CN115418953A - A high-speed rail box girder support quick replacement device and box girder support quick replacement method - Google Patents

Abstract

The invention discloses a quick replacement device and a quick replacement method for a box girder support of a high-speed rail, which comprise a box girder support lifter and a cantilever crane, wherein a fixing mechanism for fixing a frame between a box girder and a pier is arranged on a main frame, a synchronous lifting mechanism is arranged on the main frame, a track structure for translating the box girder support is also arranged on the main frame, the track structure consists of a first track for guiding and a second track for supporting, a box girder support positioning assembly is also arranged on a translation vehicle, and when the lifting support plate is lifted to the maximum height, the box girder support is transferred from the lifting support plate to the translation vehicle through the box girder support fixing assembly. The beneficial effects of the invention are as follows: the problem of inconvenient narrow and small operation of construction space when having solved current case roof beam support and changing has realized promoting and removing the case roof beam support on the pier, has simplified the operation, has improved the security performance of operation.

Description

A high-speed rail box girder support quick replacement device and box girder support quick replacement method

technical field

The invention relates to the field of bridge construction technology, in particular to a device for quickly replacing a high-speed rail box girder support and a method for quickly replacing a box girder support.

Background technique

High-speed rail box girder supports are the most commonly used components in the construction of high-speed rail box girders. Taking box girders with standard lengths of 32m and 24m as examples, four types of supports are generally installed for each span: horizontal, vertical, fixed, and multi-directional. According to factors such as line type, geological conditions, vehicle speed, etc., each line will be equipped with supports of different load specifications. Taking the most commonly used TJQ-8360 series supports as an example, 4000-0.1g, 4500-0.1g, 5000 -0.1g, 5500-0.1g, 6000-0.1g and other supports, the size and weight of these supports are quite different. After being used for a certain period of time, the high-speed rail box girder bearings will be damaged, deformed, and components damaged due to factors such as construction factors, quality problems, climate and geology, and repeated sports cars, and they need to be replaced in time.

The main difficulties in the replacement of high-speed rail box girder bearings are as follows: 1. The construction space is narrow. Common bearings of 0.1g size have a height of 130mm-180mm, and the bottom surface of the beam is only 150mm-200mm away from the upper surface of the pad stone. The removal of old bearings and the installation of new bearings are very limited. The platform for personnel to stand is generally 1.8m-1.9m from the bottom of the beam, and the width of the platform is 0.8m-0.9m. Multiple and larger devices cannot be used in a small space. 2. The operation terrain is complex and the piers are high. The ground around the pier is uneven, difficult to access, and even affected by rivers, making it difficult to use large equipment on the ground; the pier height of the high-speed railway can reach 20m, and it is difficult to lift the support. 3. The support is heavy. The support used in the high-speed rail box girder has a maximum weight of 290kg at 4000-0.1g, a maximum weight of 393kg at 5000-0.1g, and a maximum weight of 435kg at 5500-0.g. The weight is heavy and difficult to lift. 4. The working time is short. Bridge maintenance on the existing high-speed railway line can only be carried out during the limited skylight time at night. It is necessary to complete the simultaneous lifting of the beam body, the removal of the old support, the installation of the new support, the return of the beam body, and the grouting of the support. Time is tight.

In the process of replacing the box girder bearings, due to the narrow construction space, complex terrain and high pier, and the heavy weight of the box girder bearings to be replaced, most of the existing operations are performed manually and the work efficiency is low. There is an urgent need for a device suitable for replacing box girder supports.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a quick replacement device for high-speed rail box girder supports and a quick replacement method for box girder supports.

The object of the present invention is achieved through the following technical solutions: a high-speed rail box girder support quick replacement device, including a box girder support lift and a cantilever crane, wherein the box girder support lift is composed of a main frame, a translation vehicle and a lifting pallet, wherein the main frame is composed of two main beams arranged in parallel, a front connecting beam connecting the front ends of the two main beams, and a tail connecting beam connecting the rear ends of the two main beams;

The main frame is provided with a fixing mechanism for fixing the frame between the box girder and the bridge pier. When the box girder support is replaced, the tightening screw is in close contact with the bottom surface of the girder body adjacent to the box girder to be replaced, the outrigger is in contact with the top surface of the pier, and the main girder exits the pier as a cantilever;

The main frame is provided with a synchronous lifting mechanism for lifting the box girder support, the synchronous lifting mechanism is installed on the main frame, and the movable end of the synchronous lifting mechanism is connected with the lifting pallet;

The main frame is also provided with a track structure for translating the box girder support. The track structure is composed of a first track for guiding and a second track for support. The translation vehicle is provided with an active walking mechanism and a driven traveling mechanism, the active traveling mechanism travels on the first track and drives the translation vehicle to translate, the driven traveling mechanism travels on the second track and supports the translation vehicle, The box girder support positioning component is also arranged on the translation vehicle, when the lifting pallet is lifted to the maximum height, the box girder support is moved from the lifting pallet to the vertical position through the box beam support fixing component. The transfer of the translation cart.

The number of said jacking screws is at least two and is symmetrically distributed on said tail connecting beam. The height of the legs can be adjusted and symmetrically distributed on the two main beams.

The synchronous lifting mechanism is composed of hoisting motor, linkage shaft, hoisting roller group, pulley block and lifting steel rope. There are four lifting points evenly distributed on the lifting pallet, and the linkage shaft is installed on two Between the main girders, the hoisting roller group is composed of hoisting rollers arranged at both ends of the linkage shaft, and the pulley group is composed of pulleys with the same number as the lifting points, wherein the hoisting points, hoisting rollers Corresponding to the positions of the pulleys one by one, one end of the hoisting steel rope is wound on the hoisting roller, the other end of the hoisting steel rope passes through the corresponding pulley and is connected to the corresponding lifting point, and the hoisting motor is driven in linkage axis.

The first track includes racks arranged on the inner sides of the two main beams, the second track is the upper surface of the two main beams, and the directions of the first track and the second track are consistent.

The translation car includes a fixed pallet, a movable pallet, a car body walking along a fixed track, a lifting mechanism for lifting the box girder support, and a walking mechanism for driving the car body to move. The car body consists of two The driving frame arranged in parallel and the base frame connecting the two driving frames and being fixed with the driving frame are composed of a base frame, and the lifting mechanism is composed of a front lifting cylinder group, a rear lifting cylinder group and a lifting cylinder The pumping station is composed of, the front lifting cylinder group includes lifting cylinders respectively installed at the front ends of the two driving frames, and the rear lifting cylinder group includes lifting cylinders respectively installed at the rear ends of the two driving frames, The lifting pump station simultaneously drives the front lifting cylinder group and the rear lifting cylinder group to perform synchronous actions, and the fixed supporting plate is fixed on the lifting cylinder of the rear lifting cylinder group and is lifted by the lifting cylinder Driven to lift, the movable supporting plate is movably installed on the lifting cylinder of the front lifting cylinder group and is driven by the oil cylinder to lift, and the walking mechanism is driven by the active walking mechanism that drives the vehicle body to move. It consists of a mechanism and a driven walking mechanism for assisting walking;

The active walking mechanism includes a drive shaft and a drive gear mounted on the drive shaft and driven by the drive shaft. A drive motor for driving the drive shaft to rotate is installed on the base frame. The drive gear is connected to the drive shaft. gear rack meshing;

The driven walking mechanism is composed of a plurality of supporting wheels installed on two traveling frames, and when the supporting wheels are in contact with the second track, the traveling frames are suspended, so the The supporting wheels can distribute the weight of the box girder support to the contact surface when supporting, so that the translation trolley is more stable when moving, and it serves the purpose of assisting walking.

The fixed supporting plate and the movable supporting plate constitute the positioning assembly of the box girder support.

The lifting pump station is installed on the base frame and connected with the lifting cylinders in the front lifting cylinder group and the rear lifting cylinder group respectively through oil passages. As a preference, the lifting pump station adopts a one-to-four mode, which can realize the synchronous action of the lifting cylinders of the front lifting cylinder group and the rear lifting cylinder group, and can also independently lift the front lifting cylinder group or the rear lifting cylinder group The lifting oil cylinders in the lifting cylinder group act synchronously, because the existing hydraulic pump station of the lifting pump station will not be repeated here.

The active running mechanism includes a transmission shaft and a drive gear mounted on the transmission shaft and driven by the transmission shaft. A driving motor for driving the transmission shaft is installed on the base frame. The vehicle body travels A rack matched with the transmission gear is arranged on the fixed rail. The driving motor drives the driving gear on the transmission shaft to rotate, and the translation trolley is promoted to translate according to a fixed track due to the engagement of the driving gear and the rack.

The number of the driving gears is two and they are installed symmetrically at both ends of the transmission shaft, and the distance between the two driving gears is not less than the distance between the two carriages. The driven traveling mechanism is composed of a plurality of supporting wheels installed on two carriage frames.

Preferably, the two supporting wheels are symmetrically distributed on the outer sides of the two driving frames, which is beneficial to improve the translational stability of the translation trolley when it moves. Preferably, the moving direction of the driven traveling mechanism is consistent with the moving direction of the driving traveling mechanism.

The lifting cylinders of the front lifting cylinder group installed at the front ends of the two driving frames are arranged in alignment, and the lifting cylinders of the rear lifting cylinder group installed at the rear ends of the two driving frames are arranged in alignment.

Both the fixed pallet and the movable pallet are provided with grooves for avoiding the upper and lower board connectors of the box girder support, and the box girder support is provided with an outer edge for lifting when lifting. When lifting, the fixed pallet and the movable pallet are clamped on the outer edge and play a supporting role on the box girder bearing.

The car body, fixed pallet, movable pallet, etc. are made of aluminum alloy, and the four lifting cylinders are lifted and lowered by an electric pump, and the trolley is driven by the motor reducer assembly. When the box girder seat rises, the trolley moves to the front end to avoid the support; when the box girder support reaches the highest position, the trolley moves, the fixed pallet enters under the support, and the movable pallet is manually installed. The lifting cylinder is raised to bear the weight of the support. Then the translation trolley sends the box girder support to the position of the stone pad, and the supporting oil cylinder slowly rises until the bolts at the bottom of the beam are tightened, and then the translation trolley exits to complete the replacement of the box beam support.

The cantilever crane includes a support frame main body, a swing arm and a lifting assembly, wherein the support frame main body includes a main support, an upper support assembly and a lower support assembly, and the upper end surface of the main support is provided with a first installation part, The lower end surface of the main bracket is provided with a second installation part, and the main bracket is also provided with a third installation part, and the upper support assembly is installed on the first installation part and when the box girder support is replaced In contact with the bottom surface of the box girder, the lower support assembly is installed on the second installation part and contacts the top surface of the pier when the box girder support is replaced, and the swing arm is rotatably installed on the third installation part , the swing arm is provided with a mounting frame that can translate along the swing arm, and the lifting assembly is mounted on the mounting frame.

The third installation part is located between the first installation part and the second installation part.

The main bracket is provided with a rotating shaft for installing the swing arm, and the upper and lower ends of the rotating shaft are provided with limiting parts, and the third installation part is composed of the rotating shaft and the limiting parts at the upper and lower ends. , one end of the swing arm is provided with a sleeve for installation on the rotating shaft. A bearing is arranged between the rotating shaft and the sleeve.

The upper support assembly is composed of a plurality of support arms installed on the first mounting part, and each of the support arms is provided with a fine-tuning top. The structure of the lower support assembly is similar to that of the upper support assembly, and will not be repeated here.

A kinematic pair for translation is provided between the installation frame and the swing arm. Preferably, the kinematic pair includes a slide rail arranged on the swing arm and a slider installed on the installation frame. There are many types of kinematic pairs, and any kinematic pairs that can realize translation are acceptable, so I won’t list them one by one here. The support arms are evenly distributed on the first installation part.

A method for quickly replacing a high-speed rail box girder bearing, comprising the following steps,

S1. Assembly of the cantilever crane: hoist the parts of the cantilever crane to the pier of the box girder support to be replaced and assemble the cantilever crane;

S2. Assembling of the box girder support lift: hoist the parts and hydraulic jacking parts of the box girder support lift to the bridge pier by a cantilever crane, assemble the box girder support lift, and the box girder support lift The top tightening screw of the box girder to be replaced is in close contact with the bottom surface of the adjacent girder body, the outrigger is in contact with the top surface of the pier, and the main girder exits the pier as a cantilever;

S3. Replacement of box girder supports, including removal of old box girder supports and installation of new box girder supports;

Among them, the removal of the old box girder support includes the following steps: move the translation trolley forward until the translation trolley is located under the box girder support, support the hydraulic jacking piece under the box girder to be replaced, and at the same time the lifting cylinder of the lifting mechanism stretches up until The positioning component of the box beam support on the translation trolley is in contact with the outer edge of the fixed box beam support, remove the fixing bolts on the box beam support, lift the box beam support by the translation trolley, and move the translation trolley backward until the translation trolley Located above the lifting pallet, the lifting cylinder of the lifting mechanism shrinks until the box girder support on the translation trolley is supported on the lifting pallet, remove the movable pallet, and the translation trolley continues to move backward until the fixed pallet is detached from the box beam support On the outer edge, the synchronous lifting mechanism drives the lifting pallet down to complete the removal of the old box girder support;

The installation of the new box girder support includes the following steps: install the new box girder support on the lifting pallet, the synchronous lifting mechanism drives the lifting pallet to rise, and the translation trolley moves forward until the fixed pallet is located below the outer edge of the box girder support. At the same time, the movable supporting plate is installed, the lifting cylinder of the lifting mechanism is stretched, the translation trolley bears the weight of the box girder support, the translation trolley continues to move forward until it moves to the bottom of the box beam, and the lifting cylinder of the lifting mechanism continues to stretch until the bottom of the beam is supported. After the seat bolts are tightened, the movable supporting plate is removed, and at the same time, the translation trolley is withdrawn to complete the installation of the new box girder support.

The beneficial effects of the present invention are as follows: (1) The frame of the translation trolley is provided with a fixed pallet and a movable pallet. When positioning the box girder support, the fixed pallet is used for preliminary positioning, and then the movable pallet is used for positioning. The supporting plate positions the box girder support according to the actual situation, and then lifts it through the lifting mechanism, and translates it through the translation trolley, which realizes the fixing and translation of the box girder base, reduces manual operations, and improves the operation efficiency. Safety performance; (2) The translation trolley is equipped with an active traveling mechanism and a driven traveling mechanism for assisting walking. During the translation, it is driven by the rack and pinion in the active traveling mechanism, and at the same time, it is driven by the supporting wheels of the driven traveling mechanism. The weight of the box girder support is distributed to the supporting surface, which makes the movement of the translation trolley more stable, and further improves the safety performance of the operation; (3), adopts the lifting mechanism of synchronous operation and cooperates with the movement of the trolley, in the fixed track Translational translation solves the problem of narrow construction space and inconvenient operation when replacing existing box girder supports, and can realize the movement of box girder supports on bridge piers, simplifying operations; (4) The upper and lower end faces of the main support of the cantilever crane The upper support assembly which is in contact with the bottom surface of the box girder and the lower support assembly which is in contact with the top surface of the bridge pier are provided, and the fine-tuning of the top is fine-tuned and fixed when the box girder support is replaced, and the entire cantilever crane can be positioned according to the specific box girder position At the same time, the pier and box girder are used as supports, and the lifting process is more stable when lifting related replacement parts; the swing arm of the cantilever crane is rotatably installed on the third installation part, and the angle of the swing arm can be determined according to the position of the pier and the platform. It is fixed, and then the relevant replacement parts are lifted, which is not limited to the structure of the box girder and the platform, and has a wider range of use; (5), the entire box girder support replacement process improves the lifting of the replacement parts of the box girder support The degree of mechanized operation reduces the dependence on manpower when lifting, carrying, and lifting heavy objects, improves operating efficiency, reduces the risk of high-altitude operations, reduces the difficulty of operating in small spaces and the resulting personal injury.

Description of drawings

Fig. 1 is the structural representation of box girder support elevator of the present invention;

Fig. 2 is the top view of the box girder support elevator of the present invention;

Fig. 3 is the side view of the box girder support elevator of the present invention;

Fig. 4 is the structural representation of translation car of the present invention;

Fig. 5 is the front view of translation car of the present invention;

Fig. 6 is the side view of translation car of the present invention;

Fig. 7 is the structural representation of cantilever crane of the present invention;

Fig. 8 is the front view of the cantilever crane of the present invention;

Fig. 9 is a side view of the cantilever crane of the present invention;

Fig. 10 is a top view of the cantilever crane of the present invention.

In the figure, 1. main frame, 2. translation vehicle, 3. lifting pallet, 4. cantilever crane, 101, main beam, 102, front connecting beam, 103, tail connecting beam, 104, jacking screw, 105 , support leg, 106, winch motor, 107, linkage shaft, 108, winch roller group, 109, pulley block, 110, hoisting steel rope, 111, first track, 112, second track, 113-rack, 2 -1, car body, 2-2, fixed pallet, 2-3, movable pallet, 2-4, lifting mechanism, 2-5, running mechanism, 2-6, groove, 2-101, driving frame , 2-102, base frame, 2-401, front lifting cylinder group, 2-402, rear lifting cylinder group, 2-403, lifting pump station, 2-404, lifting cylinder, 2-51, active Traveling mechanism, 2-52, driven traveling mechanism, 2-511, transmission shaft, 2-512, driving gear, 2-513, driving motor, 2-521, support wheel, 4-1, support frame main body, 4- 2. Swing arm, 4-3, lifting assembly, 4-101, main bracket, 4-102, upper support assembly, 4-103, lower support assembly, 4-104, first installation part, 4-105, second Installation part, 4-106, third installation part, 4-107, limit part, 4-108, support arm, 4-109, fine-tuning top, 4-201, mounting frame, 4-202, sleeve.

detailed description

The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

As shown in Figures 1-3, a high-speed rail box girder support quick replacement device includes a box girder support lift and a cantilever crane 4, wherein the box girder support lift consists of a main frame 1, a translation vehicle 2 and Lifting pallet 3 is composed, wherein, the main frame 1 is composed of two main beams 101 arranged in parallel, a front connecting beam 102 connecting the front ends of the two main beams 101 and a tail connecting the rear ends of the two main beams 101. Composed of beams 103;

The main frame 1 is provided with a fixing mechanism for fixing the frame 1 between the box girder and the bridge pier. The supporting legs 105 on the main girder 101 are formed. When the box girder support is replaced, the tightening screw 104 is in close contact with the bottom surface of the beam body adjacent to the box girder to be replaced, and the supporting legs 105 are in contact with the top surface of the pier. The main girder 101 outspends the pier as a cantilever;

The main frame 1 is provided with a synchronous lifting mechanism for lifting the box girder support, the synchronous lifting mechanism is installed on the main frame 1, and the movable end of the synchronous lifting mechanism is connected with the lifting pallet 3 It should be pointed out that the function of the lifting pallet 3 is to lift the box girder support, and the lifting pallet 3 is provided with prior art means such as lifting pins and limit blocks. It is enough to support the box girder support stably;

The main frame 1 is also provided with a track structure for translating the box girder support, the track structure is composed of a first track 111 for guiding and a second track 112 for supporting, and the translation vehicle 2 is set There are an active traveling mechanism 2-51 and a driven traveling mechanism 2-52, the active traveling mechanism 2-51 walks on the first track 111 and drives the translation vehicle 2 to perform translation, and the driven traveling mechanism 2 -52 walks on the second track 112 and supports the translation vehicle 2. The box beam support positioning assembly is also arranged on the translation vehicle 2. When the lifting pallet 3 is lifted to the maximum height, it passes through the The box girder support fixing assembly realizes the transfer of the box girder support from the lifting pallet 3 to the translation vehicle 2 .

There are at least two tightening screws 104 symmetrically distributed on the tail connecting beam 103 .

The heights of the legs 105 are adjustable and symmetrically distributed on the two main beams 101 .

Preferably, the synchronous lifting mechanism is composed of hoisting motor 106, linkage shaft 107, hoisting roller group 108, pulley group 109 and lifting steel rope 110, and there are four lifting points evenly distributed on the lifting pallet 3 , the linkage shaft 107 is installed between the two main beams 101, the hoisting roller set 108 is composed of hoisting rollers arranged at both ends of the linkage shaft 107, and the pulley set 109 is composed of consist of consistent pulleys, wherein the lifting point, hoisting roller and the position of the pulley correspond one by one, one end of the hoisting steel rope 110 is wound on the hoisting roller, and the other end of the hoisting steel rope 110 passes through The corresponding pulley is connected with the corresponding lifting point. The hoisting motor 106 drives the linkage shaft 107. The hoisting motor 106 is installed on the main frame 1 through a bracket. Preferably, the hoisting motor 106 is installed on any main beam 101 . Each hoisting point can be hoisted with a separate hoisting roller, or the hoisting point on the same side can be hoisted with the same hoisting roller (the hoisting roller is set with a baffle to divide the hoisting area into two parts). a working area that does not interfere with each other), similarly, the drive of the winch roller can be driven by the same shaft, or it can be driven by different motors, as long as the synchronous action is satisfied, because there are many ways to realize synchronous drive. , this application does not enumerate them one by one.

The first track 111 includes racks 113 arranged on the inner sides of the two main beams 101, the second track 112 is the upper surface of the two main beams 101, the first track 111 and the second The directions of the two tracks 112 are consistent.

As shown in Figures 4-6, the translation vehicle 2 includes a fixed pallet 2-2, a movable pallet 2-3, a car body 2-1 that walks along a fixed track, and a bracket for lifting the box girder support. The lifting mechanism 2-4 and the traveling mechanism 2-5 for driving the movement of the vehicle body 2-1, the vehicle body 2-1 is composed of two parallel arranged driving frames 2-101 and two driving frames 2-101 connected to each other. 101 and the base frame 2-102 fixed integrally with the driving frame 2-101 is composed, and the lifting mechanism 2-4 is composed of a front lifting cylinder group 2-401, a rear lifting cylinder group 2-402 and Lifting pump station 2-403, the front lifting cylinder group 2-401 includes lifting cylinders respectively installed on the front ends of the two driving frames 2-101, and the rear lifting cylinder group 2-402 includes lifting cylinders respectively The lift cylinders installed at the rear ends of the two driving frames 2-101, the lift pump station 2-403 simultaneously drives the front lift cylinder group 2-401 and the rear lift cylinder group 2-402 to perform synchronous actions, so The fixed supporting plate 2-2 is fixed on the lifting cylinder of the rear lifting cylinder group 2-402 and is driven by the lifting cylinder to lift, and the movable supporting plate 2-3 is movably installed on the lifting cylinder. The lifting oil cylinder of the aforementioned front lifting oil cylinder group 2-401 is driven by the oil cylinder to carry out lifting, and the walking mechanism 2-5 is composed of the active walking mechanism 2-51 that drives the vehicle body 2-1 to move and uses Composed of driven walking mechanism 2-52 for assisting walking;

The active walking mechanism 2-51 includes a transmission shaft 2-511 and a drive gear 2-512 mounted on the transmission shaft 2-511 and driven by the transmission shaft 2-511. The base frame 2-102 A driving motor 2-513 for driving the transmission shaft 2-511 to rotate is installed on the top, and the driving gear 2-512 is meshed with the rack 113;

The driven walking mechanism 2-52 is composed of a plurality of support wheels 2-521 installed on the two carriages 2-101, and the support wheels 2-521 are in contact with the second track 2-112 , the traveling frame 2-101 is suspended;

The fixed supporting plate 2-2 and the movable supporting plate 2-3 form a box girder support positioning assembly.

The lifting pump station 2-403 is installed on the base frame 2-102 and is connected to the lifting cylinders in the front lifting cylinder group 2-401 and the rear lifting cylinder group 2-402 respectively through oil passages. The lifting cylinder adopts CX-SD hydraulic thin cylinder, its stroke can reach 50mm, and the maximum lifting force of a single cylinder can reach 200kg.

The number of the driving gears 2-512 is two and they are symmetrically installed on both ends of the transmission shaft 2-511, and the distance between the two driving gears 2-512 is not less than that between the two carriages 2-101 distance.

The two supporting wheels 2-521 are symmetrically distributed on the outer sides of the two driving frames 2-101. The supporting wheels 2-521 are made of high-strength bearing steel, which can effectively support, evenly distribute the weight of the box girder base to the supporting surface, and make the movement of the translation trolley more stable.

The front lifting cylinder group 2-401 is arranged in alignment with the lifting cylinders installed on the front ends of the two driving frames 2-101, and the rear lifting cylinder group 2-402 is installed on the two driving frames 2 The lift cylinders at the rear end of -101 are arranged in alignment.

Both the fixed pallet 2-2 and the movable pallet 2-3 are provided with grooves 2-6 for avoiding the upper and lower board connectors of the box girder support. According to the existing data and statistics, the maximum size of the 0.1g box girder support is A880, B650, C660, D660, H165; the maximum weight is 481kg. Therefore, in this application, it is only necessary to change the movable pallet and the fixed pallet to meet the requirements of use, which further increases the scope of application of the present application and can meet box girder supports of different models and specifications. For the 0.1g box girder support, the size of the translation trolley in this application can be 1.24m in length, 1.076m in width, and 169mm in height (when not lifted), and the weight of the whole machine is less than 160kg (the main frame : 70kg, translation trolley: 45kg; pallet 40kg) can meet the conditions of use, and the production is very convenient. When lifting, the translation trolley moves forward (inside the pier), the fixed pallet enters under the support, and the movable pallet is manually installed. Then raise the lifting oil cylinder so that the gap between the upper surface of the box girder support and the bottom surface of the beam is 20mm, the weight of the box girder support is transferred to the translation trolley, and then the translation trolley moves forward according to the fixed track, and the box girder support is sent into the The position of the pad stone under the pier is sufficient.

As shown in Figures 7-10, the cantilever crane 4 includes a support frame main body 4-1, a swing arm 4-2 and a lifting assembly 4-3 (hoisting machine), wherein the support frame main body 4-1 includes The main support 4-101, the upper support assembly 4-102 and the lower support assembly 4-103, the upper end surface of the main support 4-101 is provided with a first installation part 4-104, the lower end surface of the main support 4-101 A second installation part 4-105 is provided, and a third installation part 4-106 is also provided on the main bracket 4-101. The upper support assembly 102 is installed on the first installation part 4-104 and When the box girder support is replaced, it is in contact with the bottom surface of the box girder. The lower support assembly 4-103 is installed on the second installation part 4-105 and is in contact with the top surface of the pier when the box girder support is replaced. The swing arm 4-2 is rotatably mounted on the third installation part 4-106, and the swing arm 4-2 is provided with a mounting bracket 4-201 (the swing arm 4-2 A limiting plate is provided at the end of the stroke to prevent the mounting frame 4-201 from exceeding the limit stroke position), and the lifting assembly 4-3 is installed on the mounting frame 4-201.

The third installation part 4-106 is located between the first installation part 4-104 and the second installation part 4-105.

The main bracket 4-101 is provided with a rotating shaft for installing the swing arm 4-2, and the upper and lower ends of the rotating shaft are provided with limiting parts 4-107, and the third mounting part 4-106 is formed by The rotating shaft and its upper and lower limit portions 4-107 are composed, and one end of the swing arm 4-2 is provided with a sleeve 4-202 for being installed on the rotating shaft.

A bearing is arranged between the rotating shaft and the sleeve 4-202.

The upper support assembly 4-102 is composed of a plurality of support arms 4-108 installed on the first mounting part 4-104, each of the support arms 4-108 is provided with a fine-tuning top 4-4 -109. Preferably, the upper support assembly 102 is arranged in a three-point positioning manner, that is, the upper support assembly 4-102 consists of three support arms 4-108 evenly distributed on the first mounting part 4-104. composition. The fine-tuning top 4-109 can adopt manual fine-tuning or electric fine-tuning. The structure of manual fine-tuning is relatively common. For example, if a threaded top is used, the corresponding surface is fixed by moving up and down the thread. The electric fine-tuning can be done by electric /pneumatic support cylinder to realize, this means is prior art.

A kinematic pair for translation is arranged between the installation frame 4-201 and the swing arm 4-2.

The support arms 4-108 are evenly distributed on the first mounting portion 4-104.

When lifting the box girder support to replace parts, first fix the main body 1 of the support frame between the box girder and the pier of the support to be replaced (specifically, for a pier of a common structure, the main body 4-1 of the support frame is installed on the pier platform For some non-standard piers, the installation position should be selected according to the actual situation, for example, due to the narrow operating space, there are many types of replacement parts and they are placed on both sides of the pier, and the position of the swing arm needs to be adjusted), and then Adjust the position of the swing arm and fix it, and move the lifting component 4-3 (hoist) to carry out the lifting operation. It should be noted that the rotation of the swing arm and the translation of the lifting component 4-3 (hoist) can be controlled by the motor. Locking (for example, the swing is driven by the rotating motor, and the locking can be performed when the rotation reaches a suitable angle, and the translation of the lifting component 4-3 can be driven by the motor), but in the actual process, the on-site technicians cannot To achieve electric locking, a manual locking method will also be used, such as the swing arm rotation/lifting assembly 4-3 is translated to a certain angle and locked by a fixing piece (common thread locking). This means is a prior art and will not be described in detail. Preferably, the support frame main body 4-1 and the swing arm of the jib crane are made of steel.

A method for quickly replacing a high-speed rail box girder bearing, comprising the following steps,

S1, assembly of the cantilever crane 4: hang the parts of the cantilever crane 4 on the pier of the box girder support to be replaced and assemble the cantilever crane 4;

S2. Assembling of the box girder support lift: hoist the parts and hydraulic jacking parts of the box girder support lift to the pier by the cantilever crane 4, assemble the box girder support lift, and the box girder support The jacking screw 104 of the elevator is in close contact with the bottom surface of the girder body adjacent to the box girder to be replaced, the outrigger 105 is in contact with the top surface of the pier, and the main girder 101 exits the pier as a cantilever;

S3. Replacement of box girder supports, including removal of old box girder supports and installation of new box girder supports;

Among them, the removal of the old box girder support includes the following steps: move the translation trolley 2 forward until the translation trolley 2 is located under the box girder support, support the hydraulic jacking part under the box girder to be replaced while supporting the supporting mechanism 2-4 The oil cylinder is stretched and raised until the positioning component of the box beam support on the translation trolley 2 contacts the outer edge of the fixed box beam support, and the fixing bolts on the box beam support are removed, and the box beam support is lifted by the translation trolley 2. The translation trolley 2 moves backward until the translation trolley 2 is above the lifting pallet 3, the lifting cylinder of the lifting mechanism 2-4 shrinks until the box beam support on the translation trolley 2 is supported on the lifting pallet 3, and the movable pallet is removed 2-3, the translation trolley 2 continues to move backward until the fixed supporting plate 2-2 breaks away from the outer edge of the box girder support, and the synchronous lifting mechanism drives the lifting support plate 3 down to complete the removal of the old box girder support;

The installation of the new box girder support includes the following steps: Install the new box girder support on the lifting pallet 3, and the synchronous lifting mechanism drives the lifting pallet 3 to rise (up to the gap between the upper surface of the box girder support and the bottom surface of the beam 20-30mm) ), the translation trolley 2 moves forward until the fixed pallet 2-2 is located below the outer edge of the box girder support, and the movable pallet 2-3 is installed at the same time, the lifting cylinder of the lifting mechanism 2-4 is extended, and the translation trolley 2 bears The weight of the box girder support, the translation trolley 2 continues to move forward until it moves to the bottom of the box girder, the lifting cylinder of the lifting mechanism 2-4 continues to stretch until the bolts of the bottom support of the beam are tightened, and the movable supporting plate 2-3 is removed , and at the same time, the translation trolley 2 exits to complete the installation of the new box girder support.

One according to the present invention has been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that for the above-mentioned one proposed by the present invention, various improvements can be made without departing from the content of the present invention, or equivalent replacements can be made to some of the technical features. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the contents of the appended claims.

Claims (10)

1. A high-speed rail box girder support quick replacement device, characterized in that it includes a box girder support lift and a cantilever crane (4), wherein the box girder support lift consists of a main frame (1), a translation vehicle ( 2) and a lifting pallet (3), wherein the main frame (1) consists of two main beams (101) arranged in parallel, and a front connecting beam (102) connecting the front ends of the two main beams (101). ) and a tail connecting beam (103) connecting the rear ends of the two main beams (101); The main frame (1) is provided with a fixing mechanism for fixing the frame (1) between the box girder and the pier. The screw (104) and the outriggers (105) installed on the two main girders (101) are composed. When the box girder support is replaced, the tightening screw (104) is closely connected to the bottom surface of the beam adjacent to the box girder to be replaced. contact, the outrigger (105) is in contact with the top surface of the pier, and the main girder (101) protrudes from the pier as a cantilever; The main frame (1) is provided with a synchronous lifting mechanism for lifting the box girder support, the synchronous lifting mechanism is installed on the main frame (1), and the movable end of the synchronous lifting mechanism is connected with the lifting The pallet (3) is connected; The main frame (1) is also provided with a track structure for translating the box girder support, and the track structure is composed of a first track (111) for guiding and a second track (112) for supporting, The translation vehicle (2) is provided with an active traveling mechanism (2-51) and a driven traveling mechanism (2-52), and the active traveling mechanism (2-51) travels on the first track (111) and Drive the translation vehicle (2) to perform translation, the driven traveling mechanism (2-52) walks on the second track (112) and supports the translation vehicle (2), the translation vehicle (2 ) is also provided with a box girder support positioning component. When the lifting pallet (3) is lifted to the maximum height, the box girder support can be moved from the lifting pallet (3) through the box girder support fixing component. 3) Transfer to the translation car (2). 2. The high-speed rail box girder support replacement device according to claim 1, characterized in that, the number of the tightening screws (104) is at least two and symmetrically distributed on the tail connecting beam (103) superior. 3. The high-speed rail box girder support replacement device according to claim 1, characterized in that, the height of the legs (105) is adjustable and symmetrically distributed on the two main beams (101). 4. A high-speed rail box girder support replacement device according to claim 1, characterized in that, the synchronous lifting mechanism consists of a hoisting motor (106), a linkage shaft (107), and a hoisting roller group (108) , a pulley block (109) and a lifting steel rope (110), four lifting points are evenly distributed on the lifting pallet (3), and the linkage shaft (107) is installed on the two main beams (101) Among them, the hoisting roller group (108) is composed of hoisting rollers arranged at both ends of the linkage shaft (107), and the pulley group (109) is composed of pulleys with the same number of lifting points, wherein the The hoisting point, hoisting roller and the position of the pulley correspond one by one, one end of the hoisting steel rope (110) is wound on the hoisting roller, the other end of the hoisting steel rope (110) passes through the corresponding pulley and Linked to the corresponding lifting point, the winch motor (106) drives the linkage shaft (107). 5. A high-speed rail box girder support replacement device according to claim 1, characterized in that, the first track (111) includes racks (113) arranged on the inner sides of the two main beams (101) ), the second track (112) is the upper surface of the two main beams (101), and the directions of the first track (111) and the second track (112) are consistent. 6. A high-speed rail box girder support replacement device according to claim 5, characterized in that, the translation vehicle (2) includes a fixed pallet (2-2), a movable pallet (2-3), along The vehicle body (2-1) running on the fixed track, the lifting mechanism (2-4) used to lift the box girder support, and the running mechanism (2-5) used to drive the vehicle body (2-1) to move, The vehicle body (2-1) is composed of two traveling frames (2-101) arranged in parallel, and the two traveling frames (2-101) are connected and fixed together with the traveling frames (2-101) The base frame (2-102) consists of the lifting mechanism (2-4) consisting of the front lifting cylinder group (2-401), the rear lifting cylinder group (2-402) and the lifting pump station (2 -403), the front lifting cylinder group (2-401) includes lifting cylinders respectively installed at the front ends of the two driving frames (2-101), and the rear lifting cylinder group (2-402) It includes lifting cylinders respectively installed at the rear ends of the two driving frames (2-101), and the lifting pump station (2-403) simultaneously drives the front lifting cylinder group (2-401) and the rear lifting cylinder group (2-402) perform synchronous actions, the fixed support plate (2-2) is fixed on the lifting cylinder of the rear lifting cylinder group (2-402) and is driven by the lifting cylinder to lift , the movable supporting plate (2-3) is movably installed on the lifting cylinder of the front lifting cylinder group (2-401) and is driven by the lifting cylinder, and the traveling mechanism (2-5 ) consists of an active traveling mechanism (2-51) driving the vehicle body (2-1) to move and a driven traveling mechanism (2-52) for assisting walking; The active walking mechanism (2-51) includes a transmission shaft (2-511) and a drive gear (2-512) mounted on the transmission shaft (2-511) and driven by the transmission shaft (2-511). ), the base frame (2-102) is equipped with a driving motor (2-513) for driving the transmission shaft (2-511) to rotate, the driving gear (2-512) and the rack (113 ) meshing; The driven traveling mechanism (2-52) is composed of a plurality of support wheels (2-521) installed on two carriage frames (2-101), and the support wheels (2-521) are in contact with the When the second track (2-112) is in contact, the traveling frame (2-101) is suspended; The fixed supporting plate (2-2) and the movable supporting plate (2-3) constitute a box girder support positioning assembly. 7. A high-speed rail box girder support replacement device according to claim 6, characterized in that, the lifting pump station (2-403) is installed on the base frame (2-102) and passes oil The roads are respectively connected with the lifting cylinders in the front lifting cylinder group (2-401) and the rear lifting cylinder group (2-402); the number of the driving gears (2-512) is two and symmetrically installed on At both ends of the drive shaft (2-511), the distance between the two drive gears (2-512) is no less than the distance between the two carriages (2-101); the two support wheels (2-101) -521) symmetrically distributed on the outer sides of the two driving frames (2-101); The oil cylinders are aligned and arranged, and the lifting oil cylinders of the rear lifting cylinder group (2-402) installed on the rear ends of the two driving frames (2-101) are aligned and arranged. 8. A high-speed rail box girder support replacement device according to claim 1, characterized in that, the cantilever crane (4) includes a support frame main body (4-1), a swing arm (4-2) and Lifting assembly (4-3), wherein the support frame main body (4-1) includes a main support (4-101), an upper support assembly (4-102) and a lower support assembly (4-103), the main The upper end surface of the bracket (4-101) is provided with a first installation part (4-104), the lower end surface of the main bracket (4-101) is provided with a second installation part (4-105), and the main bracket ( 4-101) is also provided with a third installation part (4-106), the upper support assembly (4-102) is installed on the first installation part (4-104) and replaced on the box girder support contact with the bottom surface of the box girder, the lower support assembly (4-103) is installed on the second installation part (4-105) and contacts the top surface of the pier when the box girder support is replaced, and the pendulum The arm (4-2) is rotatably mounted on the third mounting part (4-106), and the swing arm (4-2) is provided with a mounting bracket (4) that can translate along the swing arm (4-2). -201), the lifting assembly (4-3) is installed on the mounting frame (4-201). 9. The high-speed rail box girder support replacement device according to claim 8, characterized in that, the third installation part (4-106) is located at the first installation part (4-104) Between the two mounting parts (4-105); the main bracket (4-101) is provided with a rotating shaft for installing the swing arm (4-2), and the upper and lower ends of the rotating shaft are provided with limit stops part (4-107), the third mounting part (4-106) is composed of the rotating shaft and the limit parts (4-107) at its upper and lower ends, and one end of the swing arm (4-2) A sleeve (4-202) for being installed on the rotating shaft is provided; the upper support assembly (4-102) consists of a plurality of support arms ( 4-108), each of the support arms (4-108) is provided with a fine-tuning top (4-109). 10. A method for quickly replacing a high-speed rail box girder bearing, characterized in that it comprises the following steps, S1. Assembly of the cantilever crane (4): hoist the parts of the cantilever crane (4) onto the pier of the box girder support to be replaced and assemble the cantilever crane (4); S2. Assembling of the box girder support lift: hoist the parts and hydraulic jacking parts of the box girder support lift to the bridge pier by the cantilever crane (4), and assemble the box girder support lift. The jacking screw (104) of the support lift is in close contact with the bottom surface of the girder body adjacent to the box girder to be replaced, the outrigger (105) is in contact with the top surface of the pier, and the main girder (101) extends out of the pier as a cantilever; S3. Replacement of box girder supports, including removal of old box girder supports and installation of new box girder supports; Among them, the removal of the old box girder support includes the following steps: move the translation trolley (2) forward until the translation trolley (2) is located under the box girder support, and support the hydraulic jacking part under the box girder to be replaced while lifting the mechanism ( 2-4) The lifting cylinder extends and rises until the positioning component of the box beam support on the translation trolley (2) contacts the outer edge of the fixed box beam support, removes the fixing bolts on the box beam support, and passes the translation trolley (2) ) Lift the box girder support, move the translation trolley (2) backward until the translation trolley (2) is above the lifting pallet (3), and the lifting cylinder of the lifting mechanism (2-4) shrinks until the translation trolley (2 ) is supported on the lifting pallet (3), the movable pallet (2-3) is removed, and the translation trolley (2) continues to move backward until the fixed pallet (2-2) is detached from the box beam support On the outer edge, the synchronous lifting mechanism drives the lifting pallet (3) down to complete the removal of the old box girder support; The installation of the new box girder support includes the following steps: Install the new box girder support on the lifting pallet (3), the synchronous lifting mechanism drives the lifting pallet (3) up, and the translation trolley (2) moves forward until the pallet is fixed (2-2) is located below the outer edge of the box girder support, and the movable pallet (2-3) is installed at the same time, the lifting cylinder of the lifting mechanism (2-4) is extended, and the translation trolley (2) bears the weight of the box girder support , the translation trolley (2) continues to move forward until it moves to the bottom of the box girder, and the lifting cylinder of the lifting mechanism (2-4) continues to extend until the bolts of the bottom support of the beam are tightened, then remove the movable supporting plate (2-3 ), and at the same time move the trolley (2) out to complete the installation of the new box girder support.

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