Device for cleaning operation of railway bridge tunnel

Abstract

The utility model provides a device for railway bridge tunnel cleaning operation, the device is connected with an excavator, the excavator pushes the device to carry out cleaning operation, the device comprises an excavating mechanism, a guide supporting mechanism, a rail lifting mechanism and a ballast discharging mechanism, the excavating mechanism is used for excavating railway ballasts; the guide supporting mechanism is connected to an excavator main support of the excavating mechanism and is used for assisting the device to run along a rail; the rail lifting mechanism is detachably connected to the excavator main support and used for transversely locking and lifting a rail so that rail lifting operation can be achieved, and the rail can freely move in the longitudinal direction. And the ballast discharging mechanism is connected with the excavating main support and is used for discharging railway ballasts. According to the technical scheme, the small-sized unitized mechanical screen cleaning machine can adapt to a narrow space, and small-sized unitized mechanical screen cleaning operation is achieved.

Description

Technical Field

[0001] This invention relates to the field of railway maintenance technology, specifically to a device for cleaning and screening operations in railway bridges and tunnels. Background Technology

[0002] my country currently has over 50,000 kilometers of railway bridges and tunnels, and a large number of railway tunnels are under construction or in the planning stage. Therefore, the maintenance and repair of railway and tunnel subgrades has become a top priority.

[0003] Large-scale track maintenance machinery is widely used for the maintenance and repair of ballasted tracks in the subgrade and some bridge sections of main railway lines in my country. Currently, existing track cleaning vehicles mainly include medium-sized track cleaning vehicles, large track cleaning vehicles, slope track cleaning vehicles, and turnout track cleaning vehicles, used for cleaning main lines and some turnout areas. Among them, the QS-450 track cleaning vehicle, which can be used for track cleaning, has a maximum and minimum digging width of 4200 mm and a working efficiency of 450 m / s. 3 / h; The QS-650 screen cleaning vehicle has a maximum and minimum digging width of 5030mm and 4030mm respectively, and an operating efficiency of 650m. 3 / h. For existing ballast-track bridges, the outer edge width of the ballast trough top surface of double-track railway bridges and single-track railway bridges built after 2005 is 4.9m, allowing for the use of existing ballast cleaning vehicles for cleaning operations, with no limitation on the width of the mechanical working surface. However, for bridges built before 2005, the outer edge width of the ballast trough top surface is only 3.9m, limiting the width of the mechanical working surface and making it impossible to use existing ballast cleaning vehicles for mechanized cleaning, relying mainly on manual labor. This results in a large number of maintenance workers, a complex workforce, difficulties in on-site management and personnel scheduling, and significant safety hazards due to the fact that many workplaces are located on bridges or in tunnels. Furthermore, manual cleaning often suffers from incomplete, uneven, and untimely work; for example, in severely compacted areas or during rain or snow, personnel cannot work promptly. Especially when conducting mechanized cleaning operations inside tunnels, limitations in ventilation, dust removal, and engine exhaust emissions create a harsh working environment, endangering the health of workers and becoming another bottleneck restricting mechanized maintenance.

[0004] Therefore, a technical solution is needed that can adapt to confined spaces and realize small-scale, modular mechanical screening operations. Summary of the Invention

[0005] The present invention aims to provide an apparatus for cleaning and screening operations in railway bridge tunnels, which can adapt to confined spaces and realize small-scale, modular mechanical cleaning and screening operations.

[0006] According to one aspect of the present invention, an apparatus for cleaning and screening operations in railway bridge tunnels is provided. The apparatus is connected to an excavator and is driven by the excavator to perform the cleaning and screening operation. The apparatus comprises: an excavating mechanism, a guiding support mechanism, a rail lifting mechanism, and a ballast removal mechanism.

[0007] The excavation mechanism is used for excavating ballast and includes: a rectangular guide frame, a total excavation support, and a connecting seat. The excavation mechanism is connected to the excavator through the connecting seat set on the total excavation support. The top of the guide frame is provided with a discharge port, and the inner circumference is provided with a rotatable excavation chain. The excavation mechanism excavates the ballast through the excavation chain and transports it to the discharge port.

[0008] The guide support mechanism is connected to the excavator's main support of the excavating mechanism to assist the device in running along the rails;

[0009] The rail lifting mechanism is detachably connected to the excavator's main support and is used to laterally lock and lift the rail to achieve the rail lifting operation, allowing the rail to move freely in the longitudinal direction.

[0010] The ballast removal mechanism is connected to the main excavation support and is used for ballast removal.

[0011] According to some embodiments, the digging mechanism further includes a main drive sprocket, a driven sprocket, and a drive motor. The main drive sprocket is located at two corners at the upper end of the guide frame, and the driven sprocket is located at two corners at the lower end of the guide frame. The drive motor is used to drive the main drive sprocket, thereby driving the digging chain and the driven sprocket.

[0012] According to some embodiments, the digging chain includes a ring chain composed of multiple links, with three layers of digging teeth arranged side by side on each link. After the digging chain excavates the ballast from the bottom of the sleeper, it works with the main drive sprocket, the driven sprocket, the drive motor, and the guide frame to transport the ballast to the discharge port.

[0013] According to some embodiments, the bottom of the guide frame is provided with a detachable excavation bottom beam.

[0014] According to some embodiments, the guide support mechanism includes a guide wheel and a support cantilever. The guide wheel is used to assist the device in running along the rail. The support cantilever is connected to the excavator's main support of the excavating mechanism and is used to support the guide support mechanism. The guide wheel and the support cantilever are connected by ball bearings, so that the guide wheel can rotate freely.

[0015] According to some embodiments, the guide support mechanism further includes an adjustment mechanism, the two ends of which are respectively connected to the main excavation support and the support cantilever, and the screening operation for excavation at different depths is achieved by adjusting the adjustment mechanism.

[0016] According to some embodiments, the rail lifting mechanism includes a roller clamp, a crossbeam, and a rail lifting cylinder. The crossbeam is detachably connected to the excavator's main support to support the rail lifting mechanism. The roller clamp is used to lock the rail, allowing the rail to move freely longitudinally. The rail lifting cylinder lifts the roller clamp to achieve the rail lifting operation.

[0017] According to some embodiments, the rail lifting mechanism further includes a lifting frame disposed below the crossbeam for supporting the roller clamp and the rail lifting cylinder.

[0018] According to some embodiments, the roller clamp is equipped with a safety device to prevent the rail from falling off the roller clamp.

[0019] According to some embodiments, the ballast discharge mechanism includes a receiving hopper and a support frame, the support frame being connected to the main excavation support, and the receiving hopper being fixed at a certain angle to the support frame, so that the ballast falls into the receiving hopper through the discharge port.

[0020] According to an embodiment of the present invention, by using a tracked excavator as a carrier and power source, the size and weight of the equipment are reduced, and the requirements for parking space are less restricted, making the equipment transportation more flexible and mobile. The excavator chassis is dual-purpose for both road and rail transport, enabling rapid entry and exit from tracks, shortening equipment scheduling time and improving construction efficiency. The rail lifting mechanism lifts the rails, and in conjunction with the rectangular guide frame, excavation chain, and ballast removal mechanism, efficient ballast cleaning and screening is achieved. The guide support mechanism assists the device to run smoothly along the rails, safely and efficiently realizing small-scale unitized cleaning and screening operations.

[0021] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0023] Figure 1 The diagram shows a guide support mechanism for a device used in cleaning and screening operations of railway bridge tunnels, according to an example embodiment.

[0024] Figure 2 The diagram shows a structural diagram of an apparatus for cleaning and screening operations in railway bridge tunnels according to an example embodiment.

[0025] Figure 3 The diagram shows a structural diagram of an apparatus for cleaning and screening operations in railway bridge tunnels according to an example embodiment.

[0026] Figure 4The diagram shows a connecting seat structure of an apparatus for cleaning and screening operations in railway bridge tunnels according to an example embodiment.

[0027] Figure 5 The diagram shows a digging chain structure of an apparatus for cleaning and screening operations in railway bridge tunnels according to an example embodiment.

[0028] Figure 6 The diagram shows a guide support mechanism for a device used in cleaning and screening operations of railway bridge tunnels, according to an example embodiment.

[0029] Figure 7 The diagram shows the connection between an apparatus and an excavator for screening operations on railway bridge tunnels according to an example embodiment. Detailed Implementation

[0030] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0031] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the invention. However, those skilled in the art will recognize that the technical solutions of the invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the invention.

[0032] It should be understood that although the terms first, second, third, etc., may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another. Therefore, the first component discussed below may be referred to as the second component without departing from the teachings of the present invention. As used herein, the term "and / or" includes all combinations of any one and more of the associated listed items.

[0033] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of exemplary embodiments, and the modules or processes in the drawings are not necessarily essential for implementing the present invention, and therefore cannot be used to limit the scope of protection of the present invention.

[0034] Currently, the construction organization scheme for railway or large bridge and tunnel cleaning equipment is generally based on group operations. Each group of mechanical cleaning equipment includes one railcar, at least three transport cars carrying different materials, a tunnel and bridge cleaning car, a tamping car, and a power stabilizing car—a series of mechanical devices, which are large and require a large parking space. Since the cleaning equipment can only be transported on railways, the railway timetable between the parking area and the construction site must be scheduled during construction to ensure no conflict with existing train formations on that line. Due to the difficulty of organization and scheduling, the overall application rate is currently low. When large bridge and tunnel cleaning car groups operate inside tunnels, multiple vehicles need to work together. Furthermore, the power sources for these vehicles are all high-power internal combustion engines, and the engines of multiple vehicles will produce a large amount of toxic gases. The operating speed of large bridge and tunnel cleaning cars is relatively slow (0-2 km / h), and due to the poor air circulation inside tunnels, toxic gases easily accumulate at the work site, which is detrimental to subsequent maintenance work.

[0035] Therefore, this invention proposes a device for cleaning and screening operations in railway bridges and tunnels, which can adapt to confined spaces and realize small-scale, unitized mechanical cleaning and screening operations. According to the embodiment, by using a tracked excavator as the carrier and power source, the size and weight of the equipment are reduced, and the requirements for parking space are less restrictive, making equipment transportation more flexible and mobile. The excavator chassis is dual-purpose for both road and rail transport, enabling rapid access to and from tracks, shortening equipment scheduling time and improving construction efficiency. The rail lifting mechanism raises the rails, and in conjunction with the rectangular guide frame, excavation chain, and ballast removal mechanism, efficient ballast cleaning and screening is achieved. The guide support mechanism assists the device in running smoothly along the rails, safely and efficiently realizing small-scale, unitized cleaning and screening operations.

[0036] Before describing the embodiments of the present invention, some terms or concepts involved in the embodiments of the present invention will be explained.

[0037] Ballast: This is a type of coarse gravel or crushed stone used for paving road or railway subgrades, primarily composed of high-grade granite. Ballast plays a crucial role in railway transportation systems, serving as the crushed stone to support track sleepers and is a common track bed structure. Before laying the tracks, a layer of crushed stone is laid on the subgrade, compacted, and then the sleepers and tracks are laid on top. The use of ballast distributes the weight of the train and tracks across the subgrade, thereby reducing vibration and noise from passing trains and improving passenger comfort.

[0038] Tracking window construction: This refers to the idle time reserved for railway maintenance and construction. Tracking window operation means that during the 24-hour uninterrupted railway timetable, no train running lines are laid or the number of train runs is reduced, which is the idle time reserved for railway maintenance and construction.

[0039] Entering and exiting the track: Entering the track refers to the process by which railway construction equipment enters the railway tracks from both sides of the railway and locks the track system so that it can travel along the railway. Exiting the track is the process by which construction equipment leaves the railway.

[0040] Drive sprocket: A wheel with interlocking chain teeth that drives the chain movement, directly or indirectly driven by a hydraulic motor or other power equipment, and is used to mesh with precisely pitched blocks on the link or cable.

[0041] A driven sprocket, also known as a trailing sprocket, is a toothed wheel that does not provide power or output torque and is driven by a chain. Its primary function is to support weight. The driven sprocket rotates by relying on the rotation of other drive sprockets. Because it does not directly provide power, it relies mainly on the rotation of the drive sprockets. Therefore, the driven sprocket rotates in the same direction as the drive sprocket, but it is passive, meaning it does not actively provide power.

[0042] Guide wheel: A wheel without a power output mechanism, with a protruding flange structure that can be locked inside the rail to guide the vehicle's movement on the rail.

[0043] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of the present invention.

[0044] Figure 1 The diagram shows a guide support mechanism for a device used in cleaning and screening operations of railway bridge tunnels, according to an example embodiment.

[0045] See Figure 1 The figure illustrates an apparatus for cleaning and screening railway bridge tunnels, based on an example embodiment. The apparatus is connected to an excavator and driven by the excavator to perform the cleaning and screening operation. The apparatus comprises an excavating mechanism, a guide support mechanism, a rail lifting mechanism, and a ballast removal mechanism. The excavating mechanism, used for excavating ballast, includes a rectangular guide frame 1, a main excavating support 9, and a connecting seat 7. The excavating mechanism is connected to the excavator via the connecting seat 7, which is mounted on the main excavating support 9. The guide frame 1 has a discharge port at its top and a rotating excavating chain around its inner circumference. The excavating mechanism excavates the ballast via the excavating chain and transports it to the discharge port. The guide support mechanism, connected to the main excavator support of the excavating mechanism, assists the apparatus in running along the railway track. The rail lifting mechanism is detachably connected to the main excavator support and is used to laterally lock and lift the rail, enabling the rail to move freely longitudinally. The ballast removal mechanism, connected to the main excavator support, is used for discharging the ballast.

[0046] According to some embodiments, the dual-purpose bridge and tunnel ballast cleaning device of the present invention consists of an excavation mechanism, a guide support mechanism, a rail lifting mechanism, and a ballast removal mechanism. By setting a connecting seat 7 in the excavation mechanism and connecting the connecting seat 7 to an excavator, the excavator travels on the track, driving the bridge and tunnel cleaning device to perform ballast cleaning operations on bridges and tunnels. The power and track access of this bridge and tunnel cleaning device rely on the excavator, allowing for flexible transfer, ample power, and high reliability. Compared with existing tunnel and bridge cleaning vehicles, this device has a simple structure, simplifies cumbersome procedures during operation, and is convenient and quick to load and unload. It can be transported by road flatbed trailers and does not need to be constantly running and parked on the railway line.

[0047] According to some embodiments, a tracked excavator is used as the carrier and power source. Through lightweight design, the size and weight of the device are reduced, and the requirements for parking space are less restricted, enabling small-scale, unitized mechanical screening operations. Moreover, since the excavator is suitable for both road and rail transport, it can quickly access railway tracks, shorten equipment scheduling time, improve construction efficiency, and is widely applicable in multiple screening operation scenarios, demonstrating flexibility, efficiency, and strong adaptability.

[0048] Figure 2 The diagram shows a structural diagram of an apparatus for cleaning and screening operations in railway bridge tunnels according to an example embodiment.

[0049] Figure 3 The diagram shows a structural diagram of an apparatus for cleaning and screening operations in railway bridge tunnels according to an example embodiment.

[0050] The figure shows a structural diagram of an apparatus for cleaning and screening operations in railway bridge tunnels, as illustrated in an example embodiment. (See also...) Figure 2 as well as Figure 3 The device includes a guide frame 1, a digging chain 2, a digging bottom beam 3, a guide wheel 4, an adjustment mechanism 5, a receiving hopper 6, a connecting seat 7, a rail lifting mechanism 8, a digging main support 9, a main drive sprocket 10, a crossbeam 11, a driven sprocket 12, a roller clamp 13, a lifting frame 14, and a rail lifting cylinder 15.

[0051] The digging mechanism also includes a main drive sprocket 10, a driven sprocket 12, and a drive motor. The main drive sprocket 10 is located at two corners at the upper end of the guide frame 1, and the driven sprocket 12 is located at two corners at the lower end of the guide frame 1. The drive motor is used to drive the main drive sprocket 10, thereby driving the digging chain 2 and the driven sprocket 12.

[0052] According to some embodiments, the guide frame 1 has a rectangular structure. The main drive sprocket 10 is fixed to the two upper corners of the guide frame 1, and the driven sprocket 12 is fixed to the two lower corners of the guide frame 1 to support the operation of the digging chain 2. The digging chain 2 is connected to the driven sprocket 12 and the main drive sprocket 10. The drive motor drives the main drive sprocket 10 to rotate, providing a power source for the entire digging system. Its power is transmitted to the main drive sprocket 10, and then drives the driven sprocket 12 through the digging chain 2, thereby realizing the digging and transportation of ballast. This ensures that the digging chain 2 can operate efficiently in a circular manner within the guide frame 1, while also ensuring the stability of the digging chain 2 and the continuity of the digging process.

[0053] Figure 4 The diagram shows a connecting seat structure of an apparatus for cleaning and screening operations in railway bridge tunnels according to an example embodiment.

[0054] The connecting seat 7 includes a base plate 704, two upright plates 701, a first reinforcing rib 702, a second reinforcing rib 703, two first sleeves 705, and four second sleeves 706. The four second sleeves are located at four holes on the inner side of the two upright plates, and the two first sleeves are located on the outer side of one of the two upright plates. The two upright plates are arranged opposite each other on both sides of the base plate, and the first and second reinforcing ribs are located between the two upright plates.

[0055] Figure 5 The diagram shows a digging chain structure of an apparatus for cleaning and screening operations in railway bridge tunnels according to an example embodiment.

[0056] See Figure 5 The figure shows a structural diagram of a digging chain 2 for a railway bridge tunnel cleaning and screening device according to an example embodiment. As shown in the figure, the digging chain 2 includes a ring chain composed of multiple chain links. Three layers of digging teeth 201 are arranged side by side on the chain links. After the digging chain 2 digs out the ballast at the bottom of the sleeper, it cooperates with the main drive sprocket 10, the driven sprocket 12, the drive motor and the guide frame 1 to transport the ballast to the discharge port.

[0057] According to some embodiments, the digging chain 2 is a ring structure composed of multiple links, which allows the digging chain 2 to circulate within a path inside the guide frame 1, thereby continuously performing digging operations. Each link has three layers of digging teeth arranged side by side, which can more effectively dig out ballast from the bottom of the sleeper, increase digging efficiency, and ensure that as much ballast as possible is dug out in each cycle.

[0058] According to some embodiments, the digging chain 2 operates under the drive of the main drive sprocket 10. When the digging chain 2 passes the bottom of the sleeper, the digging teeth dig up the ballast. As the digging chain 2 continues to move along the guide frame 1, the excavated ballast is transported to the discharge port at the top of the guide frame 1. This design enables the device to efficiently remove and transport ballast during the ballast cleaning operation, ensuring the smooth progress of the ballast cleaning operation in railway bridge tunnels.

[0059] According to some embodiments, the bottom of the guide frame 1 is provided with a detachable digging bottom beam 3. The digging bottom beam 3 improves the stability of the digging mechanism and provides better support for the entire device. Especially during digging, it ensures the correct running trajectory of the digging chain 2 within the guide frame 1, preventing deviations or instability during digging. The detachable design of the digging bottom beam 3 allows operators to install and adjust the equipment according to different working environments and needs. For example, at the start of the screening operation, the digging bottom beam 3 is first disassembled, then the rails are lifted, and finally the bottom beam is reinstalled. Alternatively, in some cases, worn bottom beams can be replaced, or they can be removed when no additional support is needed to reduce equipment weight, improve work efficiency, and thus ensure the quality and progress of the screening operation.

[0060] Figure 6 The diagram shows a guide support mechanism for a device used in cleaning and screening operations of railway bridge tunnels, according to an example embodiment.

[0061] See Figure 6 The figure shows a schematic diagram of a guide support mechanism for a device used in railway bridge and tunnel cleaning operations according to an example embodiment. As shown in the figure, the guide support mechanism includes a guide wheel 4 and a support cantilever. The guide wheel 4 is used to assist the device in running along the railway track. The support cantilever is connected to the excavator's main support of the excavating mechanism and is used to support the guide support mechanism. The guide wheel 4 and the support cantilever are connected by ball bearings, so that the guide wheel 4 can rotate freely.

[0062] According to some embodiments, the guide wheel 4 is mainly used to assist the entire screening device in running smoothly along the rails, allowing the device to move smoothly on the rails and reducing resistance and vibration caused by uneven rails. The support cantilever connects the guide wheel 4 to the excavator's main support of the excavating mechanism, and is hinged to the main excavator support, allowing for a certain range of swing to support the guide support mechanism and ensure the stability of the guide wheel 4. The guide wheel 4 is connected to the support cantilever via ball bearings, allowing for free rotation, thereby reducing friction when the device moves forward and improving the smoothness and efficiency of movement. This design ensures the stability and reliability of the device when performing screening operations, while also reducing the difficulty of operation and making the operation more efficient.

[0063] According to some embodiments, the guide support mechanism further includes an adjustment mechanism 5, the two ends of which are connected to the main excavation support 9 and the support cantilever, respectively, so that screening operations at different excavation depths can be achieved by adjusting the adjustment mechanism 5.

[0064] According to some embodiments, the two ends of the adjustment mechanism 5 are respectively connected to the main digging support and the support cantilever. By adjusting the lead screw and nut of the adjustment mechanism 5, different digging depths can be adjusted, so that the operator can adjust the digging depth according to the actual situation, meet the requirements of various screening operations, improve the efficiency and quality of operation, reduce the complexity of manual adjustment, and make the whole screening process more automated and controllable.

[0065] According to some embodiments, the rail lifting mechanism 8 includes a roller clamp 13, a crossbeam 11, a rail lifting cylinder 15, and a lifting frame 14. The crossbeam 11 is detachably connected to the excavator's main support and is used to support the rail lifting mechanism 8. The roller clamp 13 is used to lock the rail, allowing the rail to move freely longitudinally. The rail lifting cylinder 15 lifts the roller clamp 13 to achieve the rail lifting operation. The lifting frame 14 is located below the crossbeam 11 and is used to support the roller clamp 13 and the rail lifting cylinder 15.

[0066] According to some embodiments, the rail lifting mechanism 8 includes a lifting frame 14, a crossbeam 11, roller clamps 13, and a rail lifting cylinder 15. The crossbeam 11 is detachably connected to the excavation support 9 and the railway running gear of the dual-purpose road-rail excavator, allowing for connection during construction and disassembly for transportation. The lifting frame 14 is fixed below the crossbeam 11 and supports the roller clamps 13 and the rail lifting cylinder 15. The roller clamps use gravity to lock the rail and are equipped with a safety device to ensure that the rail will not fall off the roller clamps 13 and can move freely along the longitudinal direction of the rail. The rail lifting cylinder 15 lifts the roller clamps 13 to achieve the rail lifting operation. The roller clamps 13 are components used to lock the rail. Through their clamping action, the rail can be fixed in the vertical direction and moved freely in the longitudinal direction, ensuring that the rail will not undergo unnecessary displacement during the operation of the device.

[0067] According to some embodiments, the crossbeam 11, as a support structure, is detachably connected to the excavator's main support, providing a stable foundation for the entire rail-lifting mechanism 8 while supporting it. The detachable design of the crossbeam 11 makes the device easier to transport and store when not in use.

[0068] According to some embodiments, the rail-lifting cylinder 15 is a hydraulic component used to lift the roller clamp 13 together with the rail. Through the extension and retraction of the cylinder, the lifting height of the rail can be precisely controlled, thereby ensuring the effectiveness and safety of the screening operation. The lifting frame 14 is located below the crossbeam 11, ensuring that the roller clamp 13 and the rail-lifting cylinder 15 remain stable during operation, preventing safety hazards caused by uneven load. This allows the rail-lifting mechanism 8 to provide necessary support and control during the screening operation, ensuring that the rail can be accurately lifted to the required height, while guaranteeing the safety and efficiency of the screening operation.

[0069] According to some embodiments, the roller clamp is equipped with a safety device to prevent the rail from falling off the roller clamp 13, avoid accidents or damage that may be caused by the rail slipping, ensure the safety of the operators, reduce the probability of accidents, and ensure that the screening operation can be carried out smoothly.

[0070] According to some embodiments, the ballast discharge mechanism includes a receiving hopper 6 and a support frame. The support frame is connected to the main excavation support 9. The receiving hopper 6 is fixed to the support frame at a certain angle, so that the ballast falls into the receiving hopper 6 through the discharge port.

[0071] According to some embodiments, the ballast removal mechanism includes a receiving hopper 6 and a support frame. The receiving hopper 6 is fixed to the support frame, which is connected to the main excavation support 9. Ballast is transported via the guide frame 1 to the top discharge port and then falls into the receiving hopper 6. The receiving hopper 6 is at a certain angle along the longitudinal horizontal direction of the rail to facilitate ballast discharge. It is used in conjunction with an auxiliary receiving trolley for loading and transferring ballast. The receiving hopper 6 is used to receive ballast discharged from the discharge port of the excavation mechanism. Generally, it is designed with a certain angled slope to ensure that the ballast can smoothly slide into the receiving hopper 6 instead of accumulating near the discharge port, thus avoiding blockage. The support frame is connected to the main excavation support and provides stable support for the receiving hopper 6. This design makes the ballast removal process simple and efficient, reduces the need for operator intervention, and also ensures a clean and orderly work site.

[0072] Figure 7 The diagram shows the connection between an apparatus and an excavator for screening operations on railway bridge tunnels according to an example embodiment.

[0073] According to some embodiments, before the operation begins, the connecting seat of the device is connected to the connecting seat 7 of the excavator arm, and placed on the rail together with the excavator. The digging bottom beam 3 and the digging chain 2 are installed, and the rail is locked in the roller clamp 13. The position of the device is adjusted so that the excavator tracks ride on the rail. After the operation is completed, the rail lifting mechanism 8 is released, the digging bottom beam 3 and the digging chain 2 are disassembled, and the excavator lifts the device off the rail to complete the screening operation.

[0074] According to some embodiments, before the operation begins, an excavator or manual labor is used to dig out an appropriate distance from the location to be cleaned. After quickly connecting the device to the excavator arm's connecting seat 7, it is moved onto the rail together with the excavator, with the excavator tracks riding on the rail and the guide wheels 4 aligned with the rail. First, the excavating mechanism is installed, the bottom beam and bottom excavating chain 2 are removed, and the bottom beam of the device is placed 200-300mm below the sleepers, or the guide support mechanism is adjusted to an appropriate position according to the site construction conditions to select the cleaning depth. Then, the excavating chain 2 and the bottom beam are connected.

[0075] According to some embodiments, after the excavation mechanism is installed, the rail lifting mechanism 8 needs to be adjusted so that its roller clamp 13 can clamp the rail and move freely longitudinally. The rail lifting cylinder 15 is then operated to lift the rail to a certain height in order to reduce the cleaning resistance and improve the cleaning efficiency.

[0076] According to some embodiments, when the device is working, the digging chain 2 is driven by a drive motor, causing the digging chain 2 to rotate at high speed and dig out the ballast. The ballast is then lifted through the rising guide trough section of the guide trough frame 1 to the discharge port at the upper end of the guide trough frame 1. The ballast falls into the receiving hopper 6 through the discharge port and is stored and transported by a ballast transport vehicle that works in conjunction with it. The excavator is operated to slowly reverse, achieving continuous screening operations.

[0077] According to some embodiments, after the operation is completed, the lifting mechanism 8 is released, the bottom beam and digging chain 2 are disassembled, and the device is lifted by an excavator and driven off the track, thus completing the operation.

[0078] According to some embodiments, the guide trough frame in this design is a rectangular structure, with two drive sprockets configured at the upper end, driven by two hydraulic motors respectively. The two drive sprockets provide ample power and high operating efficiency.

[0079] According to some embodiments, the drive of the digging chain 2 can be adjusted according to actual conditions in this design. For example, one hydraulic motor can be used for driving, and the other three can be driven by sprockets, thereby adapting to the digging depth required by different screening scenarios. Similarly, to adapt to different screening scenario requirements, the guide frame can be designed as a triangular structure with one drive sprocket at the top and two driven sprockets symmetrically arranged at the bottom, thereby further meeting the requirements for operation in confined spaces. Similarly, the guide frame 1 can also be designed as a polygonal structure, driven by one or two hydraulic motors, to meet various screening operations in different actual scenarios.

[0080] According to some embodiments, in this design, the guide support mechanism can be adjusted by a lead screw. When adjustment is needed, the nut is manually adjusted to the appropriate position and then locked. Alternatively, the guide support mechanism can be adjusted using a hydraulic cylinder or a rack and pinion mechanism, relying on hydraulic, electric, or pneumatic power to achieve automatic adjustment.

[0081] According to some embodiments, this design includes a set of guide support mechanisms located on the outside of the guide groove frame, with the inner side supported and positioned by the excavator arm. Depending on the actual application scenario, this design can be adjusted to include two sets of guide support mechanisms, located on the inner and outer sides of the guide groove frame respectively, to support the entire device. The excavator only provides power and does not provide support.

[0082] According to some embodiments, in this design, the roller clamp of the rail lifting mechanism is a gravity-locked structure. During use, manual operation is required to place the rollers on both sides of the rail and lock the safety device, then the rail is lifted using a hydraulic cylinder. Alternatively, depending on the actual scenario, a hydraulic cylinder or a rack and pinion mechanism can be used to achieve automatic clamping and release of the roller clamp via hydraulic, electric, or pneumatic methods.

[0083] According to some embodiments, this design utilizes a tracked excavator as the carrier and power source to achieve small-scale, unitized mechanical screening operations. This design reduces the size and weight of the equipment through lightweight design, minimizing restrictions on parking space. Because the chassis is a dual-purpose road-rail excavator, it allows for rapid access to and from tracks, shortening equipment scheduling time and improving construction efficiency.

[0084] According to some embodiments, in this design, the device can be transported by road vehicle, and can be transported to the designated construction site in advance before construction begins, making equipment deployment more flexible and mobile. In this design, the device is not limited by site conditions and can be parked in any permitted location without requiring a dedicated railway line. Depending on the frequency of railway train operations, the length of railway construction windows varies. For shorter construction windows, the device can be transported to the designated area in advance for quick track access, saving time.

[0085] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0086] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0087] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0088] Exemplary embodiments of the present invention have been specifically shown and described above. It should be understood that the present invention is not limited to the detailed structures, arrangements, or implementations described herein; rather, the present invention is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended provisions.

Claims

1. A device for railway bridge tunnel ballast cleaning operations, characterized in that, The device is connected to the excavator, and the device is pushed by the excavator to perform the cleaning operation, the device comprises a digging mechanism, a guide support mechanism, a rail lifting mechanism and a ballast discharging mechanism, The digging mechanism is used for digging ballast, comprising a rectangular guide groove frame, a digging main support and a connecting seat, the digging mechanism is connected to the excavator through the connecting seat arranged on the digging main support, a discharge port is arranged at the top of the guide groove frame, and a rotatable digging chain is arranged around the inner wall, the digging mechanism digs ballast through the digging chain and transports the ballast to the discharge port. The guide support mechanism is connected to the excavator main support of the digging mechanism to assist the device to run along the rail. The rail lifting mechanism is detachably connected to the excavator main support, which is used for transversely locking and lifting the rail to realize the rail lifting operation, so that the rail can move freely in the longitudinal direction. The ballast discharging mechanism is connected to the digging main support for discharging ballast.

2. The apparatus of claim 1, wherein, The digging mechanism further comprises a main drive sprocket, a slave sprocket and a drive motor, the main drive sprocket is arranged at two corners of the upper end of the guide groove frame, the slave sprocket is arranged at two corners of the lower end of the guide groove frame, and the drive motor is used to drive the main drive sprocket, thereby driving the digging chain and the slave sprocket.

3. The apparatus of claim 2, wherein, The digging chain comprises a ring chain composed of a plurality of chain links, three layers of digging teeth are arranged side by side on the chain link, and the digging chain cooperates with the main drive sprocket, the slave sprocket, the drive motor and the guide groove frame to transport the ballast on the rail tie bottom to the discharge port after the ballast is dug out.

4. The apparatus of claim 1, wherein, The bottom of the guide groove frame is provided with a detachable digging bottom beam.

5. The apparatus of claim 1, wherein, The guide support mechanism comprises a guide wheel and a support cantilever, the guide wheel is used to assist the device to run along the rail, the support cantilever is connected to the excavator main support of the digging mechanism to support the guide support mechanism, and the guide wheel and the support cantilever are connected through a ball bearing to enable the guide wheel to rotate freely.

6. The apparatus of claim 5, wherein, The guide support mechanism further comprises an adjusting mechanism, two ends of the adjusting mechanism are respectively connected to the digging main support and the support cantilever, and the adjusting mechanism is used to realize the cleaning operation of different depths.

7. The apparatus of claim 1, wherein, The rail lifting mechanism comprises a roller clamp, a cross beam and a rail lifting oil cylinder, the cross beam is detachably connected to the excavator main support to support the rail lifting mechanism, the roller clamp is used to lock the rail to enable the rail to move freely in the longitudinal direction, and the rail lifting oil cylinder lifts the roller clamp to realize the rail lifting operation.

8. The apparatus of claim 7, wherein, The rail lifting mechanism further comprises a lifting frame arranged below the cross beam to support the roller clamp and the rail lifting oil cylinder.

9. The apparatus of claim 7, wherein, The roller clamp is provided with a safety device to prevent the rail from falling off the roller clamp.

10. The apparatus of claim 1, wherein, The ballast discharging mechanism comprises a receiving hopper and a support frame, the support frame is connected to the digging main support, and the receiving hopper is fixed on the support frame at a certain angle, so that the ballast falls into the receiving hopper through the discharge port.

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