Rail transit sand scattering device and sand scattering method

Abstract

The invention belongs to the technical field of rail transit, and particularly relates to a rail transit sand scattering device and a sand scattering method.The rail transit sand scattering device comprises a sand storage box, the front end and the rear end of the sand storage box are movably connected with the front sides and the rear sides of two first rotating rods correspondingly, and the two first rotating rods are each fixedly connected with two first gears. Through mutual cooperation of the first motor, the first rotating rod, the first gear, the first chain wheel and the second chain wheel, the second rotating rod can be driven to rotate, and through rotation of the second rotating rod, sand in the sand storage box can evenly fall into the discharging box under the action of a sand outlet roller arranged on the second rotating rod; sand can be uniformly scattered to the traveling track under the cooperation of the discharging box and the sand outlet pipe, so that the sand scattering process is achieved, the operation is simple and convenient, and when sand scattering does not need to be carried out, the sand can be blocked only by stopping rotation of the sand outlet roller, and continuous falling of the sand is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail transit, and in particular relates to a rail transit sand spreading device and a sand spreading method. Background Art

[0002] Rail transit relies on the traction and braking adhesion friction generated by the interaction between wheels and rails to achieve train operation. With the construction of high-speed railways, the traction load of electric locomotives is increasing, and improving the adhesion performance of locomotives has become a vital issue. The sand spreading device is a railway vehicle equipment that can use sand to increase the friction between wheels and rails, shorten the braking distance and increase the friction of climbing.

[0003] Problems with existing technologies:

[0004] 1. Most existing sand spreading devices lack the ability to crush and screen the sand during use, which results in the presence of lumps and larger particles of sand in the sand during use, which can easily cause the device to become blocked during the subsequent sand spreading process.

[0005] 2. The existing sand spreading device needs to be powered by a pipeline connected to the train air brake system, so the structure is very complex, the control is not convenient, the installation cost is high, and once damaged, it will cause safety risks to the entire brake system. Summary of the invention

[0006] The object of the present invention is to provide a rail transit sand spreading device and a sand spreading method, which can solve the problem that most existing sand spreading devices lack the crushing and screening of sand during use, which leads to the presence of lumps and larger particles of sand in the sand during use, which easily causes the device to be blocked during the subsequent sand spreading process.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A rail transit sand spreading device and sand spreading method, comprising a sand storage box, wherein the front and rear ends of the sand storage box are respectively movably connected to the front and rear sides of two rotating rods, the two rotating rods are fixedly connected to two gears, and the two corresponding gears on the left and right sides are meshed and driven, the front and rear ends of the rotating rod on the left are fixedly connected to sprockets, the two sprockets are connected to two sprockets through two chains, the two sprockets are respectively fixedly connected to the front and rear ends of the rotating rod, the rotating rod is fixedly connected to a sand outlet roller, and the front and rear ends of the sand outlet roller are respectively movably connected to the front and rear ends of the sand storage box;

[0009] A sand screening mechanism is provided on the upper side of the sand storage box, and the front and rear sides of the sand screening mechanism are clamped with two mounting plates with two holes provided inside, and the relatively close ends of the two mounting plates are respectively fixedly connected to the front and rear ends of the sand screening frame, and a crushing mechanism is provided on the upper end of the sand screening mechanism, and the front and rear ends of the crushing mechanism are fixedly connected with sprocket three, the two sprocket threes are respectively connected to the two sprocket fours through two chains, and the two sprocket fours are respectively fixedly connected to the front and rear ends of the sand screening mechanism.

[0010] The sand storage box is slidably connected to the front and rear ends of the cover plate through guide grooves provided on both the front and rear side surfaces thereof. The left end of the cover plate passes through the left side wall of the sand storage box and is fixedly connected to two L-shaped plates. The right ends of the two L-shaped plates are fixedly connected to two electric hydraulic rods respectively. A pulling handle is provided at the left end of the sand screening frame. A screen is provided at the lower end of the sand screening frame. A plurality of sand outlet grooves are evenly provided inside the sand outlet roller.

[0011] The right ends of the two electric hydraulic rods are fixedly connected to fixed blocks, and the relatively close ends of the two fixed blocks are respectively fixedly connected to the front and rear ends of the sand storage box. The sand storage box is fixedly connected to a discharge box through a discharge port opened at its lower end, and the lower end of the discharge box is fixedly connected to a sand discharge pipe.

[0012] A plurality of breaking rods are arranged on the parts of the two rotating rods 1 located inside the sand storage box. The rear end of the rotating rod 1 on the right side is fixedly connected to the output shaft of the motor 1. The motor 1 is fixedly connected to the rear end of the sand storage box through the motor frame arranged thereon.

[0013] The crushing mechanism includes a shell, the front and rear ends of the shell are respectively fixedly connected to the front and rear sides of the upper end of the sand screening mechanism, the upper end of the shell is provided with a feeding port, the lower end of the shell is provided with an opening, the front and rear ends of the shell are respectively movably connected to the front and rear sides of two rotating rods three, and the front and rear ends of the rotating rod three on the left side are respectively fixedly connected to the two sprockets three.

[0014] The two rotating rods three are fixedly connected to the parts inside the shell with crushing rollers, and the two rotating rods three are fixedly connected to the parts outside the shell with two gears two, and the two corresponding gears two on the left and right sides are meshed and transmitted, and the rear end of the rotating rod three on the right side is fixedly connected to the output shaft of the motor two, and the motor two is fixedly connected to the rear end of the shell through another motor frame arranged thereon.

[0015] The sand screening mechanism includes two fixed frames, the relatively close ends of the two fixed frames are fixedly connected to the front and rear ends of the shell, the relatively close sides of the lower ends of the two fixed frames are fixedly connected to the front and rear ends of the sand storage box, the two fixed frames are movably connected to two Z-shaped push rods, and the relatively distant ends of the two Z-shaped push rods are fixedly connected to two sprocket wheels four.

[0016] The relatively close ends of the two Z-shaped push rods are movably connected to two pushing frames with push grooves provided inside, and the relatively close ends of the two pushing frames are fixedly connected to the front and rear ends of the concave frame respectively. The relatively close ends inside the concave frames are fixedly connected with concave clamping plates, and the two concave clamping plates are clamped with two mounting plates with two sockets provided inside through two limit pins provided thereon.

[0017] The four limit pins are all sleeved with springs, the upper ends of the four springs are respectively fixedly connected to the upper sides of the four limit pins, the lower ends of the four springs are respectively fixedly connected to the two concave clamping plates, the upper and lower ends of the two pushing frames are fixedly connected to the limit sliders, the four limit sliders are respectively slidably connected to the four limit rods, the four limit rods are grouped in pairs, and their left and right ends are respectively fixedly connected to the four support frames, and the relatively close ends of the four support frames are respectively fixedly connected to the front and rear ends of the sand storage box.

[0018] A method for using a rail transit sand spreading device comprises the following steps:

[0019] a1. When using the device to spread sand, first start the two electric hydraulic rods and drive the cover plate to move to the left with the cooperation of the two L-shaped plates until the upper end of the sand storage box is opened. Then start the motor 2 to drive the right rotating rod 3 to rotate. The rotation of the right rotating rod 3 can drive the two crushing rollers to rotate relative to each other with the cooperation of the four gears 2 and the left rotating rod 3. In this process, the two Z-shaped push rods can be driven to rotate with the cooperation of the sprocket and the sprocket 4. The rotation of the two Z-shaped push rods can drive the sand screening frame to shake in the left and right directions with the cooperation of the push frame, the concave frame, the concave card plate, the limit pin, the mounting plate, the limit slider and the limit rod. At this time, the sand to be spread is put into the shell, and then the sand can be crushed by the relative rotation of the two crushing rollers. The crushed sand will fall into the sand screening frame. At this time, the sand can be screened by the shaking of the sand screening frame. The sand that passes the screening falls directly into the sand storage box, and the sand that fails to pass the screening remains in the sand screening frame.

[0020] a2. After the screening and crushing of the sand is completed, the upper end of the sand storage box is closed with the cooperation of the provided electric hydraulic rod, the L-shaped plate and the cover plate, and then the motor 1 is started to drive the right rotating rod 1 to rotate. The rotation of the right rotating rod 1 can drive the left rotating rod 1 to rotate relatively under the action of the provided four gears 1. At this time, the sand inside the sand storage box can be stirred under the action of a number of crushing rods provided on the two rotating rods 1, so as to avoid the phenomenon of agglomeration caused by the sand being stored therein for a long time. During the rotation of the left rotating rod 1, the rotating rod 2 can be driven to rotate under the action of the provided sprocket 1 and the sprocket 2. Through the rotation of the rotating rod 2, the sand inside the sand storage box can be evenly dropped into the inside of the discharge box under the action of the provided sand outlet roller, and spread to the driving track through the discharge box and the sand outlet pipe, thereby achieving the sand spreading process.

[0021] The technical effects achieved by the present invention are:

[0022] 1. The present invention can drive the rotating rod 2 to rotate by cooperating with each other through the arrangement of the motor 1, the rotating rod 1, the gear 1, the sprocket 1 and the sprocket 2. The rotating rod 2 rotates, and under the action of the sand-discharging roller arranged thereon, the sand inside the sand storage box can evenly fall into the inside of the discharge box, and is evenly spread onto the driving track through the cooperation of the discharge box and the sand-discharging pipe, so as to achieve the sand-spreading process. The operation is simple and convenient, and when there is no need to spread sand, the sand can be blocked by stopping the rotation of the sand-discharging roller to prevent the sand from falling continuously. In the process of spreading sand, the two rotating rods 1 rotate, and under the action of the several crushing rods arranged thereon, the sand inside the sand storage box can be stirred and crushed, thereby preventing the sand from being stored in the sand storage box for a long time and forming lumps, thereby affecting the subsequent sand-spreading process.

[0023] 2. The present invention can crush the sand before adding sand to the sand storage box through the cooperation between the motor 2, the gear 2, the rotating rod 3 and the crushing roller, effectively avoiding the situation that large particles and agglomerated sand exist in the sand, which will affect the subsequent sand spreading process. In the process of crushing the sand, the rotation of the rotating rod 3 can drive the Z-shaped rotating rod to rotate under the cooperation of the sprocket 3 and the sprocket 4. The rotation of the Z-shaped rotating rod can drive the sand screening frame to shake in the left and right directions under the cooperation of the set pushing frame, the limit slider, the limit rod, the concave frame, the concave clamping plate, the limit pin and the mounting plate, so as to achieve the screening of the crushed sand and effectively reduce the situation that agglomerates and large particles of sand exist in the sand. After the sand screening is completed, the sand screening frame can be conveniently removed from the device with the cooperation of the concave clamping plate, the limit pin and the spring, so that the sand remaining in it can be conveniently processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the main stereoscopic structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the main cross-sectional three-dimensional structure of the present invention;

[0026] Figure 3 It is a left-view stereoscopic structural schematic diagram of the present invention;

[0027] Figure 4 It is a rear-view stereoscopic structural schematic diagram of the present invention;

[0028] Figure 5 This is a schematic diagram of the main three-dimensional structure of the sand screening frame in the present invention;

[0029] Figure 6 It is a schematic diagram of the main cross-sectional three-dimensional structure of the crushing mechanism in the present invention;

[0030] Figure 7 It is a right-side perspective structural diagram of the crushing mechanism in the present invention;

[0031] Figure 8 It is a left-side stereoscopic structural schematic diagram of the sand screening mechanism in the present invention;

[0032] Fig. 9 It is a schematic diagram of the main three-dimensional structure of the sand screening mechanism in the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] 1. Sand storage box; 2. Feeding box; 3. Sand discharge pipe; 4. Sand screening mechanism; 41. Support frame; 42. Fixed frame; 43. Limit rod; 44. Limit slider; 45. Concave card plate; 46. Z-shaped push rod; 47. Push frame; 48. Limit pin; 49. Spring; 410. Concave frame; 5. Electric hydraulic rod; 6. L-shaped plate; 7. Cover plate; 8. Sand screening frame; 9. Crushing mechanism; 91. Shell; 92. Crushing roller; 93. Rotating rod three; 94. Gear two; 95. Motor two; 10. Sprocket three; 11. Sprocket four; 12. Gear one; 13. Rotating rod one; 14. Sprocket one; 15. Fixed block; 16. Sand discharge roller; 17. Sprocket two; 18. Rotating rod two; 19. Crushing rod; 20. Motor one; 21. Mounting plate. DETAILED DESCRIPTION

[0035] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0036] like Figure 1-9 As shown, a rail transit sand spreading device and sand spreading method include a sand storage box 1, the front and rear ends of the sand storage box 1 are respectively movably connected to the front and rear sides of two rotating rods 13, the two rotating rods 13 are fixedly connected to two gears 12, and the two gears 12 corresponding to the left and right sides are meshed and driven, the front and rear ends of the left rotating rod 13 are fixedly connected to sprockets 14, the two sprockets 14 are transmission-connected to two sprockets 17 through two chains, the two sprockets 17 are respectively fixedly connected to the front and rear ends of the rotating rod 18, and the rotating rod 18 is meshed and driven. 8 is fixedly connected with a sand-discharging roller 16, and the front and rear ends of the sand-discharging roller 16 are movably connected with the front and rear ends of the sand storage box 1 respectively. The rotation of the right rotating rod 13 can achieve the effect of driving the left rotating rod 13 to rotate under the action of the four gears 12, and the rotation of the left rotating rod 13 can drive the rotating rod 2 18 to rotate under the action of the sprocket 14 and the sprocket 2 17. At this time, under the action of the sand-discharging roller 16 arranged on the rotating rod 2 18, the effect of evenly discharging the sand inside the sand storage box 1 can be achieved;

[0037] A sand screening mechanism 4 is provided on the upper side of the sand storage box 1. The front and rear sides of the sand screening mechanism 4 are snap-connected with two mounting plates 21 with two sockets provided inside. The relatively close ends of the two mounting plates 21 are respectively fixedly connected with the front and rear ends of the sand screening frame 8. A crushing mechanism 9 is provided on the upper end of the sand screening mechanism 4. The front and rear ends of the crushing mechanism 9 are fixedly connected with sprocket three 10. The two sprocket three 10 are respectively connected to the two sprocket four 11 through two chains. The two sprocket four 11 are respectively fixedly connected to the front and rear ends of the sand screening mechanism 4. The crushing mechanism 9 can first achieve sand crushing before putting the sand into the sand storage box 1. The crushing and crushing process of the sand can avoid the presence of lumps or larger particles of sand in the sand, which may affect the subsequent sand spreading effect. In the process of crushing the sand, the sprocket three 10, the sprocket four 11, the sand screening mechanism 4 and the mounting plate 21 can cooperate to drive the sand screening frame 8 to swing in the left and right directions. At this time, the sand crushed by the crushing mechanism 9 will fall into the inside of the sand screening frame 8, so that the crushed sand can be screened by the shaking of the sand screening frame 8. When the screening is completed, the sand screening frame 8 can be removed from the sand screening mechanism 4 to conveniently process the sand that has not passed the screening inside it.

[0038] Furthermore, the sand storage box 1 is slidably connected with the front and rear ends of the cover plate 7 through the guide grooves provided on the front and rear side surfaces thereof, the left end of the cover plate 7 passes through the left side wall of the sand storage box 1 and is fixedly connected with the two L-shaped plates 6, the right ends of the two L-shaped plates 6 are fixedly connected with the two electric hydraulic rods 5, the right ends of the two electric hydraulic rods 5 are fixedly connected with the fixing blocks 15, the relatively close ends of the two fixing blocks 15 are fixedly connected with the front and rear ends of the sand storage box 1, the sand storage box 1 is fixedly connected with the discharge box 2 through the discharge port provided at the lower end thereof, the lower end of the discharge box 2 is fixedly connected with the sand discharge pipe 3, a plurality of breaking rods 19 are provided on the parts of the two rotating rods 13 located inside the sand storage box 1, the rear end of the right rotating rod 13 is fixedly connected with the output shaft of the motor 20, and the motor 20 is fixedly connected with the output shaft of the motor 20 through the electric motor provided thereon. The frame is fixedly connected to the rear end of the sand storage box 1. The cooperation between the arranged electric hydraulic rod 5, the L-shaped plate 6 and the fixed block 15 can drive the cover plate 7 to move in the left and right directions, thereby achieving the opening and closing process of the upper end of the sand storage box 1. The sand dropped by the sand discharge roller 16 will enter the interior of the sand discharge pipe 3 through the discharge box 2, and be scattered to the driving track through the sand discharge pipe 3, thereby realizing the sand spreading process. The rotation of the output shaft of the motor 20 can achieve the effect of driving the right rotating rod 13 to rotate. During the rotation of the two rotating rods 13, the sand inside the sand storage box 1 can be stirred under the action of a number of breaking rods 19 arranged thereon, effectively avoiding the sand from being stored in the sand storage box 1 for a long time and causing caking, thereby affecting the subsequent sand spreading.

[0039] Furthermore, the crushing mechanism 9 includes a shell 91, the front and rear ends of the shell 91 are respectively fixedly connected to the front and rear sides of the upper end of the sand screening mechanism 4, the upper end of the shell 91 is provided with a feeding port, the lower end of the shell 91 is provided with an opening, the front and rear ends of the shell 91 are respectively movably connected to the front and rear sides of two rotating rods 3 93, the front and rear ends of the left rotating rod 3 93 are respectively fixedly connected to the two sprocket wheels 3 10, the parts of the two rotating rods 3 93 located inside the shell 91 are fixedly connected to the crushing rollers 92, the parts of the two rotating rods 3 93 located outside the shell 91 are fixedly connected to the two gears 2 94, and the two gears 2 94 corresponding to the left and right sides are meshed with each other. The transmission is combined, the rear end of the right rotating rod three 93 is fixedly connected to the output shaft of the motor two 95, and the motor two 95 is fixedly connected to the rear end of the shell 91 through another motor frame arranged thereon. The rotation of the output shaft of the motor two 95 drives the right rotating rod three 93 to rotate. At this time, under the action of the four gears two 94, the left rotating rod three 93 can be driven to rotate relatively. Through the relative rotation of the two rotating rods three 93, the sand entering the inside of the shell 91 can be crushed under the action of the two crushing rollers 92. In the process of driving the left rotating rod three 93 to rotate, the two sprockets three 10 can be driven to rotate accordingly.

[0040] The sand screening mechanism 4 includes two fixed frames 42, the relatively close ends of the two fixed frames 42 are respectively fixedly connected to the front and rear ends of the shell 91, the relatively close sides of the lower ends of the two fixed frames 42 are respectively fixedly connected to the front and rear ends of the sand storage box 1, the two fixed frames 42 are respectively movably connected to two Z-shaped push rods 46, the relatively far ends of the two Z-shaped push rods 46 are respectively fixedly connected to two sprocket wheels 411, the relatively close ends of the two Z-shaped push rods 46 are respectively movably connected to two push frames 47 each having a push groove provided therein, and the two push frames 47 are respectively movably connected to the two push frames 47. The relatively close ends are respectively fixedly connected to the front and rear ends of the concave frame 410, and the relatively close ends inside the concave frame 410 are fixedly connected with concave card plates 45, and the two concave card plates 45 are respectively connected to the two mounting plates 21 with two holes provided inside through the two limit pins 48 provided thereon. In the process of crushing the sand, the rotation of the two sprocket wheels three 10 can achieve the effect of driving the two Z-shaped push rods 46 to rotate with the cooperation of the two sprocket wheels four 11. The push frame 47, the concave frame 410, the concave card plate 45, the limit pin 48 and the mounting plate 21 can drive the sand screening frame 8 to reciprocate in the left and right directions, so as to achieve the screening process of the sand falling into it. The fixed frame 42 can support the Z-shaped push rod 46 and the shell 91. The four limit pins 48 are all sleeved with springs 49. The upper and lower ends of the two push frames 47 are fixedly connected to the limit sliders 44. The four limit sliders 44 are respectively connected to the four limit rods 43 sliding connection, four limit rods 43 are grouped in pairs, and their left and right ends are fixedly connected to the four support frames 41 respectively, and the relatively close ends of the four support frames 41 are fixedly connected to the front and rear ends of the sand storage box 1 respectively, and the installation and disassembly process of the sand screening frame 8 can be quickly achieved through the mutual cooperation between the set concave clamping plate 45, the limit pin 48, the spring 49 and the mounting plate 21, and the mutual cooperation between the set support frame 41, the limit slider 44 and the limit rod 43 can limit the movement direction of the push frame 47.

[0041] The method of use of the present invention is:

[0042] When using the device for spreading sand, firstly, the two electric hydraulic rods 5 are started and the cover plate 7 is driven to move to the left with the cooperation of the two L-shaped plates 6 until the upper end of the sand storage box 1 is opened. Then, the motor 2 95 is started to drive the right rotating rod 3 93 to rotate. The rotation of the right rotating rod 3 93 can drive the two crushing rollers 92 to rotate relative to each other with the cooperation of the four gears 2 94 and the left rotating rod 3 93. In this process, the two Z-shaped push rods 46 can be driven to rotate with the cooperation of the sprocket 3 10 and the sprocket 4 11. The rotation of the sand screening frame 8 can drive the sand screening frame 8 to shake in the left and right directions under the cooperation of the set pushing frame 47, the concave frame 410, the concave card plate 45, the limit pin 48, the mounting plate 21, the limit slider 44 and the limit rod 43. At this time, the sand to be sprinkled is put into the interior of the shell 91, and then the sand can be crushed by the relative rotation of the two crushing rollers 92. The crushed sand will fall into the interior of the sand screening frame 8. At this time, the sand screening process can be achieved by shaking the sand screening frame 8. The sand that passes the screening falls directly into the interior of the sand storage box 1, and the sand that fails to pass the screening remains in the interior of the sand screening frame 8.

[0043] After the screening and crushing of the sand is completed, the upper end of the sand storage box 1 is closed with the cooperation of the set electric hydraulic rod 5, the L-shaped plate 6 and the cover plate 7, and then the motor 20 is started to drive the right rotating rod 13 to rotate. The rotation of the right rotating rod 13 can drive the left rotating rod 13 to rotate relatively under the action of the set four gears 12. At this time, the sand inside the sand storage box 1 can be stirred under the action of a number of crushing rods 19 arranged on the two rotating rods 13 to avoid the phenomenon of agglomeration caused by long-term storage of sand inside. During the rotation of the left rotating rod 13, the rotating rod 2 18 can be driven to rotate under the action of the set sprocket 14 and the sprocket 2 17. Through the rotation of the rotating rod 2 18, the sand inside the sand storage box 1 can be evenly dropped into the inside of the discharge box 2 under the action of the set sand outlet roller 16, and sprinkled to the driving track through the discharge box 2 and the sand outlet pipe 3, thereby achieving the sand spreading process.

[0044] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A rail transit sand spreading device, comprising a sand storage box (1), characterized in that: The front and rear ends of the sand storage box (1) are respectively movably connected to the front and rear sides of two rotating rods (13), and the two rotating rods (13) are fixedly connected to two gears (12), and the two gears (12) on the left and right sides are meshed and driven. The front and rear ends of the left rotating rod (13) are fixedly connected to sprockets (14), and the two sprockets (14) are connected to two sprockets (17) through two chains. The two sprockets (17) are respectively fixedly connected to the front and rear ends of the rotating rod (18), and the rotating rod (18) is fixedly connected to a sand outlet roller (16), and the front and rear ends of the sand outlet roller (16) are respectively movably connected to the front and rear ends of the sand storage box (1); A sand screening mechanism (4) is arranged on the upper side of the sand storage box (1), and the front and rear sides of the sand screening mechanism (4) are clamped with two mounting plates (21) each having two sockets therein, and the relatively close ends of the two mounting plates (21) are respectively fixedly connected to the front and rear ends of the sand screening frame (8), and a crushing mechanism (9) is arranged on the upper end of the sand screening mechanism (4), and the front and rear ends of the crushing mechanism (9) are both fixedly connected to sprocket three (10), and the two sprocket threes (10) are respectively transmission-connected to two sprocket fours (11) through two chains, and the two sprocket fours (11) are respectively fixedly connected to the front and rear ends of the sand screening mechanism (4).

2. A rail transit sand spreading device according to claim 1, characterized in that: The sand storage box (1) is slidably connected to the front and rear ends of the cover plate (7) through guide grooves provided on both the front and rear side surfaces thereof; the left end of the cover plate (7) passes through the left side wall of the sand storage box (1) and is fixedly connected to the two L-shaped plates (6); the right ends of the two L-shaped plates (6) are fixedly connected to the two electric hydraulic rods (5) respectively.

3. A rail transit sand spreading device according to claim 2, characterized in that: The right ends of the two electric hydraulic rods (5) are fixedly connected to a fixing block (15), and the relatively close ends of the two fixing blocks (15) are respectively fixedly connected to the front and rear ends of the sand storage box (1), and the sand storage box (1) is fixedly connected to a discharge box (2) through a discharge port opened at its lower end, and the lower end of the discharge box (2) is fixedly connected to a sand discharge pipe (3).

4. A rail transit sand spreading device according to claim 1, characterized in that: A plurality of crushing rods (19) are provided on the parts of the two rotating rods (13) located inside the sand storage box (1), and the rear end of the rotating rod (13) on the right side is fixedly connected to the output shaft of the motor (20), and the motor (20) is fixedly connected to the rear end of the sand storage box (1) through a motor frame provided thereon.

5. The rail transit sand spreading device according to claim 1, characterized in that: The crushing mechanism (9) comprises a shell (91), the front and rear ends of the shell (91) are respectively fixedly connected to the front and rear sides of the upper end of the sand screening mechanism (4), the upper end of the shell (91) is provided with a feeding port, the lower end of the shell (91) is provided with an opening, the front and rear ends of the shell (91) are respectively movably connected to the front and rear sides of two rotating rods (93), and the front and rear ends of the rotating rod (93) on the left are respectively fixedly connected to the two sprocket wheels (10).

6. A rail transit sand spreading device according to claim 5, characterized in that: The two rotating rods (93) are fixedly connected to the parts inside the shell (91) with a crushing roller (92), and the two rotating rods (93) are fixedly connected to the parts outside the shell (91) with two gears (94), and the two corresponding gears (94) on the left and right sides are meshed and transmitted, and the rear end of the right rotating rod (93) is fixedly connected to the output shaft of the motor (95), and the motor (95) is fixedly connected to the rear end of the shell (91) through another motor frame arranged thereon.

7. A rail transit sand spreading device according to claim 5, characterized in that: The sand screening mechanism (4) comprises two fixing frames (42), the relatively close ends of the two fixing frames (42) are respectively fixedly connected to the front and rear ends of the shell (91), the relatively close sides of the lower ends of the two fixing frames (42) are respectively fixedly connected to the front and rear ends of the sand storage box (1), the two fixing frames (42) are respectively movably connected to two Z-shaped push rods (46), and the relatively far ends of the two Z-shaped push rods (46) are respectively fixedly connected to two sprocket wheels four (11).

8. A rail transit sand spreading device according to claim 7, characterized in that: The relatively close ends of the two Z-shaped push rods (46) are movably connected to two push frames (47) each having a push groove therein, and the relatively close ends of the two push frames (47) are fixedly connected to the front and rear ends of the concave frame (410) respectively. The relatively close ends inside the concave frame (410) are fixedly connected to concave clamping plates (45), and the two concave clamping plates (45) are respectively clamped to two mounting plates (21) each having two sockets therein through two limit pins (48) arranged thereon.

9. A rail transit sand spreading device according to claim 8, characterized in that: The four limit pins (48) are sleeved with springs (49), the upper and lower ends of the two pushing frames (47) are fixedly connected to the limit sliders (44), the four limit sliders (44) are slidably connected to the four limit rods (43), the four limit rods (43) are grouped in pairs, and the left and right ends are fixedly connected to the four support frames (41), and the relatively close ends of the four support frames (41) are fixedly connected to the front and rear ends of the sand storage box (1).

10. A method for using a rail transit sand spreading device according to claim 9, comprising the following steps: a1. When the device is used for spreading sand, firstly, the two electric hydraulic rods (5) are started and the cover plate (7) is driven to move to the left in cooperation with the two L-shaped plates (6) until the upper end of the sand storage box (1) is opened. Then, the motor 2 (95) is started to drive the right rotating rod 3 (93) to rotate. The rotation of the right rotating rod 3 (93) can drive the two crushers (92) to rotate relative to each other in cooperation with the four gears 2 (94) and the left rotating rod 3 (93). In this process, the two Z-shaped push rods (46) can be driven to rotate in cooperation with the sprocket wheel (10) and the sprocket wheel 4 (11). The rotation of the sand screening frame (8) can drive the sand screening frame (8) to shake in the left and right directions under the cooperation of the arranged pushing frame (47), the concave frame (410), the concave card plate (45), the limit pin (48), the mounting plate (21), the limit slider (44) and the limit rod (43). At this time, the sand to be sprinkled is placed in the interior of the shell (91), and then the sand can be crushed by the relative rotation of the two crushing rollers (92). The crushed sand will fall into the interior of the sand screening frame (8). At this time, the sand screening can be achieved by shaking the sand screening frame (8). The sand that passes the screening directly falls into the interior of the sand storage box (1), and the sand that fails to pass the screening remains in the interior of the sand screening frame (8); a2. After the sand is screened and crushed, the upper end of the sand storage box (1) is closed with the cooperation of the electric hydraulic rod (5), the L-shaped plate (6) and the cover plate (7). Then, the motor (20) is started to drive the right rotating rod (13) to rotate. The rotation of the right rotating rod (13) can drive the left rotating rod (13) to rotate relatively under the action of the four gears (12). At this time, the sand storage box (1) can be closed with the action of the plurality of crushing rods (19) provided on the two rotating rods (13). ) to prevent the sand from agglomerating due to long-term storage therein. During the rotation of the left rotating rod (13), the sprocket (14) and the sprocket (17) can drive the rotating rod (18) to rotate. The rotation of the rotating rod (18) and the sand discharge roller (16) can make the sand in the sand storage box (1) evenly fall into the discharge box (2) and be scattered to the vehicle track through the discharge box (2) and the sand discharge pipe (3), thereby achieving the sand spreading process.

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