CN101737304B - Inlet valve of air compressor for railway locomotive - Google Patents
Inlet valve of air compressor for railway locomotive Download PDFInfo
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- CN101737304B CN101737304B CN2010101114139A CN201010111413A CN101737304B CN 101737304 B CN101737304 B CN 101737304B CN 2010101114139 A CN2010101114139 A CN 2010101114139A CN 201010111413 A CN201010111413 A CN 201010111413A CN 101737304 B CN101737304 B CN 101737304B
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- valve
- seat
- piston
- spring
- spring seat
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Abstract
The invention discloses an inlet valve of an air compressor for a railway locomotive, which structurally comprises a valve body and a valve seat; the valve body is provided with an air inlet and a valve plate; the valve seat is provided with an air outlet; a cavity of the valve seat is provided with a piston inside; the cavity under the piston is communicated with a drain pipe through fluid; the top of the cavity of the valve seat is provided with a first spring seat; an offsetting spring is arranged between the piston and the first spring seat; and the improvement lies in that: a second spring seat and a check ring are arranged under the valve body; an air inlet spring is clamped between the valve plate and the check ring; the second spring seat and the first spring seat are provided with central holes in which a valve rod of the valve plate is inserted; and the lower end face of the valve rod is opposite to the upper end face of a piston rod of the piston. The valve plate at the air inlet can ensure timely and effective closing, so that problems of freezing, emulsification and the like due to stoppage under severe climate conditions cannot occur, and the using requirement of rail transportation, particularly the railway locomotive is fully met.
Description
Technical field
The present invention relates to the air inlet technology of air compressor, specifically a kind of inlet valve of air compressor for railway locomotive.
Background technique
Compressor is the machine that air pressure is shortened into pressurized gas, at suction valve of air inlet section needs of machine, opens air inlet pipeline when the purpose of this suction valve is compressor operating, closes air inlet pipeline during shutdown.
For rail traffic vehicles, the air compressor that especially uses on the railway locomotive, the locomotive place of arrival, the various places weather is different, and its working environment has very big variation, may arrive temperature utmost point low country or the high area of humidity of the air such as railway locomotive.For the extremely low weather conditions of temperature, in the time period of after air compressor is made wind to train, shutting down, air compressor may freeze; For the weather conditions of high humidity in summer, the low temperature that compressor shutdown caused possibly make airborne moisture in compressor, condense and cause lubricating oil emulsion, thereby the accident that possibly cause compressor to be burnt takes place.Solution for the problems referred to above; Be under above-mentioned extreme weather conditions, under the situation of the machine that do not have a power failure, the oil gas tube pressure of keeping compressor is to avoid shutting down problems such as freezing of possibly causing; At this moment, suction valve suction port place valve plate is instant, effectively closure is necessary condition.
The structure of suction valve of the prior art generally comprises valve body and valve seat, on valve body, has suction port and valve plate is installed, and on valve seat, has the air outlet, in the valve seat cavity, piston is installed, the cavity and the bleeder pipe fluid communication of piston below.Top at the valve seat cavity is provided with spring seat, and card has Returnning spring between piston and the spring seat, in piston rod, has cavity, and the valve rod of valve plate wears check spring and penetrates downwards in this cavity.Adopt the suction valve of this structure, its valve plate closure is under the rebounding force effect of the check spring of pressurized, on be about to air inlet closure.Its shortcoming is that then air inlet closure is better if spring force is bigger, but the consequence of bringing is that the suction port resistance of air is bigger.If spring force is less, though then the suction port resistance of air is smaller,, can instant, effective closure of valve plate be impacted.And, in case this check spring lost efficacy, then can make the suction port valve plate can not be effectively closed when needed.
Summary of the invention
The object of the invention be exactly to provide a kind of suction port valve plate can be immediately, effectively closed inlet valve of air compressor for railway locomotive, with satisfy track traffic especially on the railway locomotive to the user demand of air compressor.
The present invention is achieved in that this inlet valve of air compressor for railway locomotive; Comprise valve body and valve seat, on valve body, have suction port and valve plate is installed, on valve seat, have the air outlet; In the valve seat cavity, piston is installed; The cavity and the bleeder pipe fluid communication of piston below are provided with first spring seat at the top of valve seat cavity, between piston and said first spring seat Returnning spring are housed; Its improvements are to be provided with second spring seat and back-up ring in valve body lower portion, between valve plate and back-up ring, are installed with the air inlet spring; On second spring seat and first spring seat, have center hole, the valve rod of cross-under valve plate in the said center hole, the piston rod upper-end surface of this valve rod lower end surface and piston is relative.
The present invention is provided with second spring seat in valve body lower portion; Between the valve plate and second spring seat, be installed with the air inlet spring; In the compressor normal working, when pressure rose to rated pressure, the inside and outside differential pressure of suction port reduced; Valve plate moves upward under the elastic force of air inlet spring promotes, and it is closed that suction port is tending towards; Meanwhile, compressor oil inflator inner high voltage gas is emitted and is promoted piston through bleeder pipe and moves upward, because the piston rod upper-end surface of valve rod lower end surface and piston is relative, therefore, the piston that moves upward is the valve plate jack-up that makes progress, and makes it with the effective closure of suction port.Thus; When air compressor pressure rises to rated pressure, even the air inlet spring force is less, under the acting in conjunction of air inlet spring and piston rod; Valve plate still can be instant with suction port in the very first time, effectively closed; Thereby effectively solve the suction port valve plate effectively closed with circulation status under the contradiction that exists between excessive of resistance of air, when also having solved the air inlet spring failure on the other hand, the problem that valve plate can't closure.Make this air compressor can definitely guarantee under adverse weather condition, can not occur to shut down thus and then the appearance of problem such as freezing of causing, emulsification, satisfy the especially user demand of railway locomotive of track traffic.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Shown in Figure 1, this inlet valve of air compressor for railway locomotive comprises valve body 8 and valve seat 1; On valve body 8, have suction port and valve plate 7 is installed; On valve seat 1, have the air outlet, piston 3 is installed in the valve seat cavity, the cavity and bleeder pipe 2 fluid communication of piston below; Be provided with first spring seat 4 at the top of valve seat 1 cavity; Between piston 3 and said first spring seat 4 Returnning spring 9 is housed, is provided with second spring seat 6 and back-up ring 5, between valve plate 7 and back-up ring 5, be installed with air inlet spring 10 in valve body lower portion.On second spring seat 6 and first spring seat 4, have center hole, the valve rod of cross-under valve plate 1 in the said center hole, the piston rod upper-end surface of this valve rod lower end surface and piston 3 is relative.
Among Fig. 1, solenoid valve 11 is a normally open solenoid valve, when the unit proper functioning, solenoid valve 11; Valve closes, at this moment, suction valve valve plate 7 is an opening state, when pressure rises to rated pressure; Reduce problem, the action of air reservoir pressure switch, solenoid valve 11 dead electricity, valve open for avoiding air compressor to shut down appearance temperature; The oil gas cylinder pressure is high, gas under pressure, a part from the thin base of oil through solenoid valve 11 to bleeder pipe 2 in suction valve valve seat cavity, the suction valve valve plate is closed.Another part is divided into two-way again; One the tunnel is off-load usefulness, and another road sets up one-way valve 12 to communicate with valve body, participates in the internal gas circulation and sets up oil pressure; If simultaneously oil pressure is not enough then mend into small amount of fresh air from the unloading hole of suction valve, the oil gas cylinder pressure is maintained under the normal oil pressure state.When the air reservoir internal pressure drops to certain value, the action of air reservoir pressure switch, solenoid valve gets electric, valve closes, the suction valve valve plate is opened, and compressor is in running order.
Claims (1)
1. inlet valve of air compressor for railway locomotive; Comprise valve body (8) and valve seat (1), on valve body (8), have suction port and valve plate (7) is installed, on valve seat (1), have the air outlet; Piston (3) is installed in the valve seat cavity; The cavity and bleeder pipe (2) fluid communication of piston below are provided with first spring seat (4) at the top of valve seat (1) cavity, between piston (3) and said first spring seat (4) Returnning spring (9) are housed; It is characterized in that being provided with second spring seat (6) and back-up ring (5), between valve plate (7) and back-up ring (5), be installed with air inlet spring (10) in valve body lower portion; On second spring seat (6) and first spring seat (4), have center hole, the valve rod of cross-under valve plate (7) in the said center hole, the piston rod upper-end surface of this valve rod lower end surface and piston (3) is relative.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101114139A CN101737304B (en) | 2010-02-11 | 2010-02-11 | Inlet valve of air compressor for railway locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101114139A CN101737304B (en) | 2010-02-11 | 2010-02-11 | Inlet valve of air compressor for railway locomotive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101737304A CN101737304A (en) | 2010-06-16 |
| CN101737304B true CN101737304B (en) | 2012-01-11 |
Family
ID=42461215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101114139A Active CN101737304B (en) | 2010-02-11 | 2010-02-11 | Inlet valve of air compressor for railway locomotive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101737304B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705202B (en) * | 2012-07-04 | 2015-07-15 | 石家庄嘉祥精密机械有限公司 | Non-return intake valve of air compressor for track traffic |
| CN102889198B (en) * | 2012-11-07 | 2016-01-20 | 石家庄嘉祥精密机械有限公司 | Inlet valve of air compressor for railway locomotive |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001323881A (en) * | 2000-05-16 | 2001-11-22 | Hitachi Ltd | Compressor |
| CN2871924Y (en) * | 2006-03-10 | 2007-02-21 | 无锡五洋赛德压缩机有限公司 | Charging-controlled combined valve |
| CN201013559Y (en) * | 2007-03-19 | 2008-01-30 | 上海斯可络压缩机有限公司 | Air-intake lifting valve |
| CN101265911A (en) * | 2008-04-28 | 2008-09-17 | 无锡五洋赛德压缩机有限公司 | Natural gas compressor |
| CN201606224U (en) * | 2010-02-11 | 2010-10-13 | 石家庄嘉祥精密机械有限公司 | Air compressor air intake valve for railway locomotives |
-
2010
- 2010-02-11 CN CN2010101114139A patent/CN101737304B/en active Active
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| Publication number | Publication date |
|---|---|
| CN101737304A (en) | 2010-06-16 |
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