CN101818480B - Box girder transfer platform and girder transferring and girder loading working procedures thereof - Google Patents

Abstract

The invention relates to a box girder transfer platform and its beam moving and beam loading procedures, wherein the platform includes a beam trolley, a telescopic arm, a beam assembly, a portal frame, a drive system, a hydraulic system and an electrical system, and the beam trolley is installed On the telescopic arm, the telescopic arm is supported by the portal frame connected to the embedded foundation and the beam assembly on it. The driving device of the drive system is arranged at the rear end of the telescopic arm, and the guide wheels of the drive system are arranged at the front and rear of the telescopic arm. On the end face, the pump station of the hydraulic system is located on the main beam of the portal frame, and the main cabinet of the electrical system is arranged on the main beam of the portal frame. After the girder, the box girder is moved to the side of the bridge deck, and the integrated bridge-erecting machine runs to the side of the transfer platform, and feeds the beam to the integrated bridge-erecting machine from the side, realizing the parallel construction of beam transport and bridge erection, which greatly improves The girder erecting speed of the integrated bridge erecting machine.

Description

A box girder transfer platform and its beam moving and beam loading procedures

technical field

The invention relates to a box girder transfer platform and its beam moving and beam loading procedures.

Background technique

With the further strengthening and development of my country's infrastructure, the construction of various infrastructures is entering a rapid and steady development stage. The "Eleventh Five-Year Plan" of railways shows that China's railways have entered a stage of leapfrog development, especially since the economic crisis. my country has increased investment in infrastructure such as railways and highways, and railway construction has reached an unprecedented peak. As my country's railway construction enters a stage of continuous and rapid development, a key problem to be solved in the aspect of railway construction is how to carry out railway construction with low construction cost and high construction efficiency to meet the growing demand. So as to keep up with the pace of economic development.

At present, in the process of railway construction, in order not to occupy land and ensure the safety of railway operation, the proportion of elevated parts on railways is increasing. In elevated lines, large concrete box girders are used as weight supports. Important components on elevated routes, and due to the heavy weight of such large concrete box girders, it is very difficult to transport and construct elevated railways. At present, two construction methods are usually used for this kind of box girder: one is to use the beam transporter to realize the transport of the box girder, and then the supporting bridge erecting machine directly takes the beam from the beam transporter and erects the bridge at the construction site. The first construction method is called the separated type of transport frame, which can realize parallel operation and high construction efficiency, but the construction cost is relatively high; while the other method uses the integrated bridge erecting machine to directly take the beams from the prefabricated beam yard and transport them directly Go to the construction site to build bridges to achieve sequential operations. This method has low construction cost, but the construction efficiency is very low.

Therefore, in order to improve the bridge erecting efficiency of the integrated bridge erecting machine, it is necessary to use a beam transport vehicle to transport the beams for the integrated bridge erecting machine, which can greatly save time and improve efficiency, but because the beam transport vehicle and the integrated frame transport The bridge machine is on the same passage on the bridge deck, and the beam transport vehicle cannot directly feed the beam for the integrated bridge erecting machine from the side. The way to solve this problem is to set up a transfer platform between the beam making yard and the bridge erection site, through which the box girders are taken from the beam truck and transferred to the side of the bridge deck, and then transported from the side through the transfer platform. The integrated bridge erecting machine feeds the beam to realize the effective combination of the beam transport vehicle and the integrated bridge erecting machine, so as to achieve parallel operation and improve efficiency.

And when the prefabricated girder yard loads the girder for the integrated bridge erecting machine with transport and frame, it is impossible to directly feed the beams on the beam lifting machine from the back of the integrated bridge erection machine with transport and frame. Therefore, it is usually necessary to set up a special rotating platform on the outside of the bridge deck of the prefabricated beam yard at the construction site, through which the beam loading operation is performed, but the existing beam loading process is complicated and cannot be adapted to the loading and unloading of beams of different specifications.

Therefore, it is necessary to provide a set of economical, practical and efficient box girders that can complete the effective combination of the beam transport vehicle and the integrated bridge erecting machine, and realize the entire bridge erection process from the prefabricated beam yard, beam transport to beam erection. Transfer platform and its beam moving process and span changing process.

Contents of the invention

The object of the present invention is to aim at the above-mentioned present situation, provide a kind of can complete the effective combination of beam transport vehicle and frame transport integrated bridge erecting machine, realize the whole bridge erecting process such as taking beam from prefabricated beam yard, transporting beam, feeding beam, erecting beam, and An economical and practical box girder transfer platform with high construction efficiency and its beam moving, span changing and beam loading procedures.

In order to achieve the above object, the present invention discloses a box girder transfer platform, wherein the platform includes a carrying beam trolley, a telescopic arm, a beam assembly, a portal frame, a drive system, a hydraulic system and an electrical system, and the carrying beam trolley is installed on On the telescopic arm, the telescopic arm is supported by the portal frame connected to the embedded foundation and the beam assembly on it, the driving device of the drive system is arranged at the rear end of the telescopic arm, and the guide wheels of the drive system are arranged on the front and rear ends of the telescopic arm Above, the pump station of the hydraulic system is located on the main beam of the portal frame, and the main cabinet of the electrical system is arranged on the main beam of the portal frame.

Among them, the beam trolley is composed of a steel pad, a trolley frame, an adjustable chain mounting seat, a transfer device, a pull rod, a bolt fixing support and a roller device; wherein: the steel pad is fixed on the trolley frame, and one end of the trolley frame passes through The pull rod is connected with the pin fixed support, the other end of the trolley frame is installed with an adjustable chain mounting seat, and the bottom of the trolley frame is equipped with a transfer device; wherein, the adjustable chain mounting seat is composed of a chain seat, a screw rod, a chain baffle, a chain pin shaft, The chain base is composed of a reinforcing rib plate; among them, the chain base is equipped with a screw rod, a chain pin shaft and a chain baffle, the screw rod and the nut welded on the frame of the trolley are screwed together, and the chain pin shaft is connected with the chain of the drive system. The chain base supports the chain base to move thereon.

Among them, the telescopic arm is composed of screw rod assembly, end hinge support, end pad beam assembly, long arm, outrigger assembly, pole beam and stopper; wherein, the long arm is composed of a box-shaped structural beam and a bolt sleeve in the structural beam One end of the screw assembly is connected to the end pad beam assembly through the end hinge support, and the other end can be screwed with the threaded sleeve on the long arm; wherein, the outrigger assembly is composed of a screw assembly, a baffle and a hinge seat, and the screw assembly The ball head is installed between the baffle plate and the hinge seat connected by bolts. The shoulder pole beam is composed of a support beam and a spiral sleeve arranged in the support beam and screwed with the screw assembly. One end of the outrigger assembly is connected to the long arm, and the other end is Connect pole beams.

Among them, the crossbeam assembly is composed of an upper reverse buckle support, a transfer device assembly, a beam, a bolt support, a variable span oil cylinder assembly, a bolt, a guide support assembly, a lower reverse buckle support and a lower reverse buckle screw; Among them, the upper reverse buckle support, transfer device assembly, latch support, latch and guide support assembly are located on the upper surface of the beam, the variable-span oil cylinder assembly is located on the side of the beam, and the lower reverse buckle support and lower reverse buckle screw are located on the The lower surface of the beam.

Among them, the telescopic control device is also included, and the telescopic control device is composed of a pin-fixed support and a roller device on the beam trolley, a bolt fixed by a flange plate, a bolt support, a transfer device assembly, and a bolt sleeve on the telescopic arm. Composition, under the control of the telescopic control device, the telescopic arm can be stretched under load.

Among them, a set of driving mechanism can drive the expansion and contraction of the telescopic arm and the walking of the beam trolley under the control of the telescopic control device; the driving mechanism is composed of a driving device, a left guide wheel, a right guide wheel and a roller chain. One end of the roller chain The adjustable chain mounting seat on the pack beam trolley is connected to the frame of the pack beam trolley, through the driving device, the right guide wheel and the left guide wheel installed on the telescopic arm, and finally through the adjustable chain on the other end of the pack beam trolley. The chain mounting seat is connected with the platform frame at the other end of the pack beam trolley.

Among them, the box girder on the beam transport vehicle is removed and stretched to the outside of the bridge deck, and the integrated bridge erecting machine with transport and frame runs to the side of the transfer platform, and then feeds the beam for the integrated bridge erection machine with transport and frame from the side.

Wherein, the process includes the following steps:

a. The telescopic arm stretches to the outside of the bridge deck to get out of the way of the bridge deck; the girder truck carries the box girder to the transfer platform for alignment;

b. The telescopic arm is extended to the bridge deck, and the screw support is installed;

c. The carrying beam trolley walks to the position below the box girder, the beam transporting vehicle drops the beam, the box girder falls on the support of the carrying beam trolley, and the beam transporting vehicle unloads;

d. The beam trolley carries the box girder to the outside of the bridge deck;

e. Remove the screw support, stretch the telescopic arm to the outside of the bridge deck, and return the beam truck to the beam yard to take the beam;

f. The transport-frame integrated bridge erecting machine runs without load to the alignment of the transfer platform;

g. The telescopic arm is stretched out to the bridge deck, and the screw support is installed;

h. The beam trolley carries the box girder to the bottom of the integrated bridge erecting machine;

i. The box girder is lifted by the integrated bridge erecting machine;

j. The beam trolley runs to the outside of the bridge deck with no load, removes the screw support, moves the telescopic arm to the outside of the bridge deck, clears the bridge deck passage, and transports the integrated bridge erecting machine to erect the girder.

Its beam installation process includes the following steps:

a. The beam lifting machine extracts the beam pieces from the prefabricated beam field and puts them on the transfer platform;

b. The integrated bridge erecting machine runs without load to the alignment of the transfer platform;

c. Extend the telescopic arm of the transfer platform to the bridge deck and install the screw support;

d. The beam trolley carries the box girder and moves to the lower part of the integrated bridge erecting machine;

e. The box girder is lifted by the integrated bridge erecting machine;

f. The beam trolley runs to the outside of the bridge deck with no load, removes the screw support, moves the telescopic arm to the outside of the bridge deck, clears the bridge deck passage, and transports the integrated bridge erecting machine to erect the girder.

When the telescopic arm stretches to the outside of the bridge deck or the girder lifting machine picks up the girder pieces from the prefabricated girder field, the transfer platform has completed the span-changing process according to the specifications of the box girder to be transferred. The span-changing process includes the following steps:

a. Stop the telescopic arm and the beam trolley when the center of gravity is at the center of the mast;

b. Loosen the four top tightening screw rods of the bottom buckle;

c. Change the position of the oil cylinder seat continuously until the span change operation is completed.

Through the above structure, the present invention has been successfully used in the construction of Guangzhou-Zhuhai intercity rail transit, and has been proved to have the following advantages:

1. For the first time, the method of side beam moving and beam feeding is adopted

Using the beam truck to transport the girder for the integrated bridge erecting machine breaks through the beam taking method of the integrated bridge erecting machine, and feeds the box girder on the beam transport vehicle to the integrated bridge erecting machine from the side, which has no such history at home and abroad example. The platform can move the box girder to one side of the bridge deck after taking the girder from the girder truck, and after the integrated bridge erecting machine runs to the side of the transfer platform, it can feed the beam to the integrated bridge erecting machine from the side, realizing the beam transportation Parallel to bridge construction. Moreover, before the integrated bridge erecting machine arrives at the prefabricated girder field, the girder lifting machine can extract the girder pieces from the prefabricated girder field and put them on the transfer platform to prepare for girder loading, which further saves time and improves efficiency.

2. It does not affect the existing traffic, does not need to be demolished, and has good environmental protection performance;

3. Beam moving is safe and reliable, flexible and convenient to operate, low platform cost, high construction efficiency, and can reach the theoretical transfer efficiency of 1.5 hours per beam.

Description of drawings

Fig. 1A is a front view of the structure of the transport platform of the present invention.

Fig. 1B is a left view of the transport platform structure of the present invention.

Fig. 2 is the front view of the structure of the pack beam trolley.

Fig. 3 is a front view of the telescopic arm structure.

Fig. 4A is a front view of the beam assembly structure.

Fig. 4B is a side view of the beam assembly structure in the A-A direction.

Fig. 4C is a side view of the beam assembly structure in the B-B direction.

Fig. 4D is a side view of the beam assembly structure in the C-C direction.

Fig. 5A is a front view of the gantry structure.

Fig. 5B is a left side view of the gantry structure.

Fig. 6A is a front view of the drive system structure.

Fig. 6B is a left view of the drive system structure.

Fig. 7 is a front view of the structure of the telescoping control device.

Fig. 8 is a schematic diagram of the beam moving process of the present invention.

Figure 9A is a front view of an adjustable chain mount.

Fig. 9B is a side view along A-A of the adjustable chain mount shown in Fig. 9A.

Fig. 9C is a top view along B-B of the adjustable chain mounting seat shown in Fig. 9A.

Fig. 10 is a schematic diagram of the outrigger assembly of the present invention.

Figure 11A is a front view of the transporter assembly of the present invention.

Figure 1 IB is a side view of the transporter assembly of the present invention.

Fig. 12 is a schematic diagram of the span variable cylinder assembly of the present invention.

Detailed ways

Referring to Fig. 1, it is a box girder transfer platform of the present invention, which is mainly composed of a beam trolley 1, a telescopic arm 2, a beam assembly 3, a portal frame 4, a drive system 5, a hydraulic system 6, and an electrical system 7. Among them, the hydraulic system 6 can be composed of a pumping station and related actuators. When used to complete the beam moving requirements of box girders with different spans, the pumping station and actuators that meet the requirements can be selected according to the needs; and the electrical system 7 can be controlled by a frequency converter. , control box, electrical cabinet, etc., mainly realize overcurrent, overvoltage, undervoltage, leakage and other protections and centralized control of all actions (such as linkage, emergency stop, etc.), since the hydraulic system 6 and electrical system 7 are both well known techniques and therefore will not be described in detail. The beam trolley 1 is installed on the telescopic arm 2, and the telescopic arm 2 is supported by the portal frame 4 connected to the embedded foundation and the beam assembly 3 on it, and the driving device of the driving system 5 is arranged at the rear end of the telescopic arm 2, The guide wheels of the driving system 5 are arranged on the front and rear ends of the telescopic arm 2 , the pump station of the hydraulic system 6 is located on the main beam of the portal frame 4 , and the main cabinet of the electrical system 7 is arranged on the main beam of the portal frame 4 .

Now referring to Fig. 2, it shows the carrying beam dolly 1 of the present invention. 16 and roller device 17 form. Among them, the steel pad 11 is fixed on the trolley frame 12 to support the box girder. When the box girder is transported, the box girder is placed on the steel pad 11; the trolley frame 12 can be driven by a chain to move left and right, so as to realize the box girder. The movement of the beam; one end of the trolley frame 12 is connected with the pin-fixed support 16 through a pull rod 15, and the connection mode can be, for example, a pin or a bolt connection mode, and the other end of the trolley frame 12 is installed with an adjustable chain mounting seat 13; the trolley frame 12 A transfer device 14 is installed on the bottom surface, and the transfer device 14 can roll the platform frame 12 above it and the telescopic arm 2 below it through rollers; the pin fixing support 16 realizes the load beam by cooperating with the pin shaft. The trolley 1 moves or the telescopic arm 2 stretches; the adjustable chain mount 13 is used to connect the chain that drives the load beam trolley 1 or the telescopic arm 2 to move, and the chain is preferably a roller chain.

In order to further describe the adjustable chain mount 13 clearly, please refer to FIG. 9 , which shows a front view, a side view and a top view of the adjustable chain mount 13 . This adjustable chain mounting seat 13 is made up of screw rod 61, chain seat 62, chain baffle plate 63, chain pin shaft 64, chain base 65 and reinforcing rib plate 66, wherein, screw rod 61, chain baffle plate 63 are installed on the chain seat 62 And the chain pin shaft 64, the chain seat 62 is movably supported on the chain base 65, the screw rod 61 is screwed with the nut welded on the platform frame, the chain pin shaft 64 is connected with the chain of the drive system 5, and the chain base 65 supports the chain seat 62 to move thereon. The movement of the chain is driven by the chain pin shaft installed on the chain seat, so that the distance of the chain connection can be changed within a certain range, thereby realizing the adjustment.

Referring to FIG. 3 , the telescopic arm 2 is mainly composed of a screw assembly 21 , an end hinge support 22 , an end pad beam assembly 23 , a long arm 24 , a leg assembly 25 , a pole beam 26 and a block 27 . Wherein, the long arm 24 is mainly composed of a box-shaped structural beam and a bolt sleeve in the structural beam; one end of the screw assembly 21 is connected to the end pad beam assembly 23 through the end hinge support 22, and the other end can be connected with the threaded sleeve on the long arm 24. Screw together; one end of the outrigger assembly 25 is connected to the long arm 24, and the other end is connected to the pole beam 26; the stopper 27 is welded by two plates and a rib plate, and the stopper 27 is mainly used for limiting when the telescopic arm 2 is stretching , which can be set as required. When the telescopic arm 2 stretches to the bridge deck, use the screw assembly 21 to move relative to the threaded sleeve on the long arm 24, and under the support of the end hinge support 22 and the end pad beam assembly 23, the telescopic arm can be adjusted. 2 supports.

Referring to FIG. 10 , the outrigger assembly 25 is composed of a screw assembly 67 , a baffle 68 and a hinge seat 69 . Wherein, the ball head of the screw assembly 67 is installed between the baffle plate 68 and the hinge seat 69 connected by bolts; the hinge seat 69 can be used to support the telescopic arm 2; The screwing motion realizes the lifting of the hinge seat 69 thereon; thereby realizing the variable total length of the support leg assembly 25 . Therefore, after the shorter length is placed at the support point, the hinge seat 69 can be lifted by the screwing movement, thereby supporting the telescopic arm 2, so that the telescopic arm 2 can be walked on the telescopic arm 2 by the pack beam trolley 1 conveniently.

The pole beam 26 is made up of a supporting beam and a spiral sleeve arranged in the supporting beam. Mainly when the beam is taken from the beam carrier, the screw assembly 67 bears a lot of force, and the area of the screw assembly 67 is small, if it is directly supported on the bridge deck, it is easy to damage the bridge deck, while the supporting beam of the shoulder beam 26 It can increase the contact area with the bridge deck, thereby reducing the pressure.

Referring to Fig. 4, the crossbeam assembly 3 mainly consists of an upper reverse buckle support 31, a transporter assembly 32, a crossbeam 33, a bolt support 34, a variable-span oil cylinder assembly 35, a bolt 36, a guide support assembly 37, a lower Reverse buckle bearing 38 and following reverse buckle screw rod 39 form. Among them, the upper reverse buckle support 31, the transfer device assembly 32, the latch support 34, the latch 36 and the guide support assembly 37 are located on the upper surface of the beam 33; The support 38 and the lower buckle screw 39 are located on the lower surface of the crossbeam 33; the crossbeam 33 is placed on the gantry 4, and the relative sliding between the gantry 4 and the gantry 4 can be realized through the variable-span oil cylinder assembly 35, thereby completing different spans. The box girder has requirements for changing the center distance of the telescopic arm 2; the transfer device assembly 32 can make the telescopic arm 2 roll left and right on it to complete the telescopic operation.

The upper buckle support 31 is mainly able to prevent the telescopic arm 2 and the front and rear tilting of the telescopic arm 2 when it is telescopic; and control the maximum telescopic amount of the telescopic arm 2 by blocking the stopper 27 to control the center of gravity of the transfer platform The maximum distance from the support point to prevent the entire transfer platform from tipping back and forth.

Referring to FIG. 11 for the specific structure of the transfer device assembly 32 , the transfer device assembly 32 is composed of a roller transfer device 70 , a rubber pad 71 , an adjustment pad 72 , an installation base 73 and a connecting bolt 74 . Wherein, the roller transfer device 70 is installed on the rubber backing plate 71, utilizes the elasticity of the rubber backing plate 71 to carry out shock absorption, the rubber backing plate 71 is installed on the adjustment backing plate 72, and the adjustment backing plate 72 is installed on the mounting base 73, They are connected with each other by connecting bolts 74. When necessary, the adjustment backing plate 72 can also be removed to adjust the relative height. The transfer device assembly 32 mainly realizes the relative movement of the upper telescopic arm 2 and the lower beam 33. to scroll.

The variable-span oil cylinder assembly 35 is made of the variable-span oil cylinder lug 75, the variable-span oil cylinder 76, and the variable-span oil cylinder slide seat 77.

The variable-span oil cylinder ear seat 75 is welded to the side of the beam 33, the variable-span oil cylinder 76 is connected with the variable-span oil cylinder ear seat 75 and the variable-span oil cylinder slide seat 77 through pin connection, and the variable-span oil cylinder slide seat 77 is connected to the portal frame 4 through bolts. connect. And there are many groups of threaded holes on the upper cover plate of the portal frame 4. When changing the span, the sliding seat 77 of the variable span oil cylinder is connected with the portal frame 4 by the threaded holes on the upper cover plate of the bolt and the portal frame 4. The expansion and contraction of 76 drives the expansion and contraction of the variable span oil cylinder ear seat 75, thereby realizing the expansion and contraction of crossbeam 33.

Through the setting of the variable-span oil cylinder assembly 35, the transfer platform of the present invention can realize different variable-span processes. As we all know, it is impossible for all box girders to have the same size, and the length of the beams has different sizes such as 32m, 29m, and 24m. , and the transfer platform can adjust the distance of the beam assembly 3 through the span-changing process, so that beams of various lengths can be transferred at the same time.

Referring to Fig. 5, the portal frame 4 adopts a portal structure, and is composed of two box-shaped main beams 41, a plurality of supporting legs 42 and a plurality of connecting beams 43, and the connecting beam 43 connects the two main beams to improve the strength and ensure that the entire The stability of telescopic transfer operation process. Among them, the main beam 41 is divided into left main beam section and right main beam section for the convenience of transportation. The connecting part at the end of the section and the surface of the connecting plate are coated with inorganic zinc-rich paint after sandblasting, and are connected by 10.9 high-strength bolts way to realize the butt connection of two main girders. The outrigger 42 is connected with the main beam by bolts and welded with the embedded foundation, so as to ensure the stability of the operation process of the whole transfer platform.

Referring to Fig. 6, the driving system is composed of a driving device 51, a left guide wheel 52, a right guide wheel 53 and a roller chain 54, which are used to drive the telescopic arm 2 and the pack beam trolley 1 to expand and contract, and one end of the roller chain 54 passes through the pack beam trolley 1 The adjustable chain mounting seat 13 on the top is connected with the platform frame 12 of the pack beam trolley 1, passes through the driving device 51, the right guide wheel 53 and the left guide wheel 52 installed on the telescopic arm 2, and finally passes through the load beam trolley 1. The adjustable chain mount 13 is connected with the trolley frame 12 at the other end of the pack beam dolly 1 . Power is provided by the motor of the driving device 51, and the drive speed reducer drives the sprocket to rotate, thereby driving the roller chain 54, thereby driving the left and right movement of the pack beam trolley 1.

Referring to Fig. 7, the telescopic control device includes the pin fixing support 16 and the roller device 17 on the load beam trolley 1, the bolt 36 fixed on the beam 33 through the flange plate, the bolt support 34, the transfer device assembly 32 and the telescopic The latch sleeve on the arm 2 is composed. Through the different positions of the bolt 36 on the pin fixing support 16 and the bolt sleeve, the movement of the load beam trolley 1 or the telescopic arm 2 is realized. For example, when the bolt 36 is inserted on the pin fixing support 16 on the pack beam dolly 1 through the latch support 34, the pack beam dolly 1 and the crossbeam 33 remain fixed, then the drive system 5 can drive the telescopic arm 2 to expand and contract, and When the latch 36 is inserted into the latch sleeve on the telescopic arm 2 through the latch support 34, the telescopic arm 2 remains fixed relative to the beam 33, and the drive system 5 can drive the load beam trolley 1 to move and walk, thus, the telescopic control device can pass The latches 36 are at different positions of the pack beam trolley 1 and the telescopic arm 2, so as to drive the telescopic arm 2 to stretch or the pack beam trolley 1 to walk when different demands are required.

Fig. 8 has shown the schematic diagram of the beam-moving process of the present invention, as can be seen from Fig. 8, the beam-moving process of the transfer platform of the present invention is as follows:

a. The telescopic arm stretches to the outside of the bridge deck to get out of the way of the bridge deck passage; the girder truck carries the box girder to the transfer platform for alignment (see Figure 8A);

b. The telescopic arm is extended to the bridge deck, and the screw support is installed (see Figure 8B);

c. The carrying beam trolley walks to the position below the box girder, the beam transporting vehicle drops the beam, the box girder falls on the support of the carrying beam trolley, and the beam transporting vehicle unloads (see Figure 8C);

d, the beam trolley carries the box girder to the outside of the bridge deck (see Figure 8D);

e. Remove the screw support, stretch the telescopic arm to the outside of the bridge deck, and return the beam truck to the beam field to take the beam (see Figure 8E);

f. The transport-frame integrated bridge erecting machine runs without load to the alignment of the transfer platform;

g. The telescopic arm is stretched out to the bridge deck, and the screw support is installed;

h. The beam trolley carries the box girder to the bottom of the integrated bridge erecting machine (see Figure 8F for procedures f, g, and h);

i, transport frame integrated bridge erecting machine to lift the box girder (see Figure 8G);

j. The girder trolley runs to the outside of the bridge deck with no load, removes the screw support, moves the telescopic arm to the outside of the bridge deck, clears the bridge deck passage, and transports the integrated bridge erecting machine to the front girder (see Figure 8H).

The beam loading process carried out in the prefabricated beam field by using the transfer platform of the present invention comprises the following steps:

a. The beam lifting machine extracts the beam pieces from the prefabricated beam field and puts them on the transfer platform;

b. The integrated bridge erecting machine runs without load to the alignment of the transfer platform;

c. Extend the telescopic arm of the transfer platform to the bridge deck and install the screw support;

d. The beam trolley carries the box girder and moves to the lower part of the integrated bridge erecting machine;

e. The box girder is lifted by the integrated bridge erecting machine;

f. The beam trolley runs to the outside of the bridge deck with no load, removes the screw support, moves the telescopic arm to the outside of the bridge deck, clears the bridge deck passage, and transports the integrated bridge erecting machine to erect the girder.

Among them: when the telescopic arm stretches to the outside of the bridge deck or the girder lifting machine picks up the girder pieces from the prefabricated girder field, the transfer platform has completed the span-changing process according to the specifications of the box girder to be transferred. The span-changing process includes the following steps:

a. Stop the telescopic arm and the beam trolley when the center of gravity is at the center of the mast;

b. Loosen the four top tightening screw rods of the bottom buckle;

c. Change the position of the oil cylinder seat continuously until the span change operation is completed.

Through the above-mentioned beam loading process, before the integrated bridge erecting machine reaches the prefabricated beam yard, the beam lifting machine can extract the beam pieces from the prefabricated beam yard and put them on the transfer platform to prepare for beam loading. Therefore, time is further saved and efficiency is improved.

Claims (9)

1. A box girder transfer platform, wherein the platform comprises a pack beam dolly, a telescopic arm, a beam assembly, a portal frame, a drive system, a hydraulic system and an electrical system, and the pack beam dolly is installed on the telescopic arm, and the telescopic arm consists of The portal frame connected to the embedded foundation and the beam assembly supported on it, the driving device of the drive system is arranged at the rear end of the telescopic arm, the guide wheels of the drive system are arranged on the front and rear ends of the telescopic arm, the pump station of the hydraulic system Located on the main beam of the portal frame, the main cabinet of the electrical system is arranged on the main beam of the portal frame. 2. The transfer platform according to claim 1, characterized in that, the beam trolley is composed of a steel pad, a trolley frame, an adjustable chain mounting seat, a transfer device, a pull rod, a bolt fixing support and a roller device; wherein, The steel pad is fixed on the trolley frame, one end of the trolley frame is connected with the pin fixing support through a pull rod, the other end of the trolley frame is installed with an adjustable chain mounting seat, and the bottom of the trolley frame is equipped with a transfer device; among them, the adjustable chain mounting seat It consists of a chain base, a screw, a chain baffle, a chain pin shaft, a chain base and a stiffener plate; among them, the chain base is equipped with a screw rod, a chain pin shaft and a chain baffle, and the screw rod and the nut welded on the frame Mutually screwed, the chain pin shaft is connected with the chain of the drive system, and the chain base supports the chain base to move thereon. 3. The transfer platform according to claim 1, wherein the telescopic arm is composed of a screw assembly, an end hinge support, an end pad beam assembly, a long arm, an outrigger assembly, a pole beam and a block; wherein, the long The arm is composed of a box-shaped structural beam and a bolt sleeve in the structural beam. One end of the screw assembly is connected to the end pad beam assembly through the end hinge support, and the other end can be screwed with the threaded sleeve on the long arm; among them, the outrigger assembly It is composed of a screw assembly, a baffle and a hinge seat. The ball head of the screw assembly is installed between the baffle and the hinge seat connected by bolts. The shoulder beam is composed of a support beam and a spiral sleeve arranged in the support beam and screwed with the screw assembly. One end of the outrigger assembly is connected to the long arm, and the other end is connected to the pole beam. 4. The transfer platform according to claim 1, characterized in that, the beam assembly is composed of an upper buckle support, a transfer device assembly, a beam, a bolt support, a variable-span oil cylinder assembly, a bolt, and a guide support assembly It is composed of the upper reverse buckle support, the lower reverse buckle support and the lower reverse buckle screw; among them, the upper reverse buckle support, transfer device assembly, latch support, latch and guide support assembly are located on the upper surface of the beam, and the variable span oil cylinder assembly is located on the On the side of the crossbeam, the lower reverse buckle support and the lower reverse buckle screw are located on the lower surface of the crossbeam. 5. The transfer platform according to claim 1, further comprising a telescopic control device, the telescopic control device consists of a pin-fixed support and a roller device on the load beam trolley, a bolt fixed by a flange plate, and a bolt support It is composed of a transfer device assembly and a pin sleeve on the telescopic arm; under the control of the telescopic control device, the telescopic arm can be stretched under load. 6. The transfer platform according to claim 5, characterized in that, a set of driving mechanism can drive the expansion and contraction of the telescopic arm and the walking of the carrying beam trolley under the control of the telescopic control device; wherein the driving mechanism is composed of a driving device, a left guide wheel , the right guide wheel and the roller chain, one end of the roller chain is connected with the platform frame of the pack beam trolley through the adjustable chain mounting seat on the pack beam trolley, and passes through the driving device, the right guide wheel installed on the telescopic arm, the left The guide wheel is finally connected with the platform frame at the other end of the pack beam dolly by the adjustable chain mount at the other end on the pack beam dolly. 7. The transfer platform according to claim 1, characterized in that the box girder on the beam transport vehicle is removed and stretched to the outside of the bridge deck, and after the integrated bridge erecting machine for transporting the frame runs to the side of the transfer platform, it is integrated for transporting the frame from the side. The bridge erecting machine feeds the beam. 8. A beam-moving and beam-loading process of the transfer platform according to any one of claims 1-7, the beam-moving process comprising the following steps: a. The telescopic arm stretches to the outside of the bridge deck to get out of the way of the bridge deck; the girder truck carries the box girder to the transfer platform for alignment; b. The telescopic arm is extended to the bridge deck, and the screw support is installed; c. The carrying beam trolley walks to the position below the box girder, the beam transporting vehicle drops the beam, the box girder falls on the support of the carrying beam trolley, and the beam transporting vehicle unloads; d. The beam trolley carries the box girder to the outside of the bridge deck; e. Remove the screw support, stretch the telescopic arm to the outside of the bridge deck, and return the beam truck to the beam yard to take the beam; f. The transport-frame integrated bridge erecting machine runs without load to the alignment of the transfer platform; g. The telescopic arm is stretched out to the bridge deck, and the screw support is installed; h. The beam trolley carries the box girder to the bottom of the integrated bridge erecting machine; i. The box girder is lifted by the integrated bridge erecting machine; j. The beam trolley runs to the outside of the bridge deck with no load, removes the screw support, moves the telescopic arm to the outside of the bridge deck, clears the bridge deck passage, and transports the integrated bridge erecting machine to erect the girder. Its beam installation process includes the following steps: a. The beam lifting machine extracts the beam pieces from the prefabricated beam field and puts them on the transfer platform; b. The integrated bridge erecting machine runs without load to the alignment of the transfer platform; c. Extend the telescopic arm of the transfer platform to the bridge deck and install the screw support; d. The beam trolley carries the box girder and moves to the lower part of the integrated bridge erecting machine; e. The box girder is lifted by the integrated bridge erecting machine; f. The beam trolley runs to the outside of the bridge deck with no load, removes the screw support, moves the telescopic arm to the outside of the bridge deck, clears the bridge deck passage, and transports the integrated bridge erecting machine to erect the girder. 9. The beam-moving and beam-loading process of a transfer platform according to claim 8, characterized in that, when the telescopic arm stretches to the outside of the bridge deck or the girder lifting machine extracts the beam from the prefabricated beam field, the transfer platform according to the box to be transferred The specifications of the beams have completed the span-changing process, which includes the following steps: a. Stop the telescopic arm and the beam trolley when the center of gravity is at the center of the mast; b. Loosen the four top tightening screw rods of the bottom buckle; c. Change the position of the oil cylinder seat continuously until the span change operation is completed.

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