The present disclosure relates to removal of undesired foreign matter, such as sand, from railroad tracks. More specifically, this disclosure is directed to removing such undesired foreign matter from webs of railroad tracks.
Sand plows are deployed in regions of shifting sand where railroad tracks are continually being covered over. A sand plow typically rides on wheels on a railroad track and may include several different mechanisms for sand removal. U.S. Pat. No. 9,631,332 discloses a moveable sand plow for a locomotive that seeks to ameliorate sand build up on railroad tracks. Techniques to clear railroad tracks of sand and other foreign material are actively being sought to produce cleaner rails of railroad tracks.
A mechanical sand remover removes sand from a railroad rail and includes an actuator and a pair of web wiper pads having a lateral dimension that corresponds to a lateral dimension of a rail web of the railroad rail. A caliper mechanism is mechanically coupled to the actuator and operable thereby into a retraction state and an engagement state. The caliper mechanism includes a pair of caliper arms respectively coupled to the web wiper pads at an angle relative thereto.
In another aspect, a mechanical sand remover system that removes sand from a railroad track includes a pneumatic compressor and a pair of mechanical sand removers that remove sand from the rails. Each of the mechanical sand removers includes an actuator in pneumatic communication with the pneumatic compressor and a pair of web wiper pads having a lateral dimension that corresponds to a lateral dimension of a rail web of the railroad rail. A caliper mechanism is mechanically coupled to the actuator and operable thereby into a retraction state and an engagement state. The caliper mechanism includes a pair of caliper arms respectively coupled to the web wiper pads at an angle relative thereto. A pneumatic control selectively provides pneumatic pressure to the actuator to compel the retraction state and the engagement state of the caliper mechanism.
In yet another aspect, a sand plow that removes sand from a railroad track includes a forward plow blade having a pair of rail voids that accommodate a pair of rails of the railroad track and a pair of mechanical sand removers that remove sand from the rails left by the rail voids in the forward plow blade. Each of the mechanical sand removers includes an actuator and a pair of web wiper pads having a lateral dimension that corresponds to a lateral dimension of a rail web of the corresponding one of the rails. A caliper mechanism is mechanically coupled to the actuator and operable thereby into a retraction state and an engagement state, the caliper mechanism including a pair of caliper arms respectively coupled to the web wiper pads at an angle relative thereto.
The word exemplary is used herein to mean, “serving as an example, instance or illustration.” Any embodiment of construction, process, design, technique, etc., designated herein as exemplary is not necessarily to be construed as preferred or advantageous over other such embodiments.
In yet another aspect, a sand plow that removes sand from a railroad track comprises a forward plow blade having a pair of rail voids that accommodate a pair of rails of the railroad track and a pair of mechanical sand removers that remove sand from the rails left by the rail voids in the forward plow blade. Each of the mechanical sand removers includes an actuator and a pair of web wiper pads having a lateral dimension that corresponds to a lateral dimension of a rail web of the corresponding one of the rails. A caliper mechanism is mechanically coupled to the actuator and operable thereby into a retraction state and an engagement state and includes a pair of caliper arms respectively coupled to the web wiper pads at an angle relative thereto.
Forward plow blade 12 may have a pair of rail voids, representatively illustrated at rail void 14, on its leading edge that accommodates each rail of the railroad track and allows the forward plow blade 12 to be positioned closer to the track bed. This affords deeper penetration into a sand layer deposited on the tracks but leaves an amount of sand around the rails in the shape of rail void 14. Embodiments of the concept described in the present disclosure implement techniques by which that amount of sand is removed including material disposed in the rail web (see
The illustrations and descriptions that follow are directed to mechanisms of an embodiment of the concept described in this disclosure around one rail of a pair of rails that comprise a railroad track. It is to be understood that the concept described in this disclosure can be embodied with such a mechanism deployed at both rails and such should be inferred for the examples provided herein.
Certain embodiments of the concept described in the present disclosure may include a rail head wiper 130 to remove sand from rail head 22 of rail 20. In the illustrated example, the rail head wiper 130 is installed relative to MSR 100 such that the rail head wiping operation succeeds the rail web wiping operation, although such arrangement is not necessary to practice the concept described in the present disclosure. Additionally, rail head wiper 130 may be made selectively deployable to engage and disengage rail head 22 in concert with the engagement and disengagement of rail web wiper pads 120a and 120b with rail web 25.
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Engagement mechanism 160 may include a pivot pin 420 that extends through pivot bore 104 on mounting bracket 105 and through pivot bores 117a and 117b on respective caliper arms 110a and 110b and may be held in place by a retaining pin 412. Further, engagement mechanism 160 may include a sliding pin 420 that extends through clevis bore 153b, proximal linkage bores 156a and 156b in respective linkages 154a and 154b, clevis bore 153a and slider slot 103 and may be held in place by a retaining fastener 422. Additionally, engagement mechanism 160 may include caliper arm pins 405a and 405b that extend through respective linkage bores 117a and 117b and respective distal linkage bores 158a and 158b and may be held in place by respective retaining pins 407a and 407b. In certain embodiments, retaining pins 407a, 407b and 412 may be readily removed and caliper arms 110a and 110b can be removed thereby, such as for replacement of web wiper pads 120a and 120b and other maintenance tasks.
In certain embodiments, caliper arms 110a and 110b may be elastically preloaded into the retraction state, such as by a spring 107. Thus, removal of pressure from pneumatic actuator 105 may result in placing MSR 100 in its retraction state, but by the elastic force of spring 107 as opposed to pneumatically induced force. However, certain embodiments may deploy actuators that are pneumatically controlled in both directions.
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Pneumatic pressure to operate MSRs 100a and 100b, i.e., one for each rail of a railroad track, may be derived from a compressor 60, which may be a system compressor that may be regulated downwards as necessary to operate mechanical sand removal system 500. A pneumatic line may connect compressor 60 to a pneumatic valve 70 located in operator cabin 15. Pneumatic valve 70 may be connected to MSRs 100a and 100b through one or more pneumatic lines with pneumatic pressure therein dictated by the state of pneumatic valve 70. Application of pressure through pneumatic valve 70 is applied to actuators 150 and the force is transferred to engagement mechanisms 160 to rotate the rail web wiper pads towards the rail web 25. Removal of pressure through pneumatic valve 70 retracts actuators 150 and engagement mechanisms 160 rotate the rail web wiper pads 120a and 120b away from the rail web 25. In certain embodiments, the retracted state is made default by an elastic force, such as by spring 107.
Much of industry occurs on railroad tracks and some of that industry is established in regions of the Globe at which shifting sand is commonplace. Mining is such an industry where mined material is moved by rail and, in Middle Eastern countries where such mining takes place, blowing sand can completely cover the railroad tracks on which that material movement relies. Sand plows have been developed that remove a vast majority of the offending sand but may leave sand that has built up in the rail web. The concept described herein completes a railroad track clearing technique that removes sand that has built up in the rail web.
Unless explicitly excluded, the use of the singular to describe a component, structure, or operation does not exclude the use of plural such components, structures, or operations or their equivalents. The use of the terms “a” and “an” and “the” and “at least one” or the term “one or more,” and similar referents in the context of describing the concept described in the present disclosure (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. The use of the term “at least one” followed by a list of one or more items (for example, “at least one of A and B” or one or more of A and B″) is to be construed to mean one item selected from the listed items (A or B) or any combination of two or more of the listed items (A and B; A, A and B; A, B and B), unless otherwise indicated herein or clearly contradicted by context. Similarly, as used herein, the word “or” refers to any possible permutation of a set of items. For example, the phrase “A, B, or C” refers to at least one of A, B, C, or any combination thereof, such as any of: A; B; C; A and B; A and C; B and C; A, B, and C; or multiple of any item such as A and A; B, B, and C; A, A, B, C, and C; etc.
Additionally, it is to be understood that terms such as “left,” “right,” “top,” “bottom,” “front,” “rear,” “side,” “height,” “length,” “width,” “upper,” “lower,” “interior,” “exterior,” “inner,” “outer,” and the like that may be used herein, merely describe points of reference and do not necessarily limit embodiments of the disclosed subject matter to any particular orientation or configuration. Furthermore, terms such as “first,” “second,” “third,” etc., merely identify one of a number of portions, components, points of reference, operations and/or functions as described herein, and likewise do not necessarily limit embodiments of the disclosed subject matter to any particular configuration or orientation.
The descriptions above are intended to illustrate possible implementations of concept described in the present disclosure and are not restrictive. Many variations, modifications and alternatives will become apparent to the skilled artisan upon review of this disclosure. For example, components equivalent to those shown and described may be substituted therefore, elements and methods individually described may be combined, and elements described as discrete may be distributed across many components. The scope of the concept described in this disclosure should therefore be determined not with reference to the description above, but with reference to the appended claims, along with their full range of equivalents.
This application claims the benefit of priority under 35 U.S.C. § 119(e) from U.S. Provisional Patent Application No. 63/423,045 entitled “Mechanical Sand Removal,” filed Nov. 6, 2022. The disclosure of that provisional patent application is incorporated herein by reference in its entirety.
Number | Date | Country | |
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63423045 | Nov 2022 | US |