CN215516415U - Overweight control device of cable crane lifting rope - Google Patents

Abstract

The utility model discloses an overweight control device of a cable crane lifting rope, belonging to the technical field of lifting, comprising a main shell and a lifting rod penetrating through the middle part of the main shell, wherein two fixed shafts which are oppositely and horizontally arranged are arranged in the main shell; the upper end of the main shell body is fixed with an upper ear plate, the lower end of the lifting rod is fixed with a lower ear plate, the inner bottom of the main shell body is provided with a travel switch triggered by the sliding block, and the travel switch is positioned on one side of the sliding block back to the lifting rod. The single spring has small bearing capacity and is not easy to have fatigue, so that the service life of the spring can be greatly prolonged; the hoisting rope is suitable for hoisting ropes with different bearing capacity safety values, and has good universality.

Description

Overweight control device of cable crane lifting rope

Technical Field

The utility model relates to the technical field of hoisting, in particular to an overweight control device for a hoisting rope of a cable crane.

Background

When the cable crane is used for hoisting heavy objects, the bearing capacity of the hoisting rope is generally designed to be safe, and the appropriate hoisting rope is selected according to the weight of the hoisted objects. During specific construction, if the weight of the hoisting object is overweight or the hoisting object is blocked or collided, the stress of the hoisting rope is possibly over-limited, but the hoisting rope is difficult to find in time, so that great potential safety hazard exists.

At present, disclose an overweight controlling means of cable crane lifting rope in the patent of grant publication No. CN212076216U, it sets up the bearing bar that the lower extreme has the bearing plate to be equipped with bearing bar sliding connection's roof, the upper end welding of bearing bar has last otic placode, the below fixedly connected with curb plate and the lower otic placode of roof, the cover is equipped with the spring on the bearing bar between bearing plate and roof, install a sensor on the curb plate, the sensor is equipped with touching formula inductive head, the lower extreme of bearing bar is fixed with the limiting plate. When the lifting rope is used, the upper lug plate and the lower lug plate are respectively connected with a lifting rope, the lifting rope of the upper lug plate is connected with the cable crane, the lifting rope of the lower lug plate is connected with a lifted object, a signal output line of the sensor is connected with a control system of the cable crane, when the cable crane lifts, the spring is compressed, the bearing rod moves upwards, when the limiting plate is in contact with the sensor induction head, the bearing capacity of the lifting rope reaches a safety value, the sensor sends an induction signal to the control system, the control system can emergently stop the cable crane, the lifting rope is prevented from being broken due to overweight, the occurrence of cable crane accidents is effectively reduced, and the construction safety is greatly guaranteed. However, it has the following disadvantages: the gravity of the hung heavy object completely acts on one spring, so that the spring is large in bearing capacity and easy to fatigue, and the service life of the spring is greatly shortened.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

The utility model aims to solve the technical problem of providing an overweight control device of a hoisting rope of a cable crane, wherein a single spring in the device has small bearing capacity and is not easy to generate fatigue condition, so that the service life of the spring can be greatly prolonged; the hoisting rope is suitable for hoisting ropes with different bearing capacity safety values, and has good universality.

2. Technical scheme

In order to solve the problems, the utility model adopts the following technical scheme:

an overweight control device for a hoisting rope of a cable crane comprises a main shell, an upper lug plate and a lower lug plate, wherein the upper lug plate and the lower lug plate are respectively fixed at the upper end and the lower end of the main shell;

a gap is reserved between the two limiting plates, a lifting rod which is vertically arranged and penetrates through the main shell is arranged between the two limiting plates, through holes for the lifting rod to penetrate through are formed in the centers of the upper end surface and the lower end surface of the main shell, the upper end of the lifting rod is hinged with two hinged plates, the lower ends of the two hinged plates are respectively hinged with the two sliding blocks in a one-to-one correspondence mode, and two upper strip-shaped openings for the hinged plates on the corresponding sides to transversely move are formed in the upper end surface of the main shell;

the two ends of the upper end surface of the main shell are both fixed with upper ear plates, the lower end of the lifting rod is fixed with a fixed plate positioned below the main shell, and the lower ear plates are fixed on the bottom surface of the fixed plate; the inner bottom of the main shell is provided with a travel switch triggered by the sliding block, and the travel switch is positioned on one side of the sliding block back to the lifting rod.

Furthermore, the travel switch is connected with the bottom surface of the main shell in a sliding mode, and a locking assembly is arranged between the travel switch and the main shell. With travel switch lateral shifting to different positions to with locking Assembly locking, can trigger travel switch when the spring compression is to different degrees, with cable crane emergency shutdown, make this device can be applicable to the jack-up rope of different bearing capacity safety values, possess better commonality.

Furthermore, travel switch's top is fixed with the stopper, the locking subassembly is including fixing in the stopper bottom and running through main casing body bottom bolt and the lock nut of screw thread suitability suit on the part that the bolt extends to the main casing body outside, the bottom of main casing body is seted up and is supplied bolt lateral shifting's lower bar mouth, the width of stopper is greater than the width of bar mouth down. After the locking nut is unscrewed, the bolt can transversely move along the lower strip-shaped opening to drive the travel switch to move, so that the travel switch is slidably connected with the main shell; after the travel switch moves to the target position, the locking nut is screwed to be tightly pressed on the main shell, and the position of the bolt can be locked, namely the position locking effect of the locking assembly on the travel switch is realized; the width of stopper is greater than the width of bar mouth down, can prevent that the bolt from breaking away from bar mouth down.

Furthermore, the bolt is equipped with the suit piece that is located the lock nut top on being located the part of main casing body below cover, be equipped with the length scale mark that is located under the bottom surface of main casing body on one side of the bar mouth, be fixed with the pointer of directional length scale mark on the suit piece. After the locking nut is unscrewed, the sleeving block can move transversely along with the bolt and can move up and down along the bolt; in the translation process of the bolt, the sleeving block drives the indicating needle to move synchronously, and whether the indicating needle reaches a target position or not can be determined by observing corresponding scales on the scale mark of the pointing length of the indicating needle; after the travel switch moves to the target position, the locking nut is screwed up to push the sleeving block to be tightly pressed on the main shell, and the position of the bolt is locked.

Furthermore, two travel switches are arranged at the inner bottom of the main shell, and the two travel switches are respectively positioned below the corresponding side fixing shaft. The two travel switches can be connected in series, in application, only when the two travel switches are triggered, a signal is transmitted to the control system, the cable crane is stopped emergently, and therefore misoperation can be avoided; the two travel switches can also be connected in parallel, and in application, when one travel switch is damaged, the other travel switch can still be triggered to ensure the function of the device, so that the service life of the device is prolonged.

3. Advantageous effects

(1) The utility model is provided with the main shell, the lifting rod, the two groups of symmetrically arranged fixed shafts, the sliding blocks, the springs and the hinged plates, when in application, the gravity of a lifted object acts on the lifting rod firstly, then acts on the two sliding blocks through the two hinged plates and finally acts on the two springs, the supporting resistance action of related components can offset part of the gravity, and finally the gravity is offset through the elastic deformation of the two springs, the bearing of a single spring is small, the fatigue condition is not easy to occur, and the service life of the springs can be greatly prolonged.

(2) The utility model is provided with a travel switch which is connected with the bottom surface of the main shell in a sliding way, and a locking component is arranged between the travel switch and the main shell. During the application, can adjust travel switch's position according to the bearing capacity safety value of different jack-up ropes to locking with the locking Assembly, it triggers travel switch when spring compression to different degree, hangs cable and promptly shuts down, makes this device can be applicable to the jack-up rope of different bearing capacity safety values, possesses better commonality.

In conclusion, the single spring has small bearing capacity and is not easy to generate fatigue, so that the service life of the spring can be greatly prolonged; the hoisting rope is suitable for hoisting ropes with different bearing capacity safety values, and has good universality.

Drawings

FIG. 1 is a schematic external view of the present invention;

fig. 2 is an internal structural view of the main casing 2;

FIG. 3 is an enlarged view of the structure of the area A in FIG. 2;

fig. 4 is a bottom view of the present invention.

Reference numerals: 1. an upper ear plate; 2. a main housing; 3. a lifting rod; 4. a hinge plate; 5. hoisting holes; 6. locking the nut; 7. a lower ear plate; 8. a fixing plate; 9. a bolt; 10. sleeving a block; 11. a fixed shaft; 12. strip-shaped openings are arranged; 13. a slider; 14. a spring; 15. a lower strip-shaped opening; 16. a through hole; 17. a limiting plate; 18. a travel switch; 19. a limiting block; 20. an indicator needle; 21. length scale lines.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

As shown in fig. 1 and 2, the overweight control device for the cable crane hoisting rope comprises a main shell 2, and an upper ear plate 1 and a lower ear plate 7 which are respectively fixed at the upper end and the lower end of the main shell 2, wherein the upper ear plate 1 and the lower ear plate 7 are both provided with lifting holes 5, two fixing shafts 11 which are oppositely and horizontally arranged are arranged in an inner cavity of the main shell 2, the opposite ends of the two fixing shafts 11 are fixed on the inner wall of the main shell 2, limiting plates 17 are fixed at the opposite ends of the fixing shafts 11, a sliding block 13 is slidably sleeved on the fixing shafts 11, and a spring 14 which is sleeved on the fixing shafts 11 is arranged between one side of the sliding block 13, which is opposite to the limiting plates 17, and the fixed end of the fixing shafts 11; a gap is reserved between the two limiting plates 17, a lifting rod 3 which is vertically arranged and penetrates through the main shell 2 is arranged between the two limiting plates 17, through holes 16 for the lifting rod 3 to penetrate through are formed in the centers of the upper end surface and the lower end surface of the main shell 2, the upper end of the lifting rod 3 is hinged with two hinged plates 4, the lower ends of the two hinged plates 4 are respectively hinged with the two sliding blocks 13 in a one-to-one correspondence manner, and two upper strip-shaped openings 12 for the hinged plates 4 on the corresponding sides to transversely move are formed in the upper end surface of the main shell 2; the two ends of the upper end surface of the main shell 2 are both fixed with upper ear plates 1, the lower end of the lifting rod 3 is fixed with a fixed plate 8 positioned below the main shell 2, and the lower ear plates 7 are fixed on the bottom surface of the fixed plate 8;

as shown in fig. 2 and 3, a travel switch 18 triggered by the slider 13 is disposed at the inner bottom of the main housing 2, and the travel switch 18 is located at a side of the slider 13 facing away from the lifting rod 3; the travel switch 18 is slidably connected with the bottom surface of the main casing 2, and a locking component is arranged between the travel switch 18 and the main casing 2. The travel switch 18 is transversely moved to different positions and locked by the locking assembly, the travel switch 18 can be triggered when the spring 14 is compressed to different degrees, and the cable crane is emergently stopped, so that the device can be suitable for hoisting ropes with different bearing capacity safety values and has better universality; the top of travel switch 18 is fixed with stopper 19, the locking subassembly is including fixing in stopper 19 bottom and running through bolt 9 and the locknut 6 of screw thread suitability suit on the part that bolt 9 extended to the main casing body 2 outside of main casing body 2 bottom, the bottom of main casing body 2 is seted up and is supplied bolt 9 lateral shifting's lower bar mouth 15, the width of stopper 19 is greater than the width of bar mouth 15 down. After the locking nut 6 is unscrewed, the bolt 9 can transversely move along the lower strip-shaped opening 15 to drive the travel switch 18 to move, so that the travel switch 18 is slidably connected with the main shell 2; after the travel switch 18 moves to the target position, the locking nut 6 is screwed to be tightly pressed on the main shell 2, and the position of the bolt 9 can be locked, namely the position locking effect of the locking assembly on the travel switch 18 is realized; the width of the limiting block 19 is larger than that of the lower strip-shaped opening 15, so that the bolt 9 can be prevented from being separated from the lower strip-shaped opening 15.

Example 2

The present embodiment is different from embodiment 1 in that:

in this embodiment, as shown in fig. 3 and 4, a portion of the bolt 9 located below the main housing 2 is sleeved with a sleeving block 10 located above the lock nut 6, a length scale mark 21 located beside the lower strip-shaped opening 15 is arranged on the bottom surface of the main housing 2, and an indicator 20 pointing to the length scale mark 21 is fixed on the sleeving block 10. After the locking nut 6 is unscrewed, the sleeving block 10 can move transversely along with the bolt 9 and can move up and down along the bolt 9; in the translation process of the bolt 9, the sleeving block 10 drives the indicating needle 20 to move synchronously, and whether the target position is reached can be determined by observing the corresponding scale on the length scale mark 21 pointed by the indicating needle 20; after the travel switch 18 is moved to the target position, tightening the lock nut 6 can push the sleeving block 10 to be tightly pressed on the main shell 2, and the position of the bolt 9 is locked.

In the embodiment, as shown in fig. 2, two travel switches 18 are disposed at the inner bottom of the main housing 2, and the two travel switches 18 are respectively located below the corresponding side fixing shafts 11, and the two travel switches 18 are connected in series, and in application, only when both the two travel switches 18 are triggered, a signal is transmitted to the control system, so as to emergency stop the cable crane, thereby avoiding misoperation.

Otherwise, the same procedure as in example 1 was repeated.

Example 3

The present embodiment is different from embodiment 2 in that:

in the embodiment, two travel switches 18 are connected in parallel, and in application, when one of the travel switches 18 is damaged, the other travel switch 18 can still be triggered to ensure the function of the device, so that the service life of the device is prolonged.

The rest is the same as example 2.

The specific application process of the cable crane hoisting rope overweight control device is as follows:

during manufacturing, the compression amount of a single spring 14 and the gravity of a heavy object hoisted on the lower ear plate 7 are detected in advance, the relationship between the two is found, and the larger the gravity is, the larger the compression amount of the single spring 14 is; it is noted that the maximum allowable amount of compression of the spring 14 corresponds to a weight force greater than the load-bearing safety value of the hoisting rope.

When the safety device is used, the position of the travel switch 18 is firstly adjusted according to the bearing capacity safety value of the hoisting rope, and the safety device specifically comprises: considering the designed safety value of the hoisting rope as the gravity of a hoisted weight, so as to determine the compression amount corresponding to a single spring 14, knowing that when the travel switch 18 is positioned at one end of the lower strip-shaped opening 15 back to the lifting rod 3, the compression amount of the corresponding single spring 14 is the maximum compression amount, and the difference between the maximum compression amount and the compression amount is the distance of the travel switch 18 moving from one end of the lower strip-shaped opening 15 back to the lifting rod 3 to the other end, and accordingly, moving the travel switch 18 to a target position and locking;

then the two upper ear plates 1 are connected with the same hoisting rope connected with the cable crane, the lower ear plate 7 is connected with the other hoisting rope, the lower end of the hoisting rope is connected with the lifted object, and then the signal output line of the travel switch 18 is connected with the control system of the cable crane. In the initial state, as shown in fig. 2, the two sliding blocks 13 are located at the sides of the corresponding limiting plates 17, the lower ends of the two hinged plates 4 are located at the close ends of the two upper strip-shaped openings 12, and the lifting rod 3 is located at a higher position. When a cable crane is lifted, the lifting rod 3 descends, the upper ends of the two hinged plates 4 both move downwards, the two sliding blocks 13 are pushed to move back to back, the two springs 14 are compressed simultaneously, when the sliding blocks 13 touch the travel switch 18, the situation that the bearing capacity of the lifting rope reaches a safe value is shown, the travel switch 18 sends a signal to the control system, the control system can stop the cable crane in an emergency, and the lifting rope is prevented from being broken due to overweight.

In the hoisting process, the gravity of the hoisted object firstly acts on the lifting rod 3, then acts on the two sliding blocks 13 through the two hinged plates 4, and finally acts on the two springs 14, the supporting resisting action of related components can counteract partial gravity, and finally the gravity is counteracted through the elastic deformation of the two springs 14, the bearing of a single spring 14 is small, the fatigue condition is not easy to occur, and therefore the service life of the spring 14 can be greatly prolonged.

According to the utility model, the single spring has small bearing capacity and is not easy to generate fatigue, so that the service life of the spring can be greatly prolonged; the hoisting rope is suitable for hoisting ropes with different bearing capacity safety values, and has good universality.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims (5)

1. The overweight control device for the hoisting rope of the cable crane is characterized by comprising a main shell (2), and an upper lug plate (1) and a lower lug plate (7) which are respectively fixed at the upper end and the lower end of the main shell (2), wherein two fixing shafts (11) which are oppositely and horizontally arranged are arranged in the inner cavity of the main shell (2), the opposite ends of the two fixing shafts (11) are fixed on the inner wall of the main shell (2), limiting plates (17) are fixed at the opposite ends of the fixing shafts (11), a sliding block (13) is sleeved on the fixing shafts (11) in a sliding manner, and a spring (14) sleeved on the fixing shaft (11) is arranged between one side of the sliding block (13) back to the limiting plates (17) and the fixed end of the fixing shaft (11);

a gap is reserved between the two limiting plates (17), a lifting rod (3) which is vertically arranged and penetrates through the main shell (2) is arranged between the two limiting plates (17), through holes (16) for the lifting rod (3) to pass through are formed in the centers of the upper end surface and the lower end surface of the main shell (2), the upper end of the lifting rod (3) is hinged with the two hinged plates (4), the lower ends of the two hinged plates (4) are hinged with the two sliding blocks (13) in a one-to-one correspondence manner, and the upper end surface of the main shell (2) is provided with two upper strip-shaped openings (12) for the hinged plates (4) on the corresponding sides to transversely move;

the two ends of the upper end face of the main shell (2) are both fixed with upper ear plates (1), the lower end of the lifting rod (3) is fixed with a fixing plate (8) positioned below the main shell (2), and the lower ear plates (7) are fixed on the bottom surface of the fixing plate (8); the inner bottom of the main shell (2) is provided with a travel switch (18) triggered by the sliding block (13), and the travel switch (18) is positioned on one side of the sliding block (13) back to the lifting rod (3).

2. A cable-lift hoist rope overweight control device according to claim 1, characterized in that the travel switch (18) is slidingly connected with the bottom surface of the main housing (2) and a locking assembly is arranged between the travel switch (18) and the main housing (2).

3. The cable crane lifting rope overweight control device according to claim 2, characterized in that a limiting block (19) is fixed on the top of the travel switch (18), the locking component comprises a bolt (9) fixed on the bottom of the limiting block (19) and penetrating through the bottom of the main casing (2) and a lock nut (6) which is sleeved on the part of the bolt (9) extending to the outer side of the main casing (2) in a thread adaptive manner, a lower strip-shaped opening (15) for the bolt (9) to move transversely is formed in the bottom of the main casing (2), and the width of the limiting block (19) is greater than that of the lower strip-shaped opening (15).

4. The overweight control device of a cable crane hoisting rope according to claim 3, wherein the part of the bolt (9) below the main casing (2) is sleeved with a sleeving block (10) above the locknut (6), the bottom surface of the main casing (2) is provided with a length scale mark (21) beside the lower strip-shaped opening (15), and the sleeving block (10) is fixed with an indicator needle (20) pointing to the length scale mark (21).

5. A cable-lift rope overweight control according to any of claims 1-4, characterized in that the inner bottom of the main housing (2) is provided with two travel switches (18), and the two travel switches (18) are located below the respective side fixed shaft (11).

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