CN111676830A - A kind of jack lifting equipment and lifting method thereof - Google Patents

Abstract

A jack lifting device and a lifting method thereof, comprising a travel support system (1), a translation system (2) installed on the outside of the travel support system, and a lifting system (3) connected to the translation system; the travel support system includes using A support frame (11) with a three-dimensional rectangular shape formed by welding metal components, four vertical rods (12) welded to the four corners of the bearing frame, and a universal wheel (13) mounted on the bottom end of the vertical rods; the translation system includes: A rectangular rail frame (21) arranged on the outside of the support frame, and a translation trolley (22) installed in the rectangular rail frame and capable of reciprocating along the upper and lower rails. The invention effectively solves the problems of inconvenient positioning of the jack for high-altitude operation and difficult operation during the prestressed tensioning construction of the upper structure of the bridge, and has a stable structure, simple operation and safe construction.

Description

A kind of jack lifting equipment and lifting method thereof

technical field

The invention relates to the technical field of highway engineering construction, in particular to a novel jack hoisting device and a hoisting method thereof suitable for prestressed tension construction of a bridge upper structure.

Background technique

With the increasing span of bridges, the use of prestressing in bridge structures is becoming more and more extensive. In the traditional prestressed tensioning construction process, simple spreaders such as steel wire ropes or nylon ropes are used to hoist the jack. During the process of the jack in place, there are often problems of swing and rotation, which makes the installation of the jack in place during the tensioning operation. At the same time, if the tonnage of the applied prestress is large, the weight of the jack will increase accordingly, and the construction operation of the jack at the tensioning place requires two operators to cooperate with each other, and there is a great potential safety hazard.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a jack hoisting device that is easy to operate, safe to use, and can be used in turnaround, so as to quickly make the jack smoothly in place, increase construction efficiency, and ensure construction safety. The present invention also provides a lifting method of such a device.

To achieve the above object, the technical scheme adopted by the present invention is as follows:

A jack hoisting device includes a traveling support system, a translation system installed on the outside of the traveling support system, and a lifting system connected to the translation system;

The traveling support system includes a support frame with a three-dimensional rectangular shape formed by welding metal components, four vertical rods welded in the four corners of the bearing frame, and a universal wheel installed at the bottom end of the vertical rod;

The translation system includes a rectangular rail frame arranged on the outside of the support frame, and a translation trolley installed in the rectangular rail frame and reciprocating along the upper and lower rails; the top frame and the bottom frame of the rectangular rail frame are opposite to each other. track groove; the translation trolley includes a rectangular frame, upright rollers respectively installed on the outer sides of the upper beam and the lower beam of the rectangular frame, and flat rollers installed at the top and bottom ends of the columns on both sides of the rectangular frame respectively; the upright rollers The flat rollers are placed in the track grooves of the rectangular track frame; the upper beam and the middle of the lower beam of the rectangular frame are welded with outstretched connecting clips;

The lifting system includes a base, a vertical threaded column installed on the base, an inner threaded sleeve sleeved on the vertical threaded column, a locking rod inserted into the inner threaded sleeve, and sleeved on the vertical threaded column. The hand wheel is located above the inner threaded sleeve, the thrust ball bearing that is sleeved on the vertical threaded column and can withstand the hand wheel hub, the bottom plate welded on the inner side of the base, and the two main rails installed on the bottom plate with opposite notches , an outer trolley installed in the main track and reciprocating, and an inner trolley installed in the outer trolley; the outer trolley includes a rectangular frame-type carriage, two front and rear outer trolley axles installed at the bottom of the carriage, and a The outer trolley wheels at both ends of the outer trolley axle, the two sides of the carriage are channel steel pieces with opposite notches, the outer trolley wheels are fitted in the main track of the trolley and move back and forth along the main track, and the front end of the carriage is provided with an outer trolley limit screws; the inner trolley includes a vehicle body, two front and rear inner trolley axles installed at the bottom of the vehicle body, and inner trolley wheels installed at both ends of the inner trolley axle, and the inner trolley wheels are fitted in the two sides of the outer trolley compartment. It moves back and forth along the box frame, and a jack is installed on the top of the front end of the car body to support the rotating shaft; the bottom of the extended track is provided with an extended track limit screw; welding, and a derailment-preventing blocking bolt is installed on the front end of the bottom plate.

Further, an extension rail that can be rotated along the hinge shaft is connected to the outer end of the main rail through a hinge shaft; the bottom plate includes a main bottom plate and a middle connecting plate for installing the main rail, which are laid at intervals, and the main bottom plate has an extension extending to In the lap section outside the main track, the middle connecting plate is located at the bottom of the outer end of the main track. When the extended track is rotated to back-to-back against the main track, the extended track is fixed on the lap section by connecting screws; at the bottom of the extended track by connecting The screw is attached with an additional connecting plate, which is used to connect and stabilize the two extended rails when the extended rails are unfolded.

Further, a supporting steel frame is welded inside the top surface of the supporting frame.

The lifting method of the jack lifting device of the present invention is as follows:

S1. During the prestressed tensioning construction of the upper structure of the bridge, install the jack oil pump to be used on the oil pump bracket welded on the outside of the support frame, and install the jack on the jack of the lifting system through the jack connection frame with the top plate On the support shaft, place the universal wheel of the traveling support system on the bridge, the translation system and the lifting system are suspended on the outside of the bridge, and the bottom plate, the track installed on the bottom plate, the trolley and the supporting jack extend to the bottom of the bridge;

S2. Push the running support system, the universal wheel rotates, and the entire lifting equipment travels along the bridge surface to the construction position;

S3. Push the translation trolley to move along the rectangular track frame to perform preliminary adjustment of the position of the jack;

S4. Turn the handwheel to drive the vertical threaded column down, and lower the jack placed on the jack support shaft. At the same time, the outer trolley, inner trolley, main track and bottom plate can pass through the vertical threaded column, threaded sleeve and thrust ball. The bearing rotates to make a rough adjustment of the jack angle, and then tighten the locking rod to lock the vertical threaded column;

S5. According to the distance between the jack and the tensioning position, push the outer trolley to move along the main track. At the same time, the outer trolley of the outer trolley serves as the track of the inner trolley, which can push the inner trolley to further increase the range of movement of the jack; it can also be supported by the jack The shaft and the jack connecting frame are used for fine adjustment of the jack angle;

S6. Repeat the above steps to align the jack with the anchor at the tensioning place, and complete the lifting of the jack into place.

In the above-mentioned step S5, the lengthened track is rotated along the hinge shaft, the lengthened track is unfolded, the lengthened track is spliced with the main track, and the track on which the outer trolley travels is extended; after the lengthened track is spliced with the main track, the additional connecting plate is removed and connected horizontally. On the outer ends of the two elongated rails, use connecting screws to connect and fix the two ends of the additional connecting plate with the outer ends of the elongated rails to prevent the elongated rails from being scattered.

The invention sends the jack to the construction tensioning place through the linkage action of each system, improves the prestressed tensioning construction efficiency, and effectively solves the problem of difficulty in installing the jack in place. The lifting device of the present invention has a stable structure and is safe and reliable to use.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the front view of the present invention;

Fig. 3 is the left side view of the present invention;

Fig. 4 is the top view of the present invention;

Fig. 5 is the structural representation of the pole;

Fig. 6 is the structural representation of the translation trolley;

Fig. 7 is the structural decomposition schematic diagram of the lifting system;

8 is a schematic side view of the present invention when the jack is lifted;

FIG. 9 is a schematic bottom view of the present invention when the jack is lifted.

Detailed ways

The present invention will now be further described with reference to the accompanying drawings and examples, in which like reference numerals represent elements of the invention. The present invention is suitable for the jack lifting of the prestressed tension construction of the upper structure of the bridge, but is not limited to this, and can also be used in the construction process of other engineering types.

As shown in Figures 1 to 4, a jack lifting device includes a traveling support system 1, a translation system 2 installed on the outside of the traveling support system, and a lifting system 3 connected to the translation system.

As shown in FIGS. 1 to 5 , the traveling support system 1 includes a support frame 11 with a three-dimensional rectangular shape formed by welding metal components, four vertical rods 12 welded in the four corners of the bearing frame, Universal wheel 13. A vertical and horizontally interwoven supporting steel frame 111 is welded inside the top surface of the supporting frame 11 to increase the strength and rigidity of the supporting frame. The support frame 11 is welded with square steel pipes. The vertical rod 12 is also made of square steel pipe. The mounting holes 121 are machined at equal intervals on the vertical rod, and the limit steel plate 122 that the vertical rod can pass through is arranged. Move up and down in the square hole on the limit steel plate, and insert the clip 123 into the installation hole at the bottom of the limit steel plate to realize the positioning of the pole. The installation height of the support frame 11 can be adjusted by adjusting the insertion hole positions of the clips on the vertical rod.

As shown in FIGS. 1-4 and 6 , the translation system 2 includes a rectangular rail frame 21 disposed outside the support frame, and a translation trolley 22 installed in the rectangular rail frame and reciprocating along the upper and lower rails. The top frame and the bottom frame of the rectangular track frame 21 are provided with track grooves with opposite notches. The translation trolley includes a rectangular frame 221, upright rollers 222 installed on the outer sides of the upper and lower beams of the rectangular frame, and flat rollers 223 installed on the top and bottom ends of the two sides of the rectangular frame. The vertical rollers 222 and the flat rollers 223 are placed in the track grooves of the rectangular track frame. An overhanging connection card plate 224 is welded to the middle of the upper beam and the lower beam of the rectangular frame.

As shown in FIGS. 1 to 4 and 7 , the lifting system 3 includes a base 31 , a vertical threaded column 32 mounted on the base, an internally threaded sleeve 33 sleeved on the vertical threaded column, and inserted into the The locking rod 331 on the threaded sleeve, the hand wheel 333 sleeved on the vertical threaded post and located above the inner threaded sleeve 33, the thrust ball bearing 332 sleeved on the vertical threaded post and against the hub of the handwheel, The bottom plate welded on the inner side of the base, the main rail 35 installed on the bottom plate with opposite notches, the outer trolley 36 installed in the main rail and reciprocating, and the inner trolley 37 installed in the outer trolley and reciprocating. The internally threaded sleeve 33 includes a sleeve jack 334 and a sleeve bottom liner 335 . The thrust ball bearing 332 is assembled in the sleeve jack 334 , and the top surface of the thrust ball bearing contacts the bottom surface of the hub of the handwheel 333 . The outer trolley includes a rectangular frame-type carriage 361, two front and rear outer trolley axles 362 installed at the bottom of the carriage, and outer trolley wheels 363 installed at both ends of the outer trolley axle. , the wheel of the outer trolley is assembled in the main track of the trolley and moves back and forth along the main track, and a limit screw 364 of the outer trolley is arranged on the outer side of the front end of the carriage. The inner trolley 37 includes a vehicle body 371, two front and rear inner trolley axles 372 installed at the bottom of the vehicle body, and inner trolley wheels 373 installed at both ends of the inner trolley axle. Inside the notch and moving back and forth along the box frame, a freely rotatable jack is installed on the top of the front end of the vehicle body to support the shaft 374 . At the bottom of the elongated rail 30 is an elongated rail limit screw 301 . The inner threaded sleeve 33 is welded with the upper and lower connecting plates 224 of the translation system, and an anti-derailment blocking bolt 39 is installed at the front end of the bottom plate, and the outer trolley 36 is limited to the set by the anti-derailing blocking bolt 39. In the main rail 35 , the inner end of the main rail and the bottom plate are welded with the bottom of the base 31 . The vertical threaded column 32 is anchored to the inner threaded sleeve 33 by rotating the hand wheel 333 and the thrust ball bearing 332 .

The outer end of the main rail 35 is connected with an elongated rail 30 that can rotate along the hinge shaft through a hinge shaft 38; the bottom plate includes a main bottom plate 341 and a middle connecting plate 342 for installing the main rail, which are laid at intervals. There is a lap section 343 extending to the outside of the main track. The middle connecting plate 342 is located at the bottom of the outer end of the main track. When the extension rail 30 is rotated to back to back against the main track, the extension rail is fixed on the lap section 343 by connecting screws 301. On the bottom of the elongated rail, an additional connecting plate 344 is attached through a connecting screw, which is used to connect and stabilize the two elongated rails when the elongated rail is unfolded.

By adopting the present invention, the jack can be installed on the jack supporting shaft of the hoisting system, the present invention can be driven to the construction position by the running bracket system, the position of the jack can be preliminarily adjusted by the translation system, and the jack can be accurately sent to the construction by the hoisting system. tension position. As shown in Figure 1 to Figure 9, the specific lifting method is as follows:

S1. When carrying out the prestressed tension construction of the upper structure of the bridge, install the jack oil pump 4 to be used on the oil pump bracket 4a welded on the outside of the support frame 11, and install the jack 5 on the jack connecting frame 5a with the top plate. On the jack support shaft 374 of the lifting system 3, the universal wheel 13 of the walking support system 1 of the present invention is placed on the bridge 6, the translation system 2 and the lifting system 3 are suspended on the outside of the bridge, and the base plate and the base plate are installed. The track, the trolley and the supporting jack extend below the bridge; the jack supporting shaft 374 is a rotatable part, the jack connecting frame 5a and the jack supporting shaft are connected to each other, and various simple and stable connection methods can be selected for the connection method. The connection method of the example is to connect the bottom frame of the jack connecting frame and the two ends of the connecting rod horizontally passing through the jack supporting shaft;

S2. Push the running support system 1, the universal wheel 13 rotates, and the present invention travels along the bridge surface to the construction position;

S3. Push the translation trolley 22 to move along the rectangular track frame 21 to perform preliminary adjustment of the jack position;

S4. Turn the hand wheel 333 to drive the vertical threaded column 32 to descend, and lower the jack 5 placed on the jack support shaft 374. At the same time, the outer trolley 36, the inner trolley 37, the main rail 35 and the bottom plate can pass through the vertical threaded column. 32. Rotate the threaded sleeve 33 and the thrust ball bearing 332 to make a rough adjustment of the jack angle, and then tighten the locking rod 331 to lock the vertical threaded column 32;

S5. Check the distance between the jack 5 and the tensioning position. By rotating the extended rail 30 along the hinge shaft 38, the extended rail 30 can be unfolded, and the extended rail 30 can be spliced with the main rail 35 to extend the track on which the outer trolley 36 travels, and the extended rail 30 After splicing with the main rail 35, remove the additional connecting plate 344 and connect it laterally to the outer ends of the two elongated rails, and use the connecting screws 301 to connect the two ends of the additional connecting plate to the outer ends of the elongated rails to prevent the elongated rails from spreading. , at this time, the outer trolley 36 can move in the extended track 30 and the main track 35; according to the distance between the jack 5 and the tensioning position, the outer trolley 36 can be pushed to increase the range of movement of the jack, while the outer trolley compartment of the outer trolley 36 361 is used as the track of the inner trolley 37, which can push the inner trolley 37 to further increase the movement range of the jack, so as to meet the position where the jack is close to the tensioning position; the jack angle can also be finely adjusted through the jack support shaft 374 and the jack connecting frame 5a;

S6. Repeat the above steps to make the jack 5 align with the anchor 7 at the tensioning place to complete the lifting of the jack into place.

The above disclosures are only the preferred embodiments of the present invention, which of course cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope of the present invention.

Claims (5)

1. A jack lifting device, characterized in that it comprises a running support system (1), a translation system (2) installed on the outside of the running support system, and a lifting system (3) connected to the translation system; The traveling support system (1) includes a support frame (11) with a three-dimensional rectangular shape formed by welding metal components, four vertical rods (12) welded in the four corners of the bearing frame, and a universal wheel mounted on the bottom end of the vertical rod. (13); The translation system (2) includes a rectangular rail frame (21) arranged on the outside of the support frame, and a translation trolley (22) installed in the rectangular rail frame and capable of reciprocating along the upper and lower rails; the rectangular rail frame (21) The top frame and the bottom frame are provided with track grooves with opposite notches; the translation trolley includes a rectangular frame (221), upright rollers (222) respectively installed on the outer sides of the upper beam and the lower beam of the rectangular frame, respectively installed Flat rollers (223) on the top and bottom ends of the uprights on both sides of the rectangular frame; the vertical rollers (222) and the flat rollers (223) are placed in the track grooves of the rectangular track frame; The middle part of the lower beam is welded with an overhanging connecting clip plate (224); The lifting system (3) comprises a base (31), a vertical threaded column (32) mounted on the base, an inner threaded sleeve (33) sleeved on the vertical threaded column, and inserted on the inner threaded sleeve The locking rod (331), the hand wheel (333) sleeved on the vertical threaded column and located above the inner threaded sleeve (33), the thrust ball bearing sleeved on the vertical threaded column and against the hub of the hand wheel (332), a bottom plate welded on the inner side of the base, a main rail (35) installed on the bottom plate with two notches facing each other, an outer trolley (36) installed in the main track and capable of reciprocating travel, and a trolley mounted in the outer trolley An inner trolley (37) that travels back and forth; the outer trolley (36) includes a rectangular frame-type carriage (361), two front and rear outer trolley axles (362) mounted on the bottom of the carriage, and outer trolley wheels mounted on both ends of the outer trolley axle (363), the two side frames of the carriage are channel steel pieces with opposite notches, the outer trolley wheels are fitted in the main track of the trolley and move back and forth along the main track, and the front end of the carriage is provided with an outer trolley limit screw (364); The inner trolley (37) comprises a vehicle body (371), two front and rear inner trolley axles (372) installed at the bottom of the vehicle body, and inner trolley wheels (373) installed at both ends of the inner trolley axle, and the inner trolley wheels are fitted on the inner trolley. A jack supporting shaft (374) is installed at the top of the front end of the car body; an anti-derailment blocking bolt (39) is installed at the front end of the bottom plate; the The inner thread sleeve (33) is welded with the upper and lower connecting clips (224) of the translation system. 2. A jack lifting device according to claim 1, characterized in that, an elongated rail (30) that can rotate along the hinge shaft is connected at the outer end of the main rail (35) through a hinge shaft (38); The bottom plate comprises a main bottom plate (341) and a middle connecting plate (342) for installing the main rail, which are laid at intervals, and the main bottom plate (341) is provided with a lap section (343) extending to the outside of the main track, and the middle connecting plate (342) ) is located at the bottom of the outer end of the main rail, when the extended rail (30) is rotated to back-to-back against the main rail, the extended rail is fixed on the lap section (343) by connecting screws (301); An additional connecting plate (344) is attached to connect and stabilize the two extended rails when the extended rails are unfolded. 3. A jack lifting device according to claim 1 or 2, wherein a supporting steel frame (111) is welded inside the top surface of the supporting frame (11). 4. the lifting method of jack lifting equipment as claimed in claim 1, is characterized in that, method is as follows: S1. During the prestressed tensioning construction of the upper structure of the bridge, install the jack oil pump (4) to be used on the oil pump bracket (4a) welded on the outside of the support frame (11), and pass the jack (5) through the belt The jack connecting frame (5a) of the top plate is installed on the jack supporting shaft (374) of the lifting system (3), and the universal wheel (13) of the traveling support system (1) is placed on the bridge (6), and the horizontal The moving system (2) and the hoisting system (3) are suspended on the outside of the bridge, and the bottom plate, the track installed on the bottom plate, the trolley and the supporting jack extend below the bridge; S2. Push the traveling support system (1), the universal wheel (13) rotates, and the entire lifting equipment travels along the bridge surface to the construction position; S3. Push the translation trolley (22) to move along the rectangular track frame (21) to perform preliminary adjustment of the position of the jack; S4. Turn the hand wheel (333) to drive the vertical threaded column (32) down, and lower the jack (5) placed on the jack supporting shaft. At the same time, the outer trolley (36), the inner trolley (37), the main track (35) and the bottom plate can be rotated through the vertical threaded column (32), the threaded sleeve (33) and the thrust ball bearing (332), so as to make a rough adjustment of the jack angle, and then tighten the locking rod (331) to lock the vertical Straight thread post(32); S5. According to the distance between the jack (5) and the tensioning position, push the outer trolley (36) to move along the main track (35), while the outer trolley carriage (361) of the outer trolley serves as the track of the inner trolley (37), which can push the inner trolley (37). The trolley can further increase the range of movement of the jack; the jack angle can also be finely adjusted through the jack support shaft (374) and the jack connecting frame (5a); S6. Repeat the above steps to make the jack (5) align with the anchor (7) at the tensioning place, and complete the lifting of the jack into place. 5. The lifting method of the jack lifting device according to claim 4, wherein in the above step S5, the extended rail (30) is rotated along the hinge shaft (38), the extended rail (30) is unfolded, and the extended rail is connected with the main rail. The tracks (35) are spliced to extend the track on which the outer trolley (36) travels; after the extended track is spliced with the main track, remove the additional connecting plate (344) and connect it laterally to the outer ends of the two extended tracks, using connecting screws (301 ) Connect the two ends of the additional connecting plate to the outer end of the extended track to prevent the extended track from spreading out.

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