Air supply dryer for locomotive precision device

Abstract

The utility model discloses a locomotive precision device air supply dryer which comprises a cylinder body and a molecular sieve arranged in the cylinder body, an air inlet is formed in the lower portion of the cylinder body, an air outlet is formed in the upper portion of the cylinder body, a primary filtering device is arranged below the molecular sieve in the cylinder body, and air needing to be filtered is filtered through the primary filtering device and then filtered through the molecular sieve. And then the air is discharged from the air outlet. The primary filtering device comprises a flexible metal filter screen filled in an air inlet area in the cylinder body, and further comprises an air inlet pipe extending into the metal filter screen, an air inlet filter cylinder, a cup-shaped water receiver detachably arranged at the bottom of the cylinder body, and a lower filter screen section arranged between a molecular sieve and the metal filter screen and used for vertically guiding air; and the periphery of the lower filter screen section is encircled and restrained by a metal buckle belt. The drying device has the advantages that by arranging the primary filtering device, pollutants with the volume ratio being 50-80% can be filtered out, and the labor cost and the material cost for maintenance (replacement of a molecular sieve) of the drying device are remarkably reduced; and the structure is simple and reasonable without increasing the equipment volume.

Description

Technical Field

[0001] The utility model relates to a dryer, in particular to an air supply dryer for locomotive precision devices. Background Art

[0002] A type of precision device in a locomotive requires relatively clean air when it is blown, inflated, or ventilated for cooling. The industry filters the outside air through a molecular sieve in a dryer, removes the moisture and dust it contains, and then fills the air into the main air cylinder for standby use.

[0003] The molecular sieve of the existing dryer is a particle sieve, which is composed of particles that can absorb dust and moisture filled in the cylinder. When used, air enters one end of the cylinder under pressure and is filled into the main air cylinder after passing through the molecular sieve. Its disadvantage is that the molecular sieve is easy to adhere to a large amount of pollutants in a very short service life and must be replaced in time, resulting in high maintenance costs. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to prolong the effective service life of the molecular sieve and reduce the maintenance cost of the dryer.

[0005] In view of the above problems, the technical solution proposed by the utility model is:

[0006] The locomotive precision device air supply dryer includes a cylinder and a molecular sieve arranged in the cylinder, an air inlet is arranged at the lower part of the cylinder, an air outlet is arranged at the upper part of the cylinder, and a primary filtering device is arranged below the molecular sieve in the cylinder. The air to be filtered is first filtered by the primary filtering device and then filtered by the molecular sieve, and then discharged from the air outlet.

[0007] The primary filtering device comprises a flexible metal filter screen filled in the air inlet area of ​​the cylinder and used for filtering condensed droplets and large-diameter dust in the air.

[0008] The primary filtering device also includes an air inlet pipe extending into the metal filter screen.

[0009] The inner end of the air inlet pipe is bent downward so that the inner end port thereof faces downward.

[0010] The primary filtering device also includes an air intake filter cartridge, the upper end of which is connected to the inner end port of the air intake pipe, and the lower end port of the air intake filter cartridge faces downward. The entire air intake filter cartridge is wrapped in a metal filter mesh, and its axis is in the same straight line as the axis of the cylinder.

[0011] The primary filtering device also includes a cup-shaped water receiver detachably arranged at the bottom of the cylinder, the cup mouth of which is located in the cylinder, and the bottom of the cup has a guide tube leading to the outside of the cylinder, the lower end port of the air intake filter cartridge extends into the cup mouth of the cup-shaped water receiver, and the guide tube is provided with a one-way valve mechanism that can only flow out but not take in air.

[0012] The primary filtering device further includes a lower filter screen section for vertically guiding gas disposed between the molecular sieve and the metal filter screen, and the outer periphery of the lower filter screen section is surrounded and constrained by a metal buckle belt.

[0013] A lid that can be opened is provided at the top of the cylinder body, and the molecular sieve and the metal filter screen can be taken out from the upper port of the cylinder body. Beneficial effects

[0014] 1. By setting the primary filtering device, pollutants with a volume ratio of 50 - 80% can be filtered out, significantly reducing the labor cost and material cost for dryer maintenance;

[0015] 2. The structure is simple and reasonable, and there is no need to increase the equipment volume. Description of the drawings

[0016] Figure 1 is a sectional view of the dryer;

[0017] Figure 2 is Figure 1 a partial schematic view.

[0018] In the figure: 1. Cylinder body; 101. Air inlet; 102. Air outlet; 2. Molecular sieve; 3. Primary filtering device; 301. Metal filter screen; 302. Air inlet pipe; 303. Air inlet filter cartridge; 304. Cup-shaped water receiver; 3041. Diversion pipe; 305. Lower filter screen section; 3051. Metal buckle belt; 4. Lid. Specific implementation manners

[0019] The following further describes the present utility model in conjunction with the drawings:

[0020] As Figure 1 , 2 shown, the air supply dryer for locomotive precision components includes a cylinder body 1 and a molecular sieve 2 disposed inside the cylinder body 1. An air inlet 101 is provided at the lower part of the cylinder body 1, an air outlet 102 is provided at the upper part of the cylinder body 1, and a primary filtering device 3 is provided below the molecular sieve 2 inside the cylinder body 1. The air to be filtered first passes through the primary filtering device 3 and then through the molecular sieve 2, and then is discharged from the air outlet 102. The primary filtering device 3 filters out large-diameter liquid droplets and dust in the air. The volume of these large-diameter liquid droplets and dust accounts for 50 - 80% of the total amount of air pollutants, which can avoid their adhesion to the molecular sieve 2, greatly reduce the degree of pollution of the molecular sieve 2, significantly extend the effective service time of the adsorption particles in the molecular sieve 2, and thus reduce the labor cost and material cost for dryer maintenance.

[0021] The primary filtering device 3 comprises a flexible metal filter 301 filled in the air inlet 101 area of ​​the cylinder 1 for filtering condensed droplets and large-diameter dust in the air. Preferably, the metal filter 301 is a stainless steel filter.

[0022] Furthermore, the primary filtering device 3 further comprises an air inlet pipe 302 extending into the metal filter 301. In this way, the air entering through the air inlet pipe 302 can be evenly dispersed to the surrounding metal filter.

[0023] Furthermore, the inner end of the air inlet pipe 302 is bent downward so that the inner end port is downward, so that the dirty liquid adsorbed by the metal filter can drip into the air inlet pipe 302 .

[0024] Furthermore, the primary filtering device 3 also includes an air intake filter cartridge 303, the upper end of which is butted against the inner end port of the air intake pipe 302, the lower end port of which faces downward, and the entire air intake filter cartridge 303 is wrapped in the metal filter 301, and its axis is aligned with the axis of the cylinder 1. In this way, before entering the metal filter, droplets and dust with larger particle sizes in the air can be blocked by the air intake filter cartridge 303, which greatly reduces the degree of contamination of the metal filter 301 per unit time and significantly prolongs the normal use time of the metal filter 301.

[0025] The primary filtering device 3 also includes a cup-shaped water receiver 304 detachably arranged at the bottom of the cylinder 1, the mouth of which is located inside the cylinder 1, and the bottom of the cup has a flow guide pipe 3041 leading to the outside of the cylinder, the lower end of the air inlet filter cartridge 303 extends into the mouth of the cup-shaped water receiver 304, and the flow guide pipe 3041 is provided with a one-way valve mechanism that can only flow out but not in. In this way, the polluted liquid adsorbed and intercepted by the metal filter 301 and the air inlet filter cartridge 303 can be received and directly guided out.

[0026] The primary filtering device 3 also includes a lower filter section 305 for vertically guiding gas, which is arranged between the molecular sieve 2 and the metal filter 301. The outer periphery of the lower filter section 305 is surrounded and constrained by a metal buckle 3051. This is actually a transition filter body between the metal filter 301 and the molecular sieve 2, and its filtration particle size can be smaller than that of the metal filter 301, thereby further expanding the particle size range of the primary filtration and obtaining a better filtration effect.

[0027] An openable cover 4 is provided on the top of the cylinder 1, so that the molecular sieve 2 and the metal filter 301 can be taken out from the upper port of the cylinder 1, so as to facilitate the cleaning or replacement of the above-mentioned filter elements.

[0028] The above embodiments are only used to more clearly describe the present invention and cannot be regarded as limiting the protection scope of the present invention. Any modifications in equivalent forms should be regarded as falling within the protection scope of the present invention.

Claims

1. A locomotive precision device air supply dryer, comprising a cylinder (1) and a molecular sieve (2) disposed in the cylinder (1), an air inlet (101) being disposed at the lower portion of the cylinder (1), and an air outlet (102) being disposed at the upper portion of the cylinder (1), wherein: A primary filtering device (3) is provided below the molecular sieve (2) in the cylinder (1); air to be filtered is first filtered by the primary filtering device (3) and then filtered by the molecular sieve (2), and then discharged from the air outlet (102).

2. The locomotive precision device air supply dryer according to claim 1, characterized in that: The primary filtering device (3) comprises a flexible metal filter screen (301) filled in the air inlet (101) region of the cylinder (1) and used for filtering condensed droplets and large-diameter dust in the air.

3. The locomotive precision device air supply dryer according to claim 2, characterized in that: The primary filtering device (3) further comprises an air inlet pipe (302) extending into the metal filtering screen (301).

4. The locomotive precision device air supply dryer according to claim 3, characterized in that: The inner end of the air inlet pipe (302) is bent downward so that its inner end port faces downward.

5. The locomotive precision device air supply dryer according to claim 4, characterized in that: The primary filtering device (3) further comprises an air intake filter cartridge (303), the upper end of the air intake filter cartridge (303) being butted against an inner end port of the air intake pipe (302), the lower end port of the air intake filter cartridge (303) facing downward, the entire air intake filter cartridge (303) being wrapped in a metal filter mesh (301), and the axis of the air intake filter cartridge (303) being colinear with the axis of the cylinder body (1).

6. The locomotive precision device air supply dryer according to claim 5, characterized in that: The primary filtering device (3) further comprises a cup-shaped water receiver (304) detachably arranged at the bottom of the cylinder (1), the mouth of which is located inside the cylinder (1), and the bottom of which is provided with a flow guide tube (3041) leading to the outside of the cylinder, the lower end port of the air intake filter cartridge (303) extends into the mouth of the cup-shaped water receiver (304), and the flow guide tube (3041) is provided with a one-way valve mechanism that can only allow outflow but not intake.

7. The locomotive precision device air supply dryer according to claim 1, characterized in that: The primary filtering device (3) further comprises a lower filter screen segment (305) disposed between the molecular sieve (2) and the metal filter screen (301) for vertically guiding gas, the outer periphery of the lower filter screen segment (305) being surrounded and constrained by a metal buckle belt (3051).

8. The locomotive precision device air supply dryer according to claim 2, characterized in that: An openable cover (4) is provided on the top of the cylinder (1), and the molecular sieve (2) and the metal filter (301) can be taken out from the upper port of the cylinder (1).

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