Top rushing prevention device of bridge crane hook group

Abstract

The utility model provides an anti-collision device for a hook group of a bridge crane, which comprises a guide sleeve, a guide rod, a pressing plate and a travel switch, pressing plates are arranged at the top ends of the guide rods; when the lifting hook group ascends to a certain height, the guide rod can be inserted into the guide sleeve, and when the pressing plate at the top end of the guide rod presses the contact of the travel switch, the lifting hook group continues to ascend; and when the pressing plate leaves the contact of the travel switch, the lifting hook group stops ascending. The guide rod and the guide sleeve which are matched with each other are respectively arranged on the trolley frame and the lifting hook group, and the pressing plate linked with the contact of the travel switch is arranged at the top end of the guide rod, so that when the guide rod is inserted into the guide sleeve, the guide sleeve drives the guide rod to ascend, and the lifting of the lifting hook group is realized. And the lifting hook group can be stopped from ascending when the pressing plate connected with the guide rod is separated from the travel switch. The anti-top-rushing device of the bridge crane hook group is simple, stable and reliable in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting machinery, in particular to an anti-top impact device for a hook group of a bridge crane. Background Art

[0002] The anti-top-collision device of the crane hook is a safety device designed to prevent the crane hook from top-collision accidents during operation. Top-collision means that the crane hook exceeds the predetermined upper lifting limit during the rising process and collides with the bottom of the crane's hoisting trolley or other structures, which may cause serious equipment damage or safety accidents, such as wire rope breakage, hook falling, etc.

[0003] Existing anti-top-hitting devices usually include a series of mechanical and / or electronic safety measures, which are activated when the hook rises to a dangerous height, preventing top-hitting by physically blocking or changing the rising path of the hook, so as to ensure that the hook can automatically stop rising when it reaches the safety height limit, thereby avoiding top-hitting. These devices may include but are not limited to the following types:

[0004] Lifting height limiter: This is a common mechanical device that limits the lifting height of the hook by setting a physical obstacle. When the hook touches this obstacle, the lifting mechanism will be triggered to stop working.

[0005] Electronic limit system: This system uses sensors and control units to monitor the position of the hook. Once the hook approaches the preset maximum height, the electronic system automatically cuts off the lifting power to prevent the hook from rising further.

[0006] Safety hooks and buffers: Some anti-top impact devices may include special safety hook designs and components that provide a buffer between the hook and the crane structure to reduce the impact force during a top impact.

[0007] The design and implementation of these anti-roofing devices help improve the safety of crane operations and reduce the risk of accidents caused by operating errors or equipment failures. By adopting these safety measures, the safety of crane operators and equipment can be effectively protected, while also ensuring the safety of other personnel and property on the construction site. However, the above anti-roofing devices are generally complex in structure or unreliable. Utility Model Content

[0008] The utility model provides an anti-top impact device for a hook group of a bridge crane to solve at least one of the above problems.

[0009] According to one aspect of the utility model, there is provided an anti-top impact device for the hook group of a bridge crane, comprising a guide sleeve and a guide rod, a pressure plate and a travel switch; the guide sleeve is arranged on the top of the hanging plate of the hook group; the guide rod is inserted into an axial hole fixedly connected to the trolley frame of the bridge crane, the guide rod is slidably connected to the axial hole, and the shape and position of the guide rod are adapted to the guide sleeve; a pressure plate is provided on the top of the guide rod; it is arranged that when the hook group rises to a certain height, the guide rod can be inserted into the guide sleeve, and when the pressure plate at the top of the guide rod presses the contact of the travel switch, the hook group continues to rise; when the pressure plate leaves the contact of the travel switch, the hook group stops rising.

[0010] The utility model provides an anti-collision device for the hook group of a bridge crane. The trolley frame and the hook group are respectively provided with an adapted guide rod and a guide sleeve. The top of the guide rod is provided with a pressure plate linked with the contact of the travel switch. When the guide rod is inserted into the guide sleeve, the guide sleeve is led to the guide rod to rise, so that the pressure plate connected with the guide rod is separated from the travel switch, and the hook group can stop rising. The anti-collision device for the hook group of the bridge crane has a simple structure, is stable and reliable.

[0011] In some embodiments, the trolley frame of the utility model includes two parallel first main beams and a second main beam, and rough guide plates are provided on the opposite sides of the first main beam and the second main beam, and the opposite sides of the rough guide plates on both sides are inclined surfaces; the distance between the upper ends of the relative inclined surfaces is smaller than the distance between the lower ends; the distance between the upper ends of the relative inclined surfaces is smaller than the maximum dimension of the hanging plate of the hook group perpendicular to the direction of the first main beam and the second main beam; the distance between the lower ends of the relative inclined surfaces is larger than the maximum dimension of the hanging plate of the hook group perpendicular to the direction of the first main beam 251 and the second main beam.

[0012] In some embodiments, the rough guide plate of the utility model includes a rough guide web and a wing plate; one side of the rough guide web is welded to the lower part of the opposite side of the first main beam and the second main beam, and the other side of the rough guide web is an inclined surface and is provided with a wing plate.

[0013] In some embodiments, the trolley frame of the utility model is provided with a balancing wheel support, both ends of the balancing wheel support are respectively connected to the first main beam and the second main beam, and the shaft hole is provided on the balancing wheel support.

[0014] In some embodiments, the guide rod of the utility model is cylindrical, with a bullet-shaped lower end or a truncated cone-shaped lower end and a cone-shaped lower end, so that the guide rod can be smoothly inserted into the guide sleeve.

[0015] In some embodiments, the utility model also includes a camera, a control device and a switch; the camera is used to obtain image data of the hook group and output the image data to the control device; the control device outputs the control instructions determined by comparing the image data with preset standard image data to the switch; the switch cuts off or maintains the lifting power supply circuit of the hook group according to the control instructions.

[0016] In some embodiments, the utility model further includes a height sensor, a control device and a lifting motor; the height sensor is used to measure the lifting height of the hook group and output the lifting height data to the control device; it is configured that when the lifting height of the hook group reaches a preset value, the control device reduces the input frequency of the lifting motor, so that the lifting speed of the hook group is reduced and continues to rise at a low speed. In this way, it is possible to avoid the safety problem caused by the hook group lifting at a high speed and colliding with the main beam due to inertia. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the trolley structure of a bridge crane according to an embodiment of the present invention;

[0018] Figure 2 A schematic structural diagram of an anti-top impact device for a bridge crane according to an embodiment of the present invention;

[0019] Figure 3 for Figure 2 A schematic diagram of a partial structure of an anti-top impact device of a bridge crane shown in FIG.

[0020] Figure 4 for Figure 2 A schematic diagram of the partial structure of the anti-top impact device of the bridge crane is shown. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0023] Finally, it should be noted that, in this article, relational terms such as first and second, counterclockwise and clockwise, forward and reverse are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include" and "comprise" include not only those elements, but also other elements not explicitly listed, or also include elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device that includes the elements.

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] Figure 1 The structure of a trolley frame of a bridge crane according to an embodiment of the utility model is schematically shown.

[0026] refer to Figure 1 As shown, the trolley frame 221 includes a first main beam 251, a second main beam 252 and a supporting beam 253 arranged in parallel, and two sub-beams connecting the first main beam 251, the second main beam 252 and the supporting beam 253 at both ends respectively.

[0027] Two sets of hoisting devices are installed on the trolley 221, including a main hoisting device and a small hoisting device. The main hoisting device includes a main drum 231, and a motor and a reducer 244 for driving the main drum 231 to rotate. The small hoisting device includes a small drum 232, and a motor and a reducer for driving the small drum 232 to rotate. The main hoisting device drives the main hook group 261 to move up and down, and the small hoisting device drives the small hook group 262 to move up and down.

[0028] A main drum 231 is provided on the first main beam 251 of the trolley 221. Two fixed pulley blocks 241 include a left fixed pulley block and a right fixed pulley block. The pulley shaft directions of the left fixed pulley block, the right fixed pulley block and the balance wheel 243 are perpendicular to the first main beam 251 and the second main beam 252, and the two ends of the support of the left fixed pulley block, the right fixed pulley block and the balance wheel 243 are respectively supported above the first main beam 251 and the second main beam 252. A small winch device is provided on the support beam 253.

[0029] The main hook assembly 261 includes a left movable pulley assembly, a right movable pulley assembly, a main hook, and a main suspension plate 270 for connecting the main hook and the left and right movable pulley assemblies 242 .

[0030] When the motor and the reducer 244 drive the main drum 231 to rotate, the main drum 231 lifts the main hook group 261 upward by winding the wire rope. A height sensor 33 is provided on the trolley frame 221. The height sensor 33 is used to measure the lifting height of the main hook group 261 and output the lifting height data to the control device. When the main hook group 261 is lifted upward to the system preset height, that is, close to the appropriate position at the bottom of the trolley frame 221, the height sensor 33 outputs the lifting height data of the main hook group 261 to the control device, and the control device reduces the input frequency of the lifting motor, so that the lifting speed of the main hook group 261 is reduced and continues to rise at a low speed, so as to avoid the main hook group 261 from colliding with the main beam due to inertia and causing safety problems.

[0031] Different from the traditional single main beam design with variable cross-section of the main hook of the trolley frame (a large height cross-section is adopted to solve the problem of large stress caused by the large bending moment in the middle of the main beam), the main hook beam of the trolley frame adopts a double main beam design with equal cross-section and height equal to the side beam.

[0032] Figure 2-4 The structure of the anti-top impact device of the hook group of the bridge crane according to one embodiment of the utility model is schematically shown.

[0033] refer to Figure 2-3 As shown, a plurality of rough guide plates 323 are provided on the opposite side of the first main beam 251 and the second main beam 252, and the rough guide plates 323 include rough guide webs and wing plates. One side of the rough guide web is welded to the lower part of the opposite side of the first main beam 251 and the second main beam 252, and the other side of the rough guide web is an inclined surface, and a wing plate is welded. The distance Az between the upper ends of the left and right wing plates is smaller than the distance Ad between the lower ends thereof, and the distance Az between the upper ends of the left and right wing plates is smaller than the maximum dimension B of the main hanging plate 270 perpendicular to the first main beam 251 and the second main beam 252, and the distance Ad between the lower ends of the left and right wing plates is larger than the maximum dimension B of the main hanging plate 270 perpendicular to the first main beam 251 and the second main beam 252.

[0034] When the main hanging plate 270 of the main hook group enters the area between the first main beam 251 and the second main beam 252, due to the obstruction of the coarse guide plates 323 on the left and right sides, the main hanging plate 270 equipped with two sets of movable pulley groups 242 and the main hooks gradually moves to the middle of the first main beam 251 and the second main beam 252 during the rising process. This arrangement can prevent the main hook group 261 from colliding with the trolley frame 221.

[0035] refer to Figure 4 As shown, the anti-top impact device 32 of the bridge crane also includes a travel switch 321, a guide rod 322 and a guide sleeve 324. The guide sleeve 324 is fixedly arranged on the top of the main hanging plate 270, and the guide sleeve 324 is connected to the hanging plate 270 by bolts.

[0036] A balancing wheel support 2431 is provided on the trolley frame 221 of the bridge crane, and the two ends of the balancing wheel support 2431 are respectively connected to the first main beam 251 and the second main beam 252, and the shaft hole 2432 is provided on the balancing wheel support 2431. The guide rod 322 is inserted into the shaft hole 2432 of the balancing wheel support 2431 and is slidably connected to the shaft hole 2432. The travel switch 321 is also fixedly installed on the balancing wheel support 2431. When the main hook group 261 is further lifted, the guide sleeve 324 installed on the main hanging plate 270 gradually approaches the guide rod 322, and the guide rod 322 will slowly insert into the guide sleeve 324, so as to guide the main hanging plate 270 further toward the middle of the first main beam 251 and the second main beam 252 during the lifting process of the main hook group 261. The guide rod 322 is cylindrical, and the diameter of the lower end is smaller than the diameter of the upper end. The lower end can be in the shape of a bullet head, a truncated cone with a small head facing downward, or a cone with a pointed end facing downward.

[0037] A pressure plate 3211 is welded on the top of the guide rod 322, and the pressure plate 3211 presses the contact of the travel switch 321. When the main hook assembly 261 drives the guide sleeve 324 to rise upward, the guide rod 322 inserted on the shaft hole 2432 of the balance wheel support 2431 will be inserted into the guide sleeve 324, and the main hook assembly 261 will continue to rise, which will cause the guide rod 322 to be lifted and move upward, so that the pressure plate 322 leaves the contact of the travel switch 321, and the circuit of the hook lifting is cut off through the control device. At this time, the main hook assembly 261 will stop lifting, preventing the safety hazard caused by the further lifting of the main hook assembly 261.

[0038] An anti-collision device can also be provided on the small hook group 262, and the shaft hole can be provided on the support beam 253.

[0039] refer to Figure 2 As shown, a camera 31 is also installed below the balance wheel support 2431, and the state of the hook group can be monitored through a visualization system. The real-time state diagram of the main hook group captured by the camera 31 is compared with the pre-stored standard image of the main hook group (i.e., standard image data, a safe state image that conforms to normal operation) to determine whether the circuit for the main hook group to lift needs to be cut off. The system can sense whether the main hook group has entered the gap between the first main beam 251 and the second main beam 252 of the trolley. After comparing with the standard image, if the comparison passes, the main hook group 261 continues to rise; if the comparison fails, a signal to stop rising is output to the control device, and the main hook group stops rising to ensure operation safety.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. Anti-top impact device for hook assembly of bridge crane, characterized in that: It includes a guide sleeve and a guide rod, as well as a pressure plate and a travel switch; The guide sleeve is arranged on the top of the hanging plate of the hook assembly; The guide rod is inserted into an axial hole fixedly connected to the trolley frame of the bridge crane, the guide rod is slidably connected to the axial hole, and the shape and position of the guide rod are adapted to the guide sleeve; A pressing plate is provided at the top end of the guide rod; the pressing plate is located above the shaft hole; It is arranged that when the hook assembly rises to a certain height, the guide rod can be inserted into the guide sleeve, and when the pressure plate at the top of the guide rod presses the contact of the travel switch, the hook assembly continues to rise; when the pressure plate leaves the contact of the travel switch, the hook assembly stops rising.

2. The anti-roofing device according to claim 1, characterized in that: The trolley frame comprises two parallel first main beams and a second main beam, and the first main beam and the second main beam are both provided with a rough guide plate on one side opposite to the other, and the rough guide plates on both sides have an inclined surface on one side opposite to the other. The distance between the upper ends of the opposite slopes is smaller than that between the lower ends; The distance between the upper ends of the opposite inclined surfaces is smaller than the maximum dimension of the hanging plate of the hook assembly perpendicular to the first main beam and the second main beam; The distance between the lower ends of the opposite inclined surfaces is greater than the maximum dimension of the hanging plate of the hook group perpendicular to the direction of the first main beam and the second main beam.

3. The anti-roofing device according to claim 2, characterized in that: The rough guide plate comprises a rough guide web and a wing plate; One side of the rough guide web is welded to the lower part of the opposite side of the first main beam and the second main beam, and the other side of the rough guide web is an inclined surface and is provided with a wing plate.

4. The anti-roofing device according to claim 3, characterized in that: The trolley frame is provided with a balancing wheel support, the two ends of the balancing wheel support are respectively connected to the first main beam and the second main beam, and the shaft hole is arranged on the balancing wheel support.

5. The anti-roofing device according to any one of claims 1 to 4, characterized in that: The guide rod is cylindrical, and the lower end is in the shape of a bullet head or a truncated cone with a small head downward, and the tip is in the shape of a cone downward.

6. The anti-roofing device according to any one of claims 1 to 4, characterized in that: It also includes cameras, as well as controls and switches; The camera is used to obtain image data of the hook group and output the image data to the control device; The control device outputs a control instruction determined by comparing the image data with preset standard image data to the switch; The switch cuts off or maintains the lifting power supply circuit of the hook group according to the control instruction.

7. The anti-roofing device according to any one of claims 1 to 4, characterized in that: It also includes a height sensor, as well as a control device and a lifting motor; The height sensor is used to measure the lifting height of the hook assembly and output the lifting height data to the control device; It is arranged that when the lifting height of the hook group reaches a preset value, the control device reduces the input frequency of the lifting motor, so that the lifting speed of the hook group is reduced and continues to rise at a low speed.

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