Gravity type sand cleaning needle air inlet seat sanding valve for rail transit

Abstract

The invention belongs to the technical field of sand spraying systems, and particularly relates to a gravity type sand cleaning needle air inlet seat sand spraying valve for rail transit. The flow regulating valve comprises a valve body, an air inlet seat is fixedly connected to the valve body, and a flow regulating air valve is fixedly connected to the air inlet seat; a sand inlet and an inclined sand outlet are formed in the valve body, an inclined sand outlet pipe is fixedly connected to the sand outlet, a sand storage cavity, a sand blowing cavity and a sand outlet cavity are formed in the valve body, and the upper end and the lower end 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 is communicated with the top of the sand outlet cavity, and the lower end of the sand outlet cavity is connected with a sand outlet. A sand cleaning block is rotationally connected into the valve body; the sand cleaning block is rotationally connected into the valve body, and when the sand cleaning block rotates, sand grains in the sand storage cavity are driven to flow into the sand blowing cavity, so that the space between the sand storage cavity and the sand blowing cavity is quickly dredged, and the blockage problem is solved.

Description

Technical Field

[0001] This invention relates to the field of sand spreading system technology, and in particular to a gravity-type sand-spreading valve with an air inlet for rail transit. Background Technology

[0002] Currently, when locomotives and other rail transit vehicles start, climb, or brake, they spray quartz sand through the sand spraying valve of the sand spraying system to the space between the rails and wheels, increasing the friction between the wheels and rails and preventing the wheels from slipping and dragging, thus damaging the wheels and rails.

[0003] Existing patent CN211995554U discloses a gravity-type sand-blowing nozzle and sand-spreading valve for rail transit, including an air inlet seat, a first sand-blowing nozzle, and a second sand-blowing nozzle. The valve body has an air-blowing chamber connecting a sand storage chamber and a sand outlet, with the air-blowing chamber penetrating the valve body to form an air outlet. The air inlet seat is mounted on the air outlet. The first and second sand-blowing nozzles are screwed and embedded in the air inlet seat. The first sand-blowing nozzle is inclined towards one end of the air-blowing chamber and a baffle, while the second sand-blowing nozzle is inclined towards the other end of the air-blowing chamber and the sand outlet. The air inlet end of the first sand-blowing nozzle is connected to the air outlet end of the second sand-blowing nozzle, and the air inlet end of the second sand-blowing nozzle is connected to the air inlet channel of the air inlet seat. This invention can improve sand-spreading efficiency, adjust the sand-spreading amount, effectively reduce the use and maintenance costs of the sand-spreading valve, and improve the driving safety of rail transit.

[0004] However, the gravity-type sand spreader in this patented technology has the following drawbacks: 1. The first and second sand blowing nozzles are prone to sand accumulation and blockage, causing the gravity sand spreader to fail.

[0005] 2. A partition is provided between the sand storage chamber and the air blowing chamber, which forms a narrow U-shaped channel between the sand storage chamber and the air blowing chamber. This channel is prone to sand accumulation and blockage and is inconvenient to clean. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a gravity-type sand-cleaning needle air inlet sand-spreading valve for rail transit. By rotating and connecting a cleaning block within the valve body, it can clean the sand storage chamber and the sand-blowing chamber, aiming to solve the problems in the background technology.

[0007] To achieve the above-mentioned technical objectives, the specific technical solution of the present invention is as follows: The present invention proposes a gravity-type sand-cleaning needle air-inlet sand-spreading valve for rail transit, comprising a valve body, an air inlet fixedly connected to the valve body, and a flow regulating valve fixedly connected to the air inlet; the valve body is provided with a sand inlet and an inclined sand outlet, and an inclined sand outlet pipe is fixedly connected to the sand outlet; the valve body is provided with a sand storage chamber, a sand blowing chamber, and a sand outlet chamber inside, wherein the upper and lower ends of the sand storage chamber are respectively connected to the sand inlet and the sand blowing chamber; a baffle is provided between the sand blowing chamber and the sand outlet chamber, the tops of the sand blowing chamber and the sand outlet chamber are interconnected, and the lower end of the sand outlet chamber is connected to the sand outlet; a sand-cleaning block is rotatably connected inside the valve body for cleaning the sand storage chamber and the sand blowing chamber, and the sand-cleaning block is located between the sand storage chamber and the sand blowing chamber.

[0008] Furthermore, the sand cleaning block includes a sand cleaning section and a baffle located at the lower end of the sand cleaning section. The baffle is used to separate the sand storage chamber and the sand blowing chamber, and the top of the valve body is provided with an arc groove that rotates with the sand cleaning section.

[0009] Furthermore, a rotating handle is connected to the sand-cleaning block, and the rotating handle is located outside the valve body.

[0010] Furthermore, the air intake seat is provided with an air inlet, and a first sand blowing nozzle and a second sand blowing nozzle are installed on the air intake seat; wherein, the first sand blowing nozzle blows air towards the sand blowing chamber, and the second sand blowing nozzle blows air towards the sand outlet chamber; the cross-sections of the first sand blowing nozzle and the second sand blowing nozzle are both gradually expanding structures.

[0011] Furthermore, a filter screen is connected to the first sand blowing nozzle, and a receiving groove is provided in the air inlet seat. A sand cleaning needle assembly is installed in the receiving groove for cleaning the second sand blowing nozzle.

[0012] Furthermore, the sand-cleaning needle assembly includes a sand-cleaning needle, a return spring, a sand-cleaning needle mounting base, a first sealing ring, and a second sealing ring. The return spring is used to reset the sand-cleaning needle, and the end of the sand-cleaning needle near the second sand-blowing nozzle is designed with a pointed structure.

[0013] Furthermore, the flow regulating valve is provided with an air inlet and an air outlet, an airflow channel is provided between the air inlet and the air outlet, the air outlet is sealed to the air inlet, and an adjusting bolt is connected to the flow regulating valve. One end of the adjusting bolt extends into the airflow channel, and a first locking nut is connected to the adjusting bolt.

[0014] Furthermore, the bottom of the valve body is provided with a sand stirring port that mates with the sand storage chamber. A screw plug is threaded to the outside of the sand stirring port, and a sand stirrer is installed inside the screw plug. One end of the sand stirrer is located inside the sand stirring port, and a second sealing gasket is connected between the screw plug and the sand stirring port.

[0015] Furthermore, the sand outlet pipe is fixedly connected to the sand outlet port by a second nut, and a first sealing gasket is connected between the sand outlet pipe and the sand outlet port, and a third sealing gasket is installed at the sand inlet port to seal the sand spreading valve and the sand box.

[0016] Furthermore, the air intake seat is fixedly connected to the valve body by hexagonal bolts, and spring washers and flat washers are connected to the hexagonal bolts.

[0017] The beneficial effects of this invention are as follows: 1. The present invention has a sand cleaning block rotatably connected to the valve body. The sand cleaning block is equipped with a cleaning cloth and a baffle. When the sand cleaning block rotates, the channel between the sand storage chamber and the sand blowing chamber increases and widens. The cleaning part squeezes the sand particles in the sand storage chamber, causing the sand particles in the sand storage chamber to flow into the sand blowing chamber, thereby quickly clearing the blockage between the sand storage chamber and the sand blowing chamber and eliminating the blockage problem.

[0018] 2. The present invention uses a first sand blowing nozzle to blow compressed air directly onto the sand particles in the sand spreader, which disperses and lifts the quartz sand. Then, the second sand blowing nozzle blows the quartz sand out. Even if there are slight clumps of quartz sand in the sand spreader, they will be directly dispersed by the compressed air, and there will be no phenomenon of sand not being able to be sprayed out due to sand particles clumping. In addition, the filter screen configured on the first sand blowing nozzle can effectively prevent the nozzle opening from being blocked.

[0019] 3. This invention allows for adjustment of the air intake of the sand spreader via a flow regulating valve according to driving conditions, thereby achieving adjustable sand spreading volume, eliminating waste, reducing costs, and being applicable to a wider variety of sand particles, effectively reducing operating costs.

[0020] 4. The second sand blowing nozzle of this invention adopts a sand cleaning needle structure. The cross-section of the second sand blowing nozzle is a gradually expanding structure, which can effectively reduce the flow rate of compressed air during sand stirring and blowing, reduce the impact force of quartz sand on the valve body during the sand spreading process, and effectively improve the service life of the sand spreader. When the sand cleaning needle is configured to block the second sand blowing nozzle with quartz sand, the sand spreader can be eliminated without disassembling it. By pressing the sand cleaning needle, the blockage problem can be eliminated, effectively reducing the use and maintenance cost of the sand spreader. Attached Figure Description

[0021] Figure 1 This is a cross-sectional schematic diagram of the gravity-type sand-cleaning needle air inlet seat sand-spreading valve for rail transit of the present invention.

[0022] Figure 2 This is a top view schematic diagram of the gravity-type sand-cleaning needle air inlet seat sand-spreading valve for rail transit of the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of the sand-cleaning block proposed in this invention.

[0024] Figure 4This is a schematic diagram of the sand-spreading valve for rail transit using the gravity-type sand-cleaning needle air inlet seat during sand cleaning.

[0025] Figure 5 This is a cross-sectional schematic diagram of the air intake seat proposed in this invention.

[0026] Figure 6 This is a cross-sectional schematic diagram of the flow regulating valve proposed in this invention.

[0027] The corresponding names of the attached figures are as follows: 1. Valve body; 2. Air inlet seat; 3. Flow regulating valve; 31. Air inlet nozzle; 32. Air outlet head; 33. Adjusting bolt; 34. First locking nut; 35. Airflow channel; 4. Sand cleaning block; 41. Sand cleaning section; 42. Baffle; 5. Sand inlet; 6. Sand storage chamber; 7. Sand blowing chamber; 8. Sand outlet chamber; 9. Sand outlet; 10. Sand outlet pipe; 11. First sealing gasket; 12. Sand stirrer; 13. Plug; 14. Second sealing gasket; 15. 16. Third sealing gasket; 17. Baffle; 18. Rotating handle; 19. Hex bolt; 20. Sand stirring port; 21. Flat washer; 22. First sand blowing nozzle; 23. Filter screen; 24. Second sand blowing nozzle; 25. Sand cleaning needle assembly; 26. Sand cleaning needle; 27. Sand cleaning needle mounting base; 28. Return spring; 29. ​​First sealing ring; 20. Second sealing ring; 20. Receiving groove; 21. Air inlet; 22. Spring washer; 23. Second nut; 20. Arc groove. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] Example: This example discloses a gravity-type sand-spreading valve with an air inlet for rail transit, such as... Figures 1-6As shown, the device includes a valve body 1, which is fixedly connected to a sand box. A nameplate is affixed to the valve body 1. An air inlet seat 2 is fixedly connected to the valve body 1 and connected to an external air pipe. A flow regulating valve 3 is fixedly connected to the air inlet seat 2 to adjust the air intake. The valve body 1 has a sand inlet 5 and an inclined sand outlet 9. A third sealing gasket 15 is installed at the sand inlet 5 to seal the connection between the sand spreading valve and the sand box. Sand particles from the sand box enter the valve body 1 through the sand inlet 5. An inclined sand outlet pipe 10 is fixedly connected to the sand outlet 9 to guide the sand particles out. The valve body 1 contains a sand storage chamber 6, a sand blowing chamber 7, and a sand outlet chamber 8. The lower end of the sand storage chamber 6 is inclined towards the sand blowing chamber 7. The upper and lower ends of the sand storage chamber 6 are respectively connected to the sand inlet 5, the sand blowing chamber 7, and the sand outlet 8. The sand blowing chamber 7 is connected; a baffle 16 is provided between the sand blowing chamber 7 and the sand outlet chamber 8, which separates the sand blowing chamber 7 and the sand outlet chamber 8, and the tops of the sand blowing chamber 7 and the sand outlet chamber 8 are interconnected. The lower end of the sand outlet chamber 8 is connected to the sand outlet 9; the sand particles pass through the sand storage chamber 6, the sand blowing chamber 7, the sand outlet chamber 8 and the sand outlet 9 in sequence from the sand inlet 5, and finally flow out from the sand outlet pipe 10; furthermore, a sand cleaning block 4 is rotatably connected inside the valve body 1, which is used to clean the sand storage chamber 6 and the sand blowing chamber 7. The sand cleaning block 4 is sealed to the rotating part of the valve body 1. The sand cleaning block 4 is located on the side of the sand storage chamber 6 near the sand blowing chamber 7. The sand cleaning block 4 is located between the sand storage chamber 6 and the sand blowing chamber 7. The sand cleaning block 4 makes the sand storage chamber 6 and the sand blowing chamber 7 form a U-shaped meandering channel, which avoids a large number of sand particles from directly entering the sand blowing chamber 7.

[0030] Preferably, the bottom of the valve body 1 is provided with a sand stirring port 19 that mates with the sand storage chamber 6. A screw plug 13 is threadedly connected to the outside of the sand stirring port 19. A sand stirrer 12 is installed inside the screw plug 13. One end of the sand stirrer 12 is located inside the sand stirring port 19, and a second sealing gasket 14 is connected between the screw plug 13 and the sand stirring port 19. The sand stirrer 12 and the screw plug 13 rotate synchronously. When the quartz sand is severely agglomerated, the screw plug 13 can be used to drive the sand stirrer 12 to mechanically disperse the quartz sand.

[0031] Preferably, the sand outlet pipe 10 is fixedly connected to the sand outlet 9 by the second nut 28, and a first sealing gasket 11 is connected between the sand outlet pipe 10 and the sand outlet 9.

[0032] 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.

[0033] 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.

[0034] The first sand-blowing nozzle 21 is connected to a filter screen 22 to effectively prevent clogging. The air inlet seat 2 is provided with a receiving groove 25, and a sand-cleaning needle assembly 24 is installed in the receiving groove 25 for cleaning the second sand-blowing nozzle 23. The sand-cleaning needle assembly 24 includes a sand-cleaning needle 241, a return spring 243, and a sand-cleaning needle mounting seat 242. The sand-cleaning needle mounting seat 242 is fixedly installed in the receiving groove 25. The return spring 243 is used to reset the sand-cleaning needle 241. When the sand-cleaning needle 241 moves toward the second sand-blowing nozzle 23, the return spring 243 is compressed. The end of the sand-cleaning needle 241 near the second sand-blowing nozzle 23 is designed with a pointed structure to facilitate the unblocking and cleaning of the second sand-blowing nozzle 23. A first sealing ring 244 is installed between the sand-cleaning needle mounting seat 242 and the sand-cleaning needle 241, and a second sealing ring 245 is installed between the sand-cleaning needle mounting seat 242 and the inner wall of the receiving groove 25 to seal the air inlet seat 2 and prevent sand particles from being exposed.

[0035] like Figure 6 As shown, the flow regulating valve 3 is equipped with an air inlet 31 and an air outlet 32. An airflow channel 35 is provided between the air inlet 31 and the air outlet 32. The air outlet 32 ​​is threadedly sealed to the air inlet 26. An adjusting bolt 33 is connected to the flow regulating valve 3. One end of the adjusting bolt 33 extends into the airflow channel 35. A first locking nut 34 is connected to the adjusting bolt 33. By changing the length of the adjusting bolt 33 inserted into the airflow channel 35, the air intake can be adjusted, and the sand discharge speed can be adjusted to match the different travel speeds of the sand spreading machine.

[0036] Finally, it should be noted that in the description of this invention, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gravity-type sand-spreading valve for rail transit, comprising a valve body (1), characterized in that, An air inlet seat (2) is fixedly connected to the valve body (1), and a flow regulating valve (3) is fixedly connected to the air inlet seat (2). The valve body (1) is provided with a sand inlet (5) and an inclined sand outlet (9). An inclined sand outlet pipe (10) is fixedly connected to the sand outlet (9). The valve body (1) is provided with a sand storage chamber (6), a sand blowing chamber (7) and a sand outlet chamber (8) inside. The upper and lower ends of the sand storage chamber (6) are connected to the sand inlet (5) and the sand blowing chamber (7) respectively. A baffle (16) is provided between the sand blowing chamber (7) and the sand discharge chamber (8). The tops of the sand blowing chamber (7) and the sand discharge chamber (8) are connected to each other, and the lower end of the sand discharge chamber (8) is connected to the sand discharge port (9). The valve body (1) is rotatably connected to a sand cleaning block (4) for cleaning the sand storage chamber (6) and the sand blowing chamber (7), and the sand cleaning block (4) is located between the sand storage chamber (6) and the sand blowing chamber (7).

2. The gravity-type sand-cleaning needle air inlet sand-spreading valve for rail transit according to claim 1, characterized in that, The sand cleaning block (4) includes a sand cleaning part (41) and a baffle (42) located at the lower end of the sand cleaning part (41). 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 part (41).

3. A gravity-type sand-cleaning needle air inlet sand-spreading valve for rail transit according to claim 2, characterized in that, The sand-cleaning block (4) is connected to a rotating handle (17), which is located outside the valve body (1).

4. A gravity-type sand-cleaning needle air inlet sand-spreading valve for rail transit according to claim 3, characterized in that, The air inlet (2) is provided with an air inlet (26), and the air inlet (2) is equipped with a first sand blowing nozzle (21) and a second sand blowing nozzle (23); wherein, the first sand blowing nozzle (21) blows air towards the sand blowing chamber (7), and the second sand blowing nozzle (23) blows air towards the sand outlet chamber (8); the cross-section of the first sand blowing nozzle (21) and the second sand blowing nozzle (23) is a gradually expanding structure.

5. A gravity-type sand-cleaning needle air inlet sand-spreading valve for rail transit according to claim 4, characterized in that, A filter screen (22) is connected to the first sand blowing nozzle (21), and a receiving groove (25) is provided in the air inlet seat (2). A sand cleaning needle assembly (24) is installed in the receiving groove (25) for cleaning the second sand blowing nozzle (23).

6. A gravity-type sand-cleaning needle air inlet sand-spreading valve for rail transit according to claim 5, characterized in that, The sand-cleaning needle assembly (24) includes a sand-cleaning needle (241), a reset spring (243), a sand-cleaning needle mounting base (242), a first sealing ring (244), and a second sealing ring (245). The reset spring (243) is used to reset the sand-cleaning needle, and the end of the sand-cleaning needle (241) near the second sand-blowing nozzle (23) is set as a pointed structure.

7. A gravity-type sand-cleaning needle air inlet sand-spreading valve for rail transit according to claim 6, characterized in that, The flow regulating valve (3) is provided with an air inlet (31) and an air outlet (32). An airflow channel (35) is provided between the air inlet (31) and the air outlet (32). The air outlet (32) is sealed to the air inlet (26). An adjusting bolt (33) is connected to the flow regulating valve (3). One end of the adjusting bolt (33) extends into the airflow channel (35). A first locking nut (34) is connected to the adjusting bolt (33).

8. A gravity-type sand-cleaning needle air inlet sand-spreading valve for rail transit according to claim 7, characterized in that, The bottom of the valve body (1) is provided with a sand stirring port (19) that cooperates with the sand storage chamber (6). The sand stirring port (19) is externally threaded with a screw plug (13). A sand stirrer (12) is installed inside the screw plug (13). One end of the sand stirrer (12) is located inside the sand stirring port (19), and a second sealing gasket (14) is connected between the screw plug (13) and the sand stirring port (19).

9. A gravity-type sand-cleaning needle air inlet sand-spreading valve for rail transit according to claim 8, characterized in that, The sand outlet pipe (10) is fixedly connected to the sand outlet (9) by the second nut (28), and a first sealing gasket (11) is connected between the sand outlet pipe (10) and the sand outlet (9), and a third sealing gasket (15) is installed at the sand inlet (5) to seal the sand spreading valve and the sand box.

10. A gravity-type sand-cleaning needle air inlet sand-spreading valve for rail transit according to claim 9, characterized in that, 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).

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