Rail train sand blasting device

Abstract

The invention relates to the technical field of skid resistance of rail vehicles, and discloses a sand blasting device for a rail train. The rail train sand blasting device comprises a sand blasting pipe, a sand blasting nozzle, a recycling pipe, a screening box and a circulating pipe, the technical scheme that a traditional circulating recycling device recycles recycled sand into a sand storage box is changed, the recycled sand is recycled into the sand blasting pipe to be repeatedly used, the recycled sand is not stored in the sand storage box, and the sand blasting efficiency is improved. And the sand storage box is prevented from being polluted by the recycled sand, so that the sand is recycled, and the consumption of natural resources is reduced.

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 the operation of the train, it often encounters weather conditions such as climbing a slope, braking or heavy rain. The wheels of the train are prone to slipping, resulting in the train being unable 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 blast the sand between the wheels and the rails to apply friction. At this stage, a certain space needs to be set up in the train to store sand, but there is no equipment for recycling sand. Even if there are a few recycling schemes, there are the following technical problems: the recovered sand is not fully processed and collected in the sand box, the treatment effect is not thorough, and there will still be pollution problems. For example, the recovered sand has high humidity 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 a traditional recycling device that recycles the recovered sand into a sand storage box. Instead, the recovered sand is recycled into a sandblasting tube for reuse instead of being stored in a sand storage box, thereby preventing the recovered sand from contaminating the sand storage box, thereby achieving 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 deliver sand;

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

[0008] a recovery tube to collect spilled sand;

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

[0010] A circulation pipe, one end of which is connected to the screening box, and the other end is connected to the sandblasting pipe.

[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] A box body connected with a recovery pipe;

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

[0014] The sand collecting trough is arranged at the lower part of the box and connected with the circulation pipe;

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

[0016] The exhaust fan is installed on the dust removal 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] 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;

[0020] 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,

[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 arranged on the circulation pipe;

[0024] The second solenoid valve is arranged 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 one is closed.

[0026] In some embodiments, 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 housing, a sand inlet, and a sand outlet;

[0027] A shell body, wherein a cavity for containing sand is provided inside;

[0028] A sand inlet, arranged at the upper part of the shell;

[0029] 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.

[0030] In some embodiments, a sand suction nozzle is provided at the end of the recovery pipe, 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 opening of the sand suction nozzle is at an angle of 45° 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 pipeline;

[0036] The sand storage box is fixed on 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 fixedly arranged on the sand discharge pipe or the 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 discharging roller;

[0047] 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.

[0048] In some embodiments, the sand discharge 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 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 recycled sand into the sand storage box. Instead, the recycled sand is recycled into the sandblasting tube for reuse instead of being stored in the sand storage box, thereby preventing the recycled sand from polluting the sand storage box. This achieves the recycling of sand and reduces 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, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

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

[0058] Figure 3 is a schematic diagram of the internal structure of the screening box provided in an embodiment of the present disclosure;

[0059] Figure 4 is a bottom view schematic diagram of a sifter provided in an embodiment of the present disclosure;

[0060] Figure 5 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 in an embodiment of the present disclosure;

[0062] Figure 7 It is a schematic diagram of the structure of the sand producing 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 removal 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. Wheel; 13. Rail; 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 contents 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 attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the 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] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "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 directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly 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 have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions 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 can be understood according to specific circumstances.

[0069] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to 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 may be combined with each other.

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

[0073] The sandblasting pipe 17 is used to transport sand; it is made of a metal round tube with a smooth inner wall, which is convenient for 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 through a pipe rack.

[0074] The sandblasting nozzle 171 is connected to the sandblasting tube 17 to spray sand on 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 waste 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 easier 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 pipe and can be fixed on 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 to produce dust particles. The 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 the heavy, large-grained gravel.

[0077] A 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 in the sandbox is generally artificial sand, and its particle size and humidity are accurately screened and produced. The circulation device in the prior art often connects the circulation pipe 18 to the sand storage box 11. This scheme 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 large screening machines and dryers of the manufacturers, and the treatment of the recovered sand is not sufficient. There is a very great risk of recycling the sand that has not been fully treated into the sand storage box 11, such as agglomeration, adhesion to the inner wall, powder clogging the valve, clogging the pipe, 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 the recovered sand contaminating the sand storage box 11.

[0078] The rail train sandblasting device provided in the embodiment of the present disclosure changes the technical solution of recycling the recovered sand into the sand storage box 11 by the traditional recycling device. Instead, the recovered sand is recycled into the sandblasting tube 17 for reuse instead of being 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 tank 154 is provided at the lower part of the box body 155 and connected to the circulation pipe 18;

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

[0084] The exhaust fan 161 is arranged on the dust removal pipe. The exhaust fan 161 is built in the dust outlet pipe 16 to provide a power source for negative pressure adsorption for 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 takes away the sand splashed in the air, and enters the screening box 15. After being 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 sand discharge pipe 111 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] A plurality of corrugated plates 153 are longitudinally and spaced apart from each other in the box 155, and are arranged close to the recovery pipe 14, with the length direction being parallel to the airflow direction from the recovery pipe 14 into the box 155. The corrugated plates 153 will not hinder the airflow, but will make the airflow bend, and the sand will collide with the corrugated plates 153 due to inertia, and repeated collisions will reduce the speed of the sand, and at the same time the airflow speed will decrease, and the sand will fall downward into the sand collecting trough 154 under the pull of gravity.

[0088] The base plate 152 is disposed on the upper part of the corrugated plate 153, connected to the plurality of corrugated plates 153 in an integral manner, and connected to the inner wall of the box body 155;

[0089] The recovery port is arranged on the box body 155 and connected to the recovery pipe 14. The corrugated plate 153 is arranged inside the recovery port and the projections of the plurality of 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 passage 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 the sand. After the airflow enters the box 155, the space suddenly increases and the airflow speed decreases. It will not be enough to continue to adsorb and take away the sand, 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 is convenient for separating 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 disposed 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 opened, 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 diameters 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 from entering the box 155, but also does not affect the sand falling from the circulation pipe 18 to 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 body, wherein a cavity for containing sand is provided inside;

[0103] A sand inlet, arranged at the upper part of the shell;

[0104] 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.

[0105] Since the two solenoid valves are cyclically opened and closed, 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 in the shell and then gradually fall from the sand outlet.

[0106] like Figure 5 In some embodiments, a sand suction nozzle is provided at the end of the recovery pipe 14, 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 direction of the opening of the sand suction nozzle is at an angle of 45° to the direction of the rail 13; facing the direction where the sand is splashed to improve the suction effect;

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

[0110] The midpoint of the opening of the sand suction nozzle is close to the contact point between the wheel 12 and the rail 13. The distance is close, and it is 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 pipeline 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 on the train by 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] A sand discharge device is provided on the sand discharge pipe 111 to discharge 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 air blowing device 19 is arranged on the sand storage box 11 or the train through a bracket; the air 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 to increase 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 discharging roller 114 is rotatably arranged on the sand discharging pipe 111; the roller is a cylindrical structure.

[0122] The driving component 113 is fixedly arranged on the sand discharge pipe 111 or the train, and drives the discharging 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 trough bodies.

[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 the sand storage chambers 116 one by one, connecting the corresponding sand storage chambers 116 and the external space, and the cross-sectional area of ​​the slow-release holes 117 is smaller than the cross-sectional area of ​​the sand storage chambers 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 can be 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, and the two are closely attached together 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 in 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 explicitly 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.

2. The rail vehicle sandblasting device according to claim 1, characterized in that: 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; The exhaust fan is installed on the dust removal pipe.

3. The rail vehicle sandblasting device according to claim 2, characterized in that: 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.

4. The rail vehicle sandblasting device according to claim 3, 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.

5. The rail vehicle sandblasting device according to claim 4, 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, wherein a cavity for containing sand is provided inside; 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.

6. 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 sand suction nozzle opening 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.

7. The rail vehicle sandblasting device according to claim 6, 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.

8. The rail vehicle sandblasting device according to claim 7, 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.

9. The rail vehicle sandblasting device according to claim 8, 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.

10. The rail vehicle sandblasting device according to claim 3, characterized in that: The sifter also includes: The heating device is arranged on the upper part of the substrate.

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