Tower crane counterweight fall-off triggering device with safety free travel

Abstract

This invention discloses a tower crane counterweight detachment triggering device with a safety idle travel. Belonging to the field of mechanical technology, the overall structure comprises a detachable counterweight, a safety rope, a wedge joint, a limit pin traction joint, a wire rope, a cross-shaped transition beam, a traction rod A, a tow bar frame, a counterweight support frame, a traction rod B, a limit pin, and a guide rail. In this invention, the counterweight detachment triggering device adopts a linkage structure. When the tower crane suddenly unloads and tilts backward, the upward displacement of the boom pulls the traction rod. The traction rod, through the cross-shaped transition beam, separates the counterweight support frame from the detachable counterweight, thus allowing the detachable counterweight to detach. The counterweight detachment triggering device has a safety idle travel and employs two safety mechanisms—a safety rope and a limit pin—to prevent the counterweight from accidentally detaching, thereby improving the operational safety performance of ultra-large tonnage tower cranes.

Description

Technical Field

[0001] This invention belongs to the field of engineering machinery and relates to a tower crane counterweight fall-off triggering device with a safety idle travel. Background Technology

[0002] Because ultra-large tonnage tower cranes have large lifting capacities, they will experience a huge backward tilting moment during sudden unloading. Timely detachment of the counterweight is an effective way to reduce or offset this backward tilting moment. Ensuring timely and effective detachment of the counterweight is paramount. This invention designs a tower crane counterweight detachment trigger device with a safety idle stroke, which effectively prevents the counterweight from accidentally detaching and improves the operational safety performance of ultra-large tonnage tower cranes.

[0003] Existing counterweight detachment solutions for tower cranes are extremely rare and do not consider the issue of accidental triggering; for example, CN218058227U, the patented counterweight detachment method does not include a safety idle stroke. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to ensure that the counterweight of a tower crane can be released in a timely, safe and reliable manner. It provides a tower crane counterweight release triggering device with a safety idle stroke, which solves the problem of needing to release the counterweight when a super-large tonnage tower crane is suddenly unloaded, improves the operational safety performance of super-large tonnage tower cranes, and is applicable to super-large tonnage tower cranes.

[0005] Technical solution: The tower crane counterweight fall-off triggering device with safety idle travel described in this invention includes a tower body and a boom installed at the upper end of the tower body;

[0006] A counterweight fall-off triggering device is also installed at one end of the boom;

[0007] The counterweight detachment triggering device includes a detachable counterweight, a safety rope, a wedge joint, a limit pin traction joint, a wire rope, a cross-shaped transition beam, a traction rod A, a counterweight bracket, a traction rod B, a limit pin, and a guide rail.

[0008] A traction rod A is installed at one end of the detachable counterweight.

[0009] A safety rope is connected to one end of the traction rod A, and the other end of the safety rope is connected to the upper end of the cross-shaped transition beam.

[0010] A limit pin traction connector is installed at one end of the traction rod A, and an elongated hole is provided on the limit pin traction connector;

[0011] The traction rod A is hinged to the limit pin traction joint, and the hinge point moves within the elongated hole opened on the limit pin traction joint.

[0012] A wedge-shaped joint is connected to the other end of the limit pin traction joint, and a wire rope is connected to the other end of the wedge-shaped joint.

[0013] The wire rope is connected to the limit pin traction joint via a wedge joint;

[0014] The other end of the wire rope is connected to the cross-shaped transition beam;

[0015] The cross-shaped transition beam includes an upper ear plate, a cross-shaped box body, rollers, and a lower ear plate;

[0016] An elongated hole is provided on the upper ear plate. The limiting pin traction joint, traction rod A and the upper ear plate are hinged together at the same hinge point, and the hinge point moves within the elongated hole on the upper ear plate.

[0017] The rollers are mounted on the cross-shaped housing;

[0018] A guide rail adapted to the rollers on the cross-shaped box is installed on the lower side of the traction rod A, and the rollers move within the guide rail;

[0019] Corresponding pin holes are provided on the upper surfaces of the cross-shaped housing and the guide rail, and a limiting pin is inserted into the pin hole;

[0020] The counterweight bracket is movably mounted on the lower end of the detachable counterweight and is located on the boom.

[0021] A traction rod B is installed at one end of the counterweight bracket, and the counterweight bracket is hinged to the cross transition beam through the installed traction rod B.

[0022] A roller is movably installed between the detachable counterweight and the counterweight bracket;

[0023] A detachable counterweight is also installed at the tail end of the boom, near the counterweight detachment trigger device.

[0024] Furthermore, a tow bar frame is installed at the other end of the traction rod A, through which the traction rod A passes; the bottom end of the tow bar frame is installed on a guide rail.

[0025] Furthermore, the specific working steps of the tower crane counterweight fall-off triggering device with safety idle travel are as follows:

[0026] Step 1, i.e. Working State I: This is the normal working state of the tower crane. At this time, the detachable counterweight is not separated from the counterweight bracket, the detachable counterweight does not fall off, the safety rope is taut, the cross transition beam is located at the left end of the guide rail, and the limit pin traction joint, traction rod A and the hinge point of the upper ear plate are located at the left end of the long strip hole in the upper ear plate.

[0027] Step 2, i.e. Working State II: The tower crane suddenly unloads the boom and raises it to the corresponding angle. At this time, the traction rod A begins to move to the right, the safety rope is broken, and the limit pin traction joint, the hinge point between the traction rod A and the upper ear plate moves from the left end of the long hole of the upper ear plate to the right end of the long hole of the limit pin traction joint. At this time, the limit pin traction joint, the cross transition beam, and the limit pin do not move, the detachable counterweight does not separate from the counterweight bracket, and the detachable counterweight does not fall off.

[0028] Step 3, i.e., working state III: The boom continues to rise from working state II. At this time, the limit pin traction joint, the traction rod A and the hinge point of the upper ear plate move from the right end of the long hole of the limit pin traction joint to the right end of the long hole of the upper ear plate. The limit pin traction joint pulls the wire rope through the wedge joint to pull out the limit pin. The cross transition beam is unlocked. The detachable counterweight does not separate from the counterweight bracket, and the detachable counterweight does not fall off.

[0029] Step 4, i.e. Working State IV: The boom continues to rise from Working State III. At this time, the traction rod A pulls the cross transfer beam to move to the right along the guide rail, and the detachable counterweight separates from the counterweight bracket, and the detachable counterweight falls off.

[0030] Beneficial effects: Compared with the prior art, the features of this invention are: 1. This invention uses a linkage structure to transmit displacement, which can accurately control the stroke state of each component. The counterweight falling off triggering device is a mechanical structure throughout the entire process, which is safe and reliable and can ensure that the counterweight is released in a timely and effective manner; 2. The counterweight falling off triggering device has a safe idle stroke and adopts two safety measures: a safety rope and a limit pin, which can prevent the counterweight from accidentally falling off and improve the safety performance of ultra-large tonnage tower cranes. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 This is Figure I, showing the working state of the counterweight falling off trigger device in this invention;

[0033] Figure 3 This is Figure II, showing the working state of the counterweight falling off trigger device in this invention;

[0034] Figure 4 This is Figure III, showing the working state of the counterweight falling off trigger device in this invention;

[0035] Figure 5 This is diagram IV showing the working state of the counterweight falling off trigger device in this invention;

[0036] In the diagram, 1 is a detachable counterweight, 2 is a safety rope, 3 is a wedge joint, 4 is a limit pin traction joint, 5 is a wire rope, 6 is a cross-shaped transition beam, 61 is an upper ear plate, 62 is a cross-shaped housing, 63 is a roller, 64 is a lower ear plate, 7 is traction rod A, 8 is a tow bar frame, 9 is a counterweight bracket, 10 is traction rod B, 11 is a limit pin, and 12 is a guide rail. Detailed Implementation

[0037] To more clearly illustrate the technical solution of the present invention, the technical solution of the present invention will be further described in detail below with reference to the accompanying drawings;

[0038] As shown in the figure, the tower crane counterweight detachment triggering device with safety idle travel of the present invention adopts a linkage structure. When the tower crane suddenly unloads and tilts backward, the upward displacement of the boom is used to pull the traction rod. The traction rod separates the counterweight bracket from the detachable counterweight through the cross transition beam 6, so as to realize the detachable counterweight detachment.

[0039] The schematic diagram of the operation process of the counterweight detachment triggering device is shown below. The overall structure consists of a detachable counterweight 1, a safety rope 2, a wedge joint 3, a limit pin traction joint 4, a wire rope 5, a cross transition beam 6, an upper ear plate 61, a cross box 62, a roller 63, a lower ear plate 64, a traction rod A7, a tow bar frame 8, a counterweight bracket 9, a traction rod B10, a limit pin 11, and a guide rail 12.

[0040] The safety rope 2 serves to prevent accidental triggering and restricts the movement of the traction rod A7. Different specifications can be selected according to requirements.

[0041] The wire rope 5 is connected to the limiting pin traction joint 4 through the wedge joint 3. The pin traction joint 4 has an elongated hole. The traction rod A7 is hinged to the limiting pin traction joint 4 and the hinge point can move within the elongated hole of the pin traction joint 4.

[0042] The cross-shaped transition beam 6 is composed of an upper ear plate 61, a cross-shaped box 62, a roller 63 and a lower ear plate 64; the upper ear plate 61 has an elongated hole, the limiting pin traction joint 4, the traction rod A7 and the upper ear plate 61 are hinged together at the same hinge point and the hinge point can move within the elongated hole on the upper ear plate 61.

[0043] The roller 63 can move within the guide rail 12. The cross housing 62 and the upper surface of the guide rail 12 have corresponding pin holes, and the relative displacement between the cross transition beam 6 and the guide rail 12 can be limited by the limiting pin 11.

[0044] The counterweight bracket 9 is hinged to the cross transition beam 6 via the traction rod B10. There are rollers between the detachable counterweight 1 and the counterweight bracket 9, which can be separated from each other. The counterweight bracket 9 restricts the vertical displacement of the detachable counterweight 1 and is located on the boom.

[0045] Working state I is the normal working state of the tower crane. At this time, the detachable counterweight 1 is not separated from the counterweight bracket 9, the detachable counterweight 1 does not fall off, the safety rope 2 is tensioned, the cross transition beam 6 is located at the left end of the guide rail 12, and the hinge point of the limit pin traction joint 4, the traction rod A7 and the upper ear plate 61 is located at the left end of the long hole of the upper ear plate 61.

[0046] In working state II, the tower crane suddenly unloads the boom and raises it to the corresponding angle. At this time, the traction rod A7 begins to move to the right, the safety rope 2 is broken, and the hinge point of the limit pin traction joint 4, the traction rod A7 and the upper ear plate 61 moves from the left end of the long hole of the upper ear plate 61 to the right end of the long hole of the limit pin traction joint 4. At this time, the limit pin traction joint 4, the cross transition beam 6 and the limit pin 11 do not move, the detachable counterweight 1 and the counterweight bracket 9 do not separate, and the detachable counterweight 1 does not fall off.

[0047] Working state III is the same as working state II. The boom continues to rise. At this time, the hinge point of the limit pin traction joint 4, the traction rod A7 and the upper ear plate 61 moves from the right end of the long hole of the limit pin traction joint 4 to the right end of the long hole of the upper ear plate 61. The limit pin traction joint 4 pulls the wire rope 5 through the wedge joint 3 to prevent the limit pin 11 from falling out. The cross transition beam 6 is unlocked. The detachable counterweight 1 and the counterweight bracket 9 do not separate. The detachable counterweight 1 does not fall out.

[0048] Working state IV is the same as working state III. The boom continues to rise. At this time, the traction rod A7 pulls the cross transfer beam 6 to move to the right along the guide rail 12. The detachable counterweight 1 separates from the counterweight bracket 9 and the detachable counterweight 1 falls off.

[0049] To ensure the timely, safe, and reliable detachment of the tower crane's counterweight, this invention designs a tower crane counterweight detachment triggering device with a safety idle stroke. This solves the problem of detaching the counterweight when a super-large tonnage tower crane suddenly unloads, improves the operational safety performance of super-large tonnage tower cranes, and is applicable to super-large tonnage tower cranes.

[0050] The counterweight detachment triggering device adopts a linkage structure. When the tower crane suddenly unloads and tilts backward, the upward displacement of the boom pulls the traction rod. The traction rod separates the counterweight bracket from the detachable counterweight 1 through the cross transition beam 6, realizing the detachable counterweight detachment.

[0051] Key protection points of this invention: 1. The upper ear plate 61 of the cross-shaped transition beam 6 has an elongated hole, which allows for the arrangement of a safe free travel. The lower ear plate 64 is hinged to the traction rod to transmit displacement, which facilitates the roller 63 and the guide rail 12 to withstand the transition bending moment. (Structural form)

[0052] 2. The counterweight fall-off triggering device has a safety free travel and adopts two safety measures: safety rope 2 and limit pin 11. The series of actions of rope breaking, pin pulling and overall movement are achieved by the relative displacement difference between the limit pin traction joint 4, traction rod A7 and the hinge point of the upper ear plate 61 of the cross transition beam 6 within the long hole of the upper ear plate 61 of the limit pin traction joint 4 and the cross transition beam 6.

[0053] Key features of this invention: The counterweight detachment triggering device adopts a linkage structure. When the tower crane suddenly unloads and tilts backward, the upward displacement of the boom pulls the traction rod. The traction rod separates the counterweight bracket from the detachable counterweight through the cross-shaped transfer beam, realizing the detachable counterweight detachment. The counterweight detachment triggering device has a safety idle stroke and uses two safety measures: a safety rope and a limit pin, which can prevent the counterweight from accidentally detaching and improve the operational safety performance of ultra-large tonnage tower cranes.

[0054] The innovations and improvements of this invention are as follows: 1. This invention uses a linkage structure to transmit displacement, which can accurately control the stroke state of each component. The counterweight detachment triggering device is a mechanical structure throughout the entire process, which is safe and reliable and can ensure that the counterweight is released in a timely and effective manner; 2. The counterweight detachment triggering device has a safety idle stroke and adopts two safety measures: a safety rope and a limit pin, which can prevent the counterweight from being accidentally released and improve the operational safety performance of ultra-large tonnage tower cranes.

[0055] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A tower crane counterweight fall-off triggering device with a safety idle travel, characterized in that, This includes the tower body and the boom mounted on the upper part of the tower body; A counterweight fall-off triggering device is also installed at one end of the boom; The counterweight detachment triggering device includes a detachable counterweight (1), a safety rope (2), a wedge joint (3), a limit pin traction joint (4), a wire rope (5), a cross-shaped transfer beam (6), a traction rod A (7), a counterweight bracket (9), a traction rod B (10), a limit pin (11), and a guide rail (12). A traction rod A (7) is installed at one end of the detachable counterweight (1). A safety rope (2) is connected to one end of the traction rod A (7), and the other end of the safety rope (2) is connected to the upper end of the cross-shaped transition beam (6); A limit pin traction joint (4) is installed at one end of the traction rod A (7), and an elongated hole is provided on the limit pin traction joint (4); The traction rod A (7) is hinged to the limiting pin traction joint (4), and the hinge point moves within the elongated hole opened on the limiting pin traction joint (4). A wedge-shaped connector (3) is connected to the other end of the limit pin traction connector (4), and a wire rope (5) is connected to the other end of the wedge-shaped connector (3). The wire rope (5) is connected to the limit pin traction joint (4) through the wedge joint (3); The other end of the wire rope (5) is connected to the cross-shaped transition beam (6); The cross-shaped transition beam (6) includes an upper ear plate (61), a cross-shaped box body (62), a roller (63), and a lower ear plate (64). An elongated hole is provided on the upper ear plate (61). The limiting pin traction joint (4), traction rod A (7) and the upper ear plate (61) are hinged together at the same hinge point, and the hinge point moves within the elongated hole on the upper ear plate (61). The roller (63) is mounted on the cross-shaped housing (62); A guide rail (12) adapted to the roller (63) on the cross box (62) is installed on the lower side of the traction rod A (7), and the roller (63) moves within the guide rail (12); Corresponding pin holes are provided on the upper surfaces of the cross-shaped housing (62) and the guide rail (12), and a limiting pin (11) is inserted in the pin hole. The counterweight bracket (9) is movably mounted on the lower end of the detachable counterweight (1) and located on the boom. A traction rod B (10) is installed at one end of the counterweight bracket (9), and the counterweight bracket (9) is hinged to the cross transition beam (6) through the installed traction rod B (10). Rollers are movably arranged between the detachable counterweight (1) and the counterweight bracket (9); A detachable counterweight is also installed at the tail end of the boom, near the counterweight detachment trigger device.

2. The tower crane counterweight fall-off triggering device with safety idle travel according to claim 1, characterized in that, A tow bar frame (8) is installed at the other end of the traction rod A (7), and the traction rod A (7) passes through the tow bar frame (8); the bottom end of the tow bar frame (8) is installed on the guide rail (12).

3. The operating method of the tower crane counterweight fall-off triggering device with safety idle travel as described in any one of claims 1-2, characterized in that, The specific work steps are as follows: Step 1, i.e. Working state I: The tower crane is in normal working state. At this time, the detachable counterweight (1) and the counterweight bracket (9) are not separated, the detachable counterweight (1) is not detached, the safety rope (2) is taut, the cross transition beam (6) is located at the left end of the guide rail (12), and the limit pin traction joint (4), the traction rod A (7) and the hinge point of the upper ear plate (61) are located at the left end of the long strip hole in the upper ear plate (61); Step 2, i.e. Working state II: The tower crane suddenly unloads the boom and raises it to the corresponding angle. At this time, the traction rod A (7) begins to move to the right, the safety rope (2) is broken, and the hinge point of the limit pin traction joint (4), the traction rod A (7) and the upper ear plate (61) moves from the left end of the long hole of the upper ear plate (61) to the right end of the long hole of the limit pin traction joint (4). At this time, the limit pin traction joint (4), the cross transition beam (6), and the limit pin (11) do not move, the detachable counterweight (1) and the counterweight bracket (9) do not separate, and the detachable counterweight (1) does not fall off. Step 3, i.e. Working State III: The boom continues to rise in Working State II. At this time, the hinge point of the limit pin traction joint (4), the traction rod A (7) and the upper ear plate (61) moves from the right end of the long hole of the limit pin traction joint (4) to the right end of the long hole of the upper ear plate (61). The limit pin traction joint (4) pulls the wire rope (5) through the wedge joint (3) to pull out the limit pin (11). The cross transition beam (6) is unlocked. The detachable counterweight (1) and the counterweight bracket (9) do not separate. The detachable counterweight (1) does not fall off. Step 4, i.e. Working state IV: The boom continues to rise in working state III. At this time, the traction rod A (7) pulls the cross transfer beam (6) to move to the right along the guide rail (12), and the detachable counterweight (1) separates from the counterweight bracket (9), and the detachable counterweight (1) falls off.

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