CN214578935U - Drain valve for air brake system - Google Patents

Abstract

The utility model relates to a drain valve for a pneumatic braking system, which comprises a lower valve body and an upper valve body fixed on the lower valve body, the upper valve body and the lower valve body are internally provided with a valve core which can move up and down, a drainage structure is arranged in the valve core, a water inlet hole corresponding to the drainage structure is arranged on the side surface of the upper valve body, a filter screen is fixed outside the water inlet hole, the bottom of the lower valve body is provided with a drain hole corresponding to the drain structure, one end of the valve core is connected with the elastic element to control the valve core to move up and down, the other end of the valve core passes through the heating device in the lower valve body, a filter screen is fixed at the drain hole of the upper valve body, impurities in the air storage cylinder are blocked outside the filter screen, the drain hole is prevented from being blocked by the impurities, an annular heating sheet is fixed at the bottom in the lower valve body, the annular heating sheet surrounds the valve core for a circle, heating is uniform, accumulated water is effectively prevented from freezing when the temperature is low, and the service environment of the drain valve is expanded.

Description

Drain valve for air brake system

Technical Field

The utility model relates to a gas storage device technical field, especially a drain valve for air brake system.

Background

The air contains certain water vapor, and when the air is compressed, the water vapor can be converted into liquid water to be separated out. Therefore, in the automobile air brake system, moisture can be separated out after air is compressed and is reserved in an air storage cylinder of the air brake system, if the reserved moisture cannot be discharged in time, accumulated water easily corrodes a pipeline, and the pipeline can be blocked due to icing in winter or under the condition of low temperature, so that great potential safety hazards are brought to the running of vehicles. Therefore, the residual moisture in the air storage cylinder in the automobile air brake system must be discharged in time. The water discharge valve for the automobile air brake system is mainly used for discharging accumulated water in the air storage cylinder, the conventional water discharge valve is lack of a filter screen at the position of a water discharge hole, sundries are easy to block the water discharge hole, the water discharge is not smooth, a heating device is also lack, and when the temperature is lower in winter, the accumulated water at the position of the water discharge hole is easy to freeze to block the water discharge hole.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a drain valve for air braking system with filter screen and heating function solves the not enough of current drain valve lack heating device and wash port filter screen.

The technical scheme of the utility model specifically does:

a drain valve for an air brake system comprises a lower valve body and an upper valve body fixed on the lower valve body, wherein valve cores capable of moving up and down are arranged in the upper valve body and the lower valve body, a drainage structure is arranged in each valve core, a water inlet corresponding to the drainage structure is formed in the side face of the upper valve body, a filter screen is fixed outside each water inlet, a drain hole corresponding to the drainage structure is formed in the bottom of the lower valve body, one end of each valve core is connected with an elastic element to control the up-and-down movement of each valve core, and the other end of each valve core penetrates through a heating device in the lower valve body.

The valve core is of a hollow structure with two closed ends, the drainage structure comprises a valve core water inlet hole located in the middle of the valve core and a valve core water outlet hole located at the lower part of the valve core, and the valve core water inlet hole and the valve core water outlet hole are communicated with the hollow structure inside the valve core.

And a limiting nut is fixed at a position above the valve core in the upper valve body.

The heating device comprises an annular heating sheet, a waterproof joint hole is formed in the side face of the lower valve body, a wiring of the heating sheet penetrates out of the waterproof joint hole, and the waterproof joint hole is sealed through glue filling.

The utility model discloses a drain valve for air brake system, the filter screen is fixed at the upper valve body drain hole, the accumulated water in the air cylinder flows into the drain passage through the upper valve body drain hole after being filtered by the filter screen, the impurities in the air cylinder are blocked outside the filter screen, and the drain hole is prevented from being blocked by the impurities; meanwhile, the annular heating sheets are fixed at the bottom in the lower valve body, surround the valve core for a circle, are heated uniformly, water accumulation is effectively prevented from freezing when the temperature is low, and the service environment of the drain valve is expanded.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a sectional view of the structure of the present invention.

Fig. 3 is a schematic view of the valve cartridge structure.

Fig. 4 is a sectional view of the valve core structure.

Fig. 5 is a schematic view of the structure of the lower valve body.

Fig. 6 is a schematic view of the upper valve body structure.

Fig. 7 is a sectional view of the upper valve body structure.

Wherein 1 is a valve core; 2 is a lower valve body; 3 is a gasket; 4 is a spring; 5 is a valve core big end sealing ring; 6 is a filter screen; 7 is a heating sheet; 8 is an upper valve body; 9 is an upper valve body sealing ring; 10 is a limit nut; 11 is a waterproof joint; 12 is a waterproof joint seal ring; 13 is a plug; 14 is a waterproof joint hole; 15 is a concave hole; 16 is a drain hole; 17 is a water inlet; 18 is a spool via; 19 is a spool ring groove; 20 is a valve core water inlet; 21 is a valve core drain hole; 22 is an upper chamber; and 23 is the lower chamber.

Detailed Description

The utility model discloses do not receive the restriction of following embodiment, can be according to the utility model discloses a technical scheme and actual conditions determine concrete implementation.

As shown in fig. 1-7, fig. 1 is the structural schematic diagram of the present invention, fig. 2 is the sectional view of the structure of the present invention, fig. 3 is the structural schematic diagram of the valve element, fig. 4 is the sectional view of the valve element structure, fig. 5 is the structural schematic diagram of the lower valve body, fig. 6 is the structural schematic diagram of the upper valve body, fig. 7 is the sectional view of the upper valve body, the present invention relates to a drain valve for the pneumatic brake system, which comprises an upper valve body 8, a lower valve body 2, a valve element 1, a spring 4 and a heating plate 7. Go up valve body 8 and be cylindric structure, upper portion is the great last cavity 22 of internal diameter, and the lower part is the less lower cavity 23 of internal diameter, and the upper portion of going up valve body 8 is provided with the internal thread, and the lower part is provided with the external screw thread, and the external screw thread is used for with lower valve body 2 fixed connection, and the internal thread is used for fixing stop nut 10. The lower valve body 2 is of a hexagonal prism structure with a concave hole, an internal thread is arranged on the upper portion of the lower valve body 2 in the inner portion, an external thread is arranged on the outer portion, the internal thread is fixedly connected with the upper valve body 8, and the external thread is used for fixing the drain valve on an air storage cylinder in an automobile air braking system. The valve core 1 is a hollow cylindrical structure with a closed lower end, the cylindrical structure of the valve core 1 is divided into two sections, the diameter of the upper section is larger and is matched with the inner diameter of the upper chamber 22 of the upper valve body 8, and the diameter of the lower section is smaller and is matched with the lower chamber 23 of the upper valve body 8. A plug 13 is fixed at the top opening of the valve core 1, the top opening of the valve core 1 is closed, accumulated water and air are prevented from entering the valve core 1 from the top opening, a valve core water inlet hole 20 is formed in the side face of the middle of the valve core 1, a valve core water drain hole 21 is formed in the side face of the lower portion of the valve core 1, and the valve core water inlet hole 20 and the valve core water drain hole 21 are communicated with the hollow structure of the valve core 1 to form a water drain structure of the valve core 1. The upper valve body 8 is provided with a water inlet 17 corresponding to the valve core water inlet 20, and the outer side of the water inlet 17 is fixed with the filter screen 6 on the upper valve body 8. The bottom of the lower valve body 2 is provided with a drain hole 16, and the drain hole 16 is communicated with the concave hole of the lower valve body 2. The spring 4 is located the upper chamber 22 bottom of upper valve body 8, and case 1 penetrates from the upper end of upper valve body 8, and the lower section that case 1 diameter is less passes spring 4, and the great upper segment of diameter is fixed on spring 4, and then drives case 1 up-and-down motion in upper valve body 8 and lower valve body 2 through the compression and the reset of spring 4. The upper portion of the valve core 1 is located inside the upper valve body 8 and is fixed with a limiting nut 10, the limiting nut 10 is of a circular ring structure, the middle of the limiting nut is of a hollow structure, air in the air storage cylinder can be in direct contact with the upper surface of the valve core 1, therefore, air pressure in the air storage cylinder can act on the valve core 1, and meanwhile the limiting nut 10 limits the maximum position of upward movement of the valve core 1. The lower end of the valve core 1 is positioned in a concave hole of the lower valve body 2, the valve core water discharging hole 21 is communicated with the concave hole of the lower valve body 2, and the bottom of the valve core 1 is fixed with a sealing gasket 3.

The valve core ring groove 19 is formed in the outer diameter of the upper section with the larger diameter of the valve core 1, and the valve core big end sealing ring 5 is sleeved at the valve core ring groove 19 and used for improving the sealing performance of the valve core 1 and the upper valve body 8. The upper valve body 8 and the lower valve body 2 are also sleeved with an upper valve body sealing ring 9 through the positions fixed by threads, so that the sealing degree between the upper valve body 8 and the lower valve body 2 is increased.

The heating plate 7 is in a ring shape, is fixed on a boss in the lower valve body 2, and surrounds the valve core 1 with the lower end positioned in a concave hole of the lower valve body 2, so that 360-degree annular heating is met. Seted up on the side of lower valve body 2 waterproof joint hole 14, waterproof joint hole 14 department is equipped with the internal thread, and waterproof joint 11 is hollow cylinder structure, and one end is equipped with the external screw thread, and the external screw thread of waterproof joint 11 mutually supports with the internal thread in waterproof joint hole 14, fixes waterproof joint 11 and lower valve body 2, and waterproof joint hole 14 department is equipped with waterproof joint sealing washer 12. The connecting line of the heating plate 7 penetrates out through the waterproof joint hole 14 and the waterproof joint 11, and the waterproof joint hole 14 is sealed by glue pouring, so that the waterproof effect is ensured.

When the utility model is assembled, the heating plate 7 is fixed on the boss in the lower valve body 2, the connecting line of the heating plate 7 passes through the waterproof joint hole 14 and penetrates out of the waterproof joint 11, the waterproof joint 11 is screwed to the waterproof joint hole 14 after being sleeved with the waterproof joint sealing ring 12 and is fixedly connected with the lower valve body 2, the waterproof joint hole 14 is sealed by glue filling, then the filter screen 6 is fixed on the upper valve body 8, the spring 4 is fixed at the bottom of the upper chamber 22 of the upper valve body 8, the valve core big end sealing ring 5 is sleeved on the valve core annular groove 19 of the valve core 1, the plug 13 is fixed at the top opening of the valve core 1, the top opening is closed, the valve core 1 is arranged in the upper valve body 8 in a penetrating way, the lower section with smaller diameter of the valve core 1 passes through the spring 4, the upper section is positioned on the spring 4, the limiting nut 10 is fixed above the valve core 1 in the upper valve body 8, and finally the upper valve body sealing ring 9 is sleeved on the external thread of the upper valve body 8, the upper valve body 8 is screwed to the lower valve body 2 to be fixed.

The utility model discloses the during operation: when the pressure applied to the upper surface of the valve core 1 by the gas pressure in the air storage cylinder is smaller than the pressure applied to the valve core 1 by the spring 4, the spring 4 pushes the valve core 1 to move upwards, at the moment, the sealing gasket 3 at the bottom of the valve core 1 leaves the bottom of the concave hole 15 of the lower valve body 2, the drain hole 16 at the bottom of the lower valve body 2 is in an open state, the valve core water inlet hole 20 on the valve core 1 is communicated with the water inlet hole 17 on the upper valve body 8, the accumulated water in the air storage cylinder flows into the water inlet hole 17 after being filtered by the filter screen 6, flows into the valve core water inlet hole 20 from the water inlet hole 17, flows downwards along the hollow structure of the valve core 1, flows out of the valve core drain hole 21 of the valve core 1, flows into the concave hole 15 of the lower valve body 2, flows into the drain hole 16 through the concave hole 15, and finally flows out of the drain hole 16, and the state is a drainage state; when the pressure applied to the surface of the valve core 1 by the gas pressure in the gas storage cylinder is greater than the pressure applied to the valve core 1 by the spring 4, the valve core 1 is pushed to move downwards by the gas in the gas storage cylinder, the sealing gasket 3 at the bottom of the valve core 1 presses the bottom of the concave hole 15 of the lower valve body 2 at the moment, the drain hole 16 at the bottom of the lower valve body 2 is in a closed state, the valve core water inlet hole 20 on the valve core 1 and the water inlet hole 17 on the upper valve body 8 are located at different horizontal positions, are staggered in height and are not communicated, and the closed state is adopted. The valve core 1 continuously moves between a drainage state and a closing state along with the change of the air pressure in the air storage cylinder, and accumulated water in the air storage cylinder is continuously drained. When the external environment is low, the annular heating sheet 7 is used for heating, so that the temperature in the drain valve is increased, accumulated water in the drain valve is prevented from freezing to block the drain hole, and the application environment of the drain valve is enlarged.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.

Claims (4)

1. The utility model provides a drain valve for pneumatic braking system, includes lower valve body and fixes last valve body above that, its characterized in that: the upper valve body and the lower valve body are internally provided with valve cores capable of moving up and down, a drainage structure is arranged in each valve core, a water inlet hole corresponding to the drainage structure is formed in the side face of each upper valve body, a filter screen is fixed outside each water inlet hole, a drainage hole corresponding to the drainage structure is formed in the bottom of each lower valve body, one end of each valve core is connected with an elastic element to control the up-and-down movement of each valve core, and the other end of each valve core penetrates through a heating device in each lower valve body.

2. The drain valve for a pneumatic brake system according to claim 1, wherein: the valve core is of a hollow structure with two closed ends, the drainage structure comprises a valve core water inlet hole located in the middle of the valve core and a valve core water outlet hole located at the lower part of the valve core, and the valve core water inlet hole and the valve core water outlet hole are communicated with the hollow structure inside the valve core.

3. The drain valve for a pneumatic brake system according to claim 1, wherein: and a limiting nut is fixed at a position above the valve core in the upper valve body.

4. The drain valve for a pneumatic brake system according to claim 1, wherein: the heating device comprises an annular heating sheet, a waterproof joint hole is formed in the side face of the lower valve body, a wiring of the heating sheet penetrates out of the waterproof joint hole, and the waterproof joint hole is sealed through glue filling.

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