Sand pipe connection and sanding unit

Abstract

This invention relates to the field of rail vehicle technology, specifically disclosing a sand-spreading pipe connection device and a sand-spreading unit. The sand-spreading pipe connection device includes a mounting base, a guide plate rotatably disposed on the mounting base, a connector located below the guide plate, and a flexible component connecting the guide plate and the connector. The guide plate has a vertically penetrating sand-falling port, and the connector has a sand-falling channel communicating with the sand-falling port. The sand-falling port includes a funnel-shaped guide portion recessed from the top surface of the guide plate. In the sand-spreading pipe connection device and sand-spreading unit provided by this invention, the connector can rotate with the guide plate and also swing to a certain extent relative to the rotation axis of the guide plate. This reduces the stress at the connection between the sand-spreading pipe and the connector, preventing loosening or detachment of the connection between the sand-spreading pipe and the connector.

Description

Technical Field

[0001] This invention relates to the field of rail vehicle technology, and in particular to a sand-spreading pipe connection device and a sand-spreading unit. Background Technology

[0002] Sand spreading equipment is used to spread sand between the wheels and the rails when rail vehicles are running, in order to increase the coefficient of friction between the wheels and the rails and ensure the safe and reliable operation of rail vehicles.

[0003] like Figure 1 As shown, the existing sand spreading equipment includes a sand spreading unit 100', a sand box 200 connected to the sand spreading unit 100', and a sintered plate 300 located between the sand spreading unit 100' and the sand box 200. The sand box 200 is used to store sand particles. The sand spreading unit 100' includes a fixed base 110, a sand outlet pipe 120 connected to the fixed base 110, an exhaust pipe 130, and a sand spreading pipe connecting device 10; a channel 140 is formed in the fixed base 110, the channel 140 has an interface S for connecting compressed gas and an interface T for connecting dry gas; the sand outlet pipe 120 and the exhaust pipe 130 both extend into the sand box 200, the sand spreading unit 100' also includes a sand spreading cover 150 covering one end of the sand outlet pipe 120 extending into the sand box 200, and an exhaust cover 160 covering one end of the exhaust pipe 130 extending into the sand box 200, the sand spreading pipe connecting device 10 is used to connect the sand spreading pipe, and the sand outlet pipe 120 and the exhaust pipe 130 are both connected to the sand spreading pipe.

[0004] When the sand spreading equipment is working, interface S is connected to compressed air. The compressed air can pass through the sintering plate 300 and enter the sand box 200. A portion of the compressed air entering the sand box 200 blows the sand particles, causing them to pass through the gap between the sand spreading hood 150 and the sand outlet pipe 120 and enter the sand outlet pipe 120 (e.g., Figure 1 As indicated by arrow A in the diagram), and then discharged from the sand-spreading pipe along with the sand particles; another portion of compressed air enters the sand box 200, passes through the sand particles in the sand box 200, loosens the sand particles, and then enters the exhaust pipe 130 through the exhaust hood 160 (as shown in the diagram). Figure 1 As shown by the middle arrow B), it enters the exhaust pipe 130 and then exits through the sand spray pipe.

[0005] The sand spreading unit 100' also includes a heating component 400 extending into the channel 140. When it is necessary to dry the sand particles in the sand box 200, the interface T is connected to the drying gas. After being heated by the heating component 400, the drying gas passes through the sintering plate 300 and enters the sand box 200 to dry the sand particles in the sand box 200. Then, it enters the exhaust pipe 130 through the exhaust hood 160 and is finally discharged from the sand spreading pipe.

[0006] In existing sand spreading units, the sand spreading pipe connection device is fixedly connected to the sand spreading pipe through a joint. During the operation of the rail vehicle, the bending and expansion of the sand spreading pipe and the accumulation of snow and ice on the sand spreading pipe in winter will cause great stress at the connection between the sand spreading pipe and the joint, which will lead to the loosening or detachment of the connection between the sand spreading pipe and the joint, thereby affecting the safety of the rail vehicle operation. Summary of the Invention

[0007] The purpose of this invention is to provide a sand-spreading pipe connection device and a sand-spreading unit that can reduce stress at the connection between the sand-spreading pipe and the joint.

[0008] To achieve the above objectives, the present invention proposes a sand-spreading pipe connection device, including a mounting base, a guide plate disposed on the mounting base, and a connector located below the guide plate. The guide plate has a vertically penetrating sand drop port, and the connector has a sand drop channel communicating with the sand drop port. The sand drop port includes a funnel-shaped guide portion recessed from the top surface of the guide plate.

[0009] The guide plate is rotatably mounted relative to the mounting base. The sand-spraying pipe connection device also includes a flexible component that connects the guide plate and the connector, so that the connector can swing relative to the rotation axis of the guide plate and rotate with the guide plate.

[0010] As a further improvement of the present invention, the flexible element is annular and fits the guide plate and the connector.

[0011] As a further improvement of the present invention, the mounting base includes a base body and a first receiving groove formed by recessing from the top surface of the base body. At least a portion of the flow guide disk is rotatably disposed in the first receiving groove. The mounting base also includes a cover plate disposed on the top surface of the base body, and the cover plate abuts against the flow guide disk in the vertical direction.

[0012] As a further improvement of the present invention, the sand-spraying pipe connection device further includes a support member disposed on the mounting base for supporting the rotation of the guide plate.

[0013] As a further improvement of the present invention, the support member is disposed around the connector and below the guide plate. The support member is a thrust bearing, and its upper and lower ends respectively abut against the guide plate and the mounting base.

[0014] As a further improvement of the present invention, the connector includes a connector body and a hemispherical connecting portion connected above the connector body. The sand-spraying pipe connecting device also includes a limiting member provided on the mounting base. The limiting member has a spherical surface that mates with the connecting portion. There is a gap between the connector and the guide plate that allows the connector to swing relative to the rotation axis of the guide plate.

[0015] As a further improvement of the present invention, the gap is annular and its diameter gradually decreases from top to bottom, and the flexible member is located above the gap.

[0016] As a further improvement of the present invention, the limiting member includes a separable first limiting part and a second limiting part, the second limiting part being located above the first limiting part, and both the first limiting part and the second limiting part including a portion of the spherical surface.

[0017] As a further improvement of the present invention, the seat body further includes a second receiving groove formed by recessing downward from the first receiving groove, the support member and at least a portion of the limiting member are located in the second receiving groove, and the support member is located around the limiting member.

[0018] The present invention also provides a sand spreading unit, which includes the sand spreading pipe connection device described above.

[0019] The beneficial effects of this invention are:

[0020] In the sand-spreading pipe connection device and sand-spreading unit provided by the present invention, the joint can rotate with the guide plate and also swing to a certain extent relative to the rotation axis of the guide plate. In this way, the stress at the connection between the sand-spreading pipe and the joint can be reduced, and the connection between the sand-spreading pipe and the joint can be prevented from loosening or falling off. Attached Figure Description

[0021] Figure 1 This is a cross-sectional structural diagram of a sand spreading device in the prior art;

[0022] Figure 2 This is a top view schematic diagram of a sand-spreading pipe connection device provided in an embodiment of the present invention;

[0023] Figure 3 for Figure 2 A schematic diagram of the structure of the sand-spreading pipe connection device after being cut open from the CC direction;

[0024] Figure 4 for Figure 3 A magnified structural diagram of point D in the middle;

[0025] Figure 5 for Figure 2 Exploded structural diagram of the sand-spreading pipe connection device in the middle;

[0026] Figure 6 This is a schematic diagram of the structure of a sand-spreading unit provided in an embodiment of the present invention. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any modifications to the mechanism, method, or function made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0028] The terms used herein, such as "up," "down," "left," "right," "front," and "back," indicating spatial relative position, are for illustrative purposes to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It is understood that, depending on the product's placement, these terms may be intended to include different orientations besides those shown in the figures, and should not be construed as limiting the claims. Furthermore, the descriptive term "horizontal" used herein is not entirely equivalent to being perpendicular to the direction of gravity, and allows for a certain angle of inclination.

[0029] like Figure 2-5 As shown, an embodiment of the present invention provides a sand-spreading pipe connection device 10. The sand-spreading pipe connection device 10 includes a mounting base 1, a guide plate 2 rotatably mounted on the mounting base 1, a connector 3 located below the guide plate 2, and a flexible member 4 connecting the guide plate 2 and the connector 3. The flexible member 4 is made of an elastic material such as rubber or silicone. A vertically penetrating sand drop port 21 is formed inside the guide plate 2. The connector 3 has a sand drop channel 31 communicating with the sand drop port 21. The sand drop port 21 includes a funnel-shaped guide portion 211 recessed from the top surface of the guide plate 2. The diameter of the upper end of the guide portion 211 is larger than the diameter of its lower end, so that sand particles in the sand box can enter the sand drop channel 31 through the sand drop port 21. The connector 3 is used to connect a sand-spreading pipe (not shown in the figure). After the sand particles enter the sand drop channel 31, they enter the sand-spreading pipe through the sand drop channel 31 and finally fall from the sand-spreading pipe between the wheel and the track. The connector 3 and the sand-spreading pipe are specifically connected by a clamping nut 8.

[0030] In this embodiment, the connector 3 and the guide plate 2 are connected by a flexible component 4, so that the connector 3 can rotate with the guide plate 2 while remaining relatively independent of the rotation axis of the guide plate 2 (e.g., ...). Figure 3 (As shown by the dotted line L in the figure) make a certain degree of oscillation, so as to reduce the stress at the connection between the sand-spreading pipe and the connector 3 and prevent the connection between the sand-spreading pipe and the connector 3 from loosening or falling off.

[0031] Furthermore, the flexible component 4 is annular and fits into the guide plate 2 and the connector 3. This arrangement enables the flexible component 4 to play a sealing role, so that after the sand particles enter the sand drop port 21, they can only fall into the sand drop channel 31 and will not leak to other positions in the mounting base 1.

[0032] In this embodiment, the mounting base 1 includes a base body 11 and a first receiving groove 12 formed by a recess in the top surface of the base body 11. At least a portion of the guide plate 2 is rotatably disposed within the first receiving groove 12. The mounting base 1 also includes a cover plate 13 disposed on the top surface of the base body 11. The cover plate 13 and the guide plate 2 abut against each other in the vertical direction. The cover plate 13 is used to prevent the guide plate 2 from detaching upward from the base body 11, thereby limiting the position of the guide plate 2 relative to the base body 11. To prevent the cover plate 13 from obstructing the sand discharge port 21, a through slot 131 may also be provided on the cover plate 13.

[0033] The sand-spreading pipe connection device 10 also includes a support member 5 provided on the mounting base 1. The support member 5 is used to support the guide plate 2 and enable the guide plate 2 to rotate smoothly.

[0034] In a preferred embodiment, the support member 5 is located around the connector 3 and below the guide plate 2. This arrangement makes it difficult for sand particles to flow or leak to the support member 5. A sealing ring 9 can also be provided between the guide plate 2 and the base 11 to further ensure that sand particles do not pass through the gap 7 between the guide plate 2 and the base 11 to the support member 5. It is conceivable that with the above arrangement, the support member 5 is a thrust bearing, and its upper and lower ends abut against the guide plate 2 and the mounting base 1, respectively.

[0035] The connector 3 includes a connector body 32 and a hemispherical connecting portion 33 connected above the connector body 32. The sand-spreading pipe connecting device 10 also includes a limiting member 6 provided on the mounting base 1. The limiting member 6 has a spherical surface 61 that mates with the connecting portion 33. The mate between the connecting portion 33 and the spherical surface 61 allows the connector 3 to rotate with the guide plate 2 and also to swing to a certain extent relative to the rotation axis of the guide plate 2. Furthermore, the limiting member 6 provides support for the connector 3, which reduces the required strength of the flexible member 4. In this embodiment, the flexible member 4 is preferably a rubber membrane.

[0036] To allow the connector 3 to swing relative to the rotation axis of the guide plate 2, a gap 7 is provided between the connector 3 and the guide plate 2, with the flexible element 4 located above the gap 7. Specifically, the gap 7 is annular, and its diameter gradually decreases from top to bottom. This allows sand particles entering the gap 7 to flow out into the sand drop channel 31 under gravity, preventing sand particles from clogging the gap 7. Specifically, the guide plate 2 includes a plate body 22 and a protruding portion 23 extending downwards from the plate body 22. The sand drop port 21 penetrates the plate body 22 and the protruding portion 23, with at least a portion of the protruding portion 23 located within the sand drop channel 31. The gap 7 is formed between the protruding portion 23 and the connector 3.

[0037] The limiting member 6 includes a separable first limiting part 61 and a second limiting part 62. The second limiting part 62 is located above the first limiting part 61, and both the first limiting part 61 and the second limiting part 62 include a partial spherical surface 61. The limiting member 6 is installed in two steps: first, the first limiting part 61 is installed on the lower side of the connecting part 33, and second, the second limiting part 62 is installed on the upper side of the connecting part 33. This facilitates the mating of the spherical surface 61 on the limiting member 6 and the connecting part 33.

[0038] The base 11 also includes a second receiving groove 14 formed by a downward recess from the first receiving groove 12. The support member 5 and at least part of the limiting member 6 are located in the second receiving groove 14, and the support member 5 is located around the limiting member 6. By placing both the support member 5 and the limiting member 6 in the second receiving groove 14, the structure of the sand-spraying unit 100 becomes more compact.

[0039] like Figure 6 As shown, an embodiment of the present invention provides a sand-spreading unit 100, which includes the aforementioned sand-spreading pipe connecting device 10. Specifically, the sand-spreading unit 100 includes a fixing base 110, and the sand-spreading pipe connecting device 10 is connected to the fixing base 110 by screws.

[0040] Other structural features of the sand-spreading unit 100 are similar to those of existing sand-spreading units, and may include a sand outlet pipe connected to the fixed base 110, an exhaust pipe 130, a heating assembly 400, a channel formed within the fixed base 110, a sand-spreading cover 150 covering the end of the sand outlet pipe, and an exhaust cover 160 covering the end of the exhaust pipe 130. The channel has an interface S for connecting compressed gas and an interface T for connecting dry gas. The operating principle of the sand-spreading unit 100 is similar to that of existing sand-spreading units and will not be described in detail here.

[0041] In summary, in the sand-spreading pipe connection device 10 and sand-spreading unit 100 provided by the present invention, the joint 3 can rotate with the guide plate 2 and also swing to a certain extent relative to the rotation axis of the guide plate 2. In this way, the stress at the connection between the sand-spreading pipe and the joint 3 can be reduced, and the connection between the sand-spreading pipe and the joint 3 can be prevented from loosening or falling off.

[0042] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0043] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A sand-spreading pipe connection device, characterized in that, The device includes a mounting base, a guide plate disposed on the mounting base, and a connector located below the guide plate. The guide plate has a vertically penetrating sand drop outlet, and the connector has a sand drop channel communicating with the sand drop outlet. The sand drop outlet includes a funnel-shaped guide portion recessed from the top surface of the guide plate. The guide plate is rotatably mounted relative to the mounting base. The sand-spraying pipe connection device also includes a flexible component that connects the guide plate and the connector, so that the connector can swing relative to the rotation axis of the guide plate and rotate with the guide plate.

2. The sand-spreading pipe connecting device according to claim 1, characterized in that, The flexible component is annular and fits into the guide plate and the connector.

3. The sand-spreading pipe connecting device according to claim 1, characterized in that, The mounting base includes a base body and a first receiving groove formed by recessing from the top surface of the base body. At least a portion of the guide plate is rotatably disposed in the first receiving groove. The mounting base also includes a cover plate disposed on the top surface of the base body, and the cover plate abuts against the guide plate in the vertical direction.

4. The sand-spreading pipe connecting device according to claim 3, characterized in that, The sand-spraying pipe connection device also includes a support member disposed on the mounting base for supporting the rotation of the guide plate.

5. The sand-spreading pipe connecting device according to claim 4, characterized in that, The support member is located around the connector and below the guide plate. The support member is a thrust bearing, and its upper and lower ends respectively abut against the guide plate and the mounting base.

6. The sand-spreading pipe connecting device according to claim 5, characterized in that, The connector includes a connector body and a hemispherical connecting portion connected above the connector body. The sand-spraying pipe connecting device also includes a limiting member provided on the mounting base. The limiting member has a spherical surface that mates with the connecting portion. There is a gap between the connector and the guide plate that allows the connector to swing relative to the rotation axis of the guide plate.

7. The sand-spreading pipe connecting device according to claim 6, characterized in that, The gap is annular, and its diameter gradually decreases from top to bottom, with the flexible element located above the gap.

8. The sand-spreading pipe connecting device according to claim 6, characterized in that, The limiting member includes a separable first limiting part and a second limiting part, the second limiting part being located above the first limiting part, and both the first limiting part and the second limiting part including a portion of the spherical surface.

9. The sand-spreading pipe connecting device according to claim 6, characterized in that, The seat also includes a second receiving groove formed by recessing downward from the first receiving groove, the support member and at least a portion of the limiting member are located in the second receiving groove, and the support member is located around the limiting member.

10. A sand-spreading unit, characterized in that, Includes the sand-spreading pipe connection device as described in any one of claims 1-9.

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