CN111395199B - Pushing machine for bridge construction - Google Patents
Pushing machine for bridge construction Download PDFInfo
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- CN111395199B CN111395199B CN202010053421.6A CN202010053421A CN111395199B CN 111395199 B CN111395199 B CN 111395199B CN 202010053421 A CN202010053421 A CN 202010053421A CN 111395199 B CN111395199 B CN 111395199B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
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Abstract
The invention discloses a pusher for bridge construction, which belongs to the field of bridge construction and comprises a shell, a jacking oil cylinder and a pushing platform, wherein a gear transmission mechanism for pushing the pushing platform to move horizontally is arranged in the shell; gear drive includes carry gear and backset gear, the carry gear with the backset gear is the gear that lacks the tooth, it is equipped with the rack to push away a lower part side, when carry gear and rack meshing, push away a carry, when backset gear and rack meshing, push away a backset, consequently, carry gear and backset gear need not the diversion to avoided because the impact that the driving system diversion brought, not only make the driving system more durable, still make the pusher can adapt to the top of faster speed, solved prior art, because driving system need constantly turn, lead to prolonging the diversion time, lead to pushing the problem of inefficiency.
Description
Technical Field
The invention relates to bridge construction equipment, in particular to a pusher for bridge construction.
Background
At present, the erection of highway and railway bridges is mostly realized by adopting a jacking method, wherein the jacking method is to jack up a steel box girder forming a bridge main body by a plurality of thrusters and then gradually push the steel box girder forward, and the thrusters push a small amount each time; the size of the pusher cannot be too large because the pusher needs to be placed on the temporary pier to provide the height required for pushing; the stroke of the existing thrustor is generally 200mm-500mm, which means that a very large number of times of back-and-forth thrusting is required to complete the thrusting of a bridge, in the back-and-forth thrusting process, the thrustor needs to continuously change the thrust direction, and in the turning process of a power system for controlling the back-and-forth thrusting of the thrustor, due to the instantaneous change of the motion direction, a very large impact is brought, especially in the bridge thrusting, because the weight of a steel box girder is very large, the generated impact is also very large, in order to avoid the damage caused by the impact, the reversing time needs to be prolonged, so that in the actual thrusting scheme, the thrusting speed is about 2.5-6m/h, and the time for completing the thrusting of the bridge needs to be very long, so that the efficiency for improving the bridge thrusting is particularly important.
For example, the "bridge thruster" disclosed in the chinese patent literature, which is published under the publication number CN201821348514.6, includes a base and a thruster cylinder, and has disadvantages that a power system (the thruster cylinder) needs to change direction continuously in the process of controlling the thruster to push the bridge assembly, and in order to avoid damage to the power system caused by impact, the reversing time of the cylinder needs to be prolonged, so that the whole thruster process needs longer time, and the thruster efficiency is seriously affected.
Disclosure of Invention
The invention provides a thruster for bridge construction, aiming at overcoming the problems that in the process of thrusting a bridge component in the prior art, as a thruster needs to return at a backward position for pushing the bridge component, the pushing direction of the thruster needs to be changed continuously, so that a power mechanism of the thruster needs to be changed continuously, and larger impact can be generated, and the power mechanism is damaged, the power mechanism of the thruster can complete the carry and the return of a jacking table without changing direction repeatedly, so that the impact caused by changing direction is avoided, the thruster can adapt to higher thrusting speed, and the thrusting efficiency is greatly improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a thruster for bridge construction, which comprises a shell, wherein a jacking oil cylinder is arranged at the bottom of the shell, a jacking platform for jacking and pushing a bridge construction assembly is arranged on the shell, and a gear transmission mechanism for pushing the jacking platform to move horizontally is arranged in the shell; the gear transmission mechanism comprises a plurality of output gears, a rack is arranged on the side face of the lower portion of the pushing platform, the output gears comprise a carry gear used for controlling the pushing platform to carry and a return gear used for controlling the return of the pushing platform, and the carry gear and the return gear are both tooth-lacking gears.
The pushing machine uses a gear transmission mechanism to replace a hydraulic cylinder in the prior art to provide power for pushing the pushing platform; if the combination of the gear and the rack is simply used for controlling the movement of the pushing platform, when the pushing platform changes the direction, the gear also needs to change the rotation direction of the pushing platform, and mechanical impact can still be generated on a power system; in the scheme, because the carry gear and the retreat gear for outputting are both gear with missing teeth, in the process of continuous rotation of the gear, only the part with teeth faces the rack, effective output can be achieved, and when the part with missing teeth faces the rack, the gear cannot achieve the actual output effect; when the carry gear is in meshing transmission with the carry rack, the tooth-lacking part of the back gear faces the rack, and when the back gear is in meshing transmission with the back rack, the tooth-lacking part of the carry gear faces the rack; because the carry gear is only responsible for carrying of the pushing table and the backing gear is only responsible for backing of the pushing table, the two gears only need to rotate towards one direction without changing directions; therefore, impact caused by direction change of the power system is avoided, the power system is more durable, and the pushing machine can adapt to pushing at a higher speed.
Preferably, two sides of the lower part of the pushing table are both provided with racks, wherein the rack on one side is a carry rack, the rack on the other side is a retreat rack, an output gear meshed with the carry rack is a carry gear, the output gear meshed with the retreat rack is a retreat gear, a shaft driving the carry gear and the retreat gear to rotate is a transmission shaft, the transmission shaft is provided with a transmission gear rotating synchronously with the carry gear or the retreat gear on the shaft, an input gear is further arranged in the shell, and the input gear is meshed with the transmission gear; because carry gear and retreat gear are located the both sides of pushing away the platform lower part respectively, consequently, carry gear and retreat gear's direction of rotation is the same, for example: if the right direction is the carry direction of the pushing table and the left direction is the retreat direction of the pushing table, the output gear positioned on the front side of the lower part of the pushing table is a carry gear, and the output gear positioned on the rear side of the lower part of the pushing table is an retreat gear, the rotation directions of the carry gear and the retreat gear are both clockwise directions; and all output gears can synchronously rotate through the input gear and the transmission gear, only one motor is needed to drive all output gears, the equipment cost is reduced, and the condition that all input motors are blocked due to the fact that one gear is blocked or other gears continue to rotate when the input motor of one gear goes wrong can be avoided.
Preferably, the racks on the two sides of the lower part of the pushing table are also connected with driven gears in a meshed manner; in the scheme, the carry gear and the retreat gear are respectively positioned at two sides of the lower part of the pushing platform; therefore, when the pushing platform carries, only one side of the carrying rack on the lower part of the pushing platform is stressed, and when the pushing platform moves back, only one side of the moving rack on the lower part of the pushing platform is stressed, so that the lower part of the pushing platform can be deviated to the unstressed side; the driven gear can limit the lower part of the pushing platform transversely, so that two sides of the lower part of the pushing platform are always stressed and cannot deviate.
Preferably, an in-place detection assembly is further arranged in the shell and comprises a sensor for detecting the limit positions of two ends of the pushing table in the direction pushed by the gear transmission mechanism, when one end of the pushing table is detected by the sensor, the jacking oil cylinder is controlled to lift upwards through a hydraulic control system, when the other end of the pushing table is detected by the sensor, the jacking oil cylinder is controlled to return downwards through the hydraulic control system; the sensor can detect the limit positions of two ends of the lower part of the jacking table, when the jacking table moves to the limit position of carry, the sensor sends a signal to the control system to control the jacking oil cylinder to descend and return, when the jacking table moves to the limit position of retreat, the sensor sends a signal to the control system to control the jacking oil cylinder to ascend and jack up the bridge assembly, so that the situation that the jacking oil cylinder descends in advance when the carry of the jacking table is not finished can be prevented, and the distance of single carry is smaller than the expected distance; compare in prior art through the scheme that adds buffering time between carry step and jacking step, this scheme can need not buffering time, further improves the efficiency that pushes up.
Preferably, supports are arranged on two sides of the shell, the jacking oil cylinder is positioned below the supports, the supports are connected with the shell through a connecting shaft, the direction of the connecting shaft is perpendicular to the direction of the jacking table pushed by the gear transmission mechanism, the oil cylinder capable of transversely pushing is arranged above the supports, and the transversely pushing oil cylinder can push the jacking table along the direction of the connecting shaft; because the actual bridge is not necessarily straight, if the bridge with a certain bending amount needs to be constructed, a certain amount of transverse deviation is needed in the transportation process of the steel box girder, the transverse pushing oil cylinder can help the steel box girder to perform transverse deviation, and the connecting shaft can guide the transverse movement of the shell.
Preferably, the transverse pushing oil cylinder is provided with a roller, the transverse pushing oil cylinder pushes the pushing table through the roller, and the rolling direction of the roller at the contact part of the roller and the pushing table is the same as the direction of the pushing table pushed by the gear transmission mechanism; when the pushing machine carries out carry and retreat, the pushing platform is always in contact with the roller and rolls relatively, the roller can guide the pushing platform in the carry and retreat direction, and the roller and the pushing platform generate rolling friction, so that the carry and retreat are not greatly hindered.
Preferably, an automatic oiling assembly is mounted on one side, far away from the rack, of the output gear, the automatic oiling assembly comprises an oil groove, an oil absorption piece is arranged in the oil groove, and a brush capable of contacting with the output gear and oiling is arranged on the oil absorption piece; the existing oiling method is that oil is directly sprayed to the meshing part of the gear at intervals, the method has high oil consumption, and because the lubrication effect is good when the oil is just sprayed, the lubrication effect is poor when the gear rotates for a period of time before the next oil spraying, the lubrication effect is uneven; the automatic oiling assembly can brush oil when the toothed part of the output gear rotates to the brush, and compared with direct oil injection, the single oil feeding amount of the oil brushing is small, so that the waste of lubricating oil is avoided; in the brush brushing oil, the tooth portion of output gear can take place mutual extrusion with the brush, thereby cause the extrusion of oil absorption piece, oil absorption piece after the extrusion can extrude partial oil on the brush, the back is accomplished to the brushing oil, the tooth portion of taking of output gear leaves the brush, and scarce tooth portion can not contact with the brush, the oil absorption piece that is extruded this moment recovers, and from the oil absorption in the oil groove, this mechanism can realize automatic oiling, need not to carry out active control to oiling mechanism, only just can oil at output gear pivoted in-process, and the oil mass is little on the single, it is even to oil.
The pushing table is provided with a contact pad; the contact pad can prevent the pushing platform from being in direct contact with the steel box girder, so that the steel box girder is rigidly extruded to cause deformation.
Therefore, the invention has the following beneficial effects: (1) the gear transmission mechanism as the power system does not need to change direction during pushing, so that the impact caused by changing direction is avoided, the power system is protected, the higher pushing speed can be adapted, and the pushing efficiency is improved; (2) the carrying and retreating movement of the pushing table can be completed by only one motor, so that the equipment cost is saved, the synchronism of the gear is improved, and the motor is prevented from being locked; (3) in the pushing process, the lower part of the pushing table is not easy to deviate; (4) the position of the steel box girder can be transversely adjusted in the process of pushing the steel box girder; (5) can oil automatically to the oil mass is little in the single, can not cause lubricating oil extravagant, oils evenly.
Drawings
Fig. 1 is a top view of an upper layer of an interior of an enclosure of the present invention.
Fig. 2 is a top view of the lower interior layer of an enclosure of the present invention.
Fig. 3 is a top view of the present invention.
Fig. 4 is a front view of the present invention.
FIG. 5 is a schematic illustration of the present invention in a construction environment.
In the figure: 1. the device comprises a shell 2, a jacking oil cylinder 3, a guide shaft 4, a jacking platform 5, a steel box girder 6, a carry rack 7, a return rack 8, a contact pad 9, a carry gear 10, a return gear 11, a transmission gear 12, a transmission shaft 13, an input gear 14, a driven gear 15, a sensor 16, a support 17, a connecting seat 18, a connecting shaft 19, a transverse pushing oil cylinder 20, a roller 21, an oil groove 22, an oil absorption piece 23, a brush 24 and an oil port.
Detailed Description
The invention is further described with reference to the following detailed description and accompanying drawings.
In the embodiment shown in fig. 1-4, a pusher for bridge construction can drive a steel box girder to move in three directions, namely, a jacking return motion, a carry return motion and a transverse offset motion, wherein the three directions are vertical, the pusher comprises a shell 1, a jacking oil cylinder 2 is mounted at the bottom of the shell, a guide shaft 3 is arranged on the shell, and the length direction of the guide shaft is the same as the direction of the carry return motion; the steel box girder jacking device is characterized in that a jacking table 4 is mounted on the guide shaft, the upper portion of the jacking table is wide and is used for jacking a steel box girder 5, the lower portion of the jacking table is narrow, racks are arranged on two sides of the lower portion of the jacking table, the rack located on the front side of the lower portion of the jacking table is a carry rack 6, the rack located on the rear side of the lower portion of the jacking table is a retreat rack 7, a contact pad 8 is further arranged on the jacking table, the upper side face of the contact pad can be inclined, and the specific inclination angle is determined by the inclination angle of the steel box girder where the jacking machine is located; a gear transmission mechanism used for pushing the pushing platform to move horizontally is arranged in the shell and comprises a plurality of output gears, each output gear comprises a carry gear 9 used for controlling the pushing platform to carry and a retreat gear 10 used for controlling the retreat of the pushing platform, the carry gear is meshed with a carry rack, the retreat gear is meshed with a retreat rack, and the carry gear and the retreat gear are both tooth-lacking gears; a transmission gear 11 which synchronously rotates with the output gears is arranged below all the output gears, a shaft connecting the output gears and the transmission gears is a transmission shaft 12, all the transmission gears are meshed with an input gear 13 and are driven by the input gear to rotate, and the input gear is controlled by an input motor to rotate; in the embodiment, the input gear rotates anticlockwise to drive 4 transmission gears meshed with the input gear to rotate clockwise, so as to drive 2 carry gears and 2 retreat gears to rotate clockwise, the front side of the carry rack is provided with 2 carry gears, the middle of each 2 carry gears is provided with a driven gear 14 meshed with the carry rack, the rear side of the retreat rack is provided with 2 retreat gears, and the middle of each 2 retreat gears is provided with a driven gear meshed with the retreat rack; the casing is also internally provided with an in-place detection assembly, the in-place detection assembly comprises a sensor 15 for detecting limit positions of two ends of the jacking table in the direction pushed by the gear transmission mechanism, when one end of the jacking table is detected by the sensor, the jacking oil cylinder is controlled by a hydraulic control system to jack upwards, when the other end of the jacking table is detected by the sensor, the jacking oil cylinder is controlled by the hydraulic control system to return downwards, the sensor is a correlation sensor and is arranged on two sides of the lower part of the jacking table, when the jacking table moves to the limit position in the carry direction, the correlation sensor on the right part of the casing is blocked, and when the jacking table moves to the limit position in the retreat direction, the correlation sensor on the left part of the casing is blocked; two sides of the shell are provided with supports 16, the jacking oil cylinder is positioned below the supports, a connecting seat 17 is arranged in the shell, the supports and the connecting seat are connected through a connecting shaft 18, the direction of the connecting shaft is perpendicular to the direction of the jacking table pushed by the gear transmission mechanism, namely the direction of transverse offset motion, a transverse pushing oil cylinder 19 is arranged above the supports, and the transverse pushing oil cylinder can push the jacking table along the direction of the connecting shaft; the transverse pushing oil cylinder is provided with a roller 20, the transverse pushing oil cylinder pushes the pushing table through the roller, the rolling direction of the roller at the contact part of the roller and the pushing table is the same as the direction of the pushing table pushed by the gear transmission mechanism, and the outer side of the shell is provided with a guide surface in contact with the roller; the output gear distance one side department that the rack is far away installs automatic subassembly that oils, the automatic subassembly that oils includes oil groove 21, be equipped with oil absorption piece 22 in the oil groove, be equipped with on the oil absorption piece can with output gear contact and the brush 23 that oils, be equipped with the hydraulic fluid port 24 that can refuel to the oil groove in the shell, the material of oil absorption piece is the oil absorption sponge, the brush is inserted in the oil absorption sponge.
In the process of pushing the bridge, the input motor in the embodiment only needs to rotate continuously in a single direction, so that the pushing machine can move back and forth in the carrying and retreating direction, and the concrete process is as follows: starting an input motor, wherein the pushing table is located at the middle position in the carrying and retreating direction; the input motor drives the input gear to rotate anticlockwise; the input gear drives 4 transmission gears meshed with the input gear to rotate clockwise; because the transmission gear is connected with the output gears through the transmission shaft, 4 output gears synchronously rotate clockwise, the back gear is firstly meshed with the back rack for transmission, the tooth-lacking part of the carry gear faces the carry rack at the moment, the carry gear is not contacted with the pushing platform, and the back gear drives the pushing platform to move leftwards; in the process of the meshing motion of the retreating gear and the retreating rack, the front side of the lower part of the pushing platform is subjected to the supporting force from the driven gear, and cannot generate transverse offset; when the toothed part of the retreating gear rotates to pass through the contact part with the retreating rack, the pushing table stops moving, the pushing table is positioned at the leftmost side, and the correlation sensor positioned at the left part of the shell sends a signal to the control system because the correlation sensor is blocked by the lower part of the pushing table; the control system controls the jacking cylinder to jack upwards after receiving a signal and drives the jacking table to lift up, the jacking table cannot be rigidly extruded with the steel box girder under the action of the contact pad, the steel box girder can be prevented from deforming, and the carry gear and the return gear are both towards the rack with the tooth-lacking part in the jacking process; when the toothed part of the carry gear rotates to a position contacting with the carry rack, the pushing platform starts to move rightwards, the jacking cylinder finishes jacking at the moment, and the pushing platform drives the steel box girder to move together; when the toothed part of the backing gear moves to the position of the hairbrush, the toothed part and the hairbrush are extruded, the hairbrush simultaneously extrudes the oil absorption sponge, and the extruded oil absorption sponge extrudes oil onto the hairbrush and brushes the oil on the teeth of the backing gear through the hairbrush; when the toothed part of the return gear leaves the position of the hairbrush, the shape of the oil absorption sponge is restored, the oil absorption sponge can absorb oil in the oil groove in the expansion process to prepare for next oiling, and similarly, when the toothed part of the carry gear passes through the position of the hairbrush, automatic oiling can be performed; in the process that the carry gear is in meshing transmission with the carry rack, the rear side of the lower part of the pushing platform is subjected to supporting force from the driven gear; no lateral offset occurs; when the toothed part of the carry gear rotates to a contact position with the carry rack, the pushing table stops moving, the pushing table is positioned at the rightmost side at the moment, and the correlation sensor positioned at the right part of the shell sends a signal to the control system because the correlation sensor is blocked by the lower part of the pushing table; the control system controls the jacking cylinder to return downwards after receiving the signal, and the steel box girder is put down; and then the pushing platform moves leftwards again to realize circulation, and the rollers can guide the pushing platform when the pushing platform moves leftwards and rightwards repeatedly.
When the pushing engineering of the bridge with the radian is carried out, the transverse position of the steel box girder needs to be adjusted while the steel box girder carries, and the transverse pushing oil cylinder can complete transverse offset of the shell while the pushing platform carries and retreats.
Claims (6)
1. A pusher for bridge construction comprises a shell, wherein a jacking oil cylinder is arranged at the bottom of the shell, and the pusher is characterized in that a pushing platform for jacking and pushing a bridge construction assembly is arranged on the shell, and a gear transmission mechanism for pushing the pushing platform to move horizontally is arranged in the shell; the gear transmission mechanism comprises a plurality of output gears, the side face of the lower part of the pushing platform is provided with a rack, the output gears comprise a carry gear for controlling the carry of the pushing platform and a return gear for controlling the return of the pushing platform, the carry gear and the return gear are gear lacking gears, a detection assembly in place is further arranged in the shell, the detection assembly in place comprises a sensor for detecting the limit positions of the two ends of the pushing platform in the direction pushed by the gear transmission mechanism, when one end of the pushing platform is detected by the sensor, the jacking oil cylinder is controlled by a hydraulic control system to lift upwards, when the other end of the pushing platform is detected by the sensor, the jacking oil cylinder is controlled by the hydraulic control system to return downwards, the two sides of the lower part of the pushing platform are both provided with racks, wherein the rack on one side is a carry rack, and the rack on the other side is a return rack, the output gear meshed with the carry rack is a carry gear, the output gear meshed with the return rack is a return gear, the carry gear and a shaft rotating with the return gear are driven to serve as transmission shafts, a transmission gear synchronously rotating with the carry gear or the return gear on the shaft is arranged on the transmission shafts, an input gear is further arranged in the shell, and the input gear is meshed with the transmission gear.
2. The pushing machine for bridge construction as claimed in claim 1, wherein the rack bars on both sides of the lower portion of the pushing platform are further engaged with driven gears.
3. The jacking machine of claim 1, wherein supports are disposed on two sides of the housing, the jacking cylinder is disposed under the supports, the supports are connected to the housing through a connecting shaft, the connecting shaft is perpendicular to the direction of the jacking table pushed by the gear transmission mechanism, and a transverse pushing cylinder is disposed above the supports and can push the jacking table along the direction of the connecting shaft.
4. The pusher of claim 3, wherein the lateral pushing cylinder is provided with a roller, the lateral pushing cylinder pushes the pushing table through the roller, and the rolling direction of the roller at the contact position with the pushing table is the same as the direction of the pushing table pushed by the gear transmission mechanism.
5. The thruster of claim 1, wherein an automatic oiling component is mounted on the side of the output gear far from the rack, the automatic oiling component comprises an oil tank, an oil absorption member is disposed in the oil tank, and a brush capable of contacting and oiling the output gear is disposed on the oil absorption member.
6. The pusher for bridge construction according to any one of claims 1-5, wherein the pusher table is provided with a contact pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010053421.6A CN111395199B (en) | 2020-01-17 | 2020-01-17 | Pushing machine for bridge construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010053421.6A CN111395199B (en) | 2020-01-17 | 2020-01-17 | Pushing machine for bridge construction |
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| Publication Number | Publication Date |
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| CN111395199A CN111395199A (en) | 2020-07-10 |
| CN111395199B true CN111395199B (en) | 2021-07-30 |
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| CN202010053421.6A Active CN111395199B (en) | 2020-01-17 | 2020-01-17 | Pushing machine for bridge construction |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU771239A1 (en) * | 1978-12-25 | 1980-10-15 | Хабаровский политехнический институт | Arrangement for sliding-on the span structure of a bridge |
| CN205443941U (en) * | 2015-10-14 | 2016-08-10 | 中建钢构有限公司 | Suspension bridge pushing device and top push away system |
| CN107419682A (en) * | 2017-08-17 | 2017-12-01 | 张大伟 | A kind of construction site cleaning dust removal vehicle |
| CN107841957A (en) * | 2017-12-25 | 2018-03-27 | 中铁二局第五工程有限公司 | A kind of large-tonnage steel box beam thrustor, pushing tow system and pushing method |
| CN107938503A (en) * | 2018-01-12 | 2018-04-20 | 长沙理工大学 | Adjustable bridge steel rail support |
| CN110124375A (en) * | 2019-04-24 | 2019-08-16 | 王秀兰 | A kind of hydraulic engineering silt draining equipment |
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