, and the chemical agent in the expansion tube is instantly bonded to the wire rope of the crane after rupture, and the wire rope is stuck at the two ends of the balance rod. Under the action of the upward pulling force of the wire rope and the downward thrust of the offset ring, the large end of the expansion head enters the box body through the center hole of the upper wall of the box body, and the two bayonet pins are completely separated from the center hole of the upper wall of the box body. Under the action of gravity, the two bayonet pins rotate 90 degrees away from the expansion head and unfold horizontally, supporting the upper wall of the box body when the wire rope is disconnected.

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