CN105857287A - Pressure limiting mechanism for railway brake valve - Google Patents
Pressure limiting mechanism for railway brake valve Download PDFInfo
- Publication number
- CN105857287A CN105857287A CN201610372799.6A CN201610372799A CN105857287A CN 105857287 A CN105857287 A CN 105857287A CN 201610372799 A CN201610372799 A CN 201610372799A CN 105857287 A CN105857287 A CN 105857287A
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- CN
- China
- Prior art keywords
- valve
- piston
- valve body
- limiting mechanism
- port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/021—Railway control or brake valves
Abstract
The invention discloses a pressure limiting mechanism for a railway brake valve. The pressure limiting mechanism for the railway brake valve comprises a valve body, wherein an inner partition wall is arranged in the valve body and divides the internal part of the valve body into an upper cavity and a lower cavity, which are closed mutually; a piston is arranged in the upper cavity and divides the upper cavity into an upper piston cavity and a lower piston cavity, which are closed mutually, a spring seat is arranged in the lower cavity, a spring is arranged between the spring seat and the inner bottom surface of the valve body, a valve with a guide rod is arranged on the spring seat, the upper end of the guide rod penetrates through the inner partition wall to be connected with the piston, the valve body is provided with an input port and an output port, communicated with the lower cavity, and an atmosphere vent communicated with the lower piston cavity, the upper piston cavity is communicated with the output port, a valve port is formed at the position of the input port, the valve and the valve port are cooperated with each other correspondingly to control the opening and closing of the input port. According to the pressure limiting mechanism, the pressure intensity of high-pressure gas entering through the input port can be reduced to a set value and then the high-pressure gas is output through the output port.
Description
Technical field
The invention belongs to rolling stock technical field, particularly to a kind of railway brake valve limiting mechanism of pressure.
Background technology
In railway brake valve product, the restriction to gas pressure intensity is most basic requirement, it is therefore desirable to the limiting mechanism of pressure that simple in construction, control are accurately, reliability is high.
Summary of the invention
It is an object of the invention to: for the problem of above-mentioned existence, it is provided that a kind of the pressure of gases at high pressure can be restricted to desirable value the railway brake valve limiting mechanism of pressure exported.
nullThe technical scheme is that and be achieved in that: a kind of railway brake valve limiting mechanism of pressure，Including valve body，It is characterized in that: in described valve body, be provided with separation inwall，Valve inner is divided into the most airtight upper chamber and lower chambers by described separation inwall，It is provided with piston in described upper chamber，Upper chamber is divided into the most airtight piston upper chamber and piston cavity of resorption by described piston，Described bottom chamber is provided with spring base，It is provided with spring between described spring base and valve body inner bottom surface，Described spring base is provided with the valve of guide，Described guide post upper end is through separating inwall and being connected with piston，Described valve body is provided with the input port connected with lower chambers and delivery outlet，And the atmosphere entry connected with piston cavity of resorption，Described piston upper chamber connects with delivery outlet，It is provided with valve port at described input port，Described valve controls the opening and closing of input port with valve port corresponding matching.
Railway brake valve limiting mechanism of pressure of the present invention, it is provided with annular groove at described piston outer periphery, sealing ring A it is provided with, at described guide post through separating at inwall, being provided with sealing ring B guide post and separation inwall in described annular groove, between piston and valve interior wall.
Railway brake valve limiting mechanism of pressure of the present invention, it is provided with groove in described valve lower surface, is provided with and the rubber of valve port corresponding matching in described groove.
The present invention mutual restriction by each chamber pressure of valve inner, it is possible to the pressure of the gases at high pressure entered input port is reduced to set value, and exports from delivery outlet, thus ensures that delivery outlet pressure is preset pressure value.Present configuration is simple, control accurately and reliability is high.
Accompanying drawing explanation
Fig. 1 is the present invention structural representation when open state.
Fig. 2 be the present invention in off position time structural representation.
Labelling in figure: 1 is valve body, and 1a is upper chamber, and 1b is lower chambers, 2 for separating inwall, and 3 is piston, and 3a is piston upper chamber, 3b is piston cavity of resorption, and 4 is spring base, and 5 is spring, 6 is guide post, and 7 is valve, and 8 is input port, 9 is delivery outlet, and 10 is atmosphere entry, and 11 is valve port, 12 is sealing ring A, and 13 is sealing ring B, and 14 is rubber.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
nullAs shown in Figure 1，A kind of railway brake valve limiting mechanism of pressure，Including valve body 1，Separation inwall 2 it is provided with in described valve body 1，Described separation inwall 2 is divided into the most airtight upper chamber 1a and lower chambers 1b by internal for valve body 1，It is provided with piston 3 in described upper chamber 1a，Described piston 3 periphery is provided with annular groove，In described annular groove、It is provided with sealing ring A12 between piston 3 and valve body 1 inwall，Upper chamber 1a is divided into the most airtight piston upper chamber 3a and piston cavity of resorption 3b by described piston 3，Spring base 4 it is provided with in described lower chambers 1b，It is provided with spring 5 between described spring base 4 and valve body 1 inner bottom surface，Described spring base 4 is provided with the valve 7 of guide 6，Described guide post 6 upper end is through separating inwall 2 and being connected with piston 3，At described guide post 6 through separating at inwall 2、It is provided with sealing ring B13 between guide post 6 and separation inwall 2，Described valve body 1 is provided with the input port 8 connected with lower chambers 1b and delivery outlet 9，And the atmosphere entry 10 connected with piston cavity of resorption 3b，Described piston upper chamber 3a connects with delivery outlet 9，It is provided with valve port 11 at described input port 8，Described valve 7 lower surface is provided with groove，It is provided with in described groove and the rubber 14 of valve port 11 corresponding matching，The opening and closing of input port 8 is controlled by valve 7.
The operation principle of the present invention is:
(a) open state
As it is shown in figure 1, in the original state of work, due to the effect of spring force, valve is made to leave the valve port of valve body lower end, now the path between input port and delivery outlet is in open state, and the compressed air entered from input port can enter delivery outlet by this path, simultaneously also into piston upper chamber.Along with the continuous rising of input port pressure, compressed air promotes piston gradually to move down, and promotes valve constantly to move down therewith, and the rubber face of valve constantly reduces with the distance of valve body lower end valve port.When input port pressure is less than when presetting voltage limiting value (voltage limiting value is determined) by spring parameter, compressed air cannot make piston be displaced downwardly to close input port to the path of delivery outlet, the rubber face of valve i.e. cannot be made to contact with the valve port of valve body lower end, and now limiting mechanism of pressure has been at open state.
(b) closed mode
As shown in Figure 2, along with the compressed air entered from input port constantly enters delivery outlet, compressed air promotes piston gradually to move down, promoting valve constantly to move down therewith, the rubber face of valve is contracted to 0 with the distance of valve body lower end valve port, has cut off the air flue between input port and delivery outlet, the compressed air of input port cannot be introduced into delivery outlet, therefore the compressed air pressure of delivery outlet remains default voltage limiting value, does not continues to rise, and limiting mechanism of pressure is closed.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, should be included within the scope of the present invention.
Claims (3)
- null1. a railway brake valve limiting mechanism of pressure，Including valve body (1)，It is characterized in that: in described valve body (1), be provided with separation inwall (2)，Described separation inwall (2) is divided into the most airtight upper chamber (1a) and lower chambers (1b) by internal for valve body (1)，Piston (3) it is provided with in described upper chamber (1a)，Upper chamber (1a) is divided into the most airtight piston upper chamber (3a) and piston cavity of resorption (3b) by described piston (3)，Spring base (4) it is provided with in described lower chambers (1b)，Spring (5) it is provided with between described spring base (4) and valve body (1) inner bottom surface，Described spring base (4) is provided with the valve (7) of guide (6)，Described guide post (6) upper end is through separating inwall (2) and being connected with piston (3)，Described valve body (1) is provided with the input port (8) and delivery outlet (9) connected with lower chambers (1b)，And the atmosphere entry (10) connected with piston cavity of resorption (3b)，Described piston upper chamber (3a) connects with delivery outlet (9)，Described input port (8) place is provided with valve port (11)，Described valve (7) controls the opening and closing of input port (8) with valve port (11) corresponding matching.
- Railway brake valve limiting mechanism of pressure the most according to claim 1, it is characterized in that: described piston (3) periphery is provided with annular groove, in described annular groove, between piston (3) and valve body (1) inwall, it is provided with sealing ring A(12), it is provided with sealing ring B(13 at described guide post (6) through separation inwall (2) place, guide post (6) and separation inwall (2)).
- Railway brake valve limiting mechanism of pressure the most according to claim 1 and 2, it is characterised in that: described valve (7) lower surface is provided with groove, in described groove, is provided with the rubber (14) with valve port (11) corresponding matching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610372799.6A CN105857287B (en) | 2016-05-31 | 2016-05-31 | A kind of railway brake valve limiting mechanism of pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610372799.6A CN105857287B (en) | 2016-05-31 | 2016-05-31 | A kind of railway brake valve limiting mechanism of pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105857287A true CN105857287A (en) | 2016-08-17 |
| CN105857287B CN105857287B (en) | 2019-01-08 |
Family
ID=56642893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610372799.6A Active CN105857287B (en) | 2016-05-31 | 2016-05-31 | A kind of railway brake valve limiting mechanism of pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105857287B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1608911A (en) * | 2003-10-18 | 2005-04-27 | 霍尔德克斯制动产品有限公司 | A modulator |
| WO2011151645A1 (en) * | 2010-06-02 | 2011-12-08 | Haldex Brake Products Limited | Valve assembly |
| CN104781114A (en) * | 2012-09-12 | 2015-07-15 | 克诺尔-布里姆斯轨道车辆系统有限公司 | Pressure control valve with integrated pressure compensation function and check valve function |
| CN105156728A (en) * | 2015-10-14 | 2015-12-16 | 四川制动科技股份有限公司 | Pressure regulating mechanism |
| CN205632473U (en) * | 2016-05-31 | 2016-10-12 | 眉山中车制动科技股份有限公司 | Railway is voltage limiting mechanism for brake valve |
-
2016
- 2016-05-31 CN CN201610372799.6A patent/CN105857287B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1608911A (en) * | 2003-10-18 | 2005-04-27 | 霍尔德克斯制动产品有限公司 | A modulator |
| WO2011151645A1 (en) * | 2010-06-02 | 2011-12-08 | Haldex Brake Products Limited | Valve assembly |
| CN104781114A (en) * | 2012-09-12 | 2015-07-15 | 克诺尔-布里姆斯轨道车辆系统有限公司 | Pressure control valve with integrated pressure compensation function and check valve function |
| CN105156728A (en) * | 2015-10-14 | 2015-12-16 | 四川制动科技股份有限公司 | Pressure regulating mechanism |
| CN205632473U (en) * | 2016-05-31 | 2016-10-12 | 眉山中车制动科技股份有限公司 | Railway is voltage limiting mechanism for brake valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105857287B (en) | 2019-01-08 |
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