Differential pressure type sander with adjustable sanding amount applied to low-floor tramcar

Abstract

A differential pressure type sander with the adjustable sanding amount and applied to a low-floor tramcar comprises a mounting plate used for being connected with a sand box, a sanding body fixedly connected to the lower portion of the mounting plate and a sanding cover connected to the upper end of the sanding body, and an inner cavity and an air channel are formed in the sanding body. The sand spraying main body is provided with an inner cavity, a gas path is arranged in the inner cavity, the gas path is communicated with the inner cavity through a vent hole in the upper end of the sand spraying main body, a rotatable adjusting pipe body is arranged in the inner cavity, a first sand inlet is formed in the sand spraying main body, a second sand inlet is formed in the adjusting pipe body, and the first sand inlet and the second sand inlet correspond to each other in height position. The adjusting pipe body is manually rotated, so that the relative positions of the first sand inlet and the second sand inlet are staggered to different degrees, and the sand spraying amount is adjusted; according to the differential pressure type sander, mechanical adjustment is carried out by manually rotating the adjusting pipe body, and the sanding amount is controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of brake systems for low-floor trams, in particular to a pressure differential type sand spreader with adjustable sand spreading amount used in low-floor trams. Background Art

[0002] When the train is decelerating or braking, it is necessary to increase the adhesion between the wheel hub and the track to ensure reliable and stable deceleration of the wheel. The sand spreading device can provide gravel to increase the adhesion between the wheel hub and the track to assist the train in reliable braking; in order to spray the gravel evenly, a sand spreader is configured in the sand spreading device, and the sand spreader needs to spray the gravel evenly.

[0003] At present, there are many types of sand spreaders used on vehicles. Some sand spreaders cannot adjust the amount of sand they spread; some sand spreaders are complicated to adjust the amount of sand they spread, and require measures such as replacing shrinkage holes or shrinkage plugs, which results in the sand spreaders being unable to be effectively interchanged on vehicles. Summary of the invention

[0004] In view of the shortcomings existing in the above problems, the utility model provides a pressure difference type sand spreader with adjustable sand spreading amount for low-floor trams.

[0005] To achieve the above-mentioned purpose, the utility model provides a pressure differential sand spreader with adjustable sand spreading amount for low-floor trams, comprising a mounting plate for connecting with a sand box, a sand spreading body fixedly connected to the bottom of the mounting plate, and a sand spreading cover connected to the upper end of the sand spreading body, the sand spreading body is formed with an inner cavity and an air path, the air path is connected with the inner cavity through an air vent at the upper end of the sand spreading body, a rotatable adjustment tube body is provided in the inner cavity, a first sand inlet is formed on the sand spreading body, and a second sand inlet is formed on the adjustment tube body, the first sand inlet and the second sand inlet are corresponding in height, and the adjustment tube body is manually rotated to stagger the relative positions of the first sand inlet and the second sand inlet to different degrees, thereby achieving the adjustment of the amount of sand spreading.

[0006] Furthermore, a first sealing gasket is arranged between the mounting plate and the sand box, and a second sealing gasket is arranged between the mounting plate and the sand spreading body.

[0007] Furthermore, the sand-spreading cover is connected to the sand-spreading body via threads, a sealing gasket three is arranged in the sand-spreading body, and an air cavity is formed between the sand-spreading cover and the sand-spreading body due to the sealing effect of the sealing gasket three.

[0008] Furthermore, the top of the sand spreading cover is conical.

[0009] Furthermore, an air outlet is provided at the vent hole, and a throttling hole is formed at the lower part of the air outlet.

[0010] Furthermore, the air outlet nozzle is screwed onto the vent hole through threads and sealed by a sealing gasket 4.

[0011] Furthermore, the first sand inlet, the second sand inlet, and the lower edges of the sand spreading cover are flush with each other.

[0012] Furthermore, the lower part of the adjustment tube body has an integrated connection disk, and an arc track is formed on the disk surface of the connection disk. A locking screw is screwed on the lower part of the sand spreading body, and the locking screw is also located in the arc track.

[0013] Furthermore, there are two arc-shaped tracks, and correspondingly, there are also two locking screws.

[0014] Furthermore, the outer end of the gas circuit is connected to an air inlet joint, and the lower end of the adjustment tube body is connected to a sand spreading joint.

[0015] The beneficial effects of the utility model compared with the prior art are:

[0016] 1. Throttling and shrinkage hole technology: By designing a Φ2.3 throttle hole on the air outlet nozzle, the compressed air transported into the air cavity through the air path forms a high-pressure area, and is sprayed into the inner cavity of the sand spreading body through the Φ2.3 throttle hole, forming a siphon effect, so that the sand and gravel are sucked into the adjustment tube body through the first sand inlet and the second sand inlet, and the sand and gravel are discharged from the bottom of the adjustment tube body along with the compressed air.

[0017] 2. Sand spreading action protection technology: The lower edges of the sand spreading cover, the first sand inlet and the second sand inlet are flush. In the absence of compressed air supply, no sand will be automatically discharged even when the train is running.

[0018] 3. Mechanically adjust the sanding amount technology: The second sand inlet of the adjustment tube body is a 12×6 long hole. When the second sand inlet of the adjustment tube body and the first sand inlet of the sanding body are completely overlapped, the sanding amount is the largest, which can basically reach 1000 g / min. Use an Allen wrench to loosen the two M6 locking screws that fix the adjustment tube body, and manually rotate the adjustment tube body. When the second sand inlet of the adjustment tube body and the first sand inlet of the sanding body are completely offset, the second sand inlet of the adjustment tube body is blocked by the sanding body, and the sanding amount is the least, which is basically zero. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of a differential pressure sand spreader with adjustable sand spreading amount for use in low-floor trams;

[0020] Figure 2A three-dimensional diagram of a differential pressure sand spreader with adjustable sand spreading amount for use in low-floor trams;

[0021] Figure 3 An exploded view of a differential pressure sand spreader with adjustable sand spreading amount for use in low-floor trams;

[0022] Figure 4 for Figure 3 A cross-sectional view of

[0023] Figure 5 This is a schematic diagram of the differential pressure sand spreader installed at the bottom of the sand box.

[0024] In the figure: 1. sand box; 2. sealing gasket 1; 3. mounting plate; 4. sealing gasket 2; 5. sand spreading body; 51. inner cavity; 52. air path; 53. vent; 54. first sand inlet; 6. sand spreading cover; 7. sealing gasket 3; 8. sealing gasket 4; 9. air outlet; 91. throttle hole; 10. adjustment tube body; 101. second sand inlet; 102. connecting plate; 1021. arc track; 11. air inlet connector; 12. sand spreading connector; a. air cavity; 13. locking screw. DETAILED DESCRIPTION

[0025] like Figures 1 to 5As shown, a pressure differential sand spreader with adjustable sand spreading amount for low-floor trams according to an embodiment of the utility model comprises a mounting plate 3 for connecting with a sand box 1, a sand spreading body 5 fixedly connected to the bottom of the mounting plate 3, and a sand spreading cover 6 connected to the upper end of the sand spreading body 5. An inner cavity 51 and an air path 52 are formed on the sand spreading body 5. The air path 52 is connected to the inner cavity 51 through an air vent 53 at the upper end of the sand spreading body 5. A rotatable adjustment tube 10 is provided in the inner cavity 51. A first sand inlet 54 is formed on the sand-spreading body 5, and a second sand inlet 101 is formed on the adjusting tube body 10. The first sand inlet 54 and the second sand inlet 101 correspond in height. The adjusting tube body 10 is manually rotated to stagger the relative positions of the first sand inlet 54 and the second sand inlet 101 to different degrees, so as to adjust the amount of sand spread. A sealing gasket 2 is arranged between the mounting plate 3 and the sand box 1, and a sealing gasket 4 is arranged between the mounting plate 3 and the sand-spreading body 5. The sand cover 6 is connected to the sand spreading body 5 by threads, a sealing gasket 37 is arranged in the sand spreading body 5, and an air cavity a is formed between the sand spreading cover 6 and the sand spreading body 5 by the sealing effect of the sealing gasket 37; the top of the sand spreading cover 6 is conical; an air outlet 9 is arranged at the vent 53, and a throttle hole 91 is formed at the lower part of the air outlet 9; the air outlet 9 is screwed on the vent 53 by threads and sealed by the sealing gasket 48; the first sand inlet 54 and the second sand inlet 101 , the lower edge of the sand-spreading cover 6 is flush; the lower part of the adjustment tube body 10 has an integrated connecting disk 102, and an arc track 1021 is formed on the disk surface of the connecting disk 102. A locking screw 13 is screwed on the lower part of the sand-spreading body 5, and the locking screw 13 is also located in the arc track 1021; there are two arc tracks 1021, and correspondingly, there are also two locking screws 13; the outer end of the air path 52 is connected to the air inlet connector 11, and the lower end of the adjustment tube body 10 is connected to the sand-spreading connector 12.

[0026] The advantages of this differential pressure sand spreader are as follows:

[0027] 1. Throttling and shrinkage hole technology: By designing a Φ2.3 throttle hole on the air outlet nozzle, the compressed air transported into the air cavity through the air path forms a high-pressure area, and is sprayed into the inner cavity of the sand spreading body through the Φ2.3 throttle hole, forming a siphon effect, so that the sand and gravel are sucked into the adjustment tube body through the first sand inlet and the second sand inlet, and the sand and gravel are discharged from the bottom of the adjustment tube body along with the compressed air.

[0028] 2. Sand spreading action protection technology: The lower edges of the sand spreading cover, the first sand inlet and the second sand inlet are flush. In the absence of compressed air supply, no sand will be automatically discharged even when the train is running.

[0029] 3. Mechanically adjust the sanding amount technology: The second sand inlet of the adjustment tube body is a 12×6 long hole. When the second sand inlet of the adjustment tube body and the first sand inlet of the sanding body are completely overlapped, the sanding amount is the largest, which can basically reach 1000 g / min. Use an Allen wrench to loosen the two M6 locking screws that fix the adjustment tube body, and manually rotate the adjustment tube body. When the second sand inlet of the adjustment tube body and the first sand inlet of the sanding body are completely offset, the second sand inlet of the adjustment tube body is blocked by the sanding body, and the sanding amount is the least, which is basically zero.

[0030] In order to facilitate the understanding of the present invention, the following description is given in conjunction with the accompanying drawings during specific use;

[0031] The sand-spreading body is made of stainless steel, and a Φ4 air path is processed on the sand-spreading body to transport the compressed air on the vehicle to the air cavity a through the Φ4 air path. Two 20×6 long holes are processed on the sand-spreading body as the first sand inlet. When assembled, the lower edges of the sand-spreading cover, the first sand inlet, and the second sand inlet are flush. In the absence of compressed air supply, no sand will be automatically discharged even if the train is running; there is a Φ2.3 throttle hole on the air outlet nozzle. The compressed air transported to the air cavity a through the Φ4 air path forms a high-pressure area, which is sprayed into the inner cavity of the sand-spreading body through the Φ2.3 throttle hole to form a siphon effect, so that The sand and gravel are sucked into the adjusting tube body through the first sand inlet and the second sand inlet, and the sand and gravel are discharged from the sand spreading joint at the bottom of the adjusting tube body along with the compressed air. After the pressure differential sand spreader is assembled, a sand spreading amount test is carried out in the factory. The sand spreading amount is adjusted by manually rotating the position of the adjusting tube body. When the sand spreading amount meets the customer's requirements, the two locking screws under the adjusting tube body are tightened, and anti-loosening marks are applied to protect this position from loosening. Through the above process, the position adjustment of the adjusting tube body is ensured by the mechanical adjustment method of manual rotation, thereby controlling the opening size of the second sand inlet relative to the first sand inlet, thereby realizing the control of the amount of sand spreading.

[0032] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pressure differential sand spreader with adjustable sand spreading amount for low-floor trams, characterized by: The invention comprises a mounting plate (3) for connecting with a sand box (1), a sand spreading body (5) fixedly connected to the bottom of the mounting plate (3), and a sand spreading cover (6) connected to the upper end of the sand spreading body (5); an inner cavity (51) and an air path (52) are formed on the sand spreading body (5); the air path (52) is connected to the inner cavity (51) through an air vent (53) at the upper end of the sand spreading body (5); a rotatable adjustment tube (10) is arranged in the inner cavity (51); a first sand inlet (54) is formed on the sand spreading body (5); a second sand inlet (101) is formed on the adjustment tube (10); the first sand inlet (54) and the second sand inlet (101) are at corresponding heights; the adjustment tube (10) is manually rotated to stagger the relative positions of the first sand inlet (54) and the second sand inlet (101) to different degrees, so as to adjust the amount of sand spreading.

2. The pressure differential sand spreader with adjustable sand spreading amount for low-floor trams according to claim 1, characterized in that: A sealing gasket 1 (2) is arranged between the mounting plate (3) and the sand box (1), and a sealing gasket 2 (4) is arranged between the mounting plate (3) and the sand spreading body (5).

3. The pressure differential sand spreader with adjustable sand spreading amount for low-floor trams according to claim 1, characterized in that: The sand-spreading cover (6) is connected to the sand-spreading body (5) via a threaded connection. A sealing gasket (3) is arranged in the sand-spreading body (5). Due to the sealing effect of the sealing gasket (3) (7), an air cavity (a) is formed between the sand-spreading cover (6) and the sand-spreading body (5).

4. The pressure differential sand spreader with adjustable sand spreading amount for low-floor trams according to claim 3, characterized in that: The top end of the sand spreading cover (6) is in a cone shape.

5. A pressure differential sand spreader with adjustable sand spreading amount for low-floor trams according to claim 3 or 4, characterized in that: An air outlet nozzle (9) is provided at the vent hole (53), and a throttling hole (91) is formed at the lower portion of the air outlet nozzle (9).

6. The pressure differential sand spreader with adjustable sand spreading amount for low-floor trams according to claim 5, characterized in that: The air outlet nozzle (9) is screwed onto the vent hole (53) via a thread and is sealed by a sealing gasket four (8).

7. The pressure differential sand spreader with adjustable sand spreading amount for low-floor trams according to claim 1, characterized in that: The first sand inlet (54), the second sand inlet (101), and the lower edges of the sand spreading cover (6) are flush with each other.

8. The pressure differential sand spreader with adjustable sand spreading amount for low-floor trams according to claim 1, characterized in that: The lower part of the adjustment tube body (10) has an integrated connection disk (102), and an arc track (1021) is formed on the disk surface of the connection disk (102). A locking screw (13) is screwed onto the lower part of the sand spreading body (5), and the locking screw (13) is also located in the arc track (1021).

9. The pressure differential sand spreader with adjustable sand spreading amount for low-floor trams according to claim 8, characterized in that: There are two arc-shaped tracks (1021), and correspondingly, there are also two locking screws (13).

10. The pressure differential sand spreader with adjustable sand spreading amount for low-floor trams according to claim 1, characterized in that: The outer end of the gas path (52) is connected to an air inlet joint (11), and the lower end of the adjustment tube body (10) is connected to a sand spreading joint (12).

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