Sand valve for rail transit

Abstract

The present application belongs to the technical field of sanding system, especially to a gravity type sanding needle air inlet seat sanding valve for rail transit; the present application comprises a valve body, the valve body is fixedly connected with an air inlet seat, the air inlet seat is fixedly connected with a flow regulating air valve; the valve body is provided with a sand inlet and an obliquely arranged sand outlet, the sand outlet is fixedly connected with an obliquely arranged sand outlet pipe, the valve body is internally provided with a sand storage cavity, a sand blowing cavity and a sand outlet cavity, wherein the upper and lower ends of the sand storage cavity are connected with the sand inlet and the sand blowing cavity respectively; a baffle is arranged between the sand blowing cavity and the sand outlet cavity, the top of the sand blowing cavity and the sand outlet cavity are in communication with each other, and the lower end of the sand outlet cavity is connected with the sand outlet; the valve body is rotatably connected with a sand cleaning block; the sand cleaning block is rotatably connected in the valve body, when the sand cleaning block rotates, the sand particles in the sand storage cavity are driven to flow into the sand blowing cavity, thereby quickly dredging the space between the sand storage cavity and the sand blowing cavity and eliminating the problem of blockage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sanding systems, in particular to a gravity type sanding needle air inlet seat sanding valve for rail transit. BACKGROUND

[0002] At present, when rail transit vehicles such as locomotives start and climb, quartz sand is sprayed between the steel rails and the wheels through the sanding valve of the sanding system to increase the friction between the wheels and the rails and prevent the wheels from slipping and scratching the wheels and rails.

[0003] The existing patent CN211995554U discloses a gravity type sanding nozzle sanding valve for rail transit, which comprises an air inlet seat, a first sanding nozzle and a second sanding nozzle. A blow cavity is arranged in the valve body and communicates with the sand storage cavity and the sand outlet. The blow cavity penetrates the valve body to form a blow port, and the air inlet seat is mounted on the blow port. The first sanding nozzle and the second sanding nozzle are rotatably embedded in the air inlet seat. The first sanding nozzle is inclined towards the blow cavity at one end and the blocking part, and the second sanding nozzle is inclined towards the blow cavity at the other end and the sand outlet. The first sanding nozzle air inlet end is connected with the second sanding nozzle air outlet end, and the second sanding nozzle air inlet end is communicated with the air inlet channel of the air inlet seat. The utility model can improve the sanding efficiency, adjust the sanding amount, effectively reduce the use and maintenance cost of the sanding valve, and improve the driving safety of rail transit.

[0004] However, the gravity type sanding device in this patent technology has the following shortcomings:

[0005] 1. The first sanding nozzle and the second sanding nozzle are prone to sand accumulation and blockage, causing the gravity type sanding device to fail.

[0006] 2. The sand storage cavity and the blow cavity are provided with a blocking part, forming a U-shaped narrow channel between them. This channel is prone to sand accumulation and blockage and is inconvenient to clean. SUMMARY

[0007] In view of the shortcomings of the prior art, the present application provides a gravity type sanding needle air inlet seat sanding valve for rail transit, which is provided with a cleaning block rotatably connected in the valve body, which can clean the sand storage cavity and the sanding cavity, aiming to solve the problems in the background art.

[0008] In order to achieve the above technical purpose, the specific technical scheme of the present application is as follows: the present application provides a gravity type sand cleaning needle air inlet seat sanding valve for rail transit, which comprises a valve body, an air inlet seat fixedly connected to the valve body, and a flow regulating air valve fixedly connected to the air inlet seat; the valve body is provided with a sand inlet and an inclined sand outlet, the sand outlet is fixedly connected to the valve body in an inclined manner, the inside of the valve body is provided with a sand storage cavity, a sand blowing cavity and a sand outlet cavity, the upper and lower ends of the sand storage cavity are connected to the sand inlet and the sand blowing cavity respectively; a baffle is arranged between the sand blowing cavity and the sand outlet cavity, the top of the sand blowing cavity and the sand outlet cavity are connected to each other, and the lower end of the sand outlet cavity is connected to the sand outlet; a sand cleaning block is rotatably connected to the inside of the valve body, which is used for cleaning the sand storage cavity and the sand blowing cavity, and the sand cleaning block is arranged between the sand storage cavity and the sand blowing cavity.

[0009] Further, the sand cleaning block comprises a sand cleaning part and a blocking part arranged at the lower end of the sand cleaning part, the blocking part is used for separating the sand storage cavity and the sand blowing cavity, and the top of the valve body is provided with an arc groove part which is rotatably connected to the sand cleaning part.

[0010] Further, a rotating handle is connected to the sand cleaning block, and the rotating handle is arranged outside the valve body.

[0011] Further, the air inlet seat is provided with an air inlet, and the air inlet seat is provided with a first sand blowing nozzle and a second sand blowing nozzle; the first sand blowing nozzle blows air towards the sand blowing cavity, and the second sand blowing nozzle blows air towards the sand outlet cavity; the cross sections of the first sand blowing nozzle and the second sand blowing nozzle are both in a gradually expanding structure.

[0012] Further, a filter screen is connected to the first sand blowing nozzle, a containing groove is arranged in the air inlet seat, a sand cleaning needle assembly is arranged in the containing groove, and the sand cleaning needle assembly is used for cleaning the second sand blowing nozzle.

[0013] Further, the sand cleaning needle assembly comprises a sand cleaning needle, a reset spring, a sand cleaning needle mounting seat, a first sealing ring and a second sealing ring, the reset spring is used for resetting the sand cleaning needle, and the end of the sand cleaning needle close to the second sand blowing nozzle is provided in a pointed structure.

[0014] Further, the flow regulating air valve is provided with an air inlet nozzle and an air outlet head, an air flow channel is arranged between the air inlet nozzle and the air outlet head, the air outlet head is sealingly connected to the air inlet, a regulating bolt is connected to the flow regulating air valve, one end of the regulating bolt extends into the air flow channel, and a first locking nut is connected to the regulating bolt.

[0015] Further, the bottom of the valve body is provided with a sand stirring opening matched with the sand storage cavity, a screw plug is threadedly connected to the outside of the sand stirring opening, a sand stirrer is arranged in the screw plug, one end of the sand stirrer is arranged in the sand stirring opening, and a second sealing gasket is arranged between the screw plug and the sand stirring opening.

[0016] Further, the sand outlet pipe is fixedly connected with the sand outlet through a second nut, and a first sealing gasket is connected between the sand outlet pipe and the sand outlet, and a third sealing gasket is arranged at the sand inlet, for sealing between the sand valve and the sand box.

[0017] Further, the air inlet seat is fixedly connected with the valve body through a hexagonal bolt, and a spring washer and a flat washer are connected on the hexagonal bolt.

[0018] The beneficial effects in the application are:

[0019] 1. The sand cleaning block is rotatably connected in the valve body, the sand cleaning block is provided with a cleaning cloth and a blocking part, when the sand cleaning block rotates, the passage between the sand storage cavity and the sand blowing cavity is widened, and the cleaning part extrudes the sand particles in the sand storage cavity, so that the sand particles in the sand storage cavity flow into the sand blowing cavity, thereby quickly dredging the passage between the sand storage cavity and the sand blowing cavity, and eliminating the blockage problem.

[0020] 2. The compressed air directly blows the sand particles in the sand distributor through the first sand blowing nozzle, the quartz sand is stirred and lifted, and then the quartz sand is blown out through the second sand blowing nozzle, even if the quartz sand in the sand distributor has slight clumping, the compressed air can also stir the quartz sand, and the phenomenon that the sand cannot be sprayed out due to clumping of the sand particles does not occur, and the filter screen arranged on the first sand blowing nozzle can effectively prevent the nozzle from being blocked.

[0021] 3. The air flow of the sand distributor can be adjusted through the flow regulating air valve according to the driving condition, the sanding amount is adjustable, waste is eliminated, the cost is reduced, and the sanding device is suitable for more kinds of sand particles, and can effectively reduce the operation cost.

[0022] 4. The second sand blowing nozzle adopts a sand cleaning needle structure, the cross section of the second sand blowing nozzle is a gradually expanding structure, the sand stirring and blowing compressed air flow rate can be effectively reduced, the hitting force of the quartz sand on the valve body during the sanding execution process of the sanding device can be reduced, the service life of the sanding device can be effectively improved, when the second sand blowing nozzle is blocked by the quartz sand, the sanding device can be used without disassembly, the blockage problem can be eliminated by pressing the sand cleaning needle, and the use and maintenance cost of the sanding device is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a sectional view of the gravity type sand cleaning needle air inlet seat sanding valve for rail transit.

[0024] Figure 2 It is a top view of the gravity type sand cleaning needle air inlet seat sanding valve for rail transit.

[0025] Figure 3 It is a structure diagram of the sand cleaning block.

[0026] Figure 4The figure is a schematic diagram of the sand cleaning of the gravity type sand cleaning needle air inlet seat sanding valve for rail transit of the present application.

[0027] Figure 5 The figure is a sectional view of the air inlet seat of the present application.

[0028] Figure 6 The figure is a sectional view of the flow regulating air valve of the present application.

[0029] Corresponding names of the reference numerals in the figure are as follows: 1, valve body; 2, air inlet seat; 3, flow regulating air valve; 31, air inlet nozzle; 32, air outlet head; 33, regulating bolt; 34, first locking nut; 35, air flow channel; 4, sand cleaning block; 41, sand cleaning part; 42, blocking part; 5, sand inlet; 6, sand storage cavity; 7, sand blowing cavity; 8, sand outlet cavity; 9, sand outlet; 10, sand outlet pipe; 11, first sealing gasket; 12, sand agitator; 13, screw plug; 14, second sealing gasket; 15, third sealing gasket; 16, baffle; 17, rotating handle; 18, hexagonal bolt; 19, sand agitating opening; 20, flat washer; 21, first sand blowing nozzle; 22, filter screen; 23, second sand blowing nozzle; 24, sand cleaning needle assembly; 241, sand cleaning needle; 242, sand cleaning needle mounting seat; 243, return spring; 244, first sealing ring; 245, second sealing ring; 25, containing groove; 26, air inlet; 27, spring washer; 28, second nut; 29, arc groove part. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application.

[0031] Embodiment: The embodiment discloses a gravity type sand cleaning needle air inlet seat sanding valve for rail transit, like Figures 1-6As shown, including the valve body 1, the valve body 1 is fixedly connected with the sand box, the valve body 1 is provided with a nameplate, the valve body 1 is fixedly connected with the air inlet seat 2, the air inlet seat 2 is connected with the external air pipe, the air inlet seat 2 is fixedly connected with the flow regulating air valve 3, the flow regulating air valve 3 is used for adjusting the air inlet size of the air inlet seat 2; the valve body 1 is provided with the sand inlet 5 and the inclined sand outlet 9, and the third sealing gasket 15 is installed at the sand inlet 5, which is used for sealing between the sand valve and the sand box, the sand particles in the sand box enter the valve body 1 through the sand inlet 5, the sand outlet pipe 10 is fixedly connected at the sand outlet 9, and the sand outlet pipe 10 is used for guiding the sand particles to come out; the valve body 1 is provided with the sand storage cavity 6, the sand blowing cavity 7 and the sand outlet cavity 8, wherein the lower end of the sand storage cavity 6 is inclined to the sand blowing cavity 7, and the upper and lower ends of the sand storage cavity 6 are connected with the sand inlet 5 and the sand blowing cavity 7 respectively; the sand blowing cavity 7 and the sand outlet cavity 8 are separated by the baffle 16, the top of the sand blowing cavity 7 and the sand outlet cavity 8 are communicated with each other, and the lower end of the sand outlet cavity 8 is connected with the sand outlet 9; the sand particles flow out from the sand outlet pipe 10 finally after passing through the sand storage cavity 6, the sand blowing cavity 7, the sand outlet cavity 8 and the sand outlet 9 in sequence from the sand inlet 5; further, the sand cleaning block 4 is rotatably connected in the valve body 1, which is used for cleaning the sand storage cavity 6 and the sand blowing cavity 7, the sand cleaning block 4 is sealingly connected with the rotating part of the valve body 1, the sand cleaning block 4 is arranged on the side of the sand storage cavity 6 close to the sand blowing cavity 7, and the sand cleaning block 4 is arranged between the sand storage cavity 6 and the sand blowing cavity 7, so that the sand storage cavity 6 and the sand blowing cavity 7 form a U-shaped detour channel through the sand cleaning block 4, thereby avoiding a large amount of sand particles directly flowing into the sand blowing cavity 7.

[0032] Preferably, the valve body 1 is provided with the sand stirring port 19 matched with the sand storage cavity 6, the sand stirring port 19 is externally threadedly connected with the screw plug 13, the screw plug 13 is internally provided with the sand stirrer 12, one end of the sand stirrer 12 is arranged in the sand stirring port 19, and the second sealing gasket 14 is connected between the screw plug 13 and the sand stirring port 19; the sand stirrer 12 rotates synchronously with the screw plug 13, and when the quartz sand is seriously agglomerated, the quartz sand can be mechanically stirred by the screw plug 13 spirally driving the sand stirrer 12.

[0033] Preferably, the sand outlet pipe 10 is fixedly connected with the sand outlet 9 through the second nut 28, and the first sealing gasket 11 is connected between the sand outlet pipe 10 and the sand outlet 9.

[0034] The sand-cleaning block 4 includes a sand-cleaning section 41 and a baffle 42 located at the lower end of the sand-cleaning section 41. The sand-cleaning section 41 has an arc-shaped block structure. The baffle 42 is used to separate the sand storage chamber 6 and the sand blowing chamber 7. The top of the valve body 1 is provided with an arc groove 29 that rotates with the sand-cleaning section 41. The surface of the sand-cleaning section 41 is always in close contact with the inner wall of the arc groove 29. A rotating handle 17 is connected to the sand-cleaning block 4. The rotating handle 17 is located outside the valve body 1. By rotating the handle 17, the sand-cleaning block 4 can be rotated. There is a large friction between the sand-cleaning block 4 and the valve body 1, so that the position of the sand-cleaning block 4 can remain stable and will not automatically tilt. Since the sand storage chamber 6 and the sand blowing chamber 7 form a U-shaped meandering channel, the channel at the connection between the two is narrow and easy to block, making it difficult to clean. Figure 4 As shown, in this embodiment, rotating the handle 17 drives the sand-cleaning block 4 to rotate counterclockwise, so that one end of the sand-cleaning part 41 contacts the inside of the sand storage cavity 6, and the sand-cleaning part 41 does not separate from the arc groove part 29. The sand-cleaning part 41 seals the upper part of the sand storage cavity 6 to prevent sand particles from falling into the sand storage cavity 6. During the rotation, the sand-cleaning part 41 squeezes the sand particles in the sand storage cavity 6, causing the sand particles in the sand storage cavity 6 to flow into the sand blowing cavity 7, increasing the fluidity of the sand particles. As the baffle part 42 rotates, the connecting channel between the sand storage cavity 6 and the sand blowing cavity 7 continuously increases, so that the bottom space of the sand storage cavity 6 and the sand blowing cavity 7 become one. Combined with the sand-cleaning part 41 squeezing the sand particles and causing the sand particles to flow, and with the rotation of the sand stirrer 12, the connecting channel between the sand storage cavity 6 and the sand blowing cavity 7 is quickly cleared, eliminating the blockage problem and reducing the use and maintenance cost of the sand spreader. After the blockage is cleared, the sand-cleaning block 4 is rotated in the opposite direction to reset.

[0035] like Figure 2 and 5 As shown, the air intake seat 2 is fixedly connected to the valve body 1 by a hexagonal bolt 18, and a spring washer 27 and a flat washer 20 are connected to the hexagonal bolt 18. The spring washer 27 and the flat washer 20 lock the air intake seat 2 in place. The air intake seat 2 is provided with an air inlet 26, and a first sandblasting nozzle 21 and a second sandblasting nozzle 23 are installed on the air intake seat 2. The first sandblasting nozzle 21 is located on the second sandblasting nozzle 23, and the air inlet 26 is connected to both the first sandblasting nozzle 21 and the second sandblasting nozzle 23. In the process, the first sand blowing nozzle 21 blows air towards the sand blowing chamber 7, causing the sand particles in the sand blowing chamber 7 to fly up and fly towards the sand outlet chamber 8. The second sand blowing nozzle 23 blows air towards the sand outlet chamber 8, sending the raised sand particles into the sand outlet chamber 8 and into the sand outlet pipe 10 through the sand outlet port 9. The cross-sections of the first sand blowing nozzle 21 and the second sand blowing nozzle 23 are both gradually expanding structures, which can effectively reduce the flow rate of compressed air during sand stirring and sand blowing, and reduce the impact force of quartz sand on the valve body during the sand spreading process.

[0036] The first sand blowing nozzle 21 is connected with a filter screen 22, which effectively prevents the first sand blowing nozzle 21 from being blocked; the air inlet seat 2 is provided with a containing groove 25, and a sand cleaning needle assembly 24 is installed in the containing groove 25 and used for cleaning the second sand blowing nozzle 23; the sand cleaning needle assembly 24 comprises a sand cleaning needle 241, a reset spring 243 and a sand cleaning needle mounting seat 242; the sand cleaning needle mounting seat 242 is fixedly installed in the containing groove 25, the reset spring 243 is used for resetting the sand cleaning needle 241, the reset spring 243 is compressed when the sand cleaning needle 241 moves towards the second sand blowing nozzle 23, and the end of the sand cleaning needle 241 close to the second sand blowing nozzle 23 is provided with a pointed structure, so that the second sand blowing nozzle 23 is conveniently dredged and cleaned; the first sealing ring 244 is installed between the sand cleaning needle mounting seat 242 and the sand cleaning needle 241, and the second sealing ring 245 is installed between the sand cleaning needle mounting seat 242 and the inner wall of the containing groove 25, so that the air inlet seat 2 is sealed and sand particles are prevented from being exposed.

[0037] As shown in Figure 6 The air inlet nozzle 31 and the air outlet head 32 are arranged on the flow regulating air valve 3, the air flow channel 35 is arranged between the air inlet nozzle 31 and the air outlet head 32, the air outlet head 32 is threadedly and sealingly connected with the air inlet port 26, the adjusting bolt 33 is connected with the flow regulating air valve 3, one end of the adjusting bolt 33 extends into the air flow channel 35, the first locking nut 34 is connected with the adjusting bolt 33, the air inlet amount is regulated by changing the length of the adjusting bolt 33 inserted into the air flow channel 35, the sand discharging speed is regulated, and the sand spreading vehicle with different driving speeds is facilitated.

[0038] Finally, it should be noted that in the description of the present application, the terms "vertical", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0039] The above description is only the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement and the like made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A gravity sand cleaning needle air inlet seat sanding valve for rail transit, comprising a valve body (1), characterized in that, a gas inlet seat (2) is fixedly connected to the valve body (1), and a flow regulating air valve (3) is fixedly connected to the gas inlet seat (2); an air inlet (5) and an air outlet (9) obliquely arranged are arranged on the valve body (1), the air outlet (9) is fixedly connected with an air outlet pipe (10) obliquely arranged, and a sand storage cavity (6), a sand blowing cavity (7) and a sand outlet cavity (8) are arranged in the valve body (1), wherein the upper and lower ends of the sand storage cavity (6) are connected with the air inlet (5) and the sand blowing cavity (7) respectively; a baffle (16) is arranged between the sand blowing cavity (7) and the sand outlet cavity (8), the top of the sand blowing cavity (7) and the sand outlet cavity (8) are in communication with each other, and the lower end of the sand outlet cavity (8) is connected with the air outlet (9); a sand cleaning block (4) is rotatably connected in the valve body (1) for cleaning the sand storage cavity (6) and the sand blowing cavity (7), and the sand cleaning block (4) is arranged between the sand storage cavity (6) and the sand blowing cavity (7); the sand cleaning block (4) comprises a sand cleaning part (41) and a blocking part (42) arranged at the lower end of the sand cleaning part (41), and the blocking part (42) is used for separating the sand storage cavity (6) and the sand blowing cavity (7).

2. The sand injection seat valve according to claim 1, wherein, an arc groove part (29) is arranged on the top of the valve body (1) and rotatably matched with the sand cleaning part (41).

3. The sand injection seat valve according to claim 2, wherein, a rotating handle (17) is connected to the sand cleaning block (4) and arranged outside the valve body (1).

4. The sand injection seat valve according to claim 3, characterized in that, an air inlet (26) is arranged on the gas inlet seat (2), and a first sand blowing nozzle (21) and a second sand blowing nozzle (23) are arranged on the gas inlet seat (2); wherein the first sand blowing nozzle (21) blows air to the sand blowing cavity (7), the second sand blowing nozzle (23) blows air to the sand outlet cavity (8), and the cross sections of the first sand blowing nozzle (21) and the second sand blowing nozzle (23) are both gradually expanded.

5. The sand injection seat valve according to claim 4, wherein, a filter screen (22) is connected to the first sand blowing nozzle (21), a containing groove (25) is arranged in the gas inlet seat (2), and a sand cleaning needle assembly (24) is arranged in the containing groove (25) for cleaning the second sand blowing nozzle (23).

6. The sand injection seat valve according to claim 5, wherein, the sand cleaning needle assembly (24) comprises a sand cleaning needle (241), a reset spring (243), a sand cleaning needle mounting seat (242), a first sealing ring (244) and a second sealing ring (245), the reset spring (243) is used for resetting the sand cleaning needle, and one end of the sand cleaning needle (241) close to the second sand blowing nozzle (23) is provided in a pointed structure.

7. The sand injection valve according to claim 6, wherein, an air inlet nozzle (31) and an air outlet head (32) are arranged on the flow regulating air valve (3), an air flow channel (35) is arranged between the air inlet nozzle (31) and the air outlet head (32), the air outlet head (32) is sealingly connected with the air inlet (26), an adjusting bolt (33) is connected to the flow regulating air valve (3), one end of the adjusting bolt (33) extends into the air flow channel (35), and a first locking nut (34) is connected to the adjusting bolt (33).

8. The sand injection valve according to claim 7, wherein, The bottom of the valve body (1) is provided with a sand stirring opening (19) matched with a sand storage cavity (6), the sand stirring opening (19) is externally threadedly connected with a screw plug (13), the screw plug (13) is internally provided with a sand stirrer (12), one end of the sand stirrer (12) is arranged in the sand stirring opening (19), and the screw plug (13) and the sand stirring opening (19) are connected with a second sealing gasket (14).

9. The sand injection seat valve according to claim 8, wherein, The sand outlet pipe (10) is fixedly connected with the sand outlet opening (9) through a second nut (28), and the sand outlet pipe (10) and the sand outlet opening (9) are connected with a first sealing gasket (11), and a third sealing gasket (15) is arranged at the sand inlet opening (5) and used for sealing between the sand distribution valve and the sand box.

10. The sand injection valve according to claim 9, wherein, The air inlet seat (2) is fixedly connected with the valve body (1) through a hexagonal bolt (18), and the hexagonal bolt (18) is connected with a spring washer (27) and a flat washer (20).

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