Guiding device of double-girder trolley lifting hook group of bridge crane

Abstract

The utility model provides a guide device of a lifting hook group of a double-girder trolley of a bridge crane, a trolley frame of the bridge crane comprises a first girder and a second girder which are arranged in parallel, thick guide plates are arranged on the opposite sides of the first girder and the second girder, and the opposite sides of the thick guide plates on the two sides are inclined planes; 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 size of a lifting plate of the lifting hook group in the direction perpendicular to the first main beam and the second main beam; the distance between the lower ends of the opposite slopes is larger than the maximum size of the lifting plates of the lifting hook sets in the direction perpendicular to the first main beam and the second main beam. According to the guide device of the bridge crane lifting hook group, when the lifting plate enters the area between the first main beam and the second main beam, due to the blocking of the thick guide plates on the left side and the right side, the lifting plate provided with the lifting hook group gradually moves towards the middle of the first main beam and the second main beam in the lifting process, and the lifting hook group can be prevented from colliding with a trolley frame.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting machinery, in particular to a guide device for a double-main-beam trolley hook group of a bridge crane. Background Art

[0002] The main beam used to carry the main hook on the trolley of a traditional bridge crane adopts a variable-section single-beam design. In order to solve the problem of large stress caused by the large bending moment in the middle of the main beam, the variable-section main beam adopts a large height section. The hook group of this single-beam crane is lower than the bottom of the trolley frame and has a safe distance from the lowest surface of the trolley frame main beam. The lifting guide of the hook group generally adopts a lifting pulley, and the hook group usually does not collide with the main beam. Utility Model Content

[0003] The utility model provides a guiding device for a double-main-beam trolley hook group of a bridge crane, so as to solve at least one of the above problems.

[0004] According to one aspect of the utility model, a guiding device for a double-main-beam trolley hook group of a bridge crane is provided, comprising a trolley frame of the bridge crane including two parallel first main beams and a second main beam, coarse guide plates are provided on opposite sides of the first main beam and the second main beam, and opposite sides of the coarse guide plates on both sides are inclined surfaces; the distance between the upper ends of the opposite inclined surfaces is smaller than the distance between the lower ends; the distance between the upper ends of the opposite inclined surfaces is smaller than the maximum dimension of the hanger plate of the hook group perpendicular to the first main beam and the second main beam; the distance between the lower ends of the opposite inclined surfaces is larger than the maximum dimension of the hanger plate of the hook group perpendicular to the first main beam and the second main beam.

[0005] The guide device of the hook group of the bridge crane of the utility model, when the hanging plate enters the area between the first main beam and the second main beam, due to the obstruction of the thick guide plates inclined on the left and right sides and gradually narrowing upward, the hanging plate installed with the hook group gradually moves to the middle of the first main beam and the second main beam during the rising process, which can effectively prevent the collision of the hook group and the trolley frame. In the bridge crane of the utility model, the trolley frame adopts a double-main-beam structure different from the traditional single-main-beam structure. The lifting height of the hook group will reach between the two main beams. The hook group may collide with the main beam during the lifting process and cause a safety accident. Therefore, it is necessary to set a guide device for the hook group to make the hook group avoid the main beam during the lifting process.

[0006] 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.

[0007] In some embodiments, the utility model further comprises a guide sleeve and a guide rod; the guide sleeve is arranged on the top of the hanging plate of the hook group; the guide rod is connected to the trolley frame of the bridge crane, and the shape and position of the guide rod are adapted to the guide sleeve. Thus, the hanging plate of the hook group can be further guided to the middle of the first main beam and the second main beam during the lifting process.

[0008] 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 is more easily inserted into the guide sleeve.

[0009] In some embodiments, the utility model further comprises a pressure plate and a travel switch; a pressure plate is provided at the top of the guide rod; a vertical shaft hole is provided on the trolley frame of the bridge crane; the guide rod is inserted into the shaft hole and slidably connected with the shaft hole; the pressure plate is located above the shaft hole; it is arranged that when the hook group rises to a certain height, the guide rod can be inserted into the guide sleeve, 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. In this way, the potential safety hazard caused by the hook group hitting the top can be prevented.

[0010] 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.

[0011] In some embodiments, the utility model further 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 compares the image data with the preset standard image data and outputs the control instruction to the switch; the switch cuts off or maintains the lifting power supply circuit of the hook group according to the control instruction. Therefore, if an abnormal situation occurs in the process of lifting the hook group, it will be fed back to the control system in time, and possible safety accidents can be predicted in time.

[0012] 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 safety problems caused by inertia collision with the main beam when the lifting speed of the hook group is fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the trolley structure of a double-main-beam trolley for a bridge crane according to one embodiment of the present invention;

[0014] Figure 2This is a schematic structural diagram of a guide device for a double-girder trolley of a bridge crane according to an embodiment of the present invention;

[0015] Figure 3 for Figure 2 A schematic diagram of the partial structure of the guide device of the double-girder trolley of the bridge crane shown;

[0016] Figure 4 for Figure 2 The schematic diagram of the partial structure of the guide device of the double-girder trolley of the bridge crane is shown. DETAILED DESCRIPTION

[0017] 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.

[0018] 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.

[0019] 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.

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0021] Figure 1 The structure of a trolley frame of a double-main-beam trolley of a bridge crane according to an embodiment of the utility model is schematically shown.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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 .

[0026] 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, and 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 (safety height) 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.

[0027] 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.

[0028] Figure 2-4 The structure of the guide device of the hook group of the double-girder trolley of the bridge crane in one embodiment of the utility model is schematically shown.

[0029] refer to Figure 2-3As 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 a rough guide web 3231 and a wing plate 3232. One side of the rough guide web 3231 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 3231 is an inclined surface, and the wing plate 3232 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 3232 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 3232 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.

[0030] 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.

[0031] refer to Figure 4 As shown, the guide device 32 of the double main beam trolley 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.

[0032] 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, and the main hanging plate 270 of the main hook group 261 during the lifting process is further guided to the middle of the first main beam 251 and the second main beam 252. In this embodiment, the main body of the guide rod 322 is cylindrical, and the lower end is bullet-shaped. In other embodiments, the main body of the guide rod 322 may also be in other shapes such as a quadrangular prism, an elliptical cylinder, etc., and the lower end of the guide rod 322 may also be in the shape of a truncated cone with a small head facing downward, or in the shape of a cone with a pointed end facing downward.

[0033] 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 control system cuts off the circuit of the hook lifting. 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.

[0034] A guide device may also be provided on the small hook group 262 , and the shaft hole may be provided on the support beam 253 .

[0035] 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 system can pre-store a standard picture of the normal operation of the main hook group 261 (a safe state picture that meets normal operation). The camera 31 obtains the image of the main hook group 261 and outputs it to the control device. The control device compares the real-time state diagram of the main hook group 261 taken by the camera 31 with the pre-stored standard picture of the main hook group 261 to determine whether it is necessary to cut off the lifting circuit of the main hook group 261. The control device can sense whether the hook group enters the gap between the first main beam 251 and the second main beam 252 of the trolley. After comparing with the standard picture, if the comparison passes, the hook group continues to rise; if the comparison fails, a signal to stop rising is output to the control system, and the hook group stops rising to ensure operation safety.

[0036] 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. The guiding device of the double-girder trolley hook assembly of the bridge crane is characterized in that: The trolley frame of the bridge crane 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.

2. The guide device according to claim 1, 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.

3. The guide device according to claim 2, characterized in that: Also includes a guide sleeve and a guide rod; The guide sleeve is arranged on the top of the hanging plate of the hook assembly; The guide rod is connected to the trolley frame of the bridge crane, and the shape and position of the guide rod are adapted to the guide sleeve.

4. The guide device according to claim 3, 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.

5. The guide device according to claim 1, characterized in that: It also includes a pressure plate and a travel switch; A pressing plate is provided at the top end of the guide rod; The trolley frame of the bridge crane is provided with a vertical shaft hole; the guide rod is inserted into the shaft hole and is slidably connected with the shaft hole; the pressure 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.

6. The guide device according to claim 5, 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.

7. The guiding device according to any one of claims 1 to 6, 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.

8. The guiding device according to any one of claims 1 to 6, 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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