CN104763831B - Safety valve - Google Patents
Safety valve Download PDFInfo
- Publication number
- CN104763831B CN104763831B CN201510199447.0A CN201510199447A CN104763831B CN 104763831 B CN104763831 B CN 104763831B CN 201510199447 A CN201510199447 A CN 201510199447A CN 104763831 B CN104763831 B CN 104763831B
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- China
- Prior art keywords
- valve
- cavity
- piston
- valve rod
- rod
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Classifications
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- 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
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a safety valve which comprises a valve body, a valve deck, a piston and a valve rod. A cavity formed by the valve body and the valve deck is divided into an upper piston cavity and a lower piston cavity through the piston, a shrinkage cavity A is formed in the piston, a valve seat is arranged in the valve body, the other end of the valve rod is matched with the valve seat to divide the lower piston cavity into a cavity A communicated with a regulator and a cavity B communicated with an exhaust valve, a shrinkage cavity B is formed in the valve rod, a spring is arranged at the part, below the valve rod, in the valve body, and the aperture of the shrinkage cavity B is smaller than the inflating aperture of the exhaust valve. The safety valve is installed between the regulator of an anti-skid device and the exhaust valve, when a system is normal, if wheels slide, the regulator can function normally and play the normal anti-skid role, when a hose connected with the regulator breaks, the pressure balance of the exhaust valve can be maintained, a path between a braking cylinder and the atmosphere is maintained to be closed, and the braking cylinder controlled by the regulator can still normally execute braking.
Description
Technical field
The invention belongs to rolling stock technology field, particularly to a kind of actuator for being arranged on nonskid device and air draft
Relief valve between valve.
Background technology
In the nonskid device of existing rail truck, exhaust valve is all to be directly connected to actuator by flexible pipe, so, when even
When connecing the flexible pipe of actuator rupture occurring, in exhaust valve, the pressure air of respective cavities can quickly be revealed, so that in exhaust valve
Pressure balance be unable to maintain that, cause exhaust valve inside brake cylinder to the path of air to be opened, so that the system by this actuator
Dynamic cylinder cannot normally be implemented to brake, and causes potential safety hazard.
Content of the invention
It is an object of the invention to: for above-mentioned problem, provide a kind of flexible pipe in connection adjustor to occur broken
When splitting, make to remain to normally implement the relief valve of braking by the checking cylinder that this actuator controls.
The technical scheme is that and be achieved in that: a kind of relief valve, including valve body, valve gap and be arranged on valve body with
Piston in the formed cavity of valve gap and valve rod, described valve rod one end is connected with piston, and valve body is formed by described piston with valve gap
Cavity be divided into piston upper chamber body and piston lower chamber it is characterised in that: shrinkage cavity a is provided with described piston, described
It is provided with valve seat, piston lower chamber is divided into the cavity connecting with actuator with valve seat cooperation by the described valve rod other end in valve body
The a and cavity b connecting with exhaust valve, is provided with shrinkage cavity b on described valve rod, in described valve body, is provided with below valve rod
Spring, described valve rod makes the valve port of valve seat be closed under the action of the spring, described piston upper chamber body pass through shrinkage cavity a with
Cavity a connects, and described cavity a is connected with cavity b by shrinkage cavity b, and the aperture of described shrinkage cavity b is less than the inflation aperture of exhaust valve.
Relief valve of the present invention, it is provided with the lamina membranacea fitting tightly therewith, described lamina membranacea in described piston circumference
It is pressed on valve body by valve gap, by the cooperation of piston and lamina membranacea, so that piston upper chamber body is only connected with cavity a by shrinkage cavity a.
Relief valve of the present invention, it is on described valve seat, be provided with o type sealing ring, in institute between valve seat and valve body
State on valve rod and valve seat corresponding position is provided with sealing gasket, by the cooperation of valve rod and valve seat, make the valve port of valve seat in off position
When, described cavity a is only connected with cavity b by shrinkage cavity b.
Relief valve of the present invention, it is provided with filter dirt piece in the inlet port of described valve stem end, shrinkage cavity b.
Relief valve of the present invention, its described shrinkage cavity b is by the axial direction part path arranging along valve rod axle center and along valve rod
The radial section path composition being radially arranged.
The present invention is arranged between the actuator of nonskid device and exhaust valve, when system is normal, if wheel slides,
Actuator can normally act in generation, plays normally anti-skidding effect, when the flexible pipe of connection adjustor occurs rupture, by peace
The setting of full valve, can make the pressure balance of exhaust valve be maintained, and so that checking cylinder to the path of air is remained off, by this tune
The checking cylinder that section device controls remains to normally implement to brake.
Brief description
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of piston in the present invention.
Fig. 3 is the structural representation of valve rod in the present invention.
In figure labelling: 1 is valve body, 2 is valve gap, and 3 is piston, and 4 is valve rod, and 5 is piston upper chamber body, and 6 is piston lower chamber,
7 is shrinkage cavity a, and 8 is valve seat, and 9 is cavity a, and 10 is cavity b, and 11 is shrinkage cavity b, and 11a is axial direction part path, and 11b leads to for radial section
Road, 12 is spring, and 13 is lamina membranacea, and 14 is o type sealing ring, and 15 is sealing gasket, and 16 is filter dirt piece.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1,2 and 3, a kind of relief valve, including valve body 1, valve gap 2 and be arranged on valve body 1 and formed with valve gap 2
Piston 3 in cavity and valve rod 4, described valve rod 4 one end is connected with piston 3, the chamber that valve body 1 is formed by described piston 3 with valve gap 2
Body is divided into piston upper chamber body 5 and piston lower chamber 6, is provided with shrinkage cavity a7 on described piston 3, arranges in described valve body 1
Have valve seat 8, described valve rod 4 other end coordinate with valve seat 8 piston lower chamber 6 is divided into the cavity a9 connecting with actuator and
The cavity b10 connecting with exhaust valve, is provided with shrinkage cavity b11 on described valve rod 4, arranges in described valve body 1, below valve rod 4
There is spring 12, described valve rod 4 makes the valve port of valve seat 4 be closed in the presence of spring 12, set in described piston 3 circumference
It is equipped with the lamina membranacea 13 fitting tightly therewith, described lamina membranacea 13 is pressed on valve body 1 by valve gap 2, by piston 3 and lamina membranacea 13
Cooperation, makes piston upper chamber body 5 only connect with cavity a9 by shrinkage cavity a7, setting on described valve seat 8, between valve seat 8 and valve body 1
There is o type sealing ring 14, on described valve rod 4 and valve seat 8 corresponding position is provided with sealing gasket 15, by joining of valve rod 4 and valve seat 8
Close, make the valve port of valve seat 8 in off position when, described cavity a9 is only connected with cavity b10 by shrinkage cavity b11, described shrinkage cavity b11
Aperture be less than the inflation aperture of exhaust valve, the structure of described exhaust valve is disclosed in Chinese invention patent 201410630556.9
Content.
Wherein, the inlet port in described valve rod 4 end, shrinkage cavity b11 is provided with filter dirt piece 16, and described shrinkage cavity b11 is by edge
The axial direction part path 11a of valve rod 4 axle center setting and the radial section path 11b composition being radially arranged along valve rod 4.
The operation principle of the present invention is:
As shown in figure 1, exhaust valve is entered in cavity b by the pressure air that air-filled pore pours, now the valve port of valve seat exists
It is closed under valve rod effect, the pressure air in cavity b enters in cavity a via shrinkage cavity b, the pressure in cavity a is empty
Gas enters in piston upper chamber body via shrinkage cavity a again, till the pressure balance in piston upper chamber body, cavity a and cavity b.
When system is normal, if wheel slides, actuator generation acts on, that is, actuator open logical with atmosphere
Road, the air pressure quick release in cavity a, due to being limited by shrinkage cavity a on piston, the pressure air in piston upper chamber body is not
Can disappear quickly, so that piston upper and lower cavity body forms pressure reduction, pressure reduction promotes piston quickly to move down, in moving process,
Piston and template remain the sealing state fitting tightly, and by the movement of piston, promote valve rod to open valve port, make cavity b
Interior pressure air is quickly discharged, and the cavity indoor pressure air that will be connected with cavity b in exhaust valve is quickly discharged, air draft valve actuation
Make, produce normally anti-skidding effect.
When the flexible pipe of connection adjustor occurs rupture, the air pressure in cavity a leaks, simultaneously piston upper chamber body
Air pressure leak together also by shrinkage cavity a, prolongation over time, the pressure air base in piston upper chamber body and cavity a
This emptying and pressure tends to equal, valve rod so that valve port is closed under the action of the spring although the now pressure in cavity a
Air still can enter in cavity a through shrinkage cavity b, but the aperture of shrinkage cavity b is less than the inflation aperture of exhaust valve, therefore exhaust valve
Pressure balance remains able to be maintained, and so that checking cylinder to the path of air is remained off, the checking cylinder being controlled by this actuator
Remain to normally implement to brake.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (5)
1. a kind of relief valve, including valve body (1), valve gap (2) and be arranged on valve body (1) and the formed cavity of valve gap (2)
Piston (3) and valve rod (4), described valve rod (4) one end is connected with piston (3), and described piston (3) is by valve body (1) and valve gap (2) shape
Become cavity be divided into piston upper chamber body (5) and piston lower chamber (6) it is characterised in that: be provided with contracting on described piston (3)
Hole a(7), it is provided with valve seat (8) in described valve body (1), described valve rod (4) other end is coordinated piston cavity of resorption with valve seat (8)
Body (6) is divided into the cavity a(9 connecting with actuator) and the cavity b(10 that connects with exhaust valve), on described valve rod (4)
It is provided with shrinkage cavity b(11), it is provided with spring (12) in described valve body (1), below valve rod (4), described valve rod (4) is in spring
(12) valve port making valve seat (8) in the presence of is closed, and described piston upper chamber body (5) passes through shrinkage cavity a(7) and cavity a
(9) connect, described cavity a(9) pass through shrinkage cavity b(11) with cavity b(10) connect, described shrinkage cavity b(11) and aperture less than air draft
The inflation aperture of valve.
2. relief valve according to claim 1 it is characterised in that: be provided with described piston (3) circumference and closely paste therewith
The lamina membranacea (13) closing, described lamina membranacea (13) is pressed on valve body (1) by valve gap (2), by joining of piston (3) and lamina membranacea (13)
Close, make piston upper chamber body (5) only pass through shrinkage cavity a(7) with cavity a(9) connect.
3. relief valve according to claim 1 it is characterised in that: described valve seat (8) is upper, valve seat (8) and valve body (1) it
Between be provided with o type sealing ring (14), upper and valve seat (8) corresponding position is provided with sealing gasket (15) in described valve rod (4), by valve
The cooperation of bar (4) and valve seat (8), make the valve port of valve seat (8) in off position when, described cavity a(9) only pass through shrinkage cavity b(11)
With cavity b(10) connect.
4. relief valve according to claim 3 it is characterised in that: in described valve rod (4) end, shrinkage cavity b(11) air inlet
Mouth end is provided with filter dirt piece (16).
5. relief valve as claimed in any of claims 1 to 4 it is characterised in that: described shrinkage cavity b(11) by along valve rod
(4) the axial direction part path (11a) of axle center setting and radial section path (11b) composition being radially arranged along valve rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510199447.0A CN104763831B (en) | 2015-04-24 | 2015-04-24 | Safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510199447.0A CN104763831B (en) | 2015-04-24 | 2015-04-24 | Safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104763831A CN104763831A (en) | 2015-07-08 |
| CN104763831B true CN104763831B (en) | 2017-02-01 |
Family
ID=53645843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510199447.0A Active CN104763831B (en) | 2015-04-24 | 2015-04-24 | Safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104763831B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108725416B (en) * | 2018-05-30 | 2024-05-14 | 眉山中车制动科技股份有限公司 | Partial pressure reducing valve rod suitable for small pressure reducing brake air distribution valve of railway passenger car |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201401392Y (en) * | 2009-04-22 | 2010-02-10 | 浙江华昌液压机械有限公司 | Safety valve of hydrocylinder |
| CN102431541B (en) * | 2011-11-17 | 2013-11-20 | 四川制动科技股份有限公司 | Derailment-preventive emergency valve |
| CN103697207A (en) * | 2013-12-27 | 2014-04-02 | 李潘宝 | Pilot-operated pressure regulating valve |
| CN204114267U (en) * | 2014-08-05 | 2015-01-21 | 诸暨企航机械科技有限公司 | Pressure-limit valve mounting structure for valve |
| CN204553965U (en) * | 2015-04-24 | 2015-08-12 | 四川制动科技股份有限公司 | A kind of safety valve |
-
2015
- 2015-04-24 CN CN201510199447.0A patent/CN104763831B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104763831A (en) | 2015-07-08 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Three road 620010 Meishan province Sichuan City Dongpo District of Meishan science and Technology Industrial Park No. 68 Applicant after: Meisha Zhongke Brake Technology Co., Ltd. Address before: Three road 620010 Meishan province Sichuan City Dongpo District of Meishan science and Technology Industrial Park No. 68 Applicant before: Sichuan Brake Science and Technology Co. Ltd. |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |