Gantry dust suppression spraying equipment special for railway

Abstract

The utility model relates to the field of railway coal transportation dust suppression equipment, in particular to special gantry dust suppression spraying equipment for railways, which comprises a clean water tank, a stirring tank, a pre-dissolving machine, a spraying gantry and at least one liquid storage tank. Connecting frames are fixedly arranged between the tops of the opposite supporting frames, a spraying roller is arranged at the bottom of each connecting frame, an inner pipe is arranged in each spraying roller, the spraying rollers can rotate relative to the inner pipes, a gap is formed between each inner pipe and the inner wall of the corresponding spraying roller, and a row of nozzles are arranged on the inner pipes opposite to the spraying rollers. And spraying holes are formed in the body of the spraying roller opposite to the spraying head. After the spraying portal frame sprays the dust suppressant solution for a period of time, clean water is drained to the spraying portal frame, the clean water is adopted to wash the spray heads, the dust suppressant attached to the spray heads is removed, and the problem that the spray heads of traditional spraying equipment are extremely prone to being blocked is solved.

Description

Technical Field

[0001] This utility model relates to the field of dust suppression equipment for railway coal transportation, and in particular to a special gantry dust suppression spraying device for railways. Background Technology

[0002] During the transportation of bulk coal by rail, the speed of the train and the force of the wind easily blow coal dust particles off the surface of the carriages. This not only wastes coal resources and causes economic losses for the cargo owners, but also pollutes the environment along the railway line. Especially on railway lines where passenger and freight traffic are mixed, the dust particles can pose a serious threat to the health of passengers on passenger trains. It is understood that bulk coal transportation accounts for 40% of the total railway freight volume, so controlling dust during the transportation of bulk coal by rail is of paramount importance.

[0003] Currently, dust suppression methods used in railway coal transportation include water spraying, covering (using tarpaulins or dust nets), enclosed transportation, and spraying dust suppressants.

[0004] Spraying dust suppressants is a common method for preventing coal dust. It eliminates the need for additional tarpaulin facilities, saving material costs and offering advantages such as convenience and efficiency. Furthermore, it does not interfere with current automated coal loading and unloading systems. This method is widely used in railway coal transportation. During coal transportation and storage, the dust suppressant works on the principle of surface adhesion and fixation. When the dust suppressant is sprayed onto the coal surface, fine dust particles are adhered together, forming a hard and highly adhesive solidified layer. This solidified layer itself is difficult to disperse due to its adhesive properties, and the coal underneath is also protected by the solidified layer, thus achieving a dust suppression effect. Since coal is typically transported in open wagons during railway transportation, dust suppression using dust suppressants is a highly promising dust suppression method.

[0005] Due to factors such as water quality, dust suppressant usage, and the environment in which it is used, the nozzles of most dust suppressant spraying equipment are prone to clogging, which seriously affects the dust suppression effect of railway coal transportation. Utility Model Content

[0006] This invention addresses the clogging problem in current dust suppressant spraying equipment used in railway coal transportation by providing a railway-specific gantry dust suppressant spraying device.

[0007] This utility model is achieved through the following technical solution: a railway-specific gantry dust suppression spraying device, comprising a clean water tank, a mixing tank, a pre-dissolving machine, a spraying gantry frame, and at least one storage tank.

[0008] The bottom of the clear water tank is connected to the inlet of the pre-dissolving machine via a first pipe with a clear water valve for dissolving the material. The outlet of the pre-dissolving machine is connected to the inlet of the mixing tank. A stirring motor is installed on the top of the mixing tank. The bottom of the mixing tank is connected to the top of all the storage tanks via a liquid lifting pump and a liquid lifting pipe installed on the outlet of the liquid lifting pump. The outlet of the storage tank is connected to a second pipe with a discharge valve. A first spray pump is installed on the second pipe. A third pipe with a clear water valve is installed between the clear water tank and the second pipe.

[0009] The spraying gantry includes at least one set of support frames. Each set of support frames includes two support frames that are positioned opposite each other on both sides of the rail. A connecting frame is fixedly installed between the tops of the opposing support frames. A spraying roller is installed at the bottom of each connecting frame. An inner tube is installed inside the spraying roller. The spraying roller can rotate relative to the inner tube. There is a gap between the inner tube and the inner wall of the spraying roller. A row of nozzles is installed on the inner tube opposite the spraying roller. Spray holes are installed on the spraying roller body opposite the nozzles. Both ends of the spraying roller are closed structures. A second pipe can pass through the spraying roller and connect to the inner tube. A return pipe is installed on the spraying roller to connect the space between the inner tube and the inner wall of the spraying roller. The return pipe is connected to a return box, and the return box is connected to a mixing tank through a pipe.

[0010] As a further improvement to the technical solution of this utility model, there are two liquid storage tanks, and a connecting pipe is provided between the upper parts of the two liquid storage tanks. The outlet of the liquid lifting pipe is connected to the connecting pipe. An upper connecting pipe and a lower connecting pipe are respectively provided between the top and bottom of the two liquid storage tanks. A circulation pipe is provided between the upper connecting pipe and the lower connecting pipe. A circulation pump is provided on the circulation pipe. The second pipe is connected to the lower connecting pipe.

[0011] As a further improvement to the technical solution of this utility model, the spraying roller is suspended below the horizontal rod, and vertical guide rods are respectively provided on the sides of the support frame opposite to the horizontal rod. The two ends of the horizontal rod are respectively guided and slidably engaged with the corresponding vertical guide rods. A power wheel is provided in the middle of the connecting frame, and a guide wheel is respectively provided on the connecting frame on both sides of the power wheel. Connecting rings are respectively provided on the upper part of the horizontal rod opposite to the power wheel and the two guide wheels. A steel wire rope is provided on the power wheel. One end of the steel wire rope is connected to the power wheel and passes through one of the guide wheels, all the connecting rings and the other guide wheel in sequence. The other end of the steel wire rope is connected to the power wheel.

[0012] As a further improvement to the technical solution of this utility model, hand valves are respectively provided on the lower connecting pipes located on both sides of the circulation pipe.

[0013] As a further improvement to the technical solution of this utility model, the connection between the second pipe and the lower connecting pipe is located between the two hand valves.

[0014] As a further improvement to the technical solution of this utility model, the bottom of the clean water tank is provided with a water inlet pipe connected to a water source, and a water inlet valve is provided on the water inlet pipe.

[0015] As a further improvement to the technical solution of this utility model, a fourth pipe is provided in parallel on the second pipe located at the connection of the third pipe and the outlet of the first spray pump, and a second spray pump is provided on the fourth pipe.

[0016] As a further improvement to the technical solution of this utility model, a second control valve is provided on the fourth pipe located at the inlet of the second spray pump; a first control valve is provided on the second pipe located at the connection of the fourth pipe and the inlet of the first spray pump.

[0017] As a further improvement to the technical solution of this utility model, a flow meter is installed on the second pipe.

[0018] Compared with existing technologies, the railway-specific gantry dust suppression spraying equipment of this utility model has the following advantages: A pre-dissolving machine thoroughly mixes clean water and dust suppressant, and a stirring motor further agitates the pre-dissolved dust suppressant solution until it is uniformly mixed. The solution is then sprayed onto railway coal through a spraying gantry. After spraying the dust suppressant solution for a period of time, clean water is diverted to the spraying gantry to rinse the nozzles, removing any dust suppressant adhering to them. This solves the problem of nozzle clogging in traditional spraying equipment and extends the service life of the spraying equipment components. Furthermore, this utility model can continuously spray the dust suppressant solution while simultaneously recycling the solution between adjacent carriages, avoiding resource waste. The recycled dust suppressant solution can also be reused in the preparation of new materials. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural diagram of a railway-specific gantry dust suppression spraying equipment (a set of support frames).

[0022] Figure 2 This is a front view of a railway-specific gantry dust suppression spraying equipment.

[0023] Figure 3 This is a partial schematic diagram of the spraying gantry (two sets of support frames).

[0024] Figure 4 for Figure 2 Top view.

[0025] Figure 5 for Figure 2 Side view.

[0026] In the diagram: 1-Storage tank, 2-Clear water tank, 3-Mixing tank, 4-Pre-dissolving machine, 5-Spraying gantry, 6-Return box, 7-Railway, 101-First pipe, 102-Second pipe, 103-First spraying pump, 104-Return pipe, 105-Third pipe, 106-Connecting pipe, 107-Upper connecting pipe, 108-Lower connecting pipe, 109-Circulation pipe, 110-Circulation pump, 111-Hand valve, 112-Inlet pipe, 113-Inlet valve, 114-Fourth pipe, 1 15-Second spray pump, 116-Flow meter, 201-Melt and clean water valve, 202-Discharge valve, 203-Clean water valve, 204-Second control valve, 205-First control valve, 31-Stirring motor, 32-Liquid lifting pump, 33-Liquid lifting pipe, 51-Support frame assembly, 511-Support frame, 512-Connecting frame, 52-Spraying roller, 521-Spray hole, 53-Horizontal suspension rod, 54-Vertical guide rod, 55-Power wheel, 56-Guide wheel, 57-Connecting ring, 58-Platform. Detailed Implementation

[0027] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0028] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0030] The specific embodiments of this utility model will be described in detail below.

[0031] like Figure 1-2 As shown in Figures 4-5, this utility model provides a specific embodiment of a railway-specific gantry dust suppression spraying device, including a clean water tank 2, a mixing tank 3, a pre-dissolving machine 4, a spraying gantry 5, and at least one storage tank 1.

[0032] The bottom of the clear water tank 2 is connected to the inlet of the pre-dissolving machine 4 through a first pipe 101 with a clear water valve 201. The outlet of the pre-dissolving machine 4 is connected to the inlet of the mixing tank 3. The top of the mixing tank 3 is equipped with a stirring motor 31. The bottom of the mixing tank 3 is connected to the top of all the storage tanks 1 through a liquid lifting pump 32 and a liquid lifting pipe 33 on the outlet of the liquid lifting pump 32. The outlet of the storage tank 1 is connected to a second pipe 102 with a discharge valve 202. A first spray pump 103 is provided on the second pipe 102. A third pipe 105 with a clear water valve 203 is provided between the clear water tank 2 and the second pipe 102.

[0033] The spraying gantry 5 includes at least one set of support frame groups 51. Each set of support frame groups 51 includes two support frames 511 that are set opposite to each other on both sides of the rail 7. A connecting frame 512 is fixedly installed between the tops of the opposite support frames 511. A spraying roller 52 is installed at the bottom of each connecting frame 512. An inner tube is installed inside the spraying roller 52. The spraying roller 52 can rotate relative to the inner tube. There is a gap between the inner tube and the inner wall of the spraying roller 52. A row of nozzles is installed on the inner tube opposite to the spraying roller 52. A spray hole 521 is installed on the cylinder of the spraying roller 52 opposite to the nozzles. Both ends of the spraying roller 52 are closed structures. The second pipe 102 can pass through the spraying roller 52 and connect to the inner tube. A return pipe 104 is installed on the spraying roller 52 to connect the space between the inner tube and the inner wall of the spraying roller 52. The return pipe 104 is connected to the return box 6, and the return box 6 is connected to the mixing tank 3 through a pipe.

[0034] During the mixing process, clean water in the clean water tank 2 enters the pre-dissolving machine 4 through the first pipe 101 equipped with a dissolving water valve 201. The dust suppressant in the powder silo is transferred to the pre-dissolving machine 4. The stirring motor 31 on the stirring tank 3 is started. After the dust suppressant and clean water are premixed and reach the required ratio, the dissolving water valve 201 is closed. The mixed liquid in the pre-dissolving machine 4 is then transported to the stirring tank 3, and the pre-dissolving machine 4 is turned off. The stirring motor 31 in the stirring tank 3 controls the rotation of the stirring shaft, ensuring that the dust suppressant and clean water are thoroughly and evenly mixed. In this embodiment, the stirring shaft has multiple stirring blades. After the dust suppressant solution is evenly mixed, the stirring motor 31 is turned off, and the dust suppressant solution is transported to the storage tank 1 through the liquid extraction pump 32 and the liquid extraction pipe 33.

[0035] During railway coal transportation, when the infrared sensor detects the train speed, the back-end controller calculates the required spraying time of the dust suppressant solution mixture for each coal car and the downtime between adjacent cars. The dust suppressant solution in the storage tank 1 is pumped to the spraying gantry 5 by the first spraying pump 103 through the discharge valve 202 and the second pipeline 102. The dust suppressant solution is then transferred to the inner tube of the spraying roller 52 through the second pipeline 102. The dust suppressant solution sprayed from the nozzles in the inner tube is sprayed onto the coal inside the car through the spray holes 521. When the spraying of one car is completed... After the coal is passed, the spraying drum 52 rotates so that the spray holes 521 face upwards. The liquid sprayed from the nozzles of the inner tube is blocked by the spraying drum 52 and flows back to the return box 6 through the gap between the spraying drum 52 and the inner tube and the return pipe 104, realizing the liquid stop between adjacent cars. When the next car passes under the spraying drum 52, the spraying drum 52 rotates so that the spray holes 521 face the nozzles of the inner tube. The dust suppressant solution is sprayed out through the inner tube and the nozzles. The sprayed dust suppressant solution is sprayed onto the coal inside the car through the spray holes 55.

[0036] In this embodiment, the rotation of the spraying roller 54 can be achieved by a motor or gear pair, which is something that those skilled in the art can do.

[0037] In this embodiment, the dust suppressant solution recovered in the reflux tank 6 can be transferred to the mixing tank 3 to avoid resource waste, and the refluxed dust suppressant solution can be reused in the batching process.

[0038] During nozzle cleaning, the spray roller 52 rotates so that the nozzles 521 face upwards. The discharge valve 202 is closed, and the clean water valve 203 on the third pipe 105 is opened. Clean water in the clean water tank 2 is transported by the first spray pump 103 through the third pipe 105 and the second pipe 102 to the inner tube of the spray roller 52. The clean water washes away the dust suppressant impurities adhering to the nozzle through the nozzle. The liquid containing the dust suppressant sprayed from the nozzle flows back to the return box 6 through the return pipe 104 through the gap between the spray roller 52 and the inner tube. After cleaning the nozzle, the clean water valve 203 is closed.

[0039] like Figure 1As shown, there are two storage tanks 1, and a connecting pipe 106 is provided between the upper parts of the two storage tanks 1. The outlet of the liquid lifting pipe 33 is connected to the connecting pipe 106. An upper connecting pipe 107 and a lower connecting pipe 108 are respectively provided between the top and bottom of the two storage tanks 1. A circulation pipe 109 is provided between the upper connecting pipe 107 and the lower connecting pipe 108. A circulation pump 110 is provided on the circulation pipe 109. The second pipe 102 is connected to the lower connecting pipe 108. In order to prevent the dust suppressant from settling in the storage tanks 1, during the storage process, the liquid at the bottom of the two storage tanks 1 is transferred to the upper connecting pipe 107 through the lower connecting pipe 108 and the circulation pipe 109 by the circulation pump 110. The liquid in the upper connecting pipe 107 is diverted to the two storage tanks 1. This cycle is repeated to effectively prevent the dust suppressant from settling in the storage tanks 1. In this embodiment, the use of the circulation pump 110 on the storage tank 1 does not affect the discharge of the storage tank 1. In order to ensure the uniformity of the discharged liquid, the liquid in the storage tank 1 can be circulated during the batching and cleaning of the nozzle.

[0040] like Figure 3 As shown, this utility model provides a specific installation method for the spraying roller 52, namely, the spraying roller 52 is suspended below the horizontal hanger 53, and vertical guide rods 54 are respectively provided on the sides of the support frame 511 opposite to the horizontal hanger 53. The two ends of the horizontal hanger 53 are respectively guided and slidably engaged with the corresponding vertical guide rods 54. A power wheel 55 is provided in the middle of the connecting frame 512, and a guide wheel 56 is respectively provided on the connecting frame 512 on both sides of the power wheel 55. A connecting ring 57 is respectively provided on the upper part of the horizontal hanger 53 opposite to the power wheel 55 and the two guide wheels 56. A steel wire rope is provided on the power wheel 55. One end of the steel wire rope is connected to the power wheel 55 and passes through one of the guide wheels 56, all the connecting rings 57 and the other guide wheel 56 in sequence. The other end of the steel wire rope is connected to the power wheel 55.

[0041] In this embodiment, a motor with a speed reducer is coaxially mounted on the drive wheel 55. When it is necessary to adjust the operating height of the spray drum 52 or to perform maintenance on the spray drum 52, the motor with the speed reducer is started. The motor drives the drive wheel 55 to rotate. While the drive wheel 55 rotates, the guide wheels 56 on both sides of the drive wheel 55 guide the moving steel wire rope. The two ends of the steel wire rope are wrapped (or released) around the drive wheel 55. The steel wire rope between the two guide wheels 56 and the corresponding connecting rings 57 shortens (or lengthens), so that the horizontal rod 53 gradually approaches (or moves away from) the connecting frame 512. The rise (or fall) of the horizontal rod 53 enables the spray drum 52 to rise and fall. At the same time, in order to prevent the spray drum 52 from swaying back and forth or left and right during normal use or lifting, due to the limiting effect of the vertical guide rod 54, the two ends of the horizontal rod 53 can only slide up and down along the vertical guide rod 54, which effectively solves the problem of equipment shaking and improves stability.

[0042] like Figure 3 As shown, to facilitate the winding and unwinding of the wire rope on the drive wheel 55, the drive wheel 55 in this embodiment has a double-grooved structure. One end of the wire rope is wound in one groove of the drive wheel 55, and the other end of the wire rope is wound in the other groove of the drive wheel 55. To facilitate the guidance of the wire rope by the guide wheel 56, the guide wheel in this embodiment has a single-grooved structure.

[0043] Specifically, such as Figure 3 As shown, in this embodiment, the horizontal rod 53 has guide holes at both ends, and the vertical guide rod 54 is fixedly installed on the support frame 511 at both ends. The vertical guide rod 54 is movably inserted and engaged with the corresponding guide hole. The two ends of the horizontal rod 53 are limited and slidably engaged with the vertical guide rod 54 through the guide hole, so that the horizontal rod 53 can move up and down in the vertical direction.

[0044] In this embodiment, to avoid the impact of the lifting and lowering of the spraying roller 52 on the second pipe 102, the second pipe 102 is made of a deformable material, such as a metal hose. Furthermore, in this embodiment, the second pipe 102 and the spraying roller 52 are dynamically sealed together.

[0045] Meanwhile, to facilitate maintenance of the spray roller 52, a platform 58 is provided above the support frame assembly 51 in this embodiment. The platform 58 is located between adjacent support frame assemblies 51 (e.g., Figure 3 (As shown), or located at the front and rear ends of a set of support frame groups 51. When maintenance is required on the spray drum 52, the wire rope is wound around the power wheel 55 by adjusting the power wheel 55, and maintenance personnel can stand on the platform 58 to perform maintenance on the spray drum 52.

[0046] like Figure 1 As shown, the spraying gantry 5 is a set of support frame groups 51. Figure 3 As shown, the spraying gantry 5 consists of two sets of support frames 51. Each set of support frames 51 is equipped with two spraying rollers 52, which can significantly increase the spraying volume of the dust suppressant solution.

[0047] Preferably, a hand valve 111 is provided on each of the lower connecting pipes 108 located on both sides of the circulation pipe 109. Depending on the situation, the hand valve 111 on one side of one of the liquid storage tanks 1 can be closed, and the hand valve 111 on the other side of the liquid storage tank 1 can be opened to circulate the liquid in the other liquid storage tank 1.

[0048] like Figure 1 As shown, the connection between the second pipe 102 and the lower connecting pipe 108 is located between the two hand valves 111. In practical applications, the operator can close the hand valve 111 on one side of one of the storage tanks 1 and open the hand valve 111 on the other side of the storage tank 1, and open the discharge valve 202, so that the liquid in the other storage tank 1 can suppress dust in the railway coal mine through the first spray pump 103.

[0049] As shown in the figure, the bottom of the clean water tank 2 is provided with a water inlet pipe 112 connected to the water source, and a water inlet valve 113 is provided on the water inlet pipe 112.

[0050] To prevent the spraying gantry 5 from stopping during maintenance of the first spraying pump 103, a fourth pipe 114 is preferably connected in parallel to the second pipe 102 located at the connection of the third pipe 105 and the outlet of the first spraying pump 103. A second spraying pump 115 is installed on the fourth pipe 114. In practical application, when maintenance of the first spraying pump 103 is required, the dust suppressant solution can be transported to the spraying gantry 5 through the second spraying pump 115 on the fourth pipe 114. In this embodiment, to facilitate control of the liquid flow direction, a second control valve 204 is installed on the fourth pipe 114 located at the inlet of the second spraying pump 115; a first control valve 205 is installed on the second pipe 102 located at the connection of the fourth pipe 114 and the inlet of the first spraying pump 103. When the first spray pump 103 is under maintenance, the second control valve 204 and the second spray pump 115 on the fourth pipeline 114 are opened, and the first control valve 205 and the first spray pump 103 on the second pipeline 102 are closed. The dust suppressant solution can be transported to the second pipeline 102 and the spray drum 52 through the second spray pump 115 on the fourth pipeline 114.

[0051] In this embodiment, a flow meter 116 is installed on the second pipe 102. The flow meter 116 can detect the flow rate of the dust suppressant solution, and the controller can dispense the dust suppressant in real time according to the solution flow rate, so as to avoid the dust suppression in railway coal mines being affected by insufficient liquid capacity in the storage tank 1.

[0052] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and all should be covered by the protection scope of the claims.

Claims

1. A railway-specific gantry dust suppression spraying system, characterized in that, It includes a water tank (2), a mixing tank (3), a pre-dissolving machine (4), a spraying gantry (5), and at least one storage tank (1). The bottom of the clear water tank (2) is connected to the inlet of the pre-dissolving machine (4) through a first pipe (101) with a clear water valve (201). The outlet of the pre-dissolving machine (4) is connected to the inlet of the mixing tank (3). The top of the mixing tank (3) is equipped with a stirring motor (31). The bottom of the mixing tank (3) is connected to the top of all the storage tanks (1) through a liquid lifting pump (32) and a liquid lifting pipe (33) on the outlet of the liquid lifting pump (32). The outlet of the storage tank (1) is connected to a second pipe (102) with a discharge valve (202). A first spray pump (103) is provided on the second pipe (102). A third pipe (105) with a clear water valve (203) is provided between the clear water tank (2) and the second pipe (102). The spraying gantry (5) includes at least one set of support frame groups (51). Each set of support frame groups (51) includes two support frames (511) that are oppositely set on both sides of the rail (7). A connecting frame (512) is fixedly set between the tops of the opposite support frames (511). A spraying roller (52) is set at the bottom of each connecting frame (512). An inner tube is set inside the spraying roller (52). The spraying roller (52) can rotate relative to the inner tube. There is a gap between the inner tube and the inner wall of the spraying roller (52). A row of nozzles is provided on the inner tube opposite to the drum (52), and a spray hole (521) is provided on the body of the spray drum (52) opposite to the nozzle. Both ends of the spray drum (52) are closed structures, and the second pipe (102) can pass through the spray drum (52) and connect with the inner tube. A return pipe (104) is provided on the spray drum (52) to connect the space between the inner tube and the inner wall of the spray drum (52). The return pipe (104) is connected to the return box (6), and the return box (6) is connected to the mixing tank (3) through a pipe.

2. The railway-specific gantry dust suppression spraying equipment according to claim 1, characterized in that, There are two storage tanks (1), and a connecting pipe (106) is provided between the upper parts of the two storage tanks (1). The outlet of the liquid extraction pipe (33) is connected to the connecting pipe (106). An upper connecting pipe (107) and a lower connecting pipe (108) are respectively provided between the top and bottom of the two storage tanks (1). A circulation pipe (109) is provided between the upper connecting pipe (107) and the lower connecting pipe (108). A circulation pump (110) is provided on the circulation pipe (109). The second pipe (102) is connected to the lower connecting pipe (108).

3. The railway-specific gantry dust suppression spraying equipment according to claim 1, characterized in that, The spraying roller (52) is suspended below the horizontal rod (53). Vertical guide rods (54) are respectively provided on the sides of the support frame (511) opposite to the horizontal rod (53). The two ends of the horizontal rod (53) are respectively guided and slidably engaged with the corresponding vertical guide rods (54). A power wheel (55) is provided in the middle of the connecting frame (512). A guide wheel (56) is respectively provided on the connecting frame (512) on both sides of the power wheel (55). A connecting ring (57) is respectively provided on the upper part of the horizontal rod (53) opposite to the power wheel (55) and the two guide wheels (56). A wire rope is provided on the power wheel (55). One end of the wire rope is connected to the power wheel (55) and passes through one of the guide wheels (56), all the connecting rings (57) and the other guide wheel (56) in sequence. The other end of the wire rope is connected to the power wheel (55).

4. The railway-specific gantry dust suppression spraying equipment according to claim 1, characterized in that, Hand valves (111) are respectively installed on the lower connecting pipes (108) on both sides of the circulation pipe (109).

5. The railway-specific gantry dust suppression spraying equipment according to claim 1, characterized in that, The connection between the second pipe (102) and the lower connecting pipe (108) is located between the two hand valves (111).

6. The railway-specific gantry dust suppression spraying equipment according to claim 1, characterized in that, The bottom of the clean water tank (2) is provided with an inlet pipe (112) connected to the water source, and an inlet valve (113) is provided on the inlet pipe (112).

7. The railway-specific gantry dust suppression spraying equipment according to claim 1, characterized in that, A fourth pipe (114) is connected in parallel to the second pipe (102) located at the connection of the third pipe (105) and the outlet of the first spray pump (103), and a second spray pump (115) is installed on the fourth pipe (114).

8. The railway-specific gantry dust suppression spraying equipment according to claim 1, characterized in that, A second control valve (204) is installed on the fourth pipe (114) located at the inlet of the second spray pump (115); a first control valve (205) is installed on the second pipe (102) located at the connection of the fourth pipe (114) and the inlet of the first spray pump (103).

9. The railway-specific gantry dust suppression spraying equipment according to claim 1, characterized in that, A flow meter (116) is installed on the second pipe (102).

Images