Screen cleaning machine

Abstract

The invention discloses a screen scarifier, and relates to the technical field of screen scarifiers, and the screen scarifier comprises a lower vehicle assembly, an upper vehicle assembly, a working device, a hydraulic control system, a protection system and a working accessory. The lower vehicle assembly comprises a crawler chassis system and a track wheel system; the upper vehicle assembly is used for rotating around the central axis of the crawler chassis system relative to the crawler chassis system; the working device comprises a working arm frame and an accessory quick-changing mechanism; the hydraulic control system is used for controlling the upper vehicle assembly, the lower vehicle assembly and the working device to work; the protection system comprises a rotation limiting device and a height limiting device, the rotation limiting device is used for limiting the rotation angle of the upper vehicle assembly, and the height limiting device is used for limiting lifting of the working arm frame; and the working accessory is arranged on the accessory quick-change mechanism and is used for executing corresponding operation. The screen scarifier solves the technical problems that a traditional screen scarifier refitted based on an excavator platform is poor in universality and cannot adapt to various working conditions of railway maintenance operation, so that the number of working faults is large, the working efficiency is low, and potential safety hazards exist.

Description

Technical Field

[0001] The present application relates to the technical field of screen cleaning machines, and in particular to a screen cleaning machine. Background Art

[0002] At present, in order to facilitate maintenance operations such as replacement of railway sleepers, replacement of turnout ballast, line tamping, mud and slurry remediation, and repair of tree branches invading the line, multifunctional small maintenance equipment is generally used for railway maintenance operations to reduce labor and improve work efficiency.

[0003] In the related technology, maintenance equipment is often a patchwork modification of existing small excavators with high-power engines and corresponding hydraulic systems to barely achieve railway maintenance operations such as cleaning and rail grinding. However, the traditional cleaning machine modified from the excavator platform has poor versatility and cannot adapt to various working conditions of railway maintenance operations, resulting in many work failures, low work efficiency, and safety hazards. Summary of the invention

[0004] The purpose of this application is to provide a screening machine that solves the technical problems that traditional screening machines modified from excavator platforms have poor versatility and cannot adapt to various working conditions of railway maintenance operations, resulting in many working failures, low working efficiency and potential safety hazards.

[0005] To achieve the above object, the present application provides a screening machine, comprising:

[0006] An alighting assembly, the alighting assembly comprising a crawler chassis system and a track wheel system, the track wheel system being arranged on the crawler chassis system, and the track wheel system being used to work on tracks;

[0007] A superstructure assembly is rotatably mounted on the crawler chassis system and is used to rotate relative to the crawler chassis system around a central axis of the crawler chassis system;

[0008] A working device connected to the upper vehicle assembly, the working device comprising a working boom and an attachment quick-change mechanism provided on the working boom;

[0009] A hydraulic control system connected to the upper vehicle assembly, the lower vehicle assembly and the working device, and used to control the upper vehicle assembly, the lower vehicle assembly and the working device to work;

[0010] A protection system, the protection system comprising a rotation limit device and a height limit device, the rotation limit device is used to limit the rotation angle of the upper vehicle assembly within a set range, and the height limit device is connected to the working boom to limit the lifting of the working boom;

[0011] The working attachment is detachably connected to the attachment quick-change mechanism and is used to perform corresponding operations.

[0012] In some embodiments, the lower vehicle assembly further comprises a slewing drive assembly and a central slewing joint, wherein the slewing drive assembly is connected to the central slewing joint, and the central slewing joint is connected to the slewing platform of the upper vehicle assembly to drive the upper vehicle assembly to rotate;

[0013] The rotation limit device includes an encoder, which is arranged on the central rotation joint and is used to detect the rotation angle of the upper vehicle assembly;

[0014] The screening machine also includes a control system, which is communicatively connected to the encoder and the rotary drive assembly, and is used to control the rotary drive assembly to stop driving the upper car assembly to rotate when the rotary angle detected by the encoder deviates from a set range.

[0015] In some embodiments, the rotation limiting device further includes:

[0016] Two right slewing limit seats are arranged oppositely on a first circumferential line on the crawler chassis system;

[0017] Two left slewing limit seats are arranged oppositely on a second circumferential line on the crawler chassis system;

[0018] A limit rod is switchably connected to the first socket and the second socket of the rotating platform. When the limit rod is inserted into the first socket, the limit rod is used to rotate between the two right rotating limit seats so that the boarding assembly can operate within a preset range on the left side. When the limit rod is inserted into the second socket, the limit rod is used to rotate between the two left rotating limit seats so that the boarding assembly can operate within a preset range on the right side.

[0019] In some embodiments, the height limiting device includes a height limiting detection component, which is communicatively connected to the control system, and the height limiting detection component is used to detect the lifting height of the working boom, so that the control system limits the lifting of the working boom when the lifting height of the working boom exceeds a limited height.

[0020] In some embodiments, the height limiting device further includes a height limiting rope, wherein the height limiting rope is connected between the height limiting detection member and the working boom, and the height limiting rope is used to limit the lifting of the working boom.

[0021] In some embodiments, the get-off assembly further includes a speed measuring component, which is disposed on the track wheel system to detect the travel speed of the track wheel system, and the speed measuring component includes:

[0022] A speed sensing plate, arranged on the driving wheel of the track wheel system;

[0023] The rotation speed sensor cooperates with the rotation speed sensing sheet to detect the rotation speed of the driving wheel.

[0024] In some embodiments, the protection system further includes an anti-electricity device, which is disposed on the working boom and is used to prevent the working boom from accidentally touching a high-voltage line.

[0025] In some embodiments, the hydraulic control system comprises:

[0026] A multi-valve control group, the multi-valve control group includes a ballast removal valve group and an excavation valve group assembly, the ballast removal valve group is used to control the opening and closing of the ballast removal power element, and the excavation valve group assembly is used to control the opening and closing of the excavation power assembly;

[0027] A first pump connected to the ballast removal valve via a first oil supply channel;

[0028] a second pump connected to the excavation valve coupling assembly through a second oil supply passage;

[0029] a cut-off valve, provided at the confluence point of the first oil supply passage and the second oil supply passage, for controlling the connection and cut-off of the first oil supply passage and the second oil supply passage; when the cut-off valve cuts off the first oil supply passage and the second oil supply passage, the first pump supplies oil to the ballast removal valve assembly through the first oil supply passage, and the second pump supplies oil to the excavation valve assembly through the second oil supply passage; when the cut-off valve connects the first oil supply passage and the second oil supply passage, the first pump and the second pump join together to supply oil to the excavation valve assembly;

[0030] The solenoid valve is configured to control the cut-off valve to cut off the first oil supply channel and the second oil supply channel when powered, and to control the cut-off valve to connect the first oil supply channel and the second oil supply channel when powered off.

[0031] In some embodiments, the hydraulic control system further comprises:

[0032] A multi-way valve, wherein the multi-way valve comprises a ballast discharge valve link, and the ballast discharge valve link is used to be connected to a ballast discharge power element through a ballast discharge oil circuit to control the opening and closing of the ballast discharge power element;

[0033] The third pump is connected to the multi-way valve through a third oil supply channel, and is used to supply oil to the ballast discharge valve through the third oil supply channel to control the ballast discharge power element to perform ballast discharge action.

[0034] In some embodiments, the cleaning machine further includes an emergency rescue system, and the emergency rescue system includes:

[0035] An emergency pump, connected to the multi-control valve group through a hydraulic oil circuit, for generating hydraulic power when the first pump and the second pump fail;

[0036] The emergency engine is connected to the emergency pump through a coupling and is used to output power to the emergency pump.

[0037] Compared with the above-mentioned background technology, the screening machine provided in the embodiment of the present application includes an undercarriage assembly, an upper car assembly, a working device, a hydraulic control system, a protection system and working accessories. Among them, the lower vehicle assembly includes a track chassis system and a track wheel system, the track wheel system is arranged on the track chassis system, and the track wheel system is used to work on the track; the upper vehicle assembly is rotatably arranged on the track chassis system, and the upper vehicle assembly is used to rotate relative to the track chassis system around the central axis of the track chassis system; the working device is connected to the upper vehicle assembly, and the working device includes a working boom and an attachment quick-change mechanism arranged on the working boom; the hydraulic control system is connected to the upper vehicle assembly, the lower vehicle assembly and the working device, and the hydraulic control system is used to control the operation of the upper vehicle assembly, the lower vehicle assembly and the working device; the protection system includes a slewing limit device and a height limiting device, the slewing limit device is used to limit the slewing angle of the upper vehicle assembly within a set range, and the height limiting device is connected to the working boom to limit the lifting of the working boom; the working attachments are detachably connected to the attachment quick-change mechanism, and the working attachments are used to perform corresponding operations.

[0038] The beneficial effects of the screen cleaning machine thus arranged mainly include:

[0039] First, the undercarriage assembly includes a crawler chassis system and a track wheel system, wherein the crawler chassis system can work normally under non-track conditions, while the track wheel system can work under railway track conditions, so that the cleaning machine can work under both road and railway conditions;

[0040] Secondly, the upper vehicle assembly is rotatably arranged on the crawler chassis system, and the working device can rotate with the upper vehicle assembly relative to the crawler chassis system, so as to operate in a wider range;

[0041] Thirdly, the working device includes a working boom and a quick-change mechanism for accessories, so that the working accessories can be quickly replaced according to the actual operation needs. The working accessories can be cleaning accessories, rail grinding accessories or buckets to achieve ballast stripping, ballast removal, cleaning, grinding and repairing of worn rails and excavator functions;

[0042] Fourthly, the hydraulic control system and the mechanical structure have good compatibility, which can solve the problems of hydraulic system rushing flow and frequent working failures during cleaning and screening operations;

[0043] Fifth, the protection system includes a slewing limit device and a height limiting device. The slewing limit device is used to limit the slewing angle of the upper vehicle assembly within a set range to prevent the upper vehicle assembly from crossing the center line of the railway track during railway construction, thereby achieving safety limitation. At the same time, the height limiting device avoids the occurrence of working arm top-impact failures, thereby achieving avoidance of high-voltage lines above the track during railway construction.

[0044] In summary, the screening machine provided in the embodiment of the present application solves the technical problems that the traditional screening machine modified based on the excavator platform has poor versatility and cannot adapt to various working conditions of railway maintenance operations, resulting in many working failures, low working efficiency and safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0046] FIG1 is a schematic diagram of the overall structure of a screen cleaning machine in an embodiment of the present application;

[0047] FIG2 is a front view of the lower car assembly of the cleaning machine shown in FIG1 ;

[0048] FIG3 is a top view of the upper car assembly in the cleaning machine shown in FIG1 ;

[0049] FIG4 is a schematic diagram of the structure of the hydraulic control system in the screen cleaning machine shown in FIG1 ;

[0050] FIG5 is a schematic structural diagram of an emergency rescue system in the cleaning machine shown in FIG1 ;

[0051] FIG6 is a schematic diagram of the assembly of the working device and the protection system of the screen cleaning machine shown in FIG1 ;

[0052] FIG7 is a schematic diagram of the structure of a rotation limit device in the protection system shown in FIG6;

[0053] FIG. 8 is a schematic diagram of the assembly of the attachment quick-change mechanism and the working attachments in the screen cleaning machine shown in FIG. 1 .

[0054] in:

[0055] 1. Undercarriage assembly; 1-1. Track chassis system; 1-2. Track wheel system; 1-3. Speed ​​sensor; 1-4. Speed ​​sensor;

[0056] 2. Upper vehicle assembly; 2-1. Power system; 2-2. Fluid supply system; 2-3. Cooling system; 2-4. Safety cab with micro-pressurization;

[0057] 3. Hydraulic control system; 3-1. First pump; 3-2. Second pump; 3-3. Third pump; 3-4. Multi-control valve group; 3-5. Multi-way valve; 3-6. Cut-off valve; 3-7. Ballast removal valve group; 3-8. Solenoid valve;

[0058] 4. Emergency rescue system; 4-1. Emergency engine; 4-2. Coupling; 4-3. Emergency pump;

[0059] 5. Working device; 5-1. Attachment quick-change mechanism; 5-2. Working boom;

[0060] 6. Protection system; 6-1. One-button emergency stop system; 6-2. Rotation limit device; 6-2-1. Right rotation limit seat; 6-2-2. Left rotation limit seat; 6-2-3. Limit rod; 6-2-4. Encoder; 6-3. Height limit device; 6-4. Anti-electric device;

[0061] 7. Working accessories; 7-1. Accessory shaft; 7-2. Accessory body. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0063] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0064] It should be noted that the directional words such as "upper end, lower end, left side, right side" described below are all defined based on the drawings in the specification.

[0065] Please refer to Figures 1 to 8, Figure 1 is a schematic diagram of the overall structure of the screening machine in the embodiment of the present application; Figure 2 is a front view of the lower car assembly in the screening machine shown in Figure 1; Figure 3 is a top view of the upper car assembly in the screening machine shown in Figure 1; Figure 4 is a structural schematic diagram of the hydraulic control system in the screening machine shown in Figure 1; Figure 5 is a structural schematic diagram of the emergency rescue system in the screening machine shown in Figure 1; Figure 6 is an assembly schematic diagram of the working device and the protection system in the screening machine shown in Figure 1; Figure 7 is a structural schematic diagram of the slewing limit device in the protection system shown in Figure 6; Figure 8 is an assembly schematic diagram of the attachment quick-change mechanism and the working attachments in the screening machine shown in Figure 1.

[0066] The screening machine provided in the embodiment of the present application includes a lower vehicle assembly 1, an upper vehicle assembly 2, a working device 5, a hydraulic control system 3, a protection system 6 and working accessories 7.

[0067] The undercarriage assembly 1 includes a crawler chassis system 1-1 and a track wheel system 1-2. The track wheel system 1-2 is arranged on the crawler chassis system 1-1. The crawler chassis system 1-1 can work normally under non-track conditions, and the track wheel system 1-2 is used to work on railway tracks.

[0068] The track wheel system 1-2 includes track wheel axles arranged on both sides of the vehicle body in the forward direction, and track wheels are arranged at both ends of any track wheel axle in the width direction of the vehicle body, and a pair of track wheels are used to adapt to two rails of the railway, so that the track wheel system 1-2 can run along the railway track. In addition, in order to facilitate the falling of the track wheel axle, two hydraulic cylinders can be arranged between the track wheel axle and the crawler chassis system 1-1, and the extension movement of the two hydraulic cylinders is used to make the track wheel axles on both sides rotate downward until they can run along the railway track.

[0069] The upper vehicle assembly 2 is rotatably disposed on the crawler chassis system 1 - 1 , and the upper vehicle assembly 2 is used to rotate relative to the crawler chassis system 1 - 1 around the central axis of the crawler chassis system 1 - 1 .

[0070] The working device 5 is connected to the upper vehicle assembly 2, and includes a working boom 5-2 and an attachment quick-change mechanism 5-1 disposed on the working boom 5-2. The working boom 5-2 can be a three-section boom, which can flexibly control the construction height of the whole machine in the bridge and tunnel section. The configured attachment quick-change mechanism 5-1 can flexibly replace the working attachment 7, realizing the multi-function of the whole machine.

[0071] The hydraulic control system 3 is connected to the upper vehicle assembly 2 , the lower vehicle assembly 1 and the working device 5 , and the hydraulic control system 3 is used to control the operation of the upper vehicle assembly 2 , the lower vehicle assembly 1 and the working device 5 .

[0072] The protection system 6 includes a rotation limit device 6-2 and a height limit device 6-3. The rotation limit device 6-2 is used to limit the rotation angle of the upper vehicle assembly 2 within a set range. The height limit device 6-3 is connected to the working boom 5-2 to limit the lifting of the working boom 5-2.

[0073] The working attachment 7 is detachably connected to the attachment quick-change mechanism 5 - 1 , and the working attachment 7 is used to perform corresponding operations.

[0074] The beneficial effects of the screen cleaning machine thus arranged mainly include:

[0075] First, the undercarriage assembly 1 includes a crawler chassis system 1-1 and a track wheel system 1-2, wherein the crawler chassis system 1-1 can work normally under non-track conditions, and the track wheel system 1-2 can work under railway track conditions, so that the cleaning machine can work under both road and railway conditions;

[0076] Secondly, the upper vehicle assembly 2 is rotatably arranged on the crawler chassis system 1-1, and the working device 5 can rotate with the upper vehicle assembly 2 relative to the crawler chassis system 1-1, so as to operate in a wider range;

[0077] Thirdly, the working device 5 includes a working arm 5-2 and an attachment quick-change mechanism 5-1, so that the working attachment 7 can be quickly replaced according to the actual operation needs. The working attachment 7 can be a cleaning attachment, a guide rail grinding attachment or a bucket to realize ballast stripping, ballast removal, cleaning, grinding and shaping of worn guide rails and excavator functions;

[0078] Fourthly, the hydraulic control system 3 has good compatibility with the mechanical structure, which can solve the problems of hydraulic system rushing flow and frequent working failures during cleaning operation;

[0079] Fifth, the protection system 6 includes a slewing limit device 6-2 and a height limiting device 6-3. The slewing limit device 6-2 is used to limit the slewing angle of the upper vehicle assembly 2 within a set range to prevent the upper vehicle assembly 2 from crossing the center line of the railway track during railway construction, thereby achieving safety limitation. At the same time, the height limiting device 6-3 prevents the working arm from hitting the top and achieves avoidance of high-voltage lines above the track during railway construction.

[0080] In summary, the screening machine provided in the embodiment of the present application solves the technical problems that the traditional screening machine modified based on the excavator platform has poor versatility and cannot adapt to various working conditions of railway maintenance operations, resulting in many working failures, low working efficiency and safety hazards.

[0081] In some embodiments, the get-off assembly 1 further includes a speed measuring component, which is disposed on the track wheel system 1 - 2 to detect the traveling speed of the track wheel system 1 - 2 .

[0082] In this embodiment, the speed measuring component includes a speed sensing sheet 1-3 and a speed sensor 1-4. The speed sensing sheet 1-3 is arranged on the driving wheel of the track wheel system 1-2; the speed sensor 1-4 cooperates with the speed sensing sheet 1-3 to detect the speed of the driving wheel.

[0083] In this way, a speed sensing plate 1-3 and a speed sensor 1-4 are installed on the driving wheel of the track wheel. The speed sensor 1-4 cooperates with the speed sensing plate 1-3 to calculate the distance the driving wheel has traveled by the number of swept gear teeth, thereby determining the speed of the wheel. In this way, the walking speed of the track wheel during grinding the guide rail can be detected as needed and accurately adjusted to prevent the walking speed from being too fast resulting in insufficient grinding and the walking speed from being too slow resulting in excessive grinding.

[0084] Of course, the encoder can also be used to measure the rotation speed of the track wheel.

[0085] The track wheel system 1-2 provided in the present application has an automatic speed measurement function and a constant speed cruising function, and can adjust the speed to ensure that the guide rail grinding working condition moves at a constant and stable speed.

[0086] In some embodiments, the vehicle assembly 2 includes a fluid supply system 2-2 (specifically a multi-pump fluid supply system), a high-power power system 2-1 (specifically a high-power power system), an independent cooling system 2-3, and a micro-pressurized safety cab 2-4.

[0087] In this embodiment, the high-power power system 2-1 is specially designed to meet the high-power configuration required for railway track cleaning and guide rail grinding; the multi-pump fluid supply system 2-2 takes into account the shape of the whole machine and the flow requirements of the working arm under cleaning conditions, and adopts a three-pump system, specifically dual main pumps plus an auxiliary pump. Each working condition is controlled separately to avoid the flow rush phenomenon caused by uneven flow distribution between actions during operation; the configured independent cooling system 2-3 changes the structure of the engine directly connected to the radiator to the form of a hydraulic motor directly connected to the radiator, which can ensure that the whole machine is in a good thermal balance power coefficient; the safety cab 2-4 with micro-boosting can be normally and safely constructed in plateau areas.

[0088] In some embodiments, the hydraulic control system 3 includes a multi-control valve group 3-4 (also called a nine-way multi-valve), a first pump 3-1, a second pump 3-2, a shut-off valve 3-6 and a solenoid valve 3-8.

[0089] Among them, the multi-control valve group 3-4 includes a ballast-removing valve unit 3-7 and an excavation valve unit assembly. The ballast-removing valve unit 3-7 is used to control the opening and closing of the ballast-removing power element (specifically, the ballast-removing pump), and the excavation valve unit assembly is used to control the opening and closing of the excavation power assembly (used to perform adjustment actions such as walking, boom, dipper and bucket); the first pump 3-1 is connected to the ballast-removing valve unit 3-7 through the first oil supply channel; the second pump 3-2 is connected to the excavation valve unit assembly through the second oil supply channel; the shut-off valve 3-6 is arranged at the confluence of the first oil supply channel and the second oil supply channel, and the shut-off valve 3-6 is used to control the first oil supply channel and the second oil supply channel. The channels are connected and cut off. When the shut-off valve 3-6 cuts off the first oil supply channel and the second oil supply channel, the first pump 3-1 supplies oil to the ballast valve connection 3-7 through the first oil supply channel, and the second pump 3-2 supplies oil to the excavation valve connection assembly through the second oil supply channel. When the shut-off valve 3-6 connects the first oil supply channel and the second oil supply channel, the first pump 3-1 and the second pump 3-2 combine to supply oil to the excavation valve connection assembly. The solenoid valve 3-8 is configured to control the shut-off valve 3-6 to cut off the first oil supply channel and the second oil supply channel when energized, and to control the shut-off valve 3-6 to connect the first oil supply channel and the second oil supply channel when power is lost.

[0090] In addition, the hydraulic control system 3 also includes a multi-way valve 3-5 and a third pump 3-3. The multi-way valve 3-5 includes a ballast discharge valve link, which is used to connect with the ballast discharge power element (specifically, the ballast discharge pump) through the ballast discharge oil circuit to control the opening and closing of the ballast discharge power element; the third pump 3-3 is connected to the multi-way valve 3-5 through the third oil supply channel, and the third pump 3-3 is used to supply oil to the ballast discharge valve link through the third oil supply channel to control the ballast discharge power element to perform the ballast discharge action.

[0091] It should be emphasized that the hydraulic control system 3 adopts a load-sensitive pump and a power-divided control system. The adjustment actions of the screen cleaning machine such as walking, boom, dipper arm and bucket and the power unit and hydraulic pump for ballast removal and ballast discharge are controlled separately, and will not affect each other and cause flow rush. Moreover, when the excavator is working, the two hydraulic main pumps can merge to control the excavator's movements, and the other main pump can operate in low-pressure standby mode.

[0092] When performing ballast milling / ballast unloading operations:

[0093] The solenoid valve 3-8 is energized to provide pilot pressure oil to control the action of the cut-off valve 3-6, thereby cutting off the connection channel between the first pump 3-1 and the second pump 3-2, that is, cutting off the first oil supply channel and the second oil supply channel. As a result, the first pump 3-1 supplies oil to the ballast removal valve link 3-7 through the first oil supply channel to control the ballast removal action, and the second pump 3-2 supplies oil to the walking, rotation, boom, dipper arm, bucket and other excavator actions through the second oil supply channel.

[0094] When the ballast discharge valve link of the multi-way valve 3-5 (specifically a triple multi-way valve) is working, the third pump 3-3 supplies oil to the ballast discharge valve link through the third oil supply channel to control the ballast discharge power element to perform ballast discharge action.

[0095] That is to say, when the ballast removal valve 3-7 works, it sends a signal to the cut-off valve 3-6, cutting off the connection between the first pump 3-1 and the second pump 3-2, so that the first pump 3-1 supplies oil to the ballast removal action, and the second pump 3-2 supplies oil to the excavation adjustment actions such as walking, rotation, boom, dipper, two arms and bucket, so as to achieve the purpose that the adjustment actions such as ballast removal and walking do not interfere with each other. When the ballast removal valve of the multi-way valve 3-5 works, the load-sensitive system immediately feeds back the hydraulic oil of the corresponding flow and pressure output by the third pump 3-3 and supplies it to the ballast removal valve to control the ballast removal power element to perform the ballast removal action.

[0096] When only excavator operation is performed:

[0097] The solenoid valve 3-8 works when power is off, and controls the shut-off valve 3-6 to reset under the action of spring force, connecting the first oil supply channel and the second oil supply channel, so that the first pump 3-1 and the second pump 3-2 merge to supply oil to the excavator's walking, rotation, boom, dipper arm, bucket and other execution actions, ensuring the high efficiency of the excavator's excavation work.

[0098] The multi-way valve 3-5 is not working, and the third pump 3-3 is at low pressure and small flow, so the power of the equipment is not wasted.

[0099] That is to say, since the ballast removal valve unit 3-7 and the shut-off valve 3-6 are not working, the first pump 3-1 and the second pump 3-2 merge to supply oil to the excavator's walking, rotation, boom, dipper arm, bucket and other execution actions, ensuring the efficient excavation of the excavator. At the same time, the ballast removal valve unit of the multi-way valve 3-5 is not working, and the third pump 3-3 is at low pressure and small flow, so as not to waste equipment power.

[0100] With such a configuration, the hydraulic control system 3 of the present application has an autonomous switching function. When the ballast removal action is performed in the screening condition, the corresponding action controlled by the main pump is switched autonomously to realize the separate control of the adjustment action and the operation action, fundamentally avoiding the flow rush phenomenon between the ballast removal, ballast removal and whole machine travel during the screening work. When switched to the excavator condition, the main pump merges to supply the excavator action to ensure the flow and work efficiency of the excavation condition.

[0101] In some embodiments, the cleaning machine further includes an emergency rescue system 4, which includes an emergency engine 4-1, a coupling 4-2 and an emergency pump 4-3. The emergency pump 4-3 is connected to the multi-control valve group 3-4 through a hydraulic oil circuit, and the emergency pump 4-3 is used to generate hydraulic power when the first pump 3-1 and the second pump 3-2 fail; the emergency engine 4-1 is connected to the emergency pump 4-3 through the coupling 4-2, and the emergency engine 4-1 is used to output power to the emergency pump 4-3.

[0102] It can be understood that the output power of the emergency engine 4-1 is transmitted to the emergency pump 4-3 through the coupling 4-2, and the hydraulic oil circuit of the emergency pump 4-3 is connected in series with the hydraulic oil circuit of the hydraulic control system 3. When the main engine and the main pump stop working due to a fault, the emergency engine 4-1 is started to drive the emergency pump 4-3 to realize the various actions of the whole machine, and realize the emergency reset of the whole machine and the lowering of the rail track, and the whole machine is evacuated from the current workplace to a safe area. The start and stop of the emergency engine 4-1 is integrated on the cab control panel, which is convenient for starting the emergency engine 4-1 under emergency conditions, and has an interlocking function with the main engine.

[0103] The above-mentioned emergency rescue system 4 or emergency power system can ensure that the cleaning machine can perform various actions in the event of a main pump failure, and allow the main machine to leave the main line to ensure safety.

[0104] In some embodiments, the getting-off assembly 1 also includes a slewing drive assembly and a central slewing joint. The slewing drive assembly is connected to the central slewing joint. The slewing drive assembly may be a drive motor. The drive motor is used to provide rotational power to drive the central slewing joint to rotate. The central slewing joint is connected to the slewing platform of the getting-on assembly 2 to drive the getting-on assembly 2 to rotate.

[0105] In addition, in addition to being able to rotate, the central swivel joint can also transmit the hydraulic oil and electric current of the upper vehicle assembly 2 to the lower vehicle assembly 1.

[0106] In order to facilitate limiting the rotation angle of the upper vehicle assembly 2, the rotation limit device 6-2 includes an encoder 6-2-4, which is arranged on the central rotary joint. The encoder 6-2-4 is used to detect the rotation angle of the upper vehicle assembly 2. Furthermore, the screening machine also includes a control system, which is communicatively connected with the encoder 6-2-4 and the rotary drive component. The control system is used to control the rotary drive component to stop driving the upper vehicle assembly 2 to rotate when the rotation angle detected by the encoder 6-2-4 deviates from the set range.

[0107] In this way, the left and right deflection control angles are set respectively through the encoder 6-2-4 and the control system, so as to realize the soft limit of the left and right rotation of the upper vehicle assembly 2.

[0108] In some embodiments, the slewing limit device 6-2 also includes a limit rod 6-2-3, two right slewing limit seats 6-2-1 and two left slewing limit seats 6-2-2. The two right slewing limit seats 6-2-1 are relatively arranged on the first circumference line on the crawler chassis system 1-1, and the two left slewing limit seats 6-2-2 are relatively arranged on the second circumference line on the crawler chassis system 1-1, the first circumference line is located on the outer circle of the second circumference line, and the limit rod 6-2-3 can be switchably connected to the first socket and the second socket of the slewing platform.

[0109] In this way, when the limit rod 6-2-3 is inserted into the first hole, the limit rod 6-2-3 is used to rotate between the two right rotary limit seats 6-2-1 so that the vehicle assembly 2 can operate within the preset range on the left side. When the limit rod 6-2-3 is inserted into the second hole, the limit rod 6-2-3 is used to rotate between the two left rotary limit seats 6-2-2 so that the vehicle assembly 2 can operate within the preset range on the right side.

[0110] It should be noted that the above-mentioned left preset range and right preset range are both rotation angles greater than 180°.

[0111] Specifically, the right rotary limit seat 6-2-1 and the left rotary limit seat 6-2-2 are both provided with limit grooves. The limit groove of the right rotary limit seat 6-2-1 opens to the left side so that the limit rod 6-2-3 is within the preset range on the left side. When the limit groove of the left rotary limit seat 6-2-2 opens to the right side so that the limit rod 6-2-3 is within the preset range on the right side, the limit rod 6-2-3 rotates to the limit grooves of the right rotary limit seat 6-2-1 and the left rotary limit seat 6-2-2 to form a mechanical hard limit.

[0112] With such arrangement, when the encoder 6-2-4 may fail, the limit rod 6-2-3, two right-swing limit seats 6-2-1 and two left-swing limit seats 6-2-2 form a mechanical hard limit, so that the on-board assembly 2 no longer rotates, avoids crossing the center line of the railway track, and realizes safe limit for the on-board assembly 2.

[0113] The above-mentioned rotation limit device 6-2 can limit the rotation direction and angle of the screen cleaning machine according to the working conditions of the construction track, eliminating the situation where the corresponding track is affected during construction.

[0114] In some embodiments, the height limiting device 6-3 includes a height limiting detection component, which is communicatively connected to the control system and is used to detect the lifting height of the working boom 5-2 so that the control system limits the lifting of the working boom 5-2 when the lifting height of the working boom 5-2 exceeds a specified height.

[0115] Of course, according to actual needs, the above-mentioned height limit detection component is specifically a height limit sensor, or a tension sensor.

[0116] In some embodiments, the height limiting device 6-3 further comprises a height limiting rope, which is connected between the height limiting detection member and the working boom 5-2, and is used to limit the lifting of the working boom 5-2. Of course, the height limiting rope can be a steel wire rope.

[0117] It can be seen that when the working boom 5-2 is lifted to a height exceeding the specified height, the height limit sensor will work first, limiting the working boom 5-2 from further lifting and requiring it to descend; when the height limit sensor fails to work due to a fault, the wire rope acts as a mechanical limit. Therefore, through the combined action of the height limit sensor and control system and the anti-top-impact wire rope, the height limit is achieved from both software and hardware aspects, avoiding the occurrence of top-impact failures of the working boom 5-2.

[0118] The height protection system 6 has both flexible electric control protection function and rigid protection function, which completely eliminates the hidden danger of over-height crossing.

[0119] In some embodiments, the protection system 6 also includes an anti-electricity device 6-4, which is arranged on the working boom 5-2 and is used to prevent the working boom 5-2 from accidentally touching the high-voltage line.

[0120] For example, the anti-electricity device 6-4 is specifically an insulating plate, which can prevent the working arm 5-2 from contacting the high-voltage line above the track in the event of an erroneous operation, thereby avoiding the high-voltage line above the track during railway construction.

[0121] In addition, the protection system 6 also includes a one-button emergency stop system 6-1. By setting the one-button emergency stop system 6-1, the safety officer can remotely control the one-button shutdown when a dangerous situation is discovered.

[0122] In some embodiments, the working attachment 7 includes an attachment shaft 7-1 and an attachment body 7-2. The attachment quick-change mechanism 5-1 is driven by a hydraulic cylinder configured by itself, connected to the attachment shaft 7-1, to achieve a mechanical connection between the working arm 5-2 and the attachment body 7-2, and connected to the hydraulic power through a quick-change oil pipe joint, wherein the attachment body 7-2 can be a ballast stripping chain, and can also be quickly replaced with other accessories such as a sleeper changer, a vibrator, and a track guide grinding trolley as needed.

[0123] For example, by configuring the working arm 5-2 with cleaning accessories, ballast stripping, ballast removal and cleaning operations can be realized; by configuring the working arm 5-2 with guide rail grinding operations, the grinding and shaping of worn guide rails can be realized; by configuring the working arm 5-2 with a bucket, the excavator function of the screening machine can be realized.

[0124] The above-mentioned screening machine can be used not only for construction in ordinary railway engineering sections, but also for normal construction in sections with limited space such as bridges and tunnels.

[0125] To sum up, the screening machine of the present application integrates the functions of guide rail ballast cleaning, guide rail grinding and excavation, is equipped with a high-power engine and a multi-pump system, and adopts a compact layout with a short tail and a narrow platform. The whole machine can not only perform the functions of replacing sleepers, cleaning and guide rail grinding for railway maintenance in normal railway sections, but also perform railway maintenance work in bridge and tunnel sections. It is also particularly suitable for track maintenance work in width and height restricted areas in bridge and tunnel sections, realizing multi-functionality of one machine, improving construction efficiency, enhancing economic benefits and ensuring operation safety.

[0126] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0127] The above is a detailed introduction to the screen cleaning machine provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the scheme and its core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the present application.

Claims

1. A cleaning machine, characterized in that: include: An alighting assembly, the alighting assembly comprising a crawler chassis system and a track wheel system, the track wheel system being arranged on the crawler chassis system, and the track wheel system being used to work on tracks; A superstructure assembly is rotatably mounted on the crawler chassis system and is used to rotate relative to the crawler chassis system around a central axis of the crawler chassis system; A working device connected to the upper vehicle assembly, the working device comprising a working boom and an attachment quick-change mechanism provided on the working boom; A hydraulic control system connected to the upper vehicle assembly, the lower vehicle assembly and the working device, and used to control the upper vehicle assembly, the lower vehicle assembly and the working device to work; A protection system, the protection system comprising a rotation limit device and a height limit device, the rotation limit device is used to limit the rotation angle of the upper vehicle assembly within a set range, and the height limit device is connected to the working boom to limit the lifting of the working boom; The working attachment is detachably connected to the attachment quick-change mechanism and is used to perform corresponding operations.

2. The cleaning machine according to claim 1, characterized in that: The lower vehicle assembly further comprises a rotary drive assembly and a central rotary joint, wherein the rotary drive assembly is connected to the central rotary joint, and the central rotary joint is connected to the rotary platform of the upper vehicle assembly to drive the upper vehicle assembly to rotate; The rotation limit device includes an encoder, which is arranged on the central rotation joint and is used to detect the rotation angle of the upper vehicle assembly; The screening machine also includes a control system, which is communicatively connected to the encoder and the rotary drive assembly, and is used to control the rotary drive assembly to stop driving the upper car assembly to rotate when the rotary angle detected by the encoder deviates from a set range.

3. The cleaning machine according to claim 2, characterized in that: The rotation limiting device also includes: Two right slewing limit seats are arranged oppositely on a first circumferential line on the crawler chassis system; Two left slewing limit seats are arranged oppositely on a second circumferential line on the crawler chassis system; A limit rod is switchably connected to the first socket and the second socket of the rotating platform. When the limit rod is inserted into the first socket, the limit rod is used to rotate between the two right rotating limit seats so that the boarding assembly can operate within a preset range on the left side. When the limit rod is inserted into the second socket, the limit rod is used to rotate between the two left rotating limit seats so that the boarding assembly can operate within a preset range on the right side.

4. The cleaning machine according to claim 2, characterized in that: The height limiting device includes a height limiting detection component, which is communicatively connected to the control system and is used to detect the lifting height of the working boom so that the control system limits the lifting of the working boom when the lifting height of the working boom exceeds a limited height.

5. The cleaning machine according to claim 4, characterized in that: The height limiting device also includes a height limiting rope, which is connected between the height limiting detection member and the working boom, and is used to limit the lifting of the working boom.

6. The cleaning machine according to claim 1, characterized in that: The vehicle dismounting assembly further comprises a speed measuring component, which is arranged on the track wheel system to detect the travel speed of the track wheel system. The speed measuring component comprises: A speed sensing plate, arranged on the driving wheel of the track wheel system; The rotation speed sensor cooperates with the rotation speed sensing sheet to detect the rotation speed of the driving wheel.

7. The cleaning machine according to claim 1, characterized in that: The protection system also includes an anti-electricity device, which is arranged on the working boom and is used to prevent the working boom from accidentally touching a high-voltage line.

8. The cleaning machine according to claim 1, characterized in that: The hydraulic control system comprises: A multi-valve control group, the multi-valve control group includes a ballast removal valve group and an excavation valve group assembly, the ballast removal valve group is used to control the opening and closing of the ballast removal power element, and the excavation valve group assembly is used to control the opening and closing of the excavation power assembly; A first pump connected to the ballast removal valve via a first oil supply channel; a second pump connected to the excavation valve coupling assembly via a second oil supply passage; a cut-off valve, provided at the confluence point of the first oil supply passage and the second oil supply passage, for controlling the connection and cut-off of the first oil supply passage and the second oil supply passage; when the cut-off valve cuts off the first oil supply passage and the second oil supply passage, the first pump supplies oil to the ballast removal valve assembly through the first oil supply passage, and the second pump supplies oil to the excavation valve assembly through the second oil supply passage; when the cut-off valve connects the first oil supply passage and the second oil supply passage, the first pump and the second pump join together to supply oil to the excavation valve assembly; The solenoid valve is configured to control the cut-off valve to cut off the first oil supply channel and the second oil supply channel when powered, and to control the cut-off valve to connect the first oil supply channel and the second oil supply channel when powered off.

9. The cleaning machine according to claim 8, characterized in that: The hydraulic control system also includes: A multi-way valve, wherein the multi-way valve comprises a ballast discharge valve link, and the ballast discharge valve link is used to be connected to a ballast discharge power element through a ballast discharge oil circuit to control the opening and closing of the ballast discharge power element; The third pump is connected to the multi-way valve through a third oil supply channel, and is used to supply oil to the ballast discharge valve through the third oil supply channel to control the ballast discharge power element to perform ballast discharge action.

10. The cleaning machine according to claim 8, characterized in that: The cleaning machine also includes an emergency rescue system, which includes: An emergency pump, connected to the multi-control valve group through a hydraulic oil circuit, for generating hydraulic power when the first pump and the second pump fail; The emergency engine is connected to the emergency pump via a coupling and is used to output power to the emergency pump.

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