Railway sand and wind prevention device applicable to quicksand sections

Abstract

The present application provides a railway sand and wind prevention device applicable to quicksand sections, which relates to the technical field of environmental governance. The prevention device includes a ventilation and conduction type subgrade and a ventilation and conduction mechanism. The ventilation and conduction type subgrade is provided with a sand transportation channel extending in its width direction, and both ends of the sand transportation channel in its extending direction are openings; the ventilation and conduction mechanism includes a frame, a wind blade, a coupling, a wire reel, a pulling rope and a gate; the frame is fixed on the ventilation and conduction type subgrade, the wind blade is rotatably installed on the frame, the wind blade is connected to the wire reel through the coupling, and the wire reel is rotatably matched with the frame; one end of the pulling rope is fixed on the wire reel, and the other end is connected to the gate; the wind blade is used for rotating under the action of wind force to lift the gate through the pulling rope; the gate is used for opening or closing one port of the sand transportation channel. It integrates sand collection, sand guiding and sand transportation, is not easy to generate sand accumulation on both sides of the subgrade, and has high driving safety.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental governance, and more particularly, to a railway sand and wind prevention device applicable to quicksand sections. Background Art

[0002] With the gradual improvement of the railway transportation network system in western China, the railway mileage passing through desert areas has been increasing year by year, and the sand and wind hazards along the line have become increasingly severe, even affecting the safe operation of trains. In particular, in recent years, with the optimization and improvement of the western railway backbone system and the interconnection of important stations, some lines have to pass through or extend into the desert hinterland, significantly increasing the difficulty of railway construction and the cost of sand and wind protection. The opening of many desert railways has facilitated people's travel. In the construction of many desert railways, in order to ensure the smoothness of the sand transportation channel as much as possible, the railway subgrade construction more often chooses the method of "bridge instead of road" to allow the sand and wind flow to pass through smoothly, but this has also increased the investment in railway construction funds invisibly. Previous designs for desert railway subgrades more often focused on "sand transportation bridges", but there were relatively few designs for desert railway subgrade models with various combined forms, and the corresponding targeted research on the sand prevention system around the subgrade also needs to be improved. Summary of the Invention

[0003] The purpose of the present invention is to provide a railway sand and wind prevention device applicable to quicksand sections, which can design various combined forms of railway subgrades according to local conditions and formulate a reasonable comprehensive prevention system, filling the gap in railway construction in sandy areas under the conditions of "high wind energy and high sand transportation rate", ensuring the smooth sand transportation of the railway subgrade while saving part of the railway construction investment cost, and maximizing the efficiency of the comprehensive sand prevention system to ensure the safe and stable operation of railways in sandy areas.

[0004] The embodiments of the present invention are implemented as follows:

[0005] The present invention provides a railway sand and wind prevention device applicable to quicksand sections, including:

[0006] A ventilation and conduction subgrade and a ventilation and conduction mechanism. The ventilation and conduction subgrade is provided with a sand transportation channel extending in its width direction, and both ends of the sand transportation channel in its extending direction are openings; the ventilation and conduction mechanism includes a frame, a wind blade, a coupling, a wire reel, a pulling rope, and a gate; the frame is fixed on the ventilation and conduction subgrade, the wind blade is rotatably installed on the frame, the wind blade is connected to the wire reel through the coupling, and the wire reel is rotatably matched with the frame; one end of the pulling rope is fixed on the wire reel, and the other end is connected to the gate; the wind blade is used to rotate under the action of wind force to lift the gate through the pulling rope; the gate is used to open or close one port of the sand transportation channel.

[0007] In an alternative embodiment, the ventilation and conduction mechanism further includes a gear shifting unit, the gear shifting unit includes a driving rod, a mounting plate, a plurality of blocking rods, a plurality of first limiting blocks and a plurality of first elastic members, the driving rod is connected to the gate; the mounting plate is fixed to one side of the ventilation and conduction type roadbed, the plurality of blocking rods are rotatably connected to the mounting plate, the plurality of blocking rods are arranged at intervals in the vertical direction and are all located on the lifting path of the driving rod; one ends of the plurality of first elastic members are all connected to the mounting plate, the other ends of the plurality of first elastic members are respectively connected to the corresponding blocking rods, and are used to make the blocking rods have a tendency to rotate downward; the plurality of first limiting blocks are all connected to the mounting plate, and the plurality of first limiting blocks are in one-to-one correspondence with the plurality of blocking rods to limit the blocking rods from rotating downward under the action of the first elastic members.

[0008] In an alternative embodiment, the number of the driving rods is multiple, and the multiple driving rods are arranged at intervals in the vertical direction; the first distance between any adjacent blocking rods is equal, the second distance between any adjacent driving rods is equal, and the first distance is equal to the second distance.

[0009] In an alternative embodiment, the driving rod is rotatably connected to the gate, a second limiting block and a second elastic member are installed on the gate, the second limiting block is used to abut against the driving rod to limit the driving rod from rotating upward; the second elastic member is connected to the second limiting block and is used to make the driving rod have a tendency to rotate upward to abut against the second limiting block.

[0010] In an alternative embodiment, the coupling includes a telescopic device, an external tooth rod and an internal tooth sleeve, the telescopic device is installed on the frame, the external tooth rod is connected to the telescopic end of the telescopic device, one end of the external tooth rod is slidably matched with the wind blade, and the external tooth rod and the wind blade are relatively fixed in the circumferential direction of the wind blade; the internal tooth sleeve is rotatably matched with the frame around the axis of the wind blade, the external tooth rod is inserted into or pulled out of the internal tooth sleeve under the drive of the telescopic device, and when the external tooth rod is inserted into the internal tooth sleeve, the external tooth rod meshes with the internal tooth sleeve; the wire reel is fixedly connected to the internal tooth sleeve.

[0011] In an alternative embodiment, the internal tooth sleeve includes a sleeve body and a plurality of internal teeth, the sleeve body has a connecting inner hole, the sleeve body is rotatably matched with the frame, the plurality of internal teeth are installed on the hole wall of the connecting inner hole and are arranged at intervals in the circumferential direction of the sleeve body; each internal tooth has a first end and a second end that are opposite to each other in the axial direction of the connecting inner hole, the first end is close to the external tooth rod, and both sides of the first end of the internal tooth in the circumferential direction of the connecting inner hole are provided with inclined surfaces to guide the external tooth rod to mesh with the plurality of internal teeth through the inclined surfaces.

[0012] In an alternative embodiment, the sleeve has a socket for inserting the external tooth bar, and there is a distance between the end surface where the first end of the internal teeth is located and the socket, so that a rotation prevention cylinder section is formed at the part of the sleeve between the first end and the socket; the rotation prevention cylinder section is provided with rotation prevention insertion holes;

[0013] A rotation prevention pin and the third elastic member are arranged on the frame. The rotation prevention pin includes a coaxial rotation prevention section and a force transmission section. The rotation prevention section is slidably matched with the frame in the vertical direction, and the rotation prevention section is relatively fixed with the frame in the circumferential direction of the connecting inner hole; the third elastic member abuts against the rotation prevention section for making the force transmission section have a tendency to insert into the rotation prevention insertion hole; the outer peripheral surface of the force transmission section is set as a conical surface. When the rotation prevention pin is inserted into the rotation prevention insertion hole under the elastic force of the third elastic member, at least part of the rotation prevention section is inserted into the rotation prevention insertion hole;

[0014] A release ring is arranged on the external tooth bar. The release ring is used for abutting against the force transmission section when the external tooth bar is inserted into the rotation prevention cylinder section, so that the rotation prevention pin has a tendency to move out of the rotation prevention insertion hole; and when the release ring drives the rotation prevention pin to retract into the rotation prevention insertion hole, the rotation prevention section completely moves out of the rotation prevention insertion hole.

[0015] In an alternative embodiment, the cross-section of the sand transportation channel is circular, oval or regular polygon.

[0016] In an alternative embodiment, the railway sand and wind prevention device applicable to quicksand sections further includes a subgrade peripheral sand prevention unit. The subgrade peripheral sand prevention unit includes a sand retention feather row, a sand retention fence, a wind guiding plate, a sand interception ditch, a vegetation area, a sand retention dike and a covering area arranged in sequence. The covering area is arranged close to the ventilation and transportation subgrade.

[0017] In an alternative embodiment, a pipeline is buried inside the ventilation and transportation subgrade, and the lumen of the pipeline is set as the sand transportation channel.

[0018] The beneficial effects of the embodiments of the present invention are:

[0019] In summary, the railway sand and wind prevention device applicable to quicksand sections provided in this embodiment realizes diversified functions of sand blocking, sand transportation, and sand guiding by setting a sand transportation channel on the subgrade and using a ventilation and guiding mechanism to cooperate with the subgrade. During service, initially, the gate is in the position of closing the sand transportation channel. When the wind force is small, the wind and sand are small, and the amount of sand movement with the wind is small. A small amount of sand accumulates on the side of the subgrade and near the gate, preventing the accumulated sand from entering the sand transportation channel. When the wind force gradually increases, the wind drives the wind blades to rotate. The wind blades drive the wire reel to rotate through the coupling. The rotation of the wire reel drives the pulling rope to rotate. The pulling rope is wound outside the wire reel, thereby lifting the gate and opening the gate. After the gate is opened, the sand transportation channel is opened, and the "narrow tube acceleration" effect of the sand transportation channel is used to accelerate the smooth passage of quicksand, achieving both the reduction of wind energy and the guarantee of driving safety, and also playing the role of sand blocking and sand transportation. In this way, the accumulation of sand on both sides of the subgrade is also avoided, further improving driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 Structural schematic diagram of a perspective view of the railway sand and wind prevention device applicable to quicksand sections of the embodiment of the present invention;

[0022] Figure 2 Structural schematic diagram of another perspective view of the railway sand and wind prevention device applicable to quicksand sections of the embodiment of the present invention;

[0023] Figure 3 For Figure 2 Partial enlarged structural schematic diagram in;

[0024] Figure 4 Structural schematic diagram of a state of the coupling of the embodiment of the present invention;

[0025] Figure 5 Structural schematic diagram of another state of the coupling of the embodiment of the present invention.

[0026] ICON:

[0027] 100 - Ventilation and conduction type roadbed; 110 - Pipeline; 120 - Sand transportation channel; 200 - Ventilation and conduction mechanism; 210 - Frame; 220 - Wind blade; 230 - Coupling; 231 - Expander; 232 - Outer tooth rod; 233 - Inner tooth sleeve; 2331 - Sleeve body; 2332 - Inner teeth; 2333 - Anti - rotation cylinder section; 2334 - Anti - rotation jack; 234 - Sliding seat; 235 - Bearing; 236 - Release ring; 240 - Wire reel; 250 - Pulling rope; 260 - Gate; 270 - Gear shifting unit; 271 - Driving rod; 272 - Mounting plate; 273 - Stop rod; 274 - First limit block; 275 - First elastic member; 276 - Second limit block; 277 - Second elastic member; 280 - Anti - rotation pin; 281 - Anti - rotation section; 282 - Force - transmission section; 290 - Third elastic member. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for differential description and should not be construed as indicating or implying relative importance.

[0032] In addition, terms such as "horizontal" and "vertical" do not require the components to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0033] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0034] At present, the accumulated sand accumulates on both sides of the roadbed and is likely to move to the roadbed surface under the action of wind, thus affecting driving safety. In order to improve the above situation, in the prior art, ventilation pipes are usually arranged on the roadbed. The ventilation pipes can play a role in sand discharge, enabling the accumulated sand to pass through the channel and avoiding accumulation. However, the inventor found in the research that when the wind force is small, the accumulated sand cannot pass through the channel but accumulates in the channel. In this way, it is easy to cause the blockage of the ventilation pipe, thereby reducing the sand transportation efficiency and having a poor sand transportation effect.

[0035] In view of this, the designer provides a railway sand prevention and control device applicable to flowing sand sections, which can adaptively adjust the sand transportation state according to the wind force situation. When the wind force is small, the accumulated sand accumulates on both sides of the roadbed and does not enter the sand transportation channel 120, and the blockage of the sand transportation channel 120 will not be caused; when the wind force increases, the sand transportation channel 120 is adaptively opened, and the accumulated sand is quickly passed through the sand transportation channel 120 by using the venturi effect, realizing the transportation and guiding of sand and improving driving safety.

[0036] Please combine Figures 1 - 5In this embodiment, the sand control device for railway sections with quicksand comprises a ventilation and conveying type roadbed 100 and a ventilation and conveying mechanism 200. The ventilation and conveying type roadbed 100 is provided with a sand conveying channel 120 extending in its width direction, and both ends of the sand conveying channel 120 in its extension direction are open; the ventilation and conveying mechanism 200 comprises a frame 210, a fan blade 220, a coupling 230, a wire drum 240, a pull rope 250 and a gate 260; the frame 210 is fixed to the channel On the wind-conducting roadbed 100, the fan blade 220 is rotatably mounted on the frame 210. The fan blade 220 is connected to the wire drum 240 via a coupling 230, and the wire drum 240 is rotatably matched with the frame 210. One end of the pull rope 250 is fixed to the wire drum 240, and the other end is connected to the gate 260. The fan blade 220 is used to rotate under the action of wind to lift the gate 260 through the pull rope 250. The gate 260 is used to open or close one end of the sand conveying channel 120.

[0037] In this embodiment, the working principle of the sand control device for railway sections with quicksand is as follows:

[0038] During service, in the initial state, i.e., when wind speed is low, gate 260 is in a position that closes sand conveying channel 120. When wind speed is low, the wind and sand are small, and the amount of sand particles carried by the wind is small. A small amount of sand accumulates on the side of the roadbed and near gate 260, preventing the accumulated sand from entering sand conveying channel 120. As wind speed gradually increases, the wind force drives blades 220 to rotate. Blades 220, via coupling 230, rotate wire drum 240. The rotation of wire drum 240 drives pull rope 250, which is wound around wire drum 240, thereby lifting gate 260 and opening it. When gate 260 is opened, sand conveying channel 120 is opened, and the "narrow channel acceleration" effect of sand conveying channel 120 is utilized to accelerate the smooth passage of quicksand. This achieves the goal of reducing wind energy and ensuring driving safety, while also preventing sand from accumulating on both sides of the roadbed, further improving driving safety.

[0039] The following embodiments illustrate the detailed structure of the railway wind and sand prevention device applicable to quicksand sections of the present application.

[0040] In this embodiment, the cross-section of the ventilated roadbed 100 can optionally be configured as an isosceles trapezoid. This allows the width of the ventilated roadbed 100 to be inclined on both sides, preventing sand from accumulating on the width side surfaces of the ventilated roadbed 100 and from reaching the top surface through the width side surfaces, ensuring safe and reliable driving. Furthermore, during construction of the ventilated roadbed 100, a predetermined number of pipes 110 can be pre-buried within the ventilated roadbed 100. These pipes 110 can be circular, elliptical, or regular polygonal, with the lumen of these pipes 110 serving as the sand transport channel 120. This embodiment uses a single circular pipe 110 as an example for illustration. The pipeline 110 passes through the ventilated conveying roadbed 100 in the width direction of the ventilated conveying roadbed 100. The two ends of the pipeline 110 are two openings. It should be understood that the fan blade 220 can drive the two gates 260 to move at the same time, thereby realizing the synchronous opening and closing of the two ports. In this embodiment, only one fan blade 220 drives one gate 260 to control one end of the sand transport channel 120 as an example for specific introduction.

[0041] Please combine Figure 2 and Figure 3 In this embodiment, optionally, the ventilation and conveying mechanism 200 further includes a gear adjustment unit 270, which can adaptively adjust the lifting height of the gate 260 according to the wind force, so that the area of the sand conveying channel 120 opened is proportional to the wind force, that is, when the wind force is greater, the opening area of the sand conveying channel 120 is greater, thereby improving the conveying efficiency while also preventing sand from accumulating in the sand conveying channel 120.

[0042] Optionally, the gear shifting unit 270 includes multiple active rods 271 , a mounting plate 272 , multiple shifting rods 273 , multiple first limiting blocks 274 , multiple first elastic members 275 , multiple second limiting blocks 276 and multiple second elastic members 277 . It should be understood that the number of the active rod 271, the baffle rod 273, the first limit block 274, the first elastic member 275, the second limit block 276 and the second elastic member 277 can be set to be equal. In this embodiment, the number of the active rod 271, the baffle rod 273, the first limit block 274, the first elastic member 275, the second limit block 276 and the second elastic member 277 is two as an example. Obviously, in other embodiments, the number of the active rod 271, the baffle rod 273, the first limit block 274, the first elastic member 275, the second limit block 276 and the second elastic member 277 may not be limited to two. In addition, the number of the active rod 271, the baffle rod 273, the first limit block 274, the first elastic member 275, the second limit block 276 and the second elastic member 277 may also be set to unequal.

[0043] Specifically, both of the two driving rods 271 are square rods. The two driving rods 271 are rotatably installed on the gate 260, and the two driving rods 271 are arranged at intervals in the lifting direction of the gate 260, that is, vertically. At the same time, two second limit blocks 276 and two second elastic members 277 are both installed on the gate 260. Each driving rod 271 cooperates with a second limit block 276 and a second elastic member 277. The second elastic member 277 is connected to the driving rod 271 and the gate 260 at the same time, so that the driving rod 271 has a tendency to rotate downward. The second limit block 276 is located below the driving rod 271 and can limit the driving rod 271 from rotating downward. In this way, under the action of the second elastic member 277, the driving rod 271 always abuts against the second limit block 276. At this time, the driving rod 271 can be arranged perpendicular to the gate 260. When an upward external force is applied to the driving rod 271, the driving rod 271 can rotate relative to the gate 260. After the external force is removed, the second elastic member 277 can drive the driving rod 271 to rotate downward and return to its original position.

[0044] At the same time, the mounting plate 272 can be a rectangular plate. The mounting plate 272 is fixed on the width side of the ventilation and conduction subgrade 100. Two blocking rods 273, two first limit blocks 274 and two first elastic members 275 are all installed on the mounting plate 272. The two blocking rods 273 are arranged at intervals vertically. Among them, the distance between the two blocking rods 273 is the first distance, and the distance between the two driving rods 271 is the second distance. The first distance and the second distance are equal. Such a design can ensure that the two driving rods 271 respectively abut against the two blocking rods 273 at the same time. Each blocking rod 273 cooperates with a first limit block 274 and a first elastic member 275. The blocking rod 273 is rotatably connected to the mounting plate 272. The first elastic member 275 is in a stretched state. The first elastic member 275 is connected to the blocking rod 273 and the mounting plate 272. The first elastic member 275 is used to make the blocking rod 273 have a tendency to rotate downward. The first limit block 274 is located below the corresponding blocking rod 273 and can limit the blocking rod 273 from rotating downward. In this way, under the action of the first elastic member 275, the blocking rod 273 always remains in a state of abutting against the first limit block 274. When an upward external force is applied to the blocking rod 273, the blocking rod 273 can overcome the elastic force of the first elastic member 275 and rotate upward. When the external force is removed, the blocking rod 273 returns to its initial position under the elastic force of the first elastic member 275.

[0045] It should be noted that when the wind blade 220 drives the gate 260 to rise through the rope, a driving rod 271 near the upper part of the gate 260 first abuts against a stop rod 273 near the lower part of the mounting plate 272. At this time, the driving rod 271 is subjected to a downward external force and cannot rotate, while the stop rod 273 is subjected to an upward external force and can rotate. Thus, after the wind force is greater than the elastic force of the first elastic member 275 and the gravity of components such as the gate 260, the driving rod 271 can cross over the stop rod 273, and the sand transportation channel 120 is opened to a set area. During the continuous increase of the wind force, the driving rod 271 located at the upper part of the gate 260 contacts the stop rod 273 located at the upper part of the mounting plate 272. At the same time, the driving rod 271 located at the lower part of the gate 260 contacts the stop rod 273 located at the lower part of the mounting plate 272, and the two stop rods 273 cooperate to jointly limit the rise of the gate 260. When the wind force can overcome the elastic forces of the two first elastic members 275 and the gravity of the components, the gate 260 can continue to rise. With such a design, it can be avoided that the gate 260 is continuously driven to rise without the increase of the wind force. When the wind force decreases or is unable to drive the gate 260 to rise, under the gravity of the gate 260, the gate 260 descends. When the driving rod 271 contacts the stop rod 273, the driving rod 271 is subjected to an upward external force and can rotate relative to the gate 260, so as to cross over the stop rod 273 and return to the initial position.

[0046] In this embodiment, it should be noted that both the first elastic member 275 and the second elastic member 277 can be set as springs.

[0047] Please refer to Figure 2 、 Figure 4 and Figure 5, in this embodiment, optionally, the coupling 230 includes a telescopic device 231, an external tooth rod 232, and an internal tooth sleeve 233. The telescopic device 231 is installed on the frame 210, and the telescopic device 231 can be an electric screw rod, a cylinder, a hydraulic cylinder, etc. The external tooth rod 232 is connected to the telescopic end of the telescopic device 231. One end of the external tooth rod 232 is slidably engaged with the wind blade 220, and the external tooth rod 232 and the wind blade 220 are relatively fixed in the circumferential direction of the wind blade 220. For example, the external tooth rod 232 can be inserted and engaged with the rotating shaft of the wind blade 220. A square hole is provided on the rotating shaft of the wind blade 220, and a part of the external tooth rod 232 is a square rod section, and the square rod section is slidably engaged with the square hole, and the external tooth rod 232 and the wind blade 220 can rotate synchronously. The internal tooth sleeve 233 is rotatably engaged with the frame 210 around the axis of the wind blade 220. The external tooth rod 232 is inserted into or pulled out of the internal tooth sleeve 233 under the drive of the telescopic device 231. When the external tooth rod 232 is inserted into the internal tooth sleeve 233, the external tooth rod 232 meshes with the internal tooth sleeve 233, and the external tooth rod 232 is always connected to the wind blade 220; the wire reel 240 is fixedly connected to the internal tooth sleeve 233, and the torque can be transmitted to the wire reel 240 through the wind blade 220. With such a design, through the telescopic device 231, the wind blade 220 and the wire reel 240 can be combined or separated. When combined, the rotation of the wind blade 220 can drive the wire reel 240 to rotate together. When the wind blade 220 is separated from the wire reel 240, the wind blade 220 rotates independently, and the wire reel 240 does not rotate with the wind blade 220.

[0048] Meanwhile, in order to keep the gate 260 at a set height under a set wind force, neither automatically closing the sand transportation channel 120 nor continuously rising with the rotation of the wind blade 220, in this embodiment, an anti-rotation pin 280 is provided on the frame 210. When the gate 260 is at the set height and the wind force is stable at this time, then the anti-rotation pin 280 is used to cooperate with the internal tooth sleeve 233 to ensure that the internal tooth sleeve 233 does not rotate relative to the frame 210. In order to relieve the wind force received by the wind blade 220, the external tooth rod 232 is separated from the internal tooth sleeve 233, and the wind blade 220 can rotate under the action of the wind force, improving the driving safety. When the wind force decreases, the position of the anti-rotation pin 280 is adjusted to make it lose the limit on the internal tooth sleeve 233, and the internal tooth sleeve 233 can reset under the gravity of the gate 260.

[0049] Optionally, the internal gear sleeve 233 includes a sleeve body 2331 and a plurality of internal teeth 2332. The sleeve body 2331 has a connecting inner hole. The sleeve body 2331 can be rotatably fitted with the frame 210 through a bearing 235. The plurality of internal teeth 2332 are installed on the pore wall of the connecting inner hole and are arranged at intervals in the circumferential direction of the sleeve body 2331. Each internal tooth 2332 has a first end and a second end that are opposite to each other in the axial direction of the connecting inner hole. The first end is close to the external tooth rod 232. The two sides of the first end of the internal tooth 2332 in the circumferential direction of the connecting inner hole are both provided with inclined surfaces to guide the external tooth rod 232 to mesh with the plurality of internal teeth 2332 through the inclined surfaces, facilitating the switching of the external tooth rod 232 and the internal gear sleeve 233 from the separated state to the meshed state. At the same time, the sleeve body 2331 has a socket for the external tooth rod 232 to insert. There is a distance between the end surface where the first end of the internal tooth 2332 is located and the socket, so that the part of the sleeve body 2331 between the first end and the socket forms an anti-rotation cylinder section 2333. The inner diameter of the anti-rotation cylinder section 2333 is larger than the inner diameter of the cylinder section provided with the internal teeth 2332. The anti-rotation cylinder section 2333 is provided with an anti-rotation jack 2334 that penetrates the cylinder wall of the anti-rotation cylinder in the radial direction of the anti-rotation cylinder section 2333.

[0050] Meanwhile, an anti-rotation pin 280 and a third elastic member 290 are provided on the frame 210. The anti-rotation pin 280 includes a coaxial anti-rotation section 281 and a force transmission section 282. The anti-rotation section 281 is slidably engaged with the frame 210 in the vertical direction, and the anti-rotation section 281 is relatively fixed to the frame 210 in the circumferential direction of the connecting inner hole. The third elastic member 290 abuts against the anti-rotation section 281 and is used to make the force transmission section 282 have a tendency to insert into the anti-rotation insertion hole 2334. The outer peripheral surface of the force transmission section 282 is arranged as a conical surface. When the anti-rotation pin 280 is inserted into the anti-rotation insertion hole 2334 under the elastic force of the third elastic member 290, at least a part of the anti-rotation section 281 is inserted into the anti-rotation insertion hole 2334. A release ring 236 is provided on the external tooth bar 232. The release ring 236 is adjusted outside the external tooth bar 232. The release ring 236 is used to abut against the force transmission section 282 when the external tooth bar 232 is inserted into the anti-rotation cylinder section 2333, so that the anti-rotation pin 280 has a tendency to move out of the anti-rotation insertion hole 2334; and when the release ring 236 drives the force transmission section 282 of the anti-rotation pin 280 to retract into the anti-rotation insertion hole 2334, the anti-rotation section 281 completely exits the anti-rotation insertion hole 2334. With such a design, by setting an angular displacement sensor, the rotation angle of the external tooth bar 232 can be monitored in real time. When the anti-rotation insertion hole 2334 is located directly below as the reference position, when the rotation angle of the external tooth bar 232 is an integer multiple of 360°, at this time, the external tooth bar 232 exits the anti-rotation cylinder section 2333, and the release ring 236 does not block the anti-rotation pin 280. Under the action of the third elastic member 290, the anti-rotation pin 280 is inserted into the anti-rotation insertion hole 2334, so that the internal tooth sleeve 233 is fixed relative to the frame 210. When it is necessary to engage the external tooth bar 232 with the internal tooth sleeve 233, the external tooth bar 232 can be inserted into the internal tooth sleeve 233. During the insertion process, the release ring 236 can drive the anti-rotation pin 280 to retract into the anti-rotation insertion hole 2334, and during the engagement process of the external tooth bar 232 and the internal tooth sleeve 233, the release ring 236 can always keep the state of closing the anti-rotation insertion hole 2334 to prevent the anti-rotation pin 280 from affecting the rotation of the internal tooth sleeve 233. At the same time, the internal tooth sleeve 233 can rotate driven by the wind blade 220 or rotate driven by the gate 260. When the internal tooth sleeve 233 rotates, the hole wall of the anti-rotation insertion hole 2334 contacts the conical surface of the force transmission section 282, which can make the force transmission section 282 exit the anti-rotation insertion hole 2334, so as not to affect the normal rotation of the internal tooth sleeve 233.

[0051] It should be noted that the external tooth bar 232 is taken as an example of an electric lead screw for illustration. A sliding seat 234 is provided on the frame 210, and the electric lead screw pushes the sliding seat 234 to move reciprocally. A bearing 235 is installed on the sliding seat 234. The external tooth bar 232 passes through the inner ring of the bearing 235 and is in interference fit with the inner ring. In this way, the electric lead screw can drive the external tooth bar 232 to move linearly reciprocally through the sliding seat 234, and the external tooth bar 232 can also rotate freely with the wind blade 220 under the action of the bearing 235.

[0052] It should be noted that the third elastic member 290 can be a spring.

[0053] In this embodiment, optionally, the railway sand prevention and control device applicable to the quicksand section further includes a sand prevention unit outside the subgrade. The sand prevention unit outside the subgrade includes a sand retention feather row, a sand retention fence, a wind guiding plate, a sand intercepting ditch, a vegetation area, a sand retention dike, and a covering area arranged in sequence. The covering area is arranged close to the ventilation and conduction subgrade 100.

[0054] For the railway sand prevention and control device applicable to the quicksand section provided in this embodiment, driven by the wind blade 220, the gate 260 is opened, and the sand transportation channel 120 is opened. The "narrow tube acceleration" effect of the sand transportation channel 120 is utilized to accelerate the smooth passage of quicksand, achieving the effects of reducing wind energy, ensuring driving safety, and playing the roles of sand retention and sand transportation, avoiding sand accumulation on both sides of the subgrade, and further improving driving safety.

[0055] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A railway sand and wind prevention device applicable to quicksand sections, characterized in that, Comprising: A ventilation and conduction type roadbed and a ventilation and conduction mechanism. The ventilation and conduction type roadbed is provided with a sand transportation channel extending in its width direction, and both ends of the sand transportation channel in its extending direction are openings; the ventilation and conduction mechanism includes a frame, a wind blade, a coupling, a wire reel, a pulling rope, and a gate; the frame is fixed on the ventilation and conduction type roadbed, the wind blade is rotatably installed on the frame, the wind blade is connected to the wire reel through the coupling, and the wire reel is rotatably matched with the frame; one end of the pulling rope is fixed on the wire reel, and the other end is connected to the gate; the wind blade is used for rotating under the action of wind force to lift the gate through the pulling rope; the gate is used for opening or closing one port of the sand transportation channel. The ventilation and conduction mechanism further includes a gear shifting unit, the gear shifting unit includes a driving rod, a mounting plate, a plurality of blocking rods, a plurality of first limiting blocks, and a plurality of first elastic members. The driving rod is connected to the gate; the mounting plate is fixed on one side of the ventilation and conduction type roadbed, the plurality of blocking rods are all rotatably connected to the mounting plate, the plurality of blocking rods are arranged at intervals in the vertical direction and are all located on the lifting path of the driving rod; one ends of the plurality of first elastic members are all connected to the mounting plate, and the other ends of the plurality of first elastic members are respectively connected to the corresponding blocking rods for making the blocking rods have a tendency to rotate downward; the plurality of first limiting blocks are all connected to the mounting plate, and the plurality of first limiting blocks are in one-to-one correspondence and cooperation with the plurality of blocking rods to limit the blocking rods from rotating downward under the action of the first elastic members. The number of the driving rods is a plurality, and the plurality of driving rods are arranged at intervals in the vertical direction; the first distance between any adjacent blocking rods is equal, the second distance between any adjacent driving rods is equal, and the first distance is equal to the second distance. The driving rod is rotatably connected to the gate, and a second limiting block and a second elastic member are installed on the gate. The second limiting block is used for abutting against the driving rod to limit the driving rod from rotating upward; the second elastic member is connected to the second limiting block for making the driving rod have a tendency to rotate upward to abut against the second limiting block.

2. The railway sand and wind prevention device applicable to flowing sand sections according to claim 1, characterized in that: The coupling includes a telescopic device, an external tooth rod, and an internal tooth sleeve. The telescopic device is installed on the frame, the external tooth rod is connected to the telescopic end of the telescopic device, one end of the external tooth rod is slidably matched with the wind blade, and the external tooth rod is relatively fixed with the wind blade in the circumferential direction of the wind blade; the internal tooth sleeve is rotatably matched with the frame around the axis of the wind blade, the external tooth rod is inserted into or pulled out of the internal tooth sleeve under the drive of the telescopic device, and when the external tooth rod is inserted into the internal tooth sleeve, the external tooth rod meshes with the internal tooth sleeve; the wire reel is fixedly connected to the internal tooth sleeve.

3. The railway sand and wind prevention device applicable to flowing sand sections according to claim 2, characterized in that: The internal gear sleeve includes a sleeve body and a plurality of internal teeth. The sleeve body has a connecting inner hole. The sleeve body is rotatably engaged with the frame. The plurality of internal teeth are installed on the hole wall of the connecting inner hole and are arranged at intervals in the circumferential direction of the sleeve body. Each internal tooth has a first end and a second end that are opposite to each other in the axial direction of the connecting inner hole. The first end is close to the external tooth rod. Both sides of the first end of the internal tooth in the circumferential direction of the connecting inner hole are provided with inclined surfaces to guide the external tooth rod to mesh with the plurality of internal teeth through the inclined surfaces.

4. The railway sand and wind prevention device applicable to quicksand sections according to claim 3, wherein: The sleeve body has a socket for inserting the external tooth rod. There is a distance between the end face where the first end of the internal tooth is located and the socket, so that a rotation prevention cylinder section is formed at the part of the sleeve body between the first end and the socket. The rotation prevention cylinder section is provided with a rotation prevention insertion hole. A rotation prevention pin and a third elastic member are arranged on the frame. The rotation prevention pin includes a coaxial rotation prevention section and a force transmission section. The rotation prevention section is slidably engaged with the frame in the vertical direction. The rotation prevention section is relatively fixed to the frame in the circumferential direction of the connecting inner hole. The third elastic member abuts against the rotation prevention section and is used to make the force transmission section have a tendency to insert into the rotation prevention insertion hole. The outer peripheral surface of the force transmission section is set as a conical surface. When the rotation prevention pin is inserted into the rotation prevention insertion hole under the elastic force of the third elastic member, at least part of the rotation prevention section is inserted into the rotation prevention insertion hole. A release ring is arranged on the external tooth rod. The release ring is used to abut against the force transmission section when the external tooth rod is inserted into the rotation prevention cylinder section, so that the rotation prevention pin has a tendency to move out of the rotation prevention insertion hole. And when the release ring drives the rotation prevention pin to retract into the rotation prevention insertion hole, the rotation prevention section completely exits the rotation prevention insertion hole.

5. The railway sand and wind prevention device applicable to quicksand sections according to claim 1, wherein: The cross section of the sand transportation channel is circular, elliptical or regular polygon.

6. The railway sand and wind prevention device applicable to quicksand sections according to claim 1, wherein: The railway sand and wind prevention device applicable to quicksand sections further includes a subgrade peripheral sand prevention unit. The subgrade peripheral sand prevention unit includes a sand retention feather row, a sand retention fence, a wind guiding plate, a sand intercepting ditch, a vegetation area, a sand retention dike and a covering area arranged in sequence. The covering area is arranged close to the ventilation and transportation subgrade.

7. The railway sand and wind prevention device applicable to quicksand sections according to claim 1, wherein: A pipeline is buried inside the ventilation and transportation subgrade. The lumen of the pipeline is set as the sand transportation channel.

Images