Guardrail cleaning arm and guardrail cleaning vehicle

Abstract

This invention belongs to the technical field of guardrail cleaning equipment, and provides a guardrail cleaning arm and a guardrail cleaning vehicle. The guardrail cleaning arm includes a working support robotic arm and a cleaning mechanism located at its working end. The cleaning mechanism includes a hollow water-carrying rotating main shaft, an integrated spray brush roller, and a rotary drive power assembly. The hollow water-carrying rotating main shaft has an axial main water-carrying channel inside, and multiple sets of primary water distribution holes are opened on its side wall; the integrated spray brush roller has corresponding secondary spray holes; through the cooperation of a fluid on / off control slide valve and a rotating water circuit on / off drive assembly, water is only channeled in the brushing and spraying operation area to achieve simultaneous "brushing and spraying" operation. The guardrail cleaning arm and guardrail cleaning vehicle provided by this invention effectively solve the problems of asynchronous spraying and brushing, low cleaning efficiency, and water waste in traditional guardrail cleaning equipment, and improve cleaning quality and operational reliability.

Description

Technical Field

[0001] This invention relates to the field of guardrail cleaning equipment technology, specifically to a guardrail cleaning arm and a guardrail cleaning vehicle. Background Technology

[0002] Road guardrails are exposed to the outdoor environment for a long time, and their surfaces are prone to accumulating dirt such as dust, mud, and oil. They need to be cleaned and maintained regularly. Currently, the cleaning operation is mainly carried out by guardrail cleaning trucks equipped with cleaning arms.

[0003] The existing guardrail cleaning vehicles have obvious defects in actual use: the spraying and brushing operations cannot be synchronized. Either spraying comes first and brushing comes later, or brushing comes first and spraying comes later, resulting in poor overall cleaning quality. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the purpose of this invention is to provide a guardrail cleaning arm and a guardrail cleaning vehicle to solve or alleviate the above-mentioned technical problems existing in the prior art.

[0005] To achieve the above objectives, in one aspect, the present invention provides a guardrail cleaning arm, comprising a working support robotic arm and a cleaning mechanism disposed on the working support robotic arm, the cleaning mechanism comprising:

[0006] The hollow water conveying rotary shaft is disposed at the working end of the working support robotic arm and is rotatably connected to the working support robotic arm.

[0007] An integrated spray scrubbing roller coaxially sleeved on and fixedly connected to the hollow water conveying rotating main shaft; and

[0008] The rotary drive power assembly mounted on the working support robotic arm is used to drive the hollow water conveying rotary main shaft to rotate.

[0009] The hollow water conveying rotating main shaft is provided with an axial main water conveying channel extending along the axial direction. The side wall of the part of the hollow water conveying rotating main shaft located inside the integrated spray brush washing roller is provided with multiple sets of primary water distribution holes evenly distributed around the axis of the hollow water conveying rotating main shaft. Each set of primary water distribution holes has multiple primary water distribution holes arranged sequentially and spaced along the axial direction.

[0010] The integrated spray brush roller is provided with a secondary spray hole group that corresponds one-to-one with the primary water distribution hole group. The number of secondary spray holes in the secondary spray hole group is equal to the number of primary water distribution holes in the corresponding primary water distribution hole group and corresponds one-to-one.

[0011] Optionally, it also includes:

[0012] A fluid on / off control slide valve, the number of which corresponds one-to-one with the number of the primary water distribution hole groups, wherein the fluid on / off control slide valve has a plate-like structure or a shaft-like structure, and the fluid on / off control slide valve is entirely housed within the space defined by the integrated spray scrubbing roller and / or the hollow water conveying rotating main shaft, and is axially slidingly engaged with the integrated spray scrubbing roller and / or the hollow water conveying rotating main shaft, and is entirely housed within the space defined by the integrated spray scrubbing roller and / or the hollow water conveying rotating main shaft; and

[0013] A rotary water circuit switching drive assembly is mounted on the work support robotic arm;

[0014] The fluid on / off control slide valve has a group of aligned guide channels corresponding to the group of primary water distribution holes. The number of aligned guide channels in the group of aligned guide channels is equal to the number of primary water distribution holes in the corresponding group of primary water distribution holes and they correspond one-to-one.

[0015] The fluid on / off control slide valve has a water path cut-off position and a water path conduction position;

[0016] When the fluid flow control valve is in the water circuit cut-off position, the alignment guide channel is misaligned with the primary water distribution hole and the secondary spray hole to block the fluid passage.

[0017] When the fluid on / off control slide valve is in the water circuit conduction position, the alignment guide channel is aligned with the primary water distribution hole and the secondary spray hole, so that the cleaning liquid flows from the primary water distribution hole through the alignment guide channel to the secondary spray hole and is sprayed out.

[0018] The rotating water circuit on / off drive assembly is configured to: drive the corresponding fluid on / off control slide valve to the water circuit conduction position when the secondary spray hole group is located in the brushing spray operation area, and drive the corresponding fluid on / off control slide valve to the water circuit cut-off position when the secondary spray hole group is located in the non-brushing spray operation area.

[0019] Optionally, the rotary water circuit on / off drive assembly includes a drive unit corresponding to each of the fluid on / off control slide valves, the drive unit comprising:

[0020] A circular trajectory limiting drive ring is arranged coaxially with the hollow water conveying rotating main shaft. The trajectory limiting drive ring is fixedly connected to the working support robotic arm. On the side of the trajectory limiting drive ring facing the fluid on / off control slide valve, there is a first limiting support surface and a second limiting support surface parallel to the rotation plane of the hollow water conveying rotating main shaft. The first limiting support surface and the second limiting support surface are arranged opposite to each other, and the first limiting support surface is far away from the integrated spray brush roller. The first limiting support surface and the second limiting support surface are smoothly transitioned by a sliding transition slope.

[0021] A push rod, one end of which is connected to the fluid on / off control slide valve, and the other end extending towards the trajectory limiting drive ring and abutting against the side wall of the trajectory limiting drive ring facing the fluid on / off control slide valve; and

[0022] A normal reset elastic element has its two ends connected to the hollow water conveying rotary main shaft and the fluid on / off control slide valve, respectively. The normal reset elastic element is configured to apply an elastic force to the fluid on / off control slide valve in the direction of the trajectory limiting drive ring.

[0023] Wherein, when the water circuit cut-off position of the fluid on / off control slide valve is close to the trajectory limit drive ring, the first limit support surface is located on the side of the trajectory limit drive ring facing the scrubbing spray operation area.

[0024] When the water circuit cutoff position of the fluid on / off control slide valve is far away from the trajectory limit drive ring, the first limit support surface is located on the side of the trajectory limit drive ring away from the scrubbing spray operation area.

[0025] Optionally, the drive unit further includes:

[0026] The flow channel opening and closing sleeve is a hollow cylindrical structure with an opening only at the bottom. The flow channel opening and closing sleeve is sleeved on the push rod. The bottom end of the flow channel opening and closing sleeve is inserted into the hollow water conveying rotating main shaft and / or the integrated spray brush washing roller, and is sealed with the hollow water conveying rotating main shaft and / or the integrated spray brush washing roller.

[0027] A hydraulically driven push piston is disposed within the flow channel opening and closing sleeve and slidably connected to the flow channel opening and closing sleeve along the axial direction. The hydraulically driven push piston is fixedly connected to the push rod. The outer wall of the hydraulically driven push piston is in contact with and sealed to the inner wall of the flow channel opening and closing sleeve, thereby forming a hydraulic drive chamber at the bottom of the hydraulically driven push piston.

[0028] An emergency flexible component is provided, with its two ends connected to the hollow water conveying rotating main shaft and the flow channel opening and closing sleeve, respectively.

[0029] The hollow water conveying rotating main shaft and / or the integrated spray brush washing roller are provided with hydraulic guide channels for connecting the hydraulic drive chamber and the axial main water conveying channel;

[0030] The flow channel opening and closing sleeve has a flow channel blocking position and a flow channel opening position;

[0031] When the flow channel is in the blocked position, the bottom end of the flow channel opening and closing sleeve corresponds to the hydraulic flow channel to close the hydraulic flow channel;

[0032] When the flow channel is in the open position, the flow channel opening and closing sleeve is located above the hydraulic flow channel to open the hydraulic flow channel;

[0033] The fault emergency elastic component is configured to drive the flow channel opening and closing sleeve from the flow channel blocking position to the flow channel opening position when the normal reset elastic component fails.

[0034] Optionally, the free end of the push rod is provided with omnidirectional ball bearings.

[0035] Optionally, the fluid on / off control slide valve is disposed inside the hollow water conveying rotating main shaft.

[0036] Optionally, the fluid on / off control slide valve has a shaft-like structure, and the alignment guide channel is a through hole or annular groove formed on the fluid on / off control slide valve.

[0037] Optionally, the fluid on / off control slide valve has a plate-like structure, and the alignment guide channel is a through hole formed on the fluid on / off control slide valve.

[0038] On the other hand, the present invention also provides a guardrail cleaning vehicle, including the guardrail cleaning arm described in any one of the above claims.

[0039] The beneficial effects of this invention are:

[0040] The guardrail cleaning arm provided by this invention adopts a structure in which an axial main water supply channel and a primary water distribution hole are set inside the hollow water supply rotating main shaft, and a secondary spray hole is correspondingly opened on the integrated spray brush washing roller. This allows the cleaning liquid to be directly transported to the surface of the integrated spray brush washing roller through the channel inside the hollow water supply rotating main shaft and sprayed out evenly, thereby solving the problem that the spraying and brushing operations of traditional guardrail cleaning arms cannot be synchronized. Attached Figure Description

[0041] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0042] Figure 1 This is a perspective view of a guardrail cleaning arm provided in an embodiment of the present invention;

[0043] Figure 2 for Figure 1 The front view of the guardrail cleaning arm shown;

[0044] Figure 3 for Figure 2 An enlarged view of part A is shown below;

[0045] Figure 4 for Figure 2 A cross-sectional view of Embodiment 1 of the guardrail cleaning arm shown in the BB direction;

[0046] Figure 5 for Figure 4 An enlarged view of section C is shown;

[0047] Figure 6 for Figure 4 An enlarged view of section D is shown;

[0048] Figure 7 for Figure 2 The cross-sectional view of Embodiment 2 of the guardrail cleaning arm shown in the BB direction;

[0049] Figure 8 for Figure 7 An enlarged view of section E is shown;

[0050] Figure 9 for Figure 7 An enlarged view of part F shown;

[0051] Figure 10 for Figure 2 The cross-sectional view of Embodiment 2 of the guardrail cleaning arm shown in the BB direction;

[0052] Figure 11 for Figure 10 An enlarged view of section G shown;

[0053] Figure 12 for Figure 10 An enlarged view of section H is shown;

[0054] Figure 13 for Figure 2The cross-sectional view of Embodiment 2 of the guardrail cleaning arm shown in the BB direction;

[0055] Figure 14 for Figure 13 An enlarged view of part I shown;

[0056] Figure 15 for Figure 13 An enlarged view of section J shown;

[0057] Figure 16 for Figure 3 The diagram shows the structural view of the guardrail cleaning arm when the normal reset elastic element fails.

[0058] Figure label:

[0059] 100. Operation support robotic arm; 210. Hollow water conveying rotary spindle; 211. Axial main water conveying channel; 212. Cleaning fluid inlet hole; 213. Primary water distribution hole; 214. Hydraulic guide channel; 220. Integrated spray brush roller; 221. Secondary spray hole; 230. Fluid on / off control slide valve; 231. Alignment guide channel; 241. Trajectory limit drive ring; 201. First limit support surface; 202. Second limit support surface; 203. Sliding transition slope; 242. Push rod; 243. Normal reset elastic element; 244. Channel opening and closing sleeve; 245. Hydraulic push piston; 246. Emergency elastic element; 247. Universal ball bearing; 250. Rotary sealing water inlet connector; 260. Rotary drive power assembly. Detailed Implementation

[0060] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0061] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0062] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0063] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0064] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0066] Example 1

[0067] like Figures 1-16 As shown, the present invention provides a guardrail cleaning arm, including a working support robotic arm 100 and a cleaning mechanism installed at the working end of the working support robotic arm 100. The cleaning mechanism includes a hollow water conveying rotary spindle 210, an integrated spray brush roller 220, and a rotary drive power assembly 260.

[0068] The hollow water-carrying rotating main shaft 210 is rotatably connected to the working support robotic arm 100 through bearings and other structures to ensure its stable rotation. The integrated spray brush roller 220 is a cylindrical brush body, which is sleeved on the hollow water-carrying rotating main shaft 210, and its inner wall is fixedly connected to the outer wall of the hollow water-carrying rotating main shaft 210 so that the two rotate synchronously, thereby realizing the physical brushing of the guardrail surface.

[0069] The rotary drive power assembly 260 can be a hydraulic motor or an electric motor. The rotary drive power assembly 260 is mounted on the work support robotic arm 100. It drives the hollow water conveying rotary spindle 210 to rotate through a transmission mechanism (e.g., gear, belt or direct coupling), thereby driving the integrated spray scrubbing roller 220 to rotate at high speed.

[0070] The key feature is that the hollow water-carrying rotary spindle 210 has an axially extending main water-carrying channel 211 inside, and a radially penetrating cleaning fluid inlet hole 212 at the liquid inlet end of the hollow water-carrying rotary spindle 210, through which the cleaning fluid enters the flow channel. A rotary sealed water inlet connector 250 is fitted at the cleaning fluid inlet hole 212, and the rotary sealed water inlet connector 250 is rotatably connected to the hollow water-carrying rotary spindle 210 and connected to an external water supply system. The rotary sealed water inlet connector 250 allows the hollow water-carrying rotary spindle 210 to maintain a stable liquid input while rotating continuously, avoiding pipe entanglement.

[0071] The hollow water-carrying rotating main shaft 210, located within the integrated spray scrubbing roller 220, has multiple sets of primary water distribution holes on its side wall. Each set of primary water distribution holes includes several primary water distribution holes 213 distributed axially. Correspondingly, the integrated spray scrubbing roller 220 has a set of secondary spray holes in perfectly matched numbers and positions. The cleaning fluid enters the secondary spray holes 221 from the axial main water supply channel 211 through the primary water distribution holes 213, and is finally sprayed onto the guardrail surface through the corresponding secondary spray holes 221.

[0072] This structure achieves a collaborative cleaning mode of "brushing and spraying simultaneously": the integrated spray brush roller 220 provides mechanical friction to remove dirt, while the cleaning fluid immediately rinses off the detached dirt, preventing it from re-adhering. Because the water outlets are evenly distributed circumferentially, regardless of the rotation angle of the integrated spray brush roller 220, there are always water outlets facing the guardrail, ensuring continuous and uniform spray coverage. This design significantly improves cleaning efficiency and cleanliness, while avoiding cleaning blind spots caused by the angle limitations of traditional fixed nozzles.

[0073] Example 2

[0074] like Figure 1-16 As shown, in this embodiment, the guardrail cleaning arm also includes a fluid flow control slide valve and a rotary water flow drive assembly.

[0075] The number of fluid on / off control slide valves 230 corresponds one-to-one with the primary water distribution hole group. The fluid on / off control slide valve 230 can be a plate-shaped structure or a shaft-shaped structure, and it is provided with a positioning guide channel 231. The number of positioning guide channels 231 is consistent with the corresponding water outlet holes (primary water distribution hole 213 and secondary spray hole 221).

[0076] Specifically, such as Figures 4-12 As shown, in this embodiment, the fluid on / off control slide valve 230 adopts a shaft-shaped structure, and its alignment guide channel 231 is a through hole that penetrates radially or obliquely, or an annular groove.

[0077] like Figures 13-15As shown, in this embodiment, the fluid on / off control slide valve adopts a plate-shaped fluid on / off control slide valve 230, and its alignment guide channel 231 is a through hole that vertically penetrates the plate.

[0078] The fluid on / off control slide valve 230 is axially slidably mounted within the cavity formed inside the hollow water conveying rotating main shaft 210 and / or the integrated spray scrubbing roller 220. Specifically, as shown... Figures 13-15 As shown, in this embodiment, the fluid on / off control slide valve 230 is installed inside the hollow water conveying rotating spindle 210. However, in other alternative embodiments, the fluid on / off control slide valve 230 can be installed inside the integrated spray brush roller 220, or between the integrated spray brush roller 220 and the hollow water conveying rotating spindle 210.

[0079] The fluid on / off control slide valve can move between the water path cut-off position and the water path opening position. Specifically, when the fluid on / off control slide valve 230 is in the water path cut-off position, the alignment guide channel 231 is misaligned with the primary water distribution hole 213 and the secondary spray hole 221 to block the fluid passage.

[0080] When the fluid flow control valve 230 is in the water flow open position, the alignment guide channel 231 is aligned with the primary water distribution hole 213 and the secondary spray hole 221 to open the fluid passage, so that the cleaning fluid flows from the primary water distribution hole 213 through the alignment guide channel 231 to the secondary spray hole 221 and is sprayed out from the secondary spray hole 221.

[0081] A rotating water circuit on / off drive assembly is mounted on the work support robotic arm 100. The rotating water circuit on / off drive assembly is used to control the position of the fluid on / off control slide valve 230: When a certain secondary spray hole group rotates to the scrubbing spray operation area (i.e., the direction facing the guardrail), the rotating water circuit on / off drive assembly drives the corresponding fluid on / off control slide valve 230 to the water circuit conduction position. At this time, the alignment guide channel 231 is aligned with the axis of the primary water distribution hole 213 and the secondary spray hole 221 to form a continuous flow channel, and the cleaning liquid is sprayed out smoothly. When the secondary spray hole group rotates to the non-scrubbing spray operation area (i.e., the direction away from the guardrail, for example: facing the vehicle body), the rotating water circuit on / off drive assembly drives the corresponding fluid on / off control slide valve 230 to the water circuit cut-off position. The alignment guide channel 231 is misaligned with the water outlet (primary water distribution hole 213 and secondary spray hole 221), and the water flow is physically blocked.

[0082] This design allows water to be sprayed only in the effective cleaning area, avoiding unnecessary spraying of cleaning fluid into non-target areas (such as roads, vehicle bodies, or the air). This saves water resources and reduces secondary pollution caused by wastewater splashing. At the same time, reducing ineffective spraying also reduces the load on the water supply system and extends the equipment's lifespan.

[0083] Example 3

[0084] like Figures 1-16 As shown, in this embodiment, the rotary water circuit on / off drive assembly includes drive units corresponding to the fluid on / off control slide valve 230. The drive unit includes a trajectory limit drive ring 241, a push rod 242, and a normal reset elastic element 243.

[0085] The trajectory limiting drive ring 241 is an annular component fixed on the working support robotic arm 100. On the side facing the fluid on / off control slide valve 230, there are a first limiting support surface 201 and a second limiting support surface 202 arranged opposite to each other. The two are parallel to the rotation plane of the hollow water conveying rotating main shaft 210. The first limiting support surface 201 is far away from the integrated spray brush washing roller 220. The two limiting support surfaces are smoothly transitioned by the sliding transition slope 203.

[0086] One end of the push rod 242 is fixedly connected to the fluid on / off control slide valve 230, and the other end points to the trajectory limit drive ring 241 and abuts against the side wall (i.e. the first limit support surface 201, the second limit support surface 202 and the sliding transition slope 203) on the side facing the fluid on / off control slide valve 230.

[0087] The normal reset elastic element 243 can be a compression spring. One end of the normal reset elastic element 243 is connected to the hollow water conveying rotary main shaft 210, and the other end is connected to the push rod 242. The normal reset elastic element 243 is used to apply elastic force to the fluid on / off control slide valve 230 so as to always push the fluid on / off control slide valve 230 to move towards the trajectory limit drive ring 241.

[0088] Among them, such as Figures 4-6 As shown, in one embodiment, the water circuit cut-off position of the fluid on / off control slide valve 230 is close to the trajectory limit drive ring 241, and correspondingly, the first limit support surface 201 is located on the side of the trajectory limit drive ring (241) facing the scrubbing spray operation area (i.e. facing the guardrail).

[0089] When the integrated spray scrubbing roller 220 rotates and the target secondary spray hole group is in the non-scrubbing spray operation area, the end of the push rod 242 abuts against the second limiting support surface 202, and the fluid on / off control slide valve 230 is in the water circuit cut-off position, shutting off the water spray; as the integrated spray scrubbing roller 220 continues to rotate, the push rod 242 slides into the first limiting support surface 202, and at the same time, the normally reset elastic element 243 pushes the fluid on / off control slide valve 230 to move axially to the water circuit conduction position, turning on the water spray; when the secondary spray hole group leaves the guardrail area, the push rod 242 climbs along the sliding transition slope 203, overcoming the elastic force of the normally reset elastic element 243 to push the fluid on / off control slide valve 230 to move axially to the water circuit cut-off position.

[0090] like Figures 5-15As shown, in another embodiment, the water circuit cut-off position of the fluid on / off control slide valve 230 is far away from the trajectory limit drive ring 241. Correspondingly, the first limit support surface 201 is located on the side of the trajectory limit drive ring (241) away from the scrubbing spray operation area (i.e. away from the guardrail).

[0091] When the integrated spray scrubbing roller 220 rotates and the target secondary spray hole group is in the non-scrubbing spray operation area, the end of the push rod 242 abuts against the first limiting support surface 201, and the fluid on / off control slide valve 230 is in the water circuit cut-off position, shutting off the water spray; as the integrated spray scrubbing roller 220 continues to rotate, the push rod 242 climbs along the sliding transition slope 203, overcoming the spring force to push the fluid on / off control slide valve 230 axially to the water circuit conduction position, turning on the water spray; when the hole group leaves the guardrail area, the push rod 242 slides into the second limiting support surface 202, and the fluid on / off control slide valve 230 returns to the water circuit cut-off position under the action of the spring reset force.

[0092] This structure requires no sensors, controllers, or additional energy. It automatically switches states by relying on rotational motion and geometric contours, and has the advantages of high reliability, low cost, and maintenance-free operation. It is particularly suitable for sanitation equipment in harsh outdoor working conditions.

[0093] Example 4

[0094] like Figures 4-16 As shown, in this embodiment, the drive unit further includes a flow channel opening and closing sleeve 244 and a hydraulic push piston 245.

[0095] A flow channel opening / closing sleeve 244 is fitted around the push rod 242, with its bottom end sealed and inserted into the mounting hole of the hollow water conveying rotating main shaft 210 or the integrated spray scrubbing roller 220. A hydraulic push piston 245 is fixed to the push rod 242 and slides sealed within the flow channel opening / closing sleeve 244, and a hydraulic drive chamber is formed at the bottom of the hydraulic push piston. The hydraulic drive chamber has a hydraulic guide flow channel 214 that communicates with the axial main water conveying channel 211.

[0096] The flow channel opening and closing sleeve 244 has a flow channel blocking position and a flow channel opening position. When the flow channel opening and closing sleeve 244 is in the flow channel blocking position, the bottom end of the flow channel opening and closing sleeve 244 blocks the hydraulic flow channel 214, preventing the cleaning fluid from entering the hydraulic drive chamber. When the flow channel opening and closing sleeve 244 is in the flow channel opening position, the flow channel opening and closing sleeve 244 is located above the hydraulic flow channel 214, thereby opening the hydraulic flow channel.

[0097] One end of the normally reset elastic element 243 is connected to the flow channel opening and closing sleeve 244, and the other end is connected to the push rod 242.

[0098] The emergency spring 246 can be a compression spring. The emergency spring 246 connects the hollow water conveying rotating main shaft 210 and the flow channel opening and closing sleeve 244. The emergency spring 246 is configured to apply spring force to the flow channel opening and closing sleeve 244 so as to drive the flow channel opening and closing sleeve 244 to the flow channel open position when the normal reset spring 243 fails.

[0099] Under normal conditions, the emergency elastic element 243 is compressed by the elastic force of the normal reset elastic element, keeping the flow channel opening and closing sleeve 244 in the flow channel blocking position. At this time, the bottom end of the flow channel opening and closing sleeve 244 blocks the hydraulic conductive flow channel 214, preventing the cleaning fluid from entering the hydraulic drive chamber.

[0100] If the normal reset elastic element 243 fails due to fatigue, corrosion, or fracture, the fluid on / off control slide valve 230 will not be able to be reset normally. At this time, the fault emergency elastic element 246 releases its stored energy, driving the flow channel opening and closing sleeve 244 to the flow channel open position, opening the hydraulic conduction flow channel 214. The cleaning fluid then enters the hydraulic drive chamber from the axial main water supply channel 211 through the hydraulic conduction flow channel 214, pushing the hydraulic push piston 245 to move, which in turn drives the push rod 242 and the fluid on / off control slide valve 230 to move, forcibly restoring the water spray control function.

[0101] This dual protection mechanism greatly improves the safety and availability of the equipment during long-term operation, preventing the loss of the entire machine's function due to the failure of a single component.

[0102] Example 5

[0103] like Figures 4-16 As shown, in this embodiment, a universal ball bearing 247 is added to the contact end (i.e., the free end of the push rod 242) between the push rod 242 and the trajectory limiting drive ring 241. This ball bearing can rotate freely, converting sliding friction into rolling friction, which significantly reduces the resistance when the push rod 242 slides on the sliding transition slope 203.

[0104] Example 6

[0105] In this embodiment, the present invention provides a guardrail cleaning vehicle, including a vehicle body and a guardrail cleaning arm as described in any of the above embodiments.

[0106] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A guardrail cleaning arm comprising a work support robot arm (100) and a cleaning mechanism provided on the work support robot arm (100), characterized in that, The cleaning mechanism includes: A hollow water conveying rotary spindle (210) is disposed at the working end of the working support robotic arm (100) and rotatably connected to the working support robotic arm (100). An integrated spray scrubbing roller (220) is coaxially sleeved on and fixedly connected to the hollow water conveying rotating main shaft (210); and A rotary drive power assembly (260) is mounted on the working support robotic arm (100) for driving the hollow water conveying rotary spindle (210) to rotate. The hollow water conveying rotating main shaft (210) is provided with an axial main water conveying channel (211) extending along the axial direction. The side wall of the portion of the hollow water conveying rotating main shaft (210) located inside the integrated spray brush roller (220) is provided with multiple sets of primary water distribution holes evenly distributed around the axis of the hollow water conveying rotating main shaft (210). Each set of primary water distribution holes has multiple primary water distribution holes (213) arranged sequentially and spaced along the axial direction. The integrated spray brush roller (220) is provided with a secondary spray hole group that corresponds one-to-one with the primary water distribution hole group. The number of secondary spray holes (221) in the secondary spray hole group is equal to and corresponds one-to-one with the number of primary water distribution holes (213) in the corresponding primary water distribution hole group.

2. A barrier cleaning arm according to claim 1, characterised in that Also includes: A fluid on / off control slide valve (230) is provided, the number of which corresponds one-to-one with the number of the first-stage water distribution hole groups. The fluid on / off control slide valve (230) is a plate-shaped structure or a shaft-shaped structure. The fluid on / off control slide valve (230) is fully housed in the space defined by the integrated spray brush roller (220) and / or the hollow water conveying rotating main shaft (210), and slides axially with the integrated spray brush roller (220) and / or the hollow water conveying rotating main shaft (210). as well as A rotary water circuit switching drive assembly is mounted on the work support robotic arm (100); The fluid on / off control slide valve (230) has a matching guide channel group corresponding to the primary water distribution hole group. The number of matching guide channels (231) in the matching guide channel group is equal to and corresponds one-to-one with the number of primary water distribution holes (213) in the corresponding primary water distribution hole group. The fluid on / off control slide valve (230) has a water circuit cut-off position and a water circuit conduction position; When the fluid flow control valve (230) is in the water circuit cut-off position, the alignment guide channel (231) is misaligned with the primary water distribution hole (213) and the secondary spray hole (221) to block the fluid passage. When the fluid on / off control slide valve (230) is in the water circuit conduction position, the alignment guide channel (231) is aligned with the primary water distribution hole (213) and the secondary spray hole (221) to open the fluid passage; The rotating water circuit on / off drive assembly is configured such that when the secondary spray hole group is located in the scrubbing spray operation area, the corresponding fluid on / off control slide valve (230) is driven to the water circuit conduction position, and when the secondary spray hole group is located in the non-scrubbing spray operation area, the corresponding fluid on / off control slide valve (230) is driven to the water circuit cut-off position.

3. A barrier cleaning arm according to claim 2, characterised in that, The rotary water circuit on / off drive assembly includes drive units corresponding one-to-one with each of the fluid on / off control slide valves (230), and the drive unit includes: A track limiting drive ring (241) is arranged in a ring shape and coaxially with the hollow water conveying rotating main shaft (210). The track limiting drive ring (241) is fixedly connected to the working support robot arm (100). On the side of the track limiting drive ring (241) facing the fluid on / off control slide valve (230), there is a first limiting support surface (201) and a second limiting support surface (202) parallel to the rotation plane of the hollow water conveying rotating main shaft (210). The first limiting support surface (201) and the second limiting support surface (202) are arranged opposite to each other, and the first limiting support surface (201) is far away from the integrated spray brush roller (220). The first limiting support surface (201) and the second limiting support surface (202) are smoothly transitioned by a sliding transition slope (203). A push rod (242), one end of which is connected to the fluid on / off control slide valve (230), and the other end extending towards the trajectory limiting drive ring (241) and abutting against the side wall of the trajectory limiting drive ring (241) facing the fluid on / off control slide valve (230); and The normal reset elastic element (243) is connected at both ends to the hollow water conveying rotary spindle (210) and the fluid on / off control slide valve (230) respectively. The normal reset elastic element (243) is configured to apply an elastic force to the fluid on / off control slide valve (230) in the direction of the trajectory limiting drive ring (241). When the water circuit cutoff position of the fluid on / off control slide valve (230) is close to the trajectory limit drive ring (241), the first limit support surface (201) is located on the side of the trajectory limit drive ring (241) facing the scrubbing spray operation area. When the water circuit cutoff position of the fluid on / off control slide valve (230) is far away from the trajectory limit drive ring (241), the first limit support surface (201) is located on the side of the trajectory limit drive ring (241) away from the scrubbing spray operation area.

4. A barrier cleaning arm according to claim 3, characterised in that, The drive unit further includes: The flow channel opening and closing sleeve (244) is a hollow cylindrical structure with an opening only at the bottom. The flow channel opening and closing sleeve (244) is sleeved on the push rod (242). The bottom end of the flow channel opening and closing sleeve (244) is inserted into the hollow water conveying rotating main shaft (210) and / or the integrated spray brush washing roller (220) and is sealed with the hollow water conveying rotating main shaft (210) and / or the integrated spray brush washing roller (220). A hydraulic push piston (245) is disposed within the flow channel opening and closing sleeve (244) and slidably connected to the flow channel opening and closing sleeve (244) axially. The hydraulic push piston (245) is fixedly connected to the push rod (242). The outer wall of the hydraulic push piston (245) is in contact with and sealed to the inner wall of the flow channel opening and closing sleeve (244), thereby forming a hydraulic drive chamber at the bottom of the hydraulic push piston (245). The emergency flexible component (246) is connected at both ends to the hollow water conveying rotating main shaft (210) and the flow channel opening and closing sleeve (244), respectively. The hydraulic drive chamber has a hydraulic flow channel (214) that is connected to the axial main water delivery channel (211). The flow channel opening and closing sleeve (244) has a flow channel blocking position and a flow channel opening position; When the flow channel is in the blocked position, the bottom end of the flow channel opening and closing sleeve (244) corresponds to the hydraulic flow channel (214) to close the hydraulic flow channel (214). When the flow channel is in the open position, the flow channel opening and closing sleeve (244) is located above the hydraulic flow channel (214) to open the hydraulic flow channel (214). The fault emergency elastic element (246) is configured to drive the flow channel opening and closing sleeve (244) from the flow channel blocking position to the flow channel opening position when the normal reset elastic element (243) fails.

5. A barrier cleaning arm according to claim 3, characterised in that, The free end of the push rod (242) is provided with a universal ball bearing (247).

6. A barrier cleaning arm according to claim 2, characterised in that The fluid on / off control slide valve (230) is located inside the hollow water conveying rotary spindle (210).

7. A barrier cleaning arm according to any one of claims 2 to 6, wherein, The fluid on / off control slide valve (230) has a shaft-shaped structure, and the alignment guide channel (231) is a through hole or annular groove opened on the fluid on / off control slide valve (230).

8. A barrier cleaning arm according to any one of claims 2 to 6, wherein, The fluid on / off control slide valve (230) has a plate-like structure, and the alignment guide channel (231) is a through hole opened on the fluid on / off control slide valve (230).

9. A guardrail washing vehicle, characterized in that Includes the guardrail cleaning arm as described in any one of claims 1-8.

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