Drain valve for locomotive air dryer

Abstract

The drain valve for the locomotive air dryer comprises a shell, an inlet is formed in the top of the shell, a first air hole and a second air hole are formed in the bottoms of the left side and the right side of the shell respectively, and a valve element is connected to the inner wall of the shell in a sliding mode. The first air hole and the second air hole are used for inflating the interior of the shell to control the valve element to move left and right to adjust the position, an annular groove is formed in the outer wall of the valve element, and a first outlet and a second outlet are formed in the outer wall of the bottom end of the shell. The valve core controls on-off of the second outlet and the first outlet, so that water vapor can be firstly released into the water collecting cavity when the water vapor is discharged from the main air reservoir of the locomotive air dryer, the main air reservoir of the locomotive air dryer is prevented from greatly relieving pressure, and the use stability of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of locomotive air dryers, and specifically relates to a drain valve for a locomotive air dryer. Background Technique

[0002] Locomotive air dryers usually adopt the adsorption drying principle. Adsorbents such as molecular sieves or silica gels are installed inside. When compressed air passes through the dryer, the adsorbent adsorbs moisture and impurities in the air, drying and purifying the air. When discharging the pressurized water vapor in the main air reservoir of the locomotive air dryer, it is easy to cause pressure relief inside the main air reservoir of the locomotive air dryer, which is not conducive to maintaining the stability of the locomotive air dryer's operation and improving the energy-saving effect. Content of the Utility Model

[0003] The purpose of the utility model is to provide a drain valve for a locomotive air dryer to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A drain valve for a locomotive air dryer includes a housing. An inlet is opened at the top of the housing. First air holes and second air holes are respectively opened at the bottom of the left and right sides of the housing. A valve core is slidably connected to the inner wall of the housing. The first air hole and the second air hole are used to inflate the inside of the housing to control the left and right movement of the valve core to adjust the position. An annular groove is opened on the outer wall of the valve core. First outlets and second outlets are opened on the outer wall at the bottom end of the housing.

[0006] In a preferred embodiment of the utility model, end covers are detachably and sealably connected to the outer walls of the left and right sides of the housing through bolts. The first air hole and the second air hole are symmetrically distributed and arranged in an L-shaped structure.

[0007] In a preferred embodiment of the utility model, both the left and right ends of the valve core are set to be conical. The input end of the inlet is connected to the main air reservoir. Pressurized water vapor is input into the inlet. The output end at the bottom of the first outlet is connected to a water collection cavity.

[0008] In a preferred embodiment of the utility model, the length of the annular groove is greater than the distance between the first outlet and the second outlet. The first outlet and the second outlet are communicated through the annular groove.

[0009] Additional aspects and advantages of the utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the utility model.

[0010] By setting a valve core that can be adjusted to move left and right to control the on / off of the second outlet and the first outlet, when discharging water vapor from the main air cylinder of the locomotive air dryer, the water vapor can be first released into the water collection cavity, avoiding a large amount of pressure relief in the main air cylinder of the locomotive air dryer and improving the stability of equipment use. Brief Description of the Drawings

[0011] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0012] Figure 1 It is a front view structural schematic diagram of a drain valve for a locomotive air dryer;

[0013] Figure 2 It is a side view structural schematic diagram of a drain valve for a locomotive air dryer;

[0014] Figure 3 It is a first sectional view structural schematic diagram of a drain valve for a locomotive air dryer;

[0015] Figure 4 It is a second sectional view structural schematic diagram of a drain valve for a locomotive air dryer.

[0016] In the figure: housing 100, bolt 110, end cover plate 120, inlet 130, first air hole 140, second air hole 150, second outlet 160, first outlet 170, valve core 200, annular groove 210, water collection cavity 300. Detailed Description of the Embodiments

[0017] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0018] Embodiment 1: As Figures 1-4 , it includes a housing 100. An inlet 130 is provided at the top of the housing 100. First air holes 140 and second air holes 150 are respectively provided at the bottom on the left and right sides of the housing 100. A valve core 200 is slidably connected to the inner wall of the housing 100. The first air holes 140 and the second air holes 150 are used to inflate the inside of the housing 100 to control the valve core 200 to move left and right to adjust the position. An annular groove 210 is provided on the outer wall of the valve core 200. A first outlet 170 and a second outlet 160 are provided on the outer wall at the bottom end of the body 100.

[0019] The specific usage scenario of this embodiment is as follows: By providing the first air hole 140 and the second air hole 150 for docking with the pneumatic control device, and respectively supplying airflows to the first air hole 140 and the second air hole 150, the airflows are used to push the valve core 200 to move left and right. The valve core 200 is provided for controlling the on-off of the second outlet 160 and the first outlet 170.

[0020] Embodiment 2: As Figures 1-3 , both the left and right outer walls of the housing 100 are detachably and hermetically connected to the end cover plates 120 through bolts 110. The first air hole 140 and the second air hole 150 are symmetrically distributed with an L-shaped structure. Both the left and right ends of the valve core 200 are provided as cones. The input end of the inlet 130 is connected to the main air cylinder. Moisture with pressure is input into the inlet 130. The bottom output end of the first outlet 170 is connected to a water collecting cavity 200.

[0021] The specific usage scenario of this embodiment is as follows: By providing both the left and right ends of the valve core 200 as cones, it is easy to leave a certain cavity when the valve core 200 fits against the inner wall of the end cover plate 120, facilitating the entry of airflows into the cavity inside the housing 100 for inflation, thereby pushing the valve core 200 to move.

[0022] Embodiment 3: As Figure 3 and Figure 4 , the length of the annular groove 210 is greater than the distance between the first outlet 170 and the second outlet 160. The first outlet 170 and the second outlet 160 are connected through the annular groove 210.

[0023] The specific usage scenario of this embodiment is as follows: By connecting the first outlet 170 and the second outlet 160 through the annular groove 210, it is convenient for the moisture in the water collecting cavity 300 to flow back to the first outlet 170 and then be discharged through the second outlet 160, so that the main air cylinder in the locomotive air dryer will not be depressurized when discharging moisture, improving the pressure maintaining effect on the main air cylinder in the locomotive air dryer.

[0024] The working principle of the present utility model is as follows: Those skilled in the art pass air flow into the second air hole 150, so that the air flow enters the cavity inside the housing 100 and pushes the valve core 200 to move towards the first air hole 140 side, making the annular groove 210 communicate with the inlet 130 and the first outlet 170. The water vapor mixture with pressure in the main air reservoir (not marked in the figure) of the locomotive air dryer is transported into the inlet 130, and then the water vapor is transported to the first outlet 170 through the annular groove 210. Subsequently, it is transported to the water collection cavity 300 through the first outlet 170. After the water vapor in the water collection cavity 300 reaches the preset content, the passage between the main air reservoir and the inlet 130 is closed. Subsequently, air flow is transported into the cavity inside the housing 100 through the first air hole 140, so that the air flow pushes the valve core 200 to move towards the second air hole 150 side, making the annular groove 210 connect the second outlet 160 and the first outlet 170. Subsequently, the water collection cavity 300 is refluxed to the first outlet 170, and then enters the second outlet 160 through the annular groove 210. The water vapor mixture is discharged through the second outlet 160, and then the above work is repeated to drain the main air reservoir in the locomotive air dryer.

[0025] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A drain valve for a locomotive air dryer, comprising a housing (100), an inlet (130) is provided at the top of the housing (100), first air holes (140) and second air holes (150) are respectively provided at the bottom of the left and right sides of the housing (100), a valve core (200) is slidably connected to the inner wall of the housing (100), characterized in that, The first air hole (140) and the second air hole (150) are used to inflate the interior of the housing (100) to control the left and right movement of the valve core (200) for position adjustment. An annular groove (210) is provided on the outer wall of the valve core (200), and a first outlet (170) and a second outlet (160) are provided on the outer wall of the bottom end of the housing (100).

2. The drain valve for a locomotive air dryer according to claim 1, characterized in that, Both the left and right outer walls of the housing (100) are detachably and sealably connected to the end cover plate (120) by bolts. The first air hole (140) and the second air hole (150) are symmetrically distributed and provided with an L-shaped structure.

3. The drain valve for a locomotive air dryer according to claim 1, characterized in that, Both the left and right ends of the valve core (200) are provided in a conical shape. The input end of the inlet (130) is connected to the main air cylinder, and water vapor with pressure is input into the inlet (130). The bottom output end of the first outlet (170) is connected to a water collecting chamber (300).

4. The drain valve for a locomotive air dryer according to claim 1, characterized in that, The length of the annular groove (210) is greater than the distance between the first outlet (170) and the second outlet (160). The first outlet (170) and the second outlet (160) are communicated through the annular groove (210).

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