Limiting device for controlling hoisting and lowering position of steel box girder

Abstract

The utility model provides a limiting device for controlling the hoisting lowering position of a steel box girder, which comprises a horizontal connecting plate and a lower vertical connecting plate, the upper end of the lower vertical connecting plate is connected with the horizontal connecting plate, and a connecting bolt connected with a fixing nut is arranged on the horizontal connecting plate in a penetrating manner. The head of the connecting bolt is located below the horizontal connecting plate and used for being poured on the upper end face of the bridge abutment, a supporting step for supporting the steel box girder is arranged on the side face of one side of the bridge abutment, and the distance between the lower vertical connecting plate and the horizontal connecting plate is smaller than the distance between the supporting step and the upper end face of the bridge abutment. The side, away from the horizontal connecting plate, of the vertical connecting plate is detachably connected with a fixed-thickness plate, the upper end face of the fixed-thickness plate is an inclined face, and the upper end face of the fixed-thickness plate inclines in the direction away from the horizontal connecting plate. The steel box girder descending device has the advantages that the steel box girder can be reliably controlled to descend between two bridge abutments, and the problems that danger and labor are wasted and accuracy is poor when the position below the steel box girder is manually controlled are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge hoisting process construction equipment, in particular to a limiting device for controlling the hoisting and lowering position of a steel box girder. Background Art

[0002] During the lifting and lowering process of the steel box girder, in order to avoid collision between the steel box girder and the abutment, which would cause damage to the abutment structure, it is necessary to ensure that the gap between the steel box girder and the abutment meets the requirements for the lowering position of the steel box girder; therefore, it is necessary to limit the lowering position of the steel box girder and keep the gap distance between the abutments on both sides and the steel box girder roughly equal. There is no corresponding device to limit the position, but the lowering position of the steel box girder is controlled manually. This control method is dangerous, laborious and has poor accuracy. Utility Model Content

[0003] The utility model aims to provide a limiting device for controlling the lifting and lowering position of a steel box girder, which can reliably control the steel box girder to be accurately lowered to between two abutments, thereby solving the problems of danger, labor and poor accuracy in manually controlling the lower position of the steel box girder.

[0004] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technology: a limiting device for controlling the lifting and lowering position of a steel box girder, characterized in that it comprises a horizontal connecting plate and a lower vertical connecting plate connected to the horizontal connecting plate at an upper end. The horizontal connecting plate is provided with a through hole of a horizontal connecting plate portion, and a connecting bolt is passed through the horizontal connecting plate portion, and the head of the connecting bolt is located below the horizontal connecting plate. The head of the connecting bolt is used to cast on the upper end surface of the abutment. A supporting step for supporting the steel box girder is provided on one side surface of the abutment. The distance that the lower vertical connecting plate extends out of the horizontal connecting plate is less than the distance between the supporting step and the upper end surface of the abutment. The connecting bolt is threadedly connected with a fixing nut located above the horizontal connecting plate, and the vertical connecting plate is detachably connected to a calibrating plate on a side away from the horizontal connecting plate. The upper end surface of the calibrating plate is an inclined surface, and the upper end surface of the calibrating plate is inclined in a direction away from the horizontal connecting plate. When in use, the utility model is fixed by pre-embedded connecting bolts on the two abutments of the box beam, the lower vertical connecting plate is located above the supporting step, and a calibrating plate with a thickness that meets the positioning requirements is selected and fixed on the lower vertical connecting plate, and then the steel box beam is dropped from between the utility models on the two abutments. When the steel box beam is further lowered, the calibrating plates of the utility model on both ends of the two abutments are lowered until they are supported on the normal steps, and then the fixing nuts are unscrewed to remove the components of the utility model except the connecting bolts for the next practical use. The calibrating plates are set to create a gap between the steel box beam and the abutment, and the positioning is accurate, which has a protective effect on the abutment, and can prevent the steel box beam from colliding with the abutment surface and damaging the abutment when it shakes.

[0005] Preferably, the other end of the horizontal connection plate is connected to the lower end of the upper vertical connection plate, which can more effectively prevent the abutment from being hit, and can allow the steel box girder to be roughly positioned through the upper vertical connection plate when it descends.

[0006] Preferably, one end of the horizontal connecting plate connected to the lower vertical connecting plate is connected to the lower end of the inclined guide plate, and the upper end of the inclined guide plate is inclined away from the thickness plate, so as to improve the smoothness of the steel box beam entering between the two lower vertical connecting plates of the utility model.

[0007] Preferably, the thickness determination plate is provided with a thickness determination plate portion through hole, the end of the thickness determination plate portion through hole away from the horizontal connecting plate is provided with a large diameter section, the lower vertical connecting plate is provided with a connecting pin inserted into the thickness determination plate portion through hole, the connecting pin is threadedly connected with a locking nut to prevent the thickness determination plate from falling off the connecting pin, the locking nut is entirely accommodated in the large diameter section, and the end of the connecting pin away from the lower vertical connecting plate is confined within the thickness determination plate portion through hole, so that the thickness determination can be more accurate.

[0008] Preferably, the lower end of the lower vertical connecting plate is provided with an avoidance groove, the avoidance groove is located between the lower end surface of the lower vertical connecting plate and the surface away from the side of the horizontal connecting plate, the dimension of the avoidance groove along the thickness direction of the lower vertical connecting plate is greater than the thickness of the thickness plate, the connecting pin is located in the avoidance groove, the connecting pin can be movably inserted into the lower vertical connecting plate, the inner end of the connecting pin is provided with a stopper to prevent the connecting pin from falling off from the lower vertical connecting plate, and the upper end of the thickness plate is rotated with the connecting pin as the axis to the upper end facing downward, the lower end of the thickness plate is lower than the upper side wall of the avoidance groove. When the steel box girder is lowered to align with the thickness plate, the thickness plate is rotated to the lower end facing upward, and then translated to be located in the avoidance groove, and then the steel box girder is further lowered to guide the support on the support step. It can not only make the last utility model easy to take out, but also avoid the steel box girder from damaging the abutment during the descent, and at the same time ensure that the positioning is within the allowable error range. At this time, the thickness of the gauge plate is the allowable error distance between the abutments.

[0009] Preferably, it also includes a stop pin which is simultaneously penetrated on the thickness plate and the lower vertical connection plate, and the stop pin is simultaneously penetrated on the thickness plate and the lower vertical connection plate so as to be pullable. It can prevent the thickness plate from rotating when the steel box girder is lowered. When it is necessary to rotate to the thickness plate, the stop pin is pulled out.

[0010] Preferably, the anti-rotation pin is located below the connecting pin, so that the anti-rotation pin can be pulled out when the steel box girder is lowered as far as possible.

[0011] Preferably, the connecting pin is provided with an elbow for holding. When in use, the connecting pin can be pulled out by grasping the elbow, which makes it convenient to pull out the connecting pin.

[0012] Preferably, the elbow is bent downward, and the lower end of the elbow extends downward beyond the lower end of the thickness-fixing plate by more than 1 cm, which can further improve the convenience of pulling out the anti-rotation pin.

[0013] The utility model has the following beneficial effects: it can reliably position the steel box girder when it falls, does not need manual close control, and has good safety; and can protect the abutment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a moving schematic diagram of an embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the use status of the first embodiment;

[0016] Figure 3 It is a schematic diagram of the second embodiment of the utility model when the thickness determination plate is in the thickness determination position;

[0017] Figure 4 It is a schematic diagram of the second embodiment of the utility model when the thickness-setting plate is in an avoidance state.

[0018] In the figure: a horizontal connecting plate 1, a lower vertical connecting plate 2, a connecting bolt 4, a connecting bolt head 5, an abutment 6, a supporting step 7, a fixing nut 8, a thickness plate 9, a connecting pin 10, a locking nut 11, an upper end surface of the thickness plate 12, an upper vertical connecting plate 13, a steel box girder 14, an inclined guide plate 15, a large diameter section 16, an avoidance groove 17, a locking head 18, a lower end of the thickness plate 19, a locking pin 20, and an elbow 21. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0020] Example 1, see Figure 1 and Figure 2A limiting device for controlling the lowering position of a steel box girder during hoisting comprises a horizontal connecting plate 1 and a lower vertical connecting plate 2 whose upper end is connected to the horizontal connecting plate. The horizontal connecting plate is provided with a through hole of the horizontal connecting plate portion, and a connecting bolt 4 is inserted through the horizontal connecting plate portion. The head 5 of the connecting bolt is located below the horizontal connecting plate, and the head of the connecting bolt is used to be cast on the upper end surface of the abutment 6. A supporting step 7 for supporting the steel box girder is provided on one side of the abutment. The distance that the lower vertical connecting plate extends out of the horizontal connecting plate is less than the distance between the supporting step and the upper end surface of the abutment. The connecting bolt is threadedly connected with a fixing nut 8 located above the horizontal connecting plate. The side of the vertical connecting plate away from the horizontal connecting plate is detachably connected with a calibrating plate 9. Specifically, it is connected to the lower vertical connecting plate through a connecting pin 10, and then the connecting pin passes through the through hole of the calibrating plate portion on the calibrating plate, and a locking nut 11 is connected to the connecting pin to fix the calibrating plate. The upper end surface 12 of the thickness-setting plate is an inclined surface, and the upper end surface of the thickness-setting plate is inclined in a direction away from the horizontal connecting plate. The other end of the horizontal connecting plate is connected to the lower end of the upper vertical connecting plate 13.

[0021] The process of installing and positioning the steel box girder 14 by using the utility model is as follows: pre-embed the connecting bolts on the two abutments of the box girder so that the utility model is fixed on both abutments, the lower vertical connecting plate is located above the supporting step, and a thickness plate with a thickness that meets the positioning requirements is selected and fixed on the lower vertical connecting plate, and then the steel box girder is dropped from between the utility models on the two abutments. When the steel box girder is further lowered, the thickness plates of the utility model on both ends of the utility model on the two abutments are lowered until they are supported on the normal steps, and then the fixing nuts are unscrewed to remove the components of the utility model except the connecting bolts for the next practical use.

[0022] Embodiment 2, the support different from embodiment 1 is:

[0023] See also Figure 3 and Figure 4, one end of the horizontal connecting plate connected to the lower vertical connecting plate is connected to the lower end of the oblique guide plate 15, and the upper end of the oblique guide plate is inclined in the direction away from the thickness plate. A large diameter section 16 is provided at the end of the through hole of the thickness plate away from the horizontal connecting plate, and the anti-slip nut is accommodated in the large diameter section as a whole, and the end of the connecting pin away from the lower vertical connecting plate is limited to the through hole of the thickness plate. A avoidance groove 17 is provided at the lower end of the lower vertical connecting plate, and the avoidance groove is located between the lower end surface of the lower vertical connecting plate and the surface away from the side of the horizontal connecting plate. The dimension of the avoidance groove along the thickness direction of the lower vertical connecting plate is greater than the thickness of the thickness plate, and the connecting pin is located in the avoidance groove. The connecting pin can be movably inserted into the lower vertical connecting plate, and the inner end of the connecting pin is provided with an anti-slip head 18 to prevent the connecting pin from falling off the lower vertical connecting plate. When the upper end of the thickness plate rotates with the connecting pin as the axis to the upper end facing downward, the lower end 19 of the thickness plate is lower than the upper side wall of the avoidance groove. It also includes a stop pin 20 that is simultaneously inserted into the thickness plate and the lower vertical connecting plate. The stop pin is simultaneously inserted into the thickness plate and the lower vertical connecting plate so as to be removable. The stop pin is located below the connecting pin. The connecting pin is provided with an elbow 21 for holding. The elbow is bent downward, and the lower end of the elbow extends downward beyond the lower end of the thickness plate by more than 1 cm.

[0024] After the thickness determination of the thickness determination plate is completed, the anti-rotation pin is pulled out to rotate the thickness determination plate 180 degrees, and then the thickness determination plate is moved toward the lower abutment so that the thickness determination plate is located in the avoidance groove. After the box steel beam is installed, the components of the utility model except the connecting thread are removed from the abutment.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. 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", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A limiting device for controlling the lifting and lowering position of a steel box girder, characterized in that: The bridge sill is provided with a through hole of the flat connecting plate, and the connecting bolt is inserted therein, and the head of the connecting bolt is located below the flat connecting plate, and the head of the connecting bolt is used to be cast on the upper end surface of the abutment, and a supporting step for supporting the steel box girder is provided on one side surface of the abutment, and the distance that the lower vertical connecting plate extends out of the flat connecting plate is less than the distance between the supporting step and the upper end surface of the abutment, and the connecting bolt is threadedly connected with a fixing nut located above the flat connecting plate, and the side of the vertical connecting plate away from the flat connecting plate is detachably connected with a calibrating plate, and the upper end surface of the calibrating plate is an inclined surface, and the upper end surface of the calibrating plate is inclined in the direction away from the flat connecting plate.

2. A limiting device for controlling the lifting and lowering position of a steel box girder according to claim 1, characterized in that: The other end of the horizontal connecting plate is connected to the lower end of the upper vertical connecting plate.

3. A limiting device for controlling the lifting and lowering position of a steel box girder according to claim 1 or 2, characterized in that: One end of the horizontal connecting plate connected to the lower vertical connecting plate is connected to the lower end of the inclined guide plate, and the upper end of the inclined guide plate is inclined in a direction away from the thickness calibrating plate.

4. A limiting device for controlling the lifting and lowering position of a steel box girder according to claim 1 or 2, characterized in that: The thickness fixing plate is provided with a thickness fixing plate through hole, and the end of the thickness fixing plate through hole away from the horizontal connecting plate is provided with a large diameter section, and the lower vertical connecting plate is provided with a connecting pin which passes through the thickness fixing plate through hole, and the connecting pin is threadedly connected with a locking nut which prevents the thickness fixing plate from falling off the connecting pin, and the locking nut is entirely accommodated in the large diameter section, and the end of the connecting pin away from the lower vertical connecting plate is confined in the thickness fixing plate through hole.

5. A limiting device for controlling the lifting and lowering position of a steel box girder according to claim 4, characterized in that: An avoidance groove is provided at the lower end of the lower vertical connecting plate, and the avoidance groove is located between the lower end surface of the lower vertical connecting plate and the surface on the side away from the horizontal connecting plate. The dimension of the avoidance groove along the thickness direction of the lower vertical connecting plate is greater than the thickness of the thickness-setting plate. The connecting pin is located in the avoidance groove, and the connecting pin can be movably inserted into the lower vertical connecting plate. The inner end of the connecting pin is provided with a locking head for preventing the connecting pin from falling off the lower vertical connecting plate. When the upper end of the thickness-setting plate is rotated with the connecting pin as the axis until the upper end faces downward, the lower end of the thickness-setting plate is lower than the upper side wall of the avoidance groove.

6. A limiting device for controlling the lifting and lowering position of a steel box girder according to claim 5, characterized in that: It also includes a stop pin that is simultaneously penetrated through the thickness determination plate and the lower vertical connecting plate. The stop pin is simultaneously penetrated through the thickness determination plate and the lower vertical connecting plate in a pull-out manner.

7. A limiting device for controlling the lifting and lowering position of a steel box girder according to claim 6, characterized in that: The anti-rotation pin is located below the connecting pin.

8. A limiting device for controlling the lifting and lowering position of a steel box girder according to claim 7, characterized in that: The connecting pin is provided with a bend for holding.

9. A limiting device for controlling the lifting and lowering position of a steel box girder according to claim 8, characterized in that: The elbow is bent downward, and the lower end of the elbow extends downward beyond the lower end of the thickness-fixing plate by more than 1 cm.

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