Self-propelled extensible maintenance equipment and maintenance method for railway cast-in-place box girder

Abstract

The invention discloses self-propelled extensible maintenance equipment and maintenance method for a railway cast-in-place box girder, a first-stage folding and unfolding mechanism and a second-stage folding and unfolding mechanism of an extensible support system are respectively matched with a flange, a web plate and a bottom plate of the box girder, so that spraying pipelines are distributed in the first-stage folding and unfolding mechanism and the second-stage folding and unfolding mechanism; according to the box girder concrete curing device, accurate spraying curing can be synchronously conducted on concrete at flanges, webs and bottom plates of a box girder, so that the box girder concrete is comprehensively cured, the curing effect is improved, meanwhile, the first-stage folding and unfolding mechanism and the second-stage folding and unfolding mechanism can independently rotate and cooperate with each other to achieve second-stage unfolding of the expandable support system, and therefore bridge pier passing spaces with different widths are provided; therefore, the maintenance equipment can move on the box girder through the pier to realize maintenance of multiple girder sections, so that the maintenance efficiency is improved, and the maintenance effect and reliability are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of railway bridges, and in particular to the field of railway box girder maintenance. Background Art

[0002] Spray curing of cast-in-place concrete box girders for railways is a key link in concrete construction. It is mainly used to control the temperature and humidity during the concrete hardening process to ensure the strength and durability of the box girders. However, the lower surface of the box girder is usually high from the ground, making manual spray curing difficult. Using sprinkler trucks or aerial work vehicles for spray curing is expensive, the spraying is highly random, and there is insufficient water in some local areas, resulting in uneven curing effects.

[0003] Chinese patent publication number CN 205950984U discloses a top-mounted concrete precast beam maintenance vehicle, including a traveling system, a water supply system, a power unit, and a control system; the traveling system includes a traveling base and wheels, the wheels are connected to the traveling base via wheel axles, the wheel axles of the wheels are connected to the power unit, and the power unit is connected to the control system; the water supply system includes a first pipe, a second pipe, a water pump, and a spray device, the water pump is connected to the control system, the water supply system, power unit, and control system are located on the traveling base, and the water supply system also includes a cross bar, the length of which is adjustable and fixed to a bracket on the traveling base.

[0004] However, the maintenance equipment provided by the above solution performs water spraying on both sides of the box girder for maintenance. The spraying is highly random, the water volume in some local areas is insufficient, and the concrete on the bottom of the box girder cannot be maintained, resulting in poor molding quality of the box girder concrete. At the same time, the maintenance equipment provided by the above solution moves on the box girder body and cannot cross the bridge piers. It can only maintain a section of the beam, which is inefficient.

[0005] Therefore, how to effectively improve the curing effect of curing equipment on box girder concrete and improve curing efficiency and reliability has become an urgent problem to be solved in this field. Summary of the Invention

[0006] In view of the defects of the prior art, the purpose of the present invention is to provide a self-propelled deployable maintenance equipment and a maintenance method for railway cast-in-situ box girders with good maintenance effect, high efficiency and high reliability.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a self-propelled deployable maintenance equipment for railway cast-in-situ box girders, which cooperates with the box girders and bridge piers, includes a self-propelled mechanism and a spraying system, as well as a bridge deck support system, a deployable bracket system and a control system.

[0008] The bridge deck support system is distributed along the width direction of the box girder and is respectively connected to the self-propelled mechanism, the spraying system and the deployable support system. The self-propelled mechanism is configured to drive the bridge deck support system, the spraying system and the deployable support system to move synchronously along the bridge deck.

[0009] The deployable support system is respectively arranged at both ends of the bridge deck support system, and includes a primary folding and deploying mechanism and a secondary folding and deploying mechanism. The primary folding and deploying mechanism is connected to the bridge deck support system, and is used to cooperate with the flange of the box beam and can rotate around the bridge deck support system. The secondary folding and deploying mechanism is connected to the primary folding and deploying mechanism, and is used to cooperate with the web and bottom plate of the box beam and can rotate around the primary folding and deploying mechanism.

[0010] The spray system includes spray pipelines, which are respectively distributed on the first-level folding and unfolding mechanism and the second-level folding and unfolding mechanism, and nozzles are evenly arranged on the spray pipelines.

[0011] The control system is configured to control the working states of the self-propelled mechanism, the sprinkler system, the bridge deck support system and the deployable bracket system respectively.

[0012] Furthermore, the bridge deck support system includes main beams distributed along the width direction of the bridge deck, and the self-propelled mechanism is respectively arranged at the two end areas of the main beams through the cooperation of transverse support members and longitudinal support members, and can move along the length direction of the bridge deck.

[0013] Furthermore, both ends of the bridge deck support system are respectively provided with constraint components for cooperating with the deployable bracket system, and the constraint components include a rotating shaft connector arranged at the end of the main beam, a fixing member distributed at an angle to the main beam, and a jacking device arranged in the fixing member. The end of the first-level folding and unfolding mechanism cooperates with the jacking device and is connected to the rotating shaft connector through a rotating shaft.

[0014] Furthermore, the primary folding and unfolding mechanism includes a side end pipeline attachment distributed at the side end of the box beam for cooperating with the constraint assembly and a flange pipeline attachment distributed below the flange.

[0015] Furthermore, the first-level folding and unfolding mechanism also includes a support reinforcement component, the side end pipeline attachment parts and the flange pipeline attachment parts are configured to be spatially staggered, and the two ends of the support reinforcement component are respectively connected to the side end pipeline attachment parts and the flange pipeline attachment parts.

[0016] Furthermore, a driving gear is provided in the first end area of the side pipe attachment that cooperates with the constraint assembly, and a driven gear is provided at the second end. A fixed gear is provided at the end of the flange pipe attachment that cooperates with the secondary folding and unfolding mechanism. The driving gear and the driven gear are linked to each other through a first transmission rod, and the driven gear and the fixed gear are linked to each other through a second transmission rod.

[0017] Furthermore, the secondary folding and unfolding mechanism includes a web pipe attachment distributed on the outside of the web and a bottom plate pipe attachment distributed under the bottom plate, one end of the web pipe attachment is connected to the fixed gear, and the other end is connected to the bottom plate pipe attachment.

[0018] Furthermore, the spray system also includes a water pump arranged on the bridge deck, one end of the spray pipe is connected to the water pump, and the other end is distributed in the side end pipe attachment, flange pipe attachment, web pipe attachment and bottom plate pipe attachment in sequence.

[0019] In order to achieve the above-mentioned object, the present invention provides a maintenance method for a railway cast-in-situ box girder, based on the self-propelled deployable maintenance equipment for the railway cast-in-situ box girder, and the maintenance method comprises:

[0020] The primary folding and unfolding mechanism of the deployable support system rotates around the bridge deck support system, changing from the primary deployment state to the spraying working state. The spraying system simultaneously sprays and maintains the concrete on the flange, web and bottom plate of the box girder along the primary and secondary folding and unfolding mechanisms.

[0021] The self-propelled mechanism drives the bridge deck support system's spray system and deployable bracket system to move back and forth on the bridge deck, completing the maintenance of the first beam section;

[0022] The first-level folding and unfolding mechanism of the deployable support system rotates around the bridge deck support system, returning from the spraying working state to the first-level unfolding state. The second-level folding and unfolding mechanism rotates around the first-level folding and unfolding mechanism, changing from the first-level unfolding state to the second-level unfolding state, providing passage space for the bridge piers.

[0023] The self-propelled mechanism drives the bridge deck support system, sprinkler system and deployable bracket system to move synchronously through the pier to the second beam section for maintenance.

[0024] The present invention provides self-propelled deployable maintenance equipment and a maintenance method for a cast-in-place box girder of a railway. The primary and secondary folding and unfolding mechanisms of the deployable support system cooperate with the flange, web, and bottom plate of the box girder, respectively, so that spray pipelines are distributed in the primary and secondary folding and unfolding mechanisms. The concrete at the flange, web, and bottom plate of the box girder can be sprayed and maintained simultaneously, thereby comprehensively maintaining the box girder concrete and improving the maintenance effect. At the same time, the primary and secondary folding and unfolding mechanisms can rotate independently and cooperate with each other to achieve the secondary deployment of the deployable support system, thereby providing passage spaces for piers of different widths. This allows the maintenance equipment to move on the box girder through the piers and achieve maintenance of multiple beam sections, thereby improving maintenance efficiency and ensuring maintenance effect and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 A schematic diagram of the overall structure of the self-propelled deployable maintenance equipment for the railway cast-in-situ box girder provided by the present invention;

[0027] Figure 2 Schematic diagram of the structure of the bridge deck support system in the present invention;

[0028] Figure 3 Schematic diagram of the structure of the self-propelled mechanism of the present invention;

[0029] Figure 4 Schematic diagram of the structure of the deployable stent system of the present invention;

[0030] Figure 5 Schematic diagram of the primary deployment state of the deployable stent system of the present invention;

[0031] Figure 6 Schematic diagram of the structure of the constraint component in the present invention;

[0032] Figure 7 Schematic diagram of the secondary deployment state of the deployable stent system of the present invention;

[0033] Figure 8 and Figure 9 Schematic diagram of the structure of the gear linkage assembly in the present invention;

[0034] Figure 10 and Figure 11 It is a structural schematic diagram of the spray system in the present invention.

[0035] Reference numerals:

[0036] 1. Box girder; 11. Bridge deck; 12. Flange; 13. Web; 14. Bottom plate; 2. Piers;

[0037] 100. Self-propelled mechanism; 110. Drive motor; 120. Traveling base; 130. Traveling wheels;

[0038] 200. Sprinkler system; 210. Sprinkler pipeline; 220. Nozzle; 230. Water pump;

[0039] 300. Bridge deck support system; 310. Main beam; 320. Transverse support member; 330. Longitudinal support member; 340. Restraint assembly; 341. Rotating shaft connector; 342. Fixing member; 3421. Matching groove; 3422. First limiting hole; 3423. Second limiting hole; 3423. Pin; 343. Lifting device;

[0040] 400. Expandable support system; 410. Primary folding and unfolding mechanism; 411. Side end pipeline attachment; 4111. First end; 4112. Second end; 4113. Rotating shaft; 412. Flange pipeline attachment; 4121. Outer end; 4122. Inner end; 413. Support reinforcement assembly; 4131. First support reinforcement rod; 4132. Second support reinforcement rod; 4133. Third support reinforcement rod; 420. Secondary folding and unfolding mechanism; 421. Web pipeline attachment; 422. Bottom plate pipeline attachment; 430. Gear linkage assembly; 431. Driving gear; 432. Driven gear; 433. Fixed gear; 4331. Rotating shaft; 4332. Turntable; 434. First transmission rod; 435. Second transmission rod. DETAILED DESCRIPTION

[0041] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0042] See also Figure 1 , which shows an example of the self-propelled deployable maintenance equipment for the railway cast-in-situ box girder provided by the present invention.

[0043] As can be seen from the figure, the self-propelled deployable maintenance equipment for the cast-in-place railway box girder in this example cooperates with the box girder 1 and the bridge pier 2, and mainly includes a traveling mechanism 100, a spraying system 200, a bridge deck support system 300, a deployable support system 400 and a control system.

[0044] The bridge deck support system 300 is distributed along the width direction of the bridge deck 11 of the box girder 1, and is respectively connected to the self-propelled mechanism 100, the spraying system 200 and the deployable support system 400. The self-propelled mechanism 100 is configured to drive the bridge deck support system 300, the spraying system 200 and the deployable support system 400 to move synchronously along the bridge deck 11; the deployable support system 400 is respectively arranged at both ends of the bridge deck support system 300, and includes a primary folding and unfolding mechanism 410 and a secondary folding and unfolding mechanism 420. The primary folding and unfolding mechanism 410 is connected to the bridge deck support system 300 and is used to cooperate with the flange 12 of the box girder 1 to be able to The secondary folding and unfolding mechanism 420 rotates around the bridge deck support system 300, and is connected to the primary folding and unfolding mechanism 410, so as to cooperate with the web 13 and the bottom plate 14 of the box girder 1, and can rotate around the primary folding and unfolding mechanism 410; the spraying system 200 includes a spraying pipe 210, which is respectively distributed on the primary folding and unfolding mechanism 410 and the secondary folding and unfolding mechanism 420, and nozzles 220 are evenly arranged on the spraying pipe 210; the control system is configured to respectively control the working states of the self-propelled mechanism 100, the spraying system 200, the bridge deck support system 300 and the deployable support system 400.

[0045] In this way, the self-propelled mechanism 100, the spraying system 200, the bridge deck support system 300 and the deployable support system 400 cooperate with each other to achieve synchronous and accurate spraying maintenance of the concrete at the flange 12, web 13 and bottom plate 14 of the box girder 11, thereby improving the maintenance effect. In addition, the deployable support system 400 can achieve two-level expansion, providing passage space for piers of different widths, and can carry out maintenance of multiple beam sections through the piers, thereby improving maintenance efficiency and reliability.

[0046] Combine Figure 1 and Figure 2 The bridge deck support system 300 is composed of a main beam 310, a transverse support member 320 and a longitudinal support member 330, which cooperate with each other to enable the bridge deck support system 300 to be stably connected to the walking mechanism 100, the sprinkler system 200, and the deployable support system 400, and to place the maintenance equipment on the bridge deck 11 of the box beam 1.

[0047] Specifically, the main beam 310 is distributed along the width direction of the bridge deck 11, and the transverse support members 320 and the longitudinal support members 330 are in a three-dimensional connection and coordination structure and are distributed at both end areas of the main beam 310 to ensure that the main beam 310 is stably placed on the bridge deck 11, while enabling the self-propelled mechanism 100 to be arranged at both end areas of the main beam 310 through the coordination of the transverse support members 320 and the longitudinal support members 330.

[0048] Combine Figure 2 and Figure 3,, further, the self-propelled mechanism 100 includes a drive motor 110, a walking base plate 120 and walking wheels 130. The walking base plate 120 is distributed along the length direction of the bridge deck 11 and is respectively connected to the transverse support member 320 and the longitudinal support member 330. The walking wheels 130 are respectively arranged at both ends of the walking base plate 120. The drive motor 110 is connected to the control system so that the control system can control the drive motor 110 to work and provide working power for the walking wheels 130, so that the self-propelled mechanism 110 can move along the length direction of the bridge deck 110 through the walking wheels 130.

[0049] In this way, the self-propelled mechanism 100 is respectively arranged at the two end areas of the main beam 310 to drive the bridge deck support system 300 to move stably along the length direction of the bridge deck 110, and simultaneously drive the sprinkler system 200 and the deployable support system 400 to move synchronously along the length direction of the bridge deck 11, thereby moving to multiple beam sections of the box beam 1, completing the maintenance of multiple beam sections, and improving the maintenance efficiency.

[0050] Furthermore, the control system can also control the drive motor 110 to provide opposite working power to the walking wheel 130, so that the self-propelled mechanism 100 drives the spraying system 200 and the deployable support system 400 to move back and forth synchronously on a beam section, ensuring the maintenance effect and reliability of the beam section.

[0051] In order to fully spray and maintain the concrete of the box girder 1, the deployable support system 400 is respectively arranged at both ends of the bridge deck support system 300, including a primary folding and unfolding mechanism 410 and a secondary folding and unfolding mechanism 420. The primary folding and unfolding mechanism 410 can rotate around the bridge deck support system 300 and cooperate with the flange 12 of the box girder 1. The secondary folding and unfolding mechanism 420 can rotate around the primary folding and unfolding mechanism 410 and cooperate with the web 13 and bottom plate 14 of the box girder 1.

[0052] Combine Figure 4 Specifically, the first-level folding and unfolding mechanism 410 includes a side end pipe attachment 411, a flange pipe attachment 412 and a support reinforcement assembly 413. The side end pipe attachment 411 is distributed at the side end of the box girder 1, is distributed vertically, and cooperates with the bridge deck support system 300. The flange pipe attachment 412 is distributed below the flange. The side end pipe attachment 411 and the flange pipe attachment 412 are configured to be spatially staggered and are connected to each other through the support reinforcement assembly 413.

[0053] As an example, the support reinforcement assembly 413 includes three support reinforcement rods, one end of the first support reinforcement rod 4131 is connected to the first end 4111 of the side end pipe attachment 411 and the bridge deck support system 300, and the other end is connected to the outer end 4121 of the flange pipe attachment 412; one end of the second support reinforcement rod 4132 is connected to the second end 4112 of the side end pipe attachment 411, and the other end is connected to the outer end 4121 of the flange pipe attachment 412; one end of the third support reinforcement rod 4133 is connected to the second end 4112 of the side end pipe attachment 411, and the other end is connected to the area of the flange pipe attachment 412 close to the inner end 4122.

[0054] In this way, the two ends of the support reinforcement component 413 are respectively connected to the side end pipe attachment 411 and the flange pipe attachment 412, which can firmly connect the spatially displaced side end pipe attachment 411 and the flange pipe attachment 412, ensure the stable distribution of the first-level folding and unfolding mechanism 410, and thus ensure effective spraying maintenance of the concrete at the flange 12.

[0055] Combine Figure 4 Furthermore, the secondary folding and unfolding mechanism 420 includes a web pipe attachment 421 distributed on the outside of the web 13 and a bottom plate pipe attachment 422 distributed under the bottom plate 14. The bottom plate pipe attachment 422 is distributed along half of the bottom plate 14, and one end of the web pipe attachment 421 is connected to the flange pipe attachment 412, and the other end is connected to the bottom plate pipe attachment 422, so that the secondary folding and unfolding mechanism 420 is stably connected to the primary folding and unfolding mechanism 410, thereby ensuring effective spraying and curing of the concrete at the web 13 and the bottom plate 14.

[0056] In this way, the first-level folding and unfolding mechanism 410 and the second-level folding and unfolding mechanism 420 cooperate with each other and are respectively distributed corresponding to the flange 12, web 13 and bottom plate 14 of the box girder 1, so that the spray pipe 210 is distributed along the first-level folding and unfolding mechanism 410 and the second-level folding and unfolding mechanism 420, and can synchronously spray and maintain the concrete at the flange 12, web 13 and bottom plate 14 of the box girder 1.

[0057] Furthermore, the bottom plate pipeline attachments 422 are distributed corresponding to half of the area of the bottom plate 14, so that the deployable bracket systems 400 at both ends of the bridge deck support system 300 are relatively distributed, which can cover the flanges 12, webs 13 and the entire bottom plate 14 on both sides of the box girder 1, thereby realizing the comprehensive concrete maintenance of the box girder 11 and improving the maintenance effect.

[0058] Combine Figure 5In the initial state, the side-end pipe attachment 411 rotates around the bridge deck support system 300 toward the outside of the box girder 1 and tilts toward the outside of the box girder 1, thereby driving the primary folding and unfolding mechanism 410 and the secondary folding and unfolding mechanism 420 to synchronously rotate toward the outside of the box girder 1, thereby realizing the primary deployment of the deployable support system 400, thereby increasing the distance between the deployable support system 400 and the box girder 1. The primary folding and unfolding mechanism 410 and the secondary folding and unfolding mechanism 420 are not distributed corresponding to the flange 12, the web 13 and the bottom plate 14, so as to ensure that the deployable support system 400 does not collide with the box girder 1 during its movement along the bridge deck 11.

[0059] Combine Figure 1 When the deployable support system 400 moves to the middle of the beam section, the side end pipe attachment 411 rotates around the bridge deck support system 300 toward the outside of the box girder 1, driving the primary folding and unfolding mechanism 410 and the secondary folding and unfolding mechanism 420 to synchronously tilt toward the outside of the box girder 1, thereby reducing the distance between the deployable support system 400 and the box girder 1. This allows the primary folding and unfolding mechanism 410 and the secondary folding and unfolding mechanism 420 to be distributed correspondingly to the flange 12, the web 13, and the bottom plate 14, respectively, enabling spray maintenance operations and realizing the spray operation state of the deployable support system 400.

[0060] Combine Figure 1 In order to ensure that the side-end pipe attachment 411 can rotate stably around the bridge deck support system 300 and maintain the first-level deployment state or spraying operation state of the deployable bracket system 400, the bridge deck support system 300 is provided with a constraint component 340 at both ends for cooperating with the side-end pipe attachment 411. The constraint component 340 is configured to drive the side-end pipe attachment 411 to rotate and to fix the side-end pipe attachment 411 in a distributed state.

[0061] Combine Figure 5 and Figure 6 Specifically, the constraint assembly 340 includes a shaft connector 341, a fixing member 342 and a jacking device 343. The shaft connector 341 is arranged at the end of the main beam 310 to form a shaft connection hole. The fixing member 342 is arranged on the main beam 310 and is distributed at an angle to the main beam 310. A matching groove 3421 that can accommodate the jacking device 343 and match with the side end pipeline attachment member 41 is formed in the fixing member 342, so that the jacking device 343 is arranged in the matching groove 3421 of the fixing member 342, can extend out of the fixing member 342 to match with the side end pipeline attachment member 41, and can also be retracted and stored in the fixing member 342.

[0062] Furthermore, the first end portion 4111 of the side-end pipe attachment 411 is embedded in the mating groove 3421 of the fixing member 342, and is in dynamic contact with the jacking device 343. The jacking device 343 can apply a thrust to the side-end pipe attachment 411. At the same time, a rotating shaft 4113 is provided in the area corresponding to the side-end pipe attachment 411 and the rotating shaft connector 341, so that the side-end pipe attachment 411 is connected to the rotating shaft connector 341 through the rotating shaft 4113 and can rotate around the rotating shaft connector 341.

[0063] In this way, in the initial first-level deployment state of the deployable support system 400, the lifting device 343 extends in the matching groove 3421, generating a thrust on the side-end pipe attachment 411. Based on the lever principle, a smaller thrust can cause the side-end pipe attachment 411 to rotate in the reverse direction to the outside of the box beam 1 in the rotating shaft connector 341 through the rotating shaft 4113, and drive the flange pipe attachment 412 and the second-level folding and unfolding mechanism 420 to rotate synchronously in the reverse direction to the outside of the box beam 1, so as to reduce the distance between the deployable support system 400 and the box beam 1, so that the first-level folding and unfolding mechanism 410 and the second-level folding and unfolding mechanism 420 are distributed corresponding to the flange 12, the web 13 and the bottom plate 14 respectively, and the deployable support system 400 is transformed from the first-level deployment state to the spraying operation state.

[0064] Combine Figure 6 Furthermore, a first limiting hole 3422 is provided on the fixing member 342 along the length direction of the fixing member 342, which passes through the matching groove 3421. A pin shaft 3423 is inserted into the first limiting hole 3422 to limit the side end pipeline attachment member 411 so that the side end pipeline attachment member 411 stops rotating, thereby maintaining the spraying operation state of the deployable support system 400, thereby ensuring that the spraying system 200 effectively sprays and maintains the concrete of the box girder 1.

[0065] Here, the distribution position of the first limiting hole 3422 on the fixing part 342 needs to be adapted to the spraying operation state of the expandable bracket system 400 to ensure that the pin shaft 3423 is inserted into the first limiting hole 3422. When the side end pipe attachment part 411 is limited, the expandable bracket system 400 is in the spraying operation state, and the first-level folding and unfolding mechanism 410 and the second-level folding and unfolding mechanism 420 are distributed corresponding to the flange 12, the web 13 and the bottom plate 14 respectively.

[0066] Furthermore, when the spray maintenance of the beam section is completed and it is necessary to move to the next beam section, the pin 3423 in the first limiting hole 3422 is pulled out, and the jacking device 343 slowly shrinks and is stored in the matching groove 3421, and no thrust is generated on the side end pipe attachment 411. The expandable bracket system 400 is connected to the bridge deck support system 300 only through the rotating shaft 4113 and the rotating shaft connector 341. Due to the distribution structure of the first-level folding and unfolding mechanism 410 and the second-level folding and unfolding mechanism 420, based on the action of gravity, the expandable bracket system 400 will rotate around the bridge deck support system 300 in the rotating shaft connector 341 through the rotating shaft 4113, so that the center of gravity of the expandable bracket system 400 and the rotating shaft 4113 are on the same vertical line, so as to ensure that the expandable bracket system 400 can maintain a balanced and stable state.

[0067] Therefore, under the action of gravity, the side end pipe attachment 411 will rotate toward the outside of the box girder 1 through the rotating shaft 4113, and drive the flange pipe attachment 412 and the secondary folding and unfolding mechanism 420 to rotate toward the outside of the box girder 1 synchronously, so that the deployable support system 400 maintains a balanced and stable state, and at the same time increases the distance between the deployable support system 400 and the box girder 1, so that the primary folding and unfolding mechanism 410 and the secondary folding and unfolding mechanism 420 are no longer distributed corresponding to the flange 12, the web 13 and the bottom plate 14, and the deployable support system 400 is restored from the spraying operation state to the primary deployment state, and can move on the bridge deck 11 without colliding or interfering with the box girder 1.

[0068] Combine Figure 6 Correspondingly, a second limiting hole 3424 is provided along the length direction of the fixing part 342, which passes through the matching groove 3421. A pin shaft 3423 is inserted into the second limiting hole 3424 to limit the side end pipeline attachment part 411 so that the side end pipeline attachment part 411 stops rotating, thereby maintaining the first-level expansion state of the expandable bracket system 400.

[0069] Here, the distribution position of the second limiting hole 3424 on the fixing part 342 needs to be compatible with the first-level deployment state of the expandable bracket system 400, ensuring that the pin shaft 3423 is inserted into the second limiting hole 3424. When the side end pipe attachment 411 is limited, the expandable bracket system 400 is in the first-level deployment state, and the first-level folding and unfolding mechanism 410 and the second-level folding and unfolding mechanism 420 are not distributed correspondingly to the flange 12, the web 13 and the bottom plate 14.

[0070] At the same time, since the expandable support system 400 returns to the first-level expansion state due to gravity, the internal stress is small, and the force on the pin 3423 in the second limiting hole 3424 is very small, which can ensure the stability and safety of the maintenance equipment.

[0071] Furthermore, when the deployable support system 400 moves on the bridge deck 11 in the first-level deployed state, the first-level folding mechanism 410 will not collide with the box girder 1, but to move to the next beam section, it needs to pass through the bridge pier 2 with a larger width. When moving to the bridge pier 2, the second-level folding mechanism 420 has a smaller distance from the bridge pier 2 and will collide with the bridge pier 2, making it unable to pass through the bridge pier 2 and move to the next beam section.

[0072] Combine Figure 5 and Figure 7 Therefore, the first-level folding and unfolding mechanism 410 is also provided with a gear linkage assembly 430 for cooperating with the second-level folding and unfolding mechanism 420, so that the gear linkage assembly 430 can drive the second-level folding and unfolding mechanism 420 to rotate and unfold around the first-level folding and unfolding mechanism 410, changing the deployable support system 400 from the first-level unfolding state to the second-level unfolding state, increasing the distance between the second-level folding and unfolding mechanism 420 and the bridge pier 2 to provide space for the bridge pier to pass through, and ensuring that the deployable support system 400 can move smoothly to the next beam section.

[0073] Combine Figure 8 and Figure 9 Specifically, the gear linkage assembly 430 includes a driving gear 431, a driven gear 432 and a fixed gear 433 that cooperate with each other. The driving gear 431 is arranged in the first end 4111 area of the side end pipeline attachment 411 through a rotating shaft and is away from the constraint assembly 340. The driving gear 431 is connected to the control system so that the control system can drive the driving gear 432 to rotate. The driven gear 432 is arranged at the second end 4112 of the side end pipeline attachment 411 through a rotating shaft. The fixed gear 433 is arranged at the inner side end 4122 of the flange pipeline attachment 412 that cooperates with the secondary folding and unfolding mechanism 420, and the rotating shaft 4331 of the fixed gear 433 is arranged at the inner side end 4122 of the flange pipeline attachment 412. The turntable 4332 of the fixed gear 433 is mechanically fixed to the web pipeline attachment 421.

[0074] Furthermore, the driving gear 431 and the driven gear 432 are linked together through the first transmission rod 434. The driving gear 431 and the driven gear 432 are respectively arranged on the same side of the first transmission rod 434 and are respectively connected to the first transmission rod 434 through the sleeve. The driven gear 432 and the fixed gear 433 are linked together through the second transmission rod 435. The driven gear 432 and the fixed gear 433 are respectively arranged on the same side of the second transmission rod 435 and are respectively connected to the second transmission rod 435 through the sleeve.

[0075] In this way, the control system drives the driving gear 432 to rotate, and the driving gear 432 will drive the first transmission rod 434 to move along the rod diameter direction to drive the driven gear 432 to rotate synchronously. The rotation of the driven gear 432 will drive the second transmission rod 435 to move along the rod diameter direction and drive the fixed gear 433 to rotate synchronously. Since the fixed gear 433 is mechanically fixed to the web pipeline attachment 421, the fixed gear 433 will drive the web pipeline attachment 421 and the bottom plate pipeline attachment 422 to rotate synchronously around the fixed gear 433 to realize the expansion and folding of the secondary folding mechanism 420, thereby switching the expandable support system 400 between the primary expansion state and the secondary expansion state.

[0076] Combine Figures 7 to 9 As an example, the control system drives the driving gear 432 to rotate in the first direction. The driving gear 432 drives the driven gear 432 to rotate synchronously in the first direction via the first transmission rod 434, so that the driven gear 432 drives the fixed gear 433 to rotate synchronously in the first direction via the second transmission rod 435. This causes the web pipe attachment 421 and the bottom plate pipe attachment 422 to rotate synchronously around the fixed gear 433 in the first direction to face the outside of the box girder 1, thereby increasing the distance between the secondary folding and unfolding mechanism 420 and the pier 2, and unfolding the secondary folding and unfolding mechanism 420, thereby achieving the secondary unfolding state of the deployable support system 400, providing space for the pier to pass, and the deployable support system 400 can smoothly pass through the pier and move to the next beam section.

[0077] Furthermore, by adjusting the rotation range of the web pipe attachment 421 and the bottom plate pipe attachment 422 , the secondary deployment state of the deployable support system 400 can be adapted to accommodate bridge piers 2 and obstacles of different widths.

[0078] Combine Figure 5 On the contrary, the control system drives the driving gear 432 to rotate in the second direction. The driving gear 432 drives the driven gear 432 to rotate synchronously in the second direction through the first transmission rod 434, so that the driven gear 432 drives the fixed gear 433 to rotate synchronously in the second direction through the second transmission rod 435, so that the web pipe attachment 421 and the bottom plate pipe attachment 422 rotate synchronously around the fixed gear 433 in the second direction, so as to rotate in the opposite direction to the outer side of the box girder 1, reduce the distance between the secondary folding and unfolding mechanism 420 and the pier 2, fold the secondary folding and unfolding mechanism 420, and thus restore the deployable support system 400 from the secondary deployment state to the primary deployment state.

[0079] Here, during the switching process between the primary and secondary deployment states of the relatively distributed expandable stent system 400 at both ends, the gear linkage assembly 430 rotates in opposite directions to ensure that the relatively distributed expandable stent system 400 can switch between the primary and secondary deployment states synchronously.

[0080] The deployable support system 400 thus constructed can cooperate with the bridge deck support system 300 to realize the switching of the deployable support system 400 between the first-level deployment state, the spraying operation state and the second-level deployment state, ensuring that the deployable support system 400 can cooperate with the spraying system 200 in the spraying operation state to synchronously spray and maintain the concrete on all surfaces of the box girder 1. It can also pass through the beam section and the pier 2 in the first-level deployment state and the second-level deployment state to realize spray maintenance of multiple beam sections, thereby improving the maintenance efficiency and reliability of this maintenance equipment.

[0081] In coordination therewith, the spraying system 200 cooperates with the deployable support systems 400 at both ends of the bridge deck support system 300, so that the spraying systems 200 at both ends can work synchronously to carry out spraying maintenance of the entire concrete of the box girder 1.

[0082] Combine Figure 10 and Figure 11 Specifically, the spraying system 200 includes a spraying pipe 210, a nozzle 220 and a water pump 230. One end of the spraying pipe 210 is connected to the water pump 230, and the other end is respectively distributed in the first-level folding and unfolding mechanism 410 and the second-level folding and unfolding mechanism 420 of the deployable support system 400. The spraying pipe 210 can move synchronously with the first-level folding and unfolding mechanism 410 and the second-level folding and unfolding mechanism 420. In the spraying operation state of the deployable support system 400, the concrete at the flange 12, web 13 and bottom plate 14 of the box girder 1 is synchronously sprayed and maintained.

[0083] Combine Figure 1 Specifically, after the spray pipe 210 is connected to the water pump 230, it is set on the main beam 310, extends along the outside of the main beam 310, and is placed in the side end pipe attachment 411. It turns at the second end 4112 of the side end pipe attachment 411 and is placed in the flange pipe attachment 412, corresponding to the concrete at the flange 12. Then, it turns at the inner end 4122 of the flange pipe attachment 412 and is placed in the web pipe attachment 421 and the bottom plate pipe attachment 422, corresponding to the concrete at the web 13 and the bottom plate 14 respectively, and forms a seal at the end of the bottom plate 14.

[0084] Here, due to the flexibility of the spray pipe 210 itself, the spray pipe 210 can be freely turned and placed in each pipe attachment, and each pipe attachment can be composed of a pipe placement groove.

[0085] Furthermore, a plurality of nozzles 220 are evenly distributed on the spraying pipeline 210 so that the nozzles 220 correspond to the concrete at the flange 12 , the web 13 and the bottom plate 14 respectively.

[0086] In this way, the water pump 230 draws water from the external source, and the water in the spray pipe 210 is transported along the primary folding and unfolding mechanism 410 and the secondary folding and unfolding mechanism 420, flowing to the flange 12, the web 13 and the bottom plate 14 respectively, and sprayed from the nozzle 220 on the concrete at the flange 12, the web 13 and the bottom plate 14, and spray curing is carried out simultaneously, thereby improving the curing effect.

[0087] Furthermore, in order to ensure the reliability of the maintenance equipment, the maintenance equipment also includes a control system, which respectively connects and controls the working states of the self-propelled mechanism 100, the spraying system 200, the bridge deck support system 300 and the deployable support system 400, so as to respectively control the self-propelled mechanism 100, the spraying system 200, the bridge deck support system 300 and the deployable support system 400 to cooperate with each other, switch the state of the deployable support system 400, and perform concrete spraying maintenance operations on multiple beam sections.

[0088] Here, the control system is a conventional technical means in this field and will not be described in detail here. As an example, the control system can be composed of an existing PLC.

[0089] This constitutes the self-propelled deployable maintenance equipment for the railway cast-in-situ box girder provided by the present invention.

[0090] The present invention also provides a maintenance method for a railway cast-in-situ box girder, based on the self-propelled deployable maintenance equipment for a railway cast-in-situ box girder constructed by the above-mentioned scheme, and the maintenance method comprises:

[0091] S1: The primary folding and unfolding mechanism 410 of the deployable support system 400 rotates around the bridge deck support system 300 and changes from the primary deployment state to the spraying working state. The spraying system 200 sprays and maintains the concrete at the flange 12, web 13 and bottom plate 14 of the box girder 1 simultaneously along the primary folding and unfolding mechanism 410 and the secondary folding and unfolding mechanism 420. Figure 1 shown.

[0092] Specifically, the lifting device 343 extends in the matching groove 3421, generating a thrust on the side end pipe attachment 411. Based on the lever principle, the smaller thrust causes the side end pipe attachment 411 to rotate in the opposite direction to the outside of the box beam 1 in the rotating shaft connector 341 through the rotating shaft 4113, and drives the flange pipe attachment 412 and the secondary folding and unfolding mechanism 420 to rotate synchronously in the opposite direction to the outside of the box beam 1, so as to reduce the distance between the deployable support system 400 and the box beam 1, so that the primary folding and unfolding mechanism 410 and the secondary folding and unfolding mechanism 420 are respectively distributed corresponding to the flange 12, the web 13 and the bottom plate 14, thereby transforming the deployable support system 400 from the primary deployment state to the spraying operation state.

[0093] Furthermore, a pin shaft 3423 is inserted into the first limiting hole 3422 to limit the side end pipe attachment 411 so that the side end pipe attachment 411 stops rotating, thereby maintaining the spraying operation state of the deployable support system 400 to ensure that the spraying system 200 effectively sprays and maintains the concrete of the box girder 1.

[0094] At this time, the water pump 230 draws water from the external source, and the water in the spray pipe 210 is transported along the first-level folding and unfolding mechanism 410 and the second-level folding and unfolding mechanism 420, flowing to the flange 12, the web 13 and the bottom plate 14 respectively, and sprayed from the nozzle 220 on the concrete at the flange 12, the web 13 and the bottom plate 14, and spray curing is carried out simultaneously, thereby improving the curing effect.

[0095] S2: The self-propelled mechanism 100 drives the bridge deck support system 300, the sprinkler system 200 and the deployable support system 400 to move back and forth on the bridge deck 11 to complete the maintenance of the first beam segment.

[0096] S3: The primary folding and unfolding mechanism 410 of the deployable support system 400 rotates around the bridge deck support system 300, recovering from the spraying working state to the primary unfolding state, and the secondary folding and unfolding mechanism 410 rotates around the secondary folding and unfolding mechanism 410, changing from the primary unfolding state to the secondary unfolding state, providing passage space for the bridge piers.

[0097] Combine Figure 1 and Figure 5 Specifically, the pin shaft 3423 in the first limiting hole 3422 is pulled out, and the lifting device 343 slowly shrinks and is stored in the matching groove 3421, and no longer generates thrust on the side end pipeline attachment part 411. Due to the distribution structure of the primary folding and unfolding mechanism 410 and the secondary folding and unfolding mechanism 420 themselves, based on the action of gravity, the side end pipeline attachment part 411 rotates toward the outside of the box girder 1 in the rotating shaft connector 341 through the rotating shaft 4113, and drives the flange pipeline attachment part 412 and the secondary folding and unfolding mechanism 420 to rotate toward the outside of the box girder 1 synchronously, so as to increase the distance between the deployable support system 400 and the box girder 1, so that the primary folding and unfolding mechanism 410 and the secondary folding and unfolding mechanism 420 are no longer distributed corresponding to the flange 12, web 13 and bottom plate 14, and the deployable support system 400 is restored from the spraying operation state to the primary deployment state, and can move on the bridge deck 11 without colliding or interfering with the box girder 1.

[0098] Furthermore, a pin shaft 3423 is inserted into the second limiting hole 3424 to limit the side end pipeline attachment piece 411 so as to stop the side end pipeline attachment piece 411 from rotating, thereby maintaining the primary deployment state of the deployable stent system 400 .

[0099] Combine Figure 7Then, the control system drives the driving gear 432 to rotate in the first direction. The driving gear 432 drives the driven gear 432 to rotate synchronously in the first direction through the first transmission rod 434, so that the driven gear 432 drives the fixed gear 433 to rotate synchronously in the first direction through the second transmission rod 435, so that the web pipe attachment 421 and the bottom plate pipe attachment 422 rotate synchronously around the fixed gear 433 in the first direction to face the outside of the box girder 1, thereby increasing the distance between the secondary folding and unfolding mechanism 420 and the pier 2, and unfolding the secondary folding and unfolding mechanism 420, thereby realizing the secondary unfolding state of the deployable support system 400, providing space for the pier to pass, and the deployable support system 400 can smoothly pass through the pier and move to the next beam section.

[0100] S4: The self-propelled mechanism 100 drives the bridge deck support system 300, the sprinkler system 200 and the deployable support system 400 to synchronously move through the pier 2 to the second beam section for maintenance of the second beam section.

[0101] The present invention provides self-propelled deployable maintenance equipment and a maintenance method for a cast-in-place box girder of a railway. The primary and secondary folding and unfolding mechanisms of the deployable support system cooperate with the flange, web, and bottom plate of the box girder, respectively, so that spray pipelines are distributed in the primary and secondary folding and unfolding mechanisms. The concrete at the flange, web, and bottom plate of the box girder can be sprayed and maintained simultaneously, thereby comprehensively maintaining the box girder concrete and improving the maintenance effect. At the same time, the primary and secondary folding and unfolding mechanisms can rotate independently and cooperate with each other to achieve the secondary deployment of the deployable support system, thereby providing passage spaces for piers of different widths. This allows the maintenance equipment to move on the box girder through the piers and achieve maintenance of multiple beam sections, thereby improving maintenance efficiency and ensuring maintenance effect and reliability.

[0102] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-propelled deployable maintenance device for railway cast-in-situ box girders, which cooperates with the box girders and bridge piers and includes a self-propelled mechanism and a spraying system, characterized in that: It also includes the bridge deck support system, deployable bracket system and control system. The bridge deck support system is distributed along the width direction of the box girder and is respectively connected to the self-propelled mechanism, the spraying system and the deployable support system. The self-propelled mechanism is configured to drive the bridge deck support system, the spraying system and the deployable support system to move synchronously along the bridge deck. The deployable support system is respectively arranged at both ends of the bridge deck support system, and includes a primary folding and deploying mechanism and a secondary folding and deploying mechanism. The primary folding and deploying mechanism is connected to the bridge deck support system, and is used to cooperate with the flange of the box beam and can rotate around the bridge deck support system. The secondary folding and deploying mechanism is connected to the primary folding and deploying mechanism, and is used to cooperate with the web and bottom plate of the box beam and can rotate around the primary folding and deploying mechanism. The spray system includes spray pipelines, which are respectively distributed on the first-level folding and unfolding mechanism and the second-level folding and unfolding mechanism, and nozzles are evenly arranged on the spray pipelines. The control system is configured to control the working states of the self-propelled mechanism, the sprinkler system, the bridge deck support system and the deployable bracket system respectively.

2. The self-propelled deployable maintenance equipment for railway cast-in-situ box girders according to claim 1, characterized in that: The bridge deck support system includes main beams distributed along the width direction of the bridge deck. The self-propelled mechanism is respectively arranged at the two end areas of the main beams through the cooperation of transverse support members and longitudinal support members, and can move along the length direction of the bridge deck.

3. The self-propelled deployable maintenance equipment for railway cast-in-situ box girders according to claim 2, characterized in that: Both ends of the bridge deck support system are respectively provided with constraint components for cooperating with the deployable bracket system. The constraint components include a rotating shaft connector arranged at the end of the main beam, a fixing member distributed at an angle to the main beam, and a jacking device arranged in the fixing member. The end of the first-level folding and unfolding mechanism cooperates with the jacking device and is connected to the rotating shaft connector through a rotating shaft.

4. The self-propelled deployable maintenance equipment for railway cast-in-situ box girders according to claim 3, characterized in that: The primary folding and unfolding mechanism includes a side end pipeline attachment member distributed at the side end of the box beam for cooperating with the constraint assembly and a flange pipeline attachment member distributed below the flange.

5. The self-propelled deployable maintenance equipment for railway cast-in-situ box girders according to claim 4, characterized in that: The first-level folding and unfolding mechanism also includes a support reinforcement component. The side end pipeline attachment parts and the flange pipeline attachment parts are configured to be spatially staggered, and the two ends of the support reinforcement component are respectively connected to the side end pipeline attachment parts and the flange pipeline attachment parts.

6. The self-propelled deployable maintenance equipment for railway cast-in-situ box girders according to claim 4, characterized in that: The first end area of the side pipe attachment that cooperates with the constraint assembly is provided with a driving gear, and the second end is provided with a driven gear. The end of the flange pipe attachment that cooperates with the secondary folding and unfolding mechanism is provided with a fixed gear. The driving gear and the driven gear are linked to each other through a first transmission rod, and the driven gear and the fixed gear are linked to each other through a second transmission rod.

7. The self-propelled deployable maintenance equipment for railway cast-in-situ box girders according to claim 6, characterized in that: The secondary folding and unfolding mechanism includes a web pipe attachment distributed outside the web and a bottom plate pipe attachment distributed below the bottom plate. One end of the web pipe attachment is connected to the fixed gear, and the other end is connected to the bottom plate pipe attachment.

8. The self-propelled deployable maintenance equipment for railway cast-in-situ box girders according to claim 7, characterized in that: The spray system also includes a water pump arranged on the bridge deck. One end of the spray pipe is connected to the water pump, and the other end is distributed in the side end pipe attachment, flange pipe attachment, web pipe attachment and bottom plate pipe attachment in sequence.

9. A method for maintaining a railway cast-in-situ box girder, characterized in that: The self-propelled deployable maintenance equipment for the railway cast-in-situ box girder according to any one of claims 1 to 8, wherein the maintenance method comprises: The primary folding and unfolding mechanism of the deployable support system rotates around the bridge deck support system, changing from the primary deployment state to the spraying working state. The spraying system simultaneously sprays and maintains the concrete on the flange, web and bottom plate of the box girder along the primary and secondary folding and unfolding mechanisms. The self-propelled mechanism drives the bridge deck support system's spray system and deployable bracket system to move back and forth on the bridge deck, completing the maintenance of the first beam section; The first-level folding and unfolding mechanism of the deployable support system rotates around the bridge deck support system, returning from the spraying working state to the first-level unfolding state. The second-level folding and unfolding mechanism rotates around the first-level folding and unfolding mechanism, changing from the first-level unfolding state to the second-level unfolding state, providing passage space for the bridge piers. The self-propelled mechanism drives the bridge deck support system, sprinkler system and deployable bracket system to move synchronously through the pier to the second beam section for maintenance.

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