Rail train sandblasting device

Abstract

The present application relates to the field of anti-skid technology for rail vehicles, and discloses a rail train sandblasting device. In the present application, the rail train sandblasting device includes: a sandblasting tube, a sandblasting nozzle, a recovery tube, a screening box, and a circulation tube. The rail train sandblasting device of the present application changes the technical solution of recycling the recovered sand into a sand storage box by a traditional recycling device, but recycles the recovered sand into the sandblasting tube for reuse instead of storing it in the sand storage box, thereby preventing the recovered sand from polluting the sand storage box, thereby realizing the recycling of sand and reducing the consumption of natural resources.

Description

Technical Field

[0001] The present application relates to the technical field of anti-skid of rail vehicles, for example, to a sandblasting device for rail vehicles. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] During operation, trains often encounter weather conditions such as climbing slopes, braking, or heavy rain. The train wheels are prone to slipping, resulting in the train's inability to exert normal traction, or causing traffic accidents due to the extended braking distance of the train. At this time, sandblasting equipment is needed to sandblast between the wheels and the rails to apply friction. At this stage, a certain space must be set up in the train to store sand, but there is no equipment for sand recycling. Even the few recycling solutions have the following technical problems: the recovered sand is collected in the sandbox without being fully processed, the processing effect is not thorough, and there will still be pollution problems. For example, the recovered sand is highly humid and contains impurities that may clog the sand discharge pipe. Summary of the Invention

[0004] The present application provides a rail train sandblasting device, which changes the technical solution of the traditional recycling device that recycles the recovered sand into a sand storage box. Instead, it recycles the recovered sand into a sandblasting tube for reuse instead of storing it in a sand storage box, thereby preventing the recovered sand from contaminating the sand storage box, thereby realizing the recycling of sand and reducing the consumption of natural resources.

[0005] A rail train sandblasting device, comprising: a sandblasting tube, a sandblasting nozzle, a recovery tube, a screening box, and a circulation tube;

[0006] Sandblasting hose, used to transport sand;

[0007] A sandblasting nozzle, connected to the sandblasting hose, sprays sand onto the rails;

[0008] a recovery pipe to collect spilled sand;

[0009] Screening box, connected to the recovery pipe, separates sand and impurities;

[0010] The circulation pipe is connected to the screening box at one end and the sandblasting pipe at the other end.

[0011] In some embodiments, the screening box includes: a box body, a screener, a sand collecting trough, a dust outlet pipe, and an exhaust fan;

[0012] The box body is connected with the recovery pipe;

[0013] The sifter is installed in the box to separate dust and sand;

[0014] The sand collecting trough is located at the bottom of the box and connected to the circulation pipe;

[0015] The dust outlet pipe is installed on the box body and is opposite to the recovery pipe;

[0016] The exhaust fan is installed on the dust outlet pipe.

[0017] In some embodiments, the screener includes: a plurality of corrugated plates, a base plate, and a recovery port;

[0018] A plurality of corrugated plates are longitudinally and spaced apart from each other in the box body, and are arranged close to the recovery pipe, with the length direction being parallel to the air flow direction of the recovery pipe entering the box body.

[0019] The base plate is provided on the upper portion of the corrugated plate, is integrally connected to the plurality of corrugated plates, and is connected to the inner wall of the box;

[0020] The recovery port is provided on the box body and connected to the recovery pipe. The corrugated plate is provided inside the recovery port and the projections of the plurality of corrugated plates on the cross section of the recovery port cover the recovery port.

[0021] The cross-sectional area of ​​the air flow channel inside the box body is larger than the cross-sectional area of ​​the air flow channel inside the recovery pipe.

[0022] In some embodiments, the circulation pipe includes: a first solenoid valve, a second solenoid valve;

[0023] A first solenoid valve is provided on the circulation pipe;

[0024] The second solenoid valve is provided on the circulation pipe at the outlet end of the first solenoid valve; wherein,

[0025] When either one of the first solenoid valve and the second solenoid valve is opened, the other is closed.

[0026] In some embodiments, a slow-release component is provided on the circulation pipe at the outlet end of the second solenoid valve, and the slow-release component includes: a housing, a sand inlet, and a sand outlet;

[0027] a shell having a cavity therein for accommodating sand;

[0028] The sand inlet is located on the upper part of the shell;

[0029] The sand outlet is arranged at the lower part of the shell, and the cross-sectional area of ​​the internal channel of the sand outlet is smaller than the cross-sectional area of ​​the internal channel of the sand inlet.

[0030] In some embodiments, the end of the recovery pipe is provided with a sand suction nozzle, and the sand suction nozzle includes one or more of the following:

[0031] The opening of the sand suction nozzle is oval;

[0032] The direction of the sand suction nozzle opening is at a 45° angle to the direction of the rails;

[0033] The height of the midpoint of the sand suction nozzle opening is equal to the height of the upper end surface of the rail;

[0034] The midpoint of the sand suction nozzle opening is close to the contact point between the wheel and the rail.

[0035] In some embodiments, the rail train sandblasting device further comprises: a sand storage box, a sand discharge pipe, a sand discharge device, a sand receiving hopper, an air blowing device, and an air blowing pipe;

[0036] The sand storage box is fixed to the train through a bracket and has a sand storage cavity inside;

[0037] A sand discharge pipe is arranged at the bottom of the sand storage box;

[0038] The sand discharge device is arranged on the sand discharge pipe to discharge the sand from the sand storage box;

[0039] The sand receiving hopper is fixedly arranged at the lower part of the sand discharge pipe and connected to the sand blasting pipe;

[0040] The blowing device is arranged on the sand storage box or the train through a bracket;

[0041] One end of the air blowing pipe is connected to the air blowing device, and the other end is connected to the sand receiving hopper.

[0042] In some embodiments, the sand discharging device includes: a discharging roller, a driving component, a plurality of sand storage chambers, a slow-release tube, and a slow-release hole;

[0043] The discharging roller is rotatably arranged on the sand discharging pipe;

[0044] The driving component is fixed on the sand discharge pipe or train to drive the discharge roller to rotate;

[0045] Multiple sand storage chambers are evenly arranged on the surface of the discharge roller;

[0046] A slow-release tube is sleeved on the discharge roller;

[0047] The number and position of the slow-release holes correspond one-to-one to the sand storage cavity, connecting the corresponding sand storage cavity and the external space, and the cross-sectional area of ​​the slow-release holes is smaller than the cross-sectional area of ​​the sand storage cavity.

[0048] In some embodiments, the sand producing device further comprises: a leak-proof plate;

[0049] The anti-leakage plate is arranged on the inner wall of the sand discharge pipe, close to the discharge roller and close to the inner wall of the sand discharge pipe, and the side close to the discharge roller is arc-shaped;

[0050] In some embodiments, the sifter further comprises: a heating device;

[0051] The heating device is arranged on the upper part of the base plate and heats the base plate and the corrugated plate.

[0052] The rail train sandblasting device provided in this application can achieve the following technical effects:

[0053] The traditional recycling device recycles the recovered sand into the sand storage box. Instead, the recovered sand is recycled into the sand blasting tube for reuse instead of being stored in the sand storage box. This prevents the recovered sand from contaminating the sand storage box, thus achieving the recycling of sand and reducing the consumption of natural resources.

[0054] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0056] Figure 1 This is a schematic diagram of the overall assembly structure of a rail train sandblasting device provided by an embodiment of the present disclosure;

[0057] Figure 2 This is another schematic side view of the assembly structure of a rail train sandblasting device provided by an embodiment of the present disclosure;

[0058] Figure 3 Schematic diagram of the internal structure of the screening box provided by the embodiment of the present disclosure;

[0059] Figure 4 is a bottom view schematic diagram of a sieving device provided by an embodiment of the present disclosure;

[0060] Figure 5 This is a schematic diagram of the location of the recovery pipe provided in an embodiment of the present disclosure;

[0061] Figure 6 is a schematic side view of a sand storage box provided by an embodiment of the present disclosure;

[0062] Figure 7 It is a schematic structural diagram of the sand production device provided in an embodiment of the present disclosure.

[0063] Figure 8 It is a schematic diagram of the cross-sectional structure of the sand production device provided in an embodiment of the present disclosure.

[0064] Reference numerals:

[0065] 11. Sand storage box; 111. Sand discharge pipe; 112. Sand receiving hopper; 113. Driving component; 114. Discharging roller; 115. Slow-release pipe; 116. Sand storage chamber; 117. Slow-release hole; 118. Leakage-proof plate; 12. Wheels; 13. Rails; 14. Recovery pipe; 15. Screening box; 151. Heating device; 152. Base plate; 153. Corrugated plate; 154. Sand collecting trough; 155. Box body; 16. Dust discharge pipe; 161. Exhaust fan; 17. Sandblasting pipe; 171. Sandblasting nozzle; 18. Circulation pipe; 181. First solenoid valve; 182. Second solenoid valve; 183. Slow-release component; 19. Blowing device; 20. Blowing pipe. DETAILED DESCRIPTION

[0066] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0067] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0068] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to having a specific orientation, or to being constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure may be understood based on the specific circumstances.

[0069] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0070] Unless otherwise stated, the term "plurality" means two or more.

[0071] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0072] Combine Figure 1 、 2 As shown, the embodiment of the present disclosure provides a rail train sandblasting device, comprising: a sandblasting tube 17, a sandblasting nozzle 171, a recovery tube 14, a screening box 15, and a circulation tube 18;

[0073] The sandblasting tube 17 is used to transport sand; it is made of a metal round tube with a smooth inner wall to facilitate blowing sand without generating retained sand. The sand is transported from the sand storage box 11 to the sandblasting nozzle 171 and can be fixed on the train by a pipe rack.

[0074] The sandblasting nozzle 171 is connected to the sandblasting tube 17 to spray sand onto the rail 13. It can be integrally formed with the sandblasting tube 17, or it can be made of a separately designed section of pipe and then connected to the sandblasting tube 17. The sandblasting nozzle 171 is as close to the rail 13 as possible. The higher the height, the more sand will splash and the more wasteful it will be. The sandblasting nozzle 171 is a tubular member, and the angle between its axis and the horizontal plane or the plane on the rail 13 is ≤30°. The larger the angle, the greater the longitudinal kinetic energy of the sand, and the more likely it is to bounce and splash. The opening of the sandblasting nozzle 171 faces vertically downward or perpendicular to the plane on the rail 13, that is, the end face of the opening of the sandblasting nozzle 171 is horizontal, and can be fixed to the train by a pipe rack.

[0075] The recovery pipe 14 collects the spilled sand; it is made of a metal round tube and can be fixed to the train through a pipe rack. A coarse filter can be set on the opening at the lower end of the recovery pipe 14 to prevent the inhalation of larger impurities and allow sand and gravel to pass through.

[0076] The screening box 15 is connected to the recovery pipe 14 to separate sand and impurities; the wheel 12 will crush the gravel after rolling over the sand, generating dust particles. Light dust particles are not easy to remain on the rails 13 and are easily blown away by the wind during the sandblasting process, so their utilization value is not great. Therefore, the light dust impurities can be filtered out to retain heavy, large-grained gravel.

[0077] The circulation pipe 18 is connected to the screening box 15 at one end and to the sandblasting pipe 17 at the other end. The sand and gravel in the sandbox are generally artificial sand, and its particle size and humidity are precisely screened and produced. The circulation device in the prior art often connects the circulation pipe 18 to the sand storage box 11. This solution greatly increases the risk of contamination of the sand storage box 11. The filtering devices used on trains in the prior art often do not have the functions and performance of the manufacturer's large-scale screening machines and dryers, and the treatment of recovered sand is not sufficient. There is a very high risk of recycling untreated sand into the sand storage box 11, such as agglomeration, adhesion to the inner wall, powder clogging valves, clogging pipes, etc., while the present application puts the recovered sand back into use directly after preliminary screening, and does not store the recovered sand, thereby eliminating the risk of recovered sand contaminating the sand storage box 11.

[0078] The rail train sandblasting device provided by the embodiment of the present disclosure changes the technical solution of the traditional recycling device to recycle the recovered sand into the sand storage box 11. Instead, the recovered sand is recycled into the sandblasting tube 17 for reuse, and is not stored in the sand storage box 11, thereby preventing the recovered sand from contaminating the sand storage box 11, thereby realizing the recycling of sand and reducing the consumption of natural resources.

[0079] like Figure 3 In some embodiments, the screening box 15 includes: a box body 155, a screener, a sand collecting trough 154, a dust outlet pipe 16, and an exhaust fan 161;

[0080] The box body 155 is connected to the recovery pipe 14; the lower part of the box body 155 is a rectangular box body 155, and the upper part is an arc-shaped cylindrical top. The left side is connected to the air intake hood, and the air intake hood is connected to the recovery pipe 14. The cross-sectional area of ​​the internal channel of the air intake hood gradually increases from left to right.

[0081] A sifter, located in the box 155, separates dust and sand;

[0082] The sand collecting trough 154 is provided at the lower part of the box body 155 and is connected to the circulation pipe 18;

[0083] The dust outlet pipe 16 is provided on the box body 155 and is arranged opposite to the recovery pipe 14;

[0084] The exhaust fan 161 is provided on the dust outlet pipe. The exhaust fan 161 is built into the dust outlet pipe 16 and provides a power source for negative pressure adsorption of the recovery pipe 14.

[0085] When the exhaust fan 161 is working, the air in the screening box 15 and the recovery pipe 14 is extracted and discharged from the dust outlet pipe 16. The lower end of the recovery pipe 14 absorbs and carries away the sand splashed in the air, enters the screening box 15, and is separated by the sifter. The impurities are discharged by the exhaust fan 161, and the sand falls into the sand collecting trough 154 and enters the sandblasting pipe 17 from the circulation pipe 18.

[0086] like Figure 4 , in some embodiments, the sifter includes: a plurality of corrugated plates 153, a base plate 152, and a recovery port;

[0087] Multiple corrugated plates 153 are longitudinally and spaced apart within the housing 155, positioned near the recovery pipe 14. Their length is parallel to the direction of airflow from the recovery pipe 14 into the housing 155. The corrugated plates 153 do not obstruct the airflow, but rather bend it. Due to inertia, sand collides with the plates 153. Repeated collisions slow the sand and, simultaneously, the airflow, causing the sand to fall under gravity into the sand collection trough 154.

[0088] The base plate 152 is provided on the upper portion of the corrugated plates 153 and is integrally connected to the plurality of corrugated plates 153 and is connected to the inner wall of the box body 155;

[0089] The recovery port is provided on the box body 155 and is connected to the recovery pipe 14. The corrugated plate 153 is provided inside the recovery port and the projections of the multiple corrugated plates 153 on the cross section of the recovery port cover the recovery port.

[0090] The cross-sectional area of ​​the air flow channel inside the recovery pipe 14 is S1;

[0091] The cross-sectional area S2 of the air flow channel inside the box 155;

[0092] The cross-sectional area of ​​the air flow channel inside the dust outlet pipe 16 is S3;

[0093] Among them, S1<S3<S2.

[0094] When the flow rate is constant, the larger the cross-sectional area, the smaller the air flow rate. The area of ​​the recovery pipe 14 is the smallest, and its adsorption capacity is the strongest, which can adsorb and collect sand. After the air flow enters the box 155, the space suddenly increases and the air flow speed decreases. It will not be enough to continue to adsorb and carry away sand and gravel, but it can take away light dust impurities.

[0095] The box body 155 is also provided with a dust outlet, which is connected to the dust outlet pipe 16. The horizontal height of the dust outlet is higher than the height of the recovery port. Optionally, the height of the lower edge of the dust outlet is higher than the height of the upper edge of the recovery port, which facilitates the separation of sand and dust impurities.

[0096] like Figure 2 , in some embodiments, the circulation pipe 18 includes: a first solenoid valve 181, a second solenoid valve 182;

[0097] A first solenoid valve 181 is provided on the circulation pipe 18;

[0098] The second solenoid valve 182 is provided on the circulation pipe 18 at the outlet end of the first solenoid valve 181;

[0099] When either the first solenoid valve 181 or the second solenoid valve 182 is open, the other is closed.

[0100] The circulation pipe 18 is connected to the sandblasting pipe 17. The inner diameter of the circulation pipe 18 is smaller than the inner diameter of the sandblasting pipe 17 and the recovery pipe 14. If there are no two solenoid valves, when the exhaust fan 161 is started, a small amount of airflow will enter the box 155 from the sandblasting pipe 17. The cyclic opening and closing of the two solenoid valves can not only block the airflow from the circulation pipe 18 into the box 155, but also does not affect the sand falling from the circulation pipe 18 into the sandblasting pipe 17.

[0101] like Figure 2 In some embodiments, a slow-release component 183 is provided on the circulation pipe 18 at the outlet end of the second solenoid valve 182, and the slow-release component 183 includes: a shell, a sand inlet, and a sand outlet;

[0102] a shell having a cavity therein for accommodating sand;

[0103] The sand inlet is located on the upper part of the shell;

[0104] The sand outlet is arranged at the lower part of the shell, and the cross-sectional area of ​​the internal channel of the sand outlet is smaller than the cross-sectional area of ​​the internal channel of the sand inlet.

[0105] Since the two solenoid valves are opened and closed cyclically, the sand will fall in sections, making the sand blasting uneven. The slow-release component 183 can alleviate or solve this problem. The sand will be temporarily stored in the cavity inside the shell and then gradually fall from the sand outlet.

[0106] like Figure 5 In some embodiments, the end of the recovery pipe 14 is provided with a sand suction nozzle, and the sand suction nozzle includes one or more of the following:

[0107] The opening of the sand suction nozzle is elliptical; the range is larger and the adsorption capacity is stronger;

[0108] The opening of the sand suction nozzle is oriented at a 45° angle to the direction of the rail 13; it faces the direction of the sand splashing to enhance the suction effect;

[0109] The height of the midpoint of the sand suction nozzle opening is equal to the height of the upper end surface of the rail 13; it is consistent with the landing point and the starting point of the bounce of the sand, making it easier to absorb the sand.

[0110] The midpoint of the sand suction nozzle opening is close to the contact point between the wheel 12 and the rail 13. The distance is close, making it easier to suck sand.

[0111] like Figure 1 、 6 In some embodiments, the rail train sandblasting device further includes: a sand storage box 11, a sand discharge pipe 111, a sand discharge device, a sand receiving hopper 112, an air blowing device 19, and an air blowing pipe 20;

[0112] In some embodiments, two sand receiving hoppers 112 are provided and arranged side by side below the sand discharge pipe 111 .

[0113] The sand storage box 11 is fixed to the train via a bracket and has a sand storage cavity inside;

[0114] The sand discharge pipe 111 is arranged at the bottom of the sand storage box 11; the sand discharge pipe 111 is a rectangular pipe.

[0115] The sand discharge device is provided on the sand discharge pipe 111 to discharge the sand from the sand storage box 11;

[0116] The sand receiving hopper 112 is fixedly arranged at the lower part of the sand discharge pipe 111 and connected to the sand blasting pipe 17;

[0117] The blowing device 19 is arranged on the sand storage box 11 or the train through a bracket; the blowing device 19 is a blower.

[0118] One end of the air blowing pipe 20 is connected to the air blowing device 19 , and the other end is connected to the sand receiving hopper 112 .

[0119] The air blowing device 19 injects air into the sand receiving hopper 112 , and the air enters the sandblasting tube 17 and increases the air flow rate in the sandblasting tube 17 . The high-speed flowing air drives the sand to move in the sandblasting tube 17 .

[0120] like Figure 7 、 8 In some embodiments, the sand discharging device includes: a discharging roller 114, a driving component 113, a plurality of sand storage chambers 116, a slow-release tube 115, and a slow-release hole 117;

[0121] The discharge roller 114 is rotatably mounted on the sand discharge pipe 111 ; the roller is a cylindrical structure.

[0122] The driving component 113 is fixedly mounted on the sand discharge pipe 111 or the train to drive the discharge roller 114 to rotate. The driving component 113 is a rotary driving mechanism, such as a motor.

[0123] A plurality of sand storage cavities 116 are evenly arranged on the surface of the discharge roller 114 ; the sand storage cavities 116 are cylindrical troughs.

[0124] The slow-release tube 115 is sleeved on the discharging roller 114 ; the slow-release tube 115 is a round tube.

[0125] The number and position of the slow-release holes 117 correspond to each other in the sand storage chamber 116, connecting the corresponding sand storage chamber 116 with the external space. The cross-sectional area of ​​the slow-release holes 117 is smaller than the cross-sectional area of ​​the sand storage chamber 116. The slow-release holes 117 are circular holes.

[0126] The slow-release holes 117 slow down the flow rate of the sand in the sand storage chamber 116 so that the sand is sprayed onto the rails 13 more evenly.

[0127] like Figure 8 , in some embodiments, the sand producing device further includes: a leak-proof plate 118;

[0128] The anti-leakage plate 118 is arranged on the inner wall of the sand discharge pipe 111, close to the discharge roller 114 and close to the inner wall of the sand discharge pipe 111, and the side surface close to the discharge roller 114 is arc-shaped;

[0129] like Figure 3 In some embodiments, the sifter further includes: a heating device 151 ; the heating device 151 may also heat the substrate 152 by means of a built-in heating tube or heating wire in the substrate 152 .

[0130] The heating device 151 is arranged on the upper part of the base plate 152 to heat the base plate 152 and the corrugated plate 153. The heating device 151 can also be a cast aluminum heating plate, which is tightly attached to each other or coated with a heat conductive material.

[0131] If there is moisture on the surface of the rail 13 , the humidity of the gravel will increase, causing it to adhere to the pipe wall. The high-speed airflow will take away the moisture from the gravel, and the heating device 151 can further evaporate the moisture on the gravel after heating the corrugated plate 153 .

[0132] The corrugated plate 153 and the base plate 152 are integrally formed using an aluminum block.

[0133] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A rail train sandblasting device, characterized in that: include: Sandblasting hose, used to deliver sand; A sandblasting nozzle, connected to a sandblasting hose, sprays sand onto the rails; a recovery tube to collect spilled sand; Screening box, connected to the recovery pipe, to separate sand and impurities; A circulation pipe, one end of which is connected to the screening box, and the other end is connected to the sandblasting pipe; as well as, The screening box comprises: A box body connected with a recovery pipe; The sifter is installed in the box to separate dust and sand; The sand collecting trough is arranged at the lower part of the box and connected with the circulation pipe; The dust outlet pipe is arranged on the box body and is arranged opposite to the recovery pipe; an exhaust fan, arranged on the dust outlet pipe; and The sifter comprises: A plurality of corrugated plates are longitudinally and spaced apart from each other in the box, and are arranged close to the recovery pipe, with the length direction parallel to the air flow direction of the recovery pipe entering the box. A base plate is disposed on the upper portion of the corrugated plate, integrally connected to the plurality of corrugated plates, and connected to the inner wall of the box; The recovery port is arranged on the box body and connected to the recovery pipe. The corrugated plate is arranged inside the recovery port and the projections of the multiple corrugated plates on the cross section of the recovery port cover the recovery port; wherein, The cross-sectional area of ​​the air flow channel inside the box body is larger than the cross-sectional area of ​​the air flow channel inside the recovery pipe.

2. The rail vehicle sandblasting device according to claim 1, characterized in that: The circulation pipe comprises: A first solenoid valve is arranged on the circulation pipe; The second solenoid valve is arranged on the circulation pipe at the outlet end of the first solenoid valve; wherein, When either one of the first solenoid valve and the second solenoid valve is opened, the other one is closed.

3. The rail vehicle sandblasting device according to claim 2, characterized in that: A slow-release component is provided on the circulation pipeline at the outlet end of the second solenoid valve, and the slow-release component includes: A shell body having a cavity inside for containing sand; A sand inlet, arranged at the upper part of the shell; The sand outlet is arranged at the lower part of the shell body, and the cross-sectional area of ​​the internal passage of the sand outlet is smaller than the cross-sectional area of ​​the internal passage of the sand inlet.

4. The rail vehicle sandblasting device according to claim 1, characterized in that: The end of the recovery pipe is provided with a sand suction nozzle, and the sand suction nozzle includes one or more of the following: The opening of the sand suction nozzle is oval; The direction of the opening of the sand suction nozzle is at an angle of 45° to the direction of the rails; The height of the midpoint of the sand suction nozzle opening is equal to the height of the upper end surface of the rail; The midpoint of the sand suction nozzle opening is close to the contact point between the wheel and the rail.

5. The rail vehicle sandblasting device according to claim 4, characterized in that: Also includes: The sand storage box is fixed on the train through a bracket and has a sand storage cavity inside; A sand discharge pipe is arranged at the bottom of the sand storage box; The sand discharge device is arranged on the sand discharge pipe to discharge the sand from the sand storage box; The sand receiving hopper is fixedly arranged at the lower part of the sand discharge pipe and connected to the sand blasting pipe; The blowing device is arranged on the sand storage box or the train through a bracket; One end of the air blowing pipe is connected to the air blowing device, and the other end is connected to the sand receiving hopper.

6. The rail vehicle sandblasting device according to claim 5, characterized in that: The sand producing device comprises: The discharging roller is rotatably arranged on the sand discharging pipe; The driving component is fixedly arranged on the sand discharge pipe or the train to drive the discharge roller to rotate; Multiple sand storage chambers are evenly arranged on the surface of the discharge roller; A slow-release tube is sleeved on the discharging roller; The number and position of the slow-release holes correspond to the sand storage cavity one by one, connecting the corresponding sand storage cavity and the external space, and the cross-sectional area of ​​the slow-release holes is smaller than the cross-sectional area of ​​the sand storage cavity.

7. The rail vehicle sandblasting device according to claim 6, characterized in that: The sand producing device also includes: The anti-leakage plate is arranged on the inner wall of the sand discharge pipe, close to the discharge roller and the inner wall of the sand discharge pipe, and the side surface close to the discharge roller is arc-shaped.

8. The rail vehicle sandblasting device according to claim 1, characterized in that: The sifter also includes: The heating device is arranged on the upper part of the substrate.

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