CN201472366U - Compound relay valve - Google Patents
Compound relay valve Download PDFInfo
- Publication number
- CN201472366U CN201472366U CN2009201770662U CN200920177066U CN201472366U CN 201472366 U CN201472366 U CN 201472366U CN 2009201770662 U CN2009201770662 U CN 2009201770662U CN 200920177066 U CN200920177066 U CN 200920177066U CN 201472366 U CN201472366 U CN 201472366U
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- Prior art keywords
- valve
- relay valve
- piston
- relay
- port
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- Expired - Fee Related
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Abstract
The utility model relates to a compound relay valve, which consists of a quick release valve body, a two-way valve body and a relay valve body, wherein the quick release valve body is provided with a quick release valve air inlet, quick release valve air output port, a quick release valve air channel, a valve plate and a quick release valve atmosphere output port, the two-way valve body is provided with a first air inlet input port of the two-way valve , a second air inlet input port of the two-way valve, an air input port of the two-way valve, and an air channel of the two-way valve, the air channel of the two-way valve is provided with a pneumatic piston of the two-way valve, the relay valve body is provided with a first piston of the relay valve, a second piston of the relay valve, a second piston reset spring of the relay valve, an air channel of the relay valve, an air discharge port of the relay valve, a first air inlet of the relay valve, a second air inlet of the relay valve, an air inlet of the relay valve and an air output port of the relay valve, and is characterized in that the first piston of the relay valve is provided with an extended segment of the first piston, the air channel of the relay valve is provided with an air channel boss of the relay valve, the outer wall of the extended segment of the first piston is matched with the inner wall of the air channel boss of the relay valve so as to form a seal pair.
Description
Technical field
The utility model relates to a kind of automobile compressed air brake relay valve, especially a kind of combined type relay valve.
Background technology
Existing compound relay valve has valve body, described valve body is by the rapid release valve body, two-way valve body and relay valve body constitute, the rapid release valve body has the rapid release valve admission port, the rapid release valve gas delivery port, the rapid release valve air flue, valve block and rapid release valve atmosphere delivery port, two-way valve body two ends have two-way valve first air inlet input port and the two-way valve second air inlet input port respectively, also offer the two-way valve gas delivery port on the two-way valve body, has the two-way valve air flue between two-way valve first air inlet input port and the two-way valve second air inlet input port, has the two-way valve pneumatic piston in the two-way valve air flue, relay valve body has the relay valve first piston, relay valve second piston, relay valve second piston reset spring, the relay valve air flue, the relay valve exhausr port, relay valve first admission port, relay valve second admission port, relay valve the 3rd admission port and relay valve gas delivery port, the relay valve first piston has relay valve first piston cavity, relay valve second piston has the relay valve second piston cavity, described rapid release valve air flue is positioned at the rapid release valve body, described rapid release valve gas delivery port is positioned at rapid release valve body one side, described rapid release valve gas delivery port and rapid release valve atmosphere delivery port are connected by the rapid release valve air flue, described valve block is positioned at the rapid release valve air flue, described valve block one side matches with rapid release valve atmosphere delivery port, described valve block another side matches with the rapid release valve admission port, described two-way valve air flue is connected with the two-way valve gas delivery port, described two-way valve pneumatic piston and two-way valve air flue adapt, described two-way valve pneumatic piston sidewall matches with the two-way valve gas delivery port, described two-way valve gas delivery port is connected with the rapid release valve admission port, described relay valve first piston and relay valve second piston all are positioned at the relay valve air flue, described relay valve second piston reset spring is nested with at relay valve second piston outer wall, described relay valve first piston one side matches with relay valve second admission port, described relay valve first piston another side simultaneously matches with relay valve second piston, the described relay valve second piston another side matches with the relay valve exhausr port, the described two-way valve first air inlet input port is connected with the relay valve gas delivery port by relay valve first admission port, and described rapid release valve atmosphere delivery port is successively by relay valve first piston cavity, the relay valve second piston cavity is connected with the servo exhausr port.Its principle of work is:
1, during braking during standstill, the two-way valve second air inlet input port pressure reduces, under the gaseous tension effect of rapid release valve gas delivery port, allow the valve block of rapid release valve lift rapidly, rapid release valve gas delivery port and rapid release valve admission port are disconnected, and rapid release valve gas delivery port and rapid release valve atmosphere delivery port are connected, gas passes through relay valve first piston cavity, the relay valve second piston cavity and servo exhausr port exhaust to atmosphere successively from rapid release valve atmosphere delivery port, make air chamber pressure reduce to zero, braking during standstill is worked.
When stopping braking during standstill, pressurized air enters the two-way valve air flue through the two-way valve second air inlet input port, produce pressure promotion two-way valve pneumatic piston and move, disconnect connected state fully until two-way valve first air inlet input port and two-way valve gas delivery port to the two-way valve first air inlet input port direction.At this moment, two-way valve second air inlet input port and two-way valve gas delivery port are connected fully, gaseous tension enters the rapid release valve admission port by the two-way valve gas delivery port and acts on the valve block another side of rapid release valve, the rapid release valve atmosphere delivery port of shutoff valve block one side, and with being about to the connection of rapid release valve admission port and rapid release valve gas delivery port, pressurized air arrives exterior brake application by spring air chamber through the rapid release valve gas delivery port, removes braking during standstill.
2, during service brake, pressurized air enters through relay valve second admission port, producing pressure promotion relay valve first piston moves, make the relay valve first piston overcome the elastic force of relay valve second piston reset spring, promoting relay valve second piston moves, allow valve open, this moment, relay valve the 3rd admission port and relay valve gas delivery port were connected, pressurized air arrives the relay valve gas delivery port through relay valve the 3rd admission port, the pressurized air part arrives another brake application by spring air chamber of extraneous bonded assembly through the relay valve gas delivery port, produces service brake power; At this moment, if during two-way valve second air inlet input port inefficacy (gas leakage), the part pressurized air arrives the two-way valve first air inlet input port through relay valve first admission port, produce pressure the two-way valve pneumatic piston is moved to the two-way valve second air inlet input port direction, disconnect fully until two-way valve second air inlet input port and two-way valve gas delivery port.At this moment, two-way valve first air inlet input port and two-way valve gas delivery port are connected fully, gaseous tension enters the rapid release valve admission port by the two-way valve gas delivery port and acts on the valve block another side of rapid release valve, the rapid release valve atmosphere delivery port of shutoff valve block one side, and with being about to the connection of rapid release valve admission port and rapid release valve gas delivery port, pressurized air arrives exterior brake application by spring air chamber through the rapid release valve gas delivery port, removes braking during standstill power, and service brake can normally be moved.
Stop the driving glancing impact, relay valve second admission port stops air inlet, relay valve second piston disconnects relay valve the 3rd admission port and relay valve gas delivery port under the effect of relay valve second piston reset spring, relay valve gas delivery port air pressure continues to act on the relay valve first piston, allow the relay valve first piston continue to rise, open the end face valve port between relay valve first piston and relay valve second piston, make the relay valve gas delivery port gas can be through the relay valve air flue from relay valve exhausr port exhaust to atmosphere, make air chamber pressure reduce to zero, remove service brake power.
But, in the driving braking procedure, when pressurized air enters through relay valve second admission port, producing pressure promotion relay valve first piston moves, make the relay valve first piston overcome the elastic force of relay valve second piston reset spring, promoting relay valve second piston moves, also do not allow valve open, be that relay valve the 3rd admission port and relay valve gas delivery port are not also connected, and the relay valve first piston is when having contacted the path of having closed between relay valve gas delivery port and the relay valve exhausr port with relay valve second piston, described relay valve gas delivery port gaseous tension is pushing tow relay valve first piston probably, allow relay valve first piston stop motion (air pressure balance) even fall back (the air pressure contrast is excessive), make service brake power lose efficacy, caused potential safety hazard.
Therefore, there is defective in existing compound relay valve, need improve.
The utility model content
The purpose of this utility model provides a kind of combined type relay valve that can guarantee traffic safety, save production cost and get rid of potential safety hazard.
Combined type relay valve of the present utility model is conceived substantially: at the driving glancing impact, for prevent that control presssure is lower than input pressure valve was lost efficacy when needs are driven a vehicle; According to the air pressure balance principle, usable floor area poor (control end be bullied pressure surface long-pending long-pending greater than carrying out the gas circuit end pressure surface of being bullied) reaches the draught head requirement of setting, to satisfy the service brake needs and to get rid of potential safety hazard, guarantees the safety and the reliability of service brake.
Combined type relay valve of the present utility model specifically has valve body, described valve body is by the rapid release valve body, two-way valve body and relay valve body constitute, the rapid release valve body has the rapid release valve admission port, the rapid release valve gas delivery port, the rapid release valve air flue, valve block and rapid release valve atmosphere delivery port, two-way valve body two ends have two-way valve first air inlet input port and the two-way valve second air inlet input port respectively, also offer the two-way valve gas delivery port on the two-way valve body, has the two-way valve air flue between two-way valve first air inlet input port and the two-way valve second air inlet input port, has the two-way valve pneumatic piston in the two-way valve air flue, relay valve body has the relay valve first piston, relay valve second piston, relay valve second piston reset spring, the relay valve air flue, the relay valve exhausr port, relay valve first admission port, relay valve second admission port, relay valve the 3rd admission port and relay valve gas delivery port, the relay valve first piston has relay valve first piston cavity, relay valve second piston has the relay valve second piston cavity, it is characterized in that described relay valve first piston has relay valve first piston extension, described relay valve air flue has relay valve air flue lug boss, and the outer wall of described relay valve first piston extension and the inwall of relay valve air flue lug boss match to merge and constitute sealing pair.
The first piston of relay valve described in the utility model has relay valve first piston extension, described relay valve air flue has relay valve air flue lug boss, and the outer wall of described relay valve first piston extension and the inwall of relay valve air flue lug boss are to cooperating and constituting sealing pair.Promptly allow the outer wall of relay valve first piston extension and the inwall of relay valve air flue lug boss constitute a less valve piston that is subjected to atmospheric pressure, thereby it is long-pending to have reduced the relay valve first piston lower surface pressure surface of being bullied, finally reach valve piston lower end area (gas input area of contact) less than relay valve first piston upper end area (control gaseous area of contact), enter onesize standard pressure even that is to say valve piston lower surface product space and relay valve first piston upper surface product space, the maximum pressure that valve piston lower end area is subjected to also is less than the minimum pressure that relay valve first piston upper end area is subjected to, and allows the relay valve first piston can promote relay valve second piston smoothly when control gaseous enters.Certainly, be subjected to certain gaseous tension,, also can allow the relay valve first piston overcome lower end air pressure and move when on the relay valve first piston during the controlled air pressure of area even that is to say valve piston lower end area.And then the relay valve first piston can not move up or keep motionless (equilibrium of pressure) when area under the valve piston has pressure, has difference of pressure in two ends up and down at the relay valve first piston all the time.The utility model improvement part is simple in structure effectively to be need not to carry out complicated processing, has saved productive costs, and connecting exterior line during use does not need to change especially yet, has made things convenient for the user, and can better guarantee traffic safety, has also got rid of potential safety hazard.
The working process of the utility model combined type relay valve is similar to existing compound relay valve, repeats no more herein.
Compared with the aforementioned existing similar products, combined type relay valve compact conformation of the present utility model guarantees traffic safety, saves production cost, got rid of potential safety hazard, has improved the safety of car load.
Content of the present utility model further illustrates with the following Examples, but content of the present utility model is not limited only to content related among the embodiment.
Description of drawings
Fig. 1 is the structural representation of combined type relay valve among the embodiment.
Fig. 2 is the exhaust condition scheme drawing of combined type relay valve when braking during standstill among Fig. 1.
Fig. 3 is the air feed view of the two-way valve second air inlet input port in Fig. 1 combined type relay valve.
Fig. 4 is the air feed view of relay valve second admission port in Fig. 1 combined type relay valve.
The specific embodiment
Shown in Fig. 1～4, the relay valve of combined type described in present embodiment combined type relay valve, has valve body, described valve body is by the rapid release valve body, two-way valve body and relay valve body constitute, the rapid release valve body has rapid release valve admission port 1, rapid release valve gas delivery port 2, rapid release valve air flue 3, valve block 4 and rapid release valve atmosphere delivery port 5, two-way valve body two ends have two-way valve first air inlet input port 6 and the two-way valve second air inlet input port 7 respectively, also offer two-way valve gas delivery port 8 on the two-way valve body, has two-way valve air flue 9 between two-way valve first air inlet input port 6 and the two-way valve second air inlet input port 7, has two-way valve pneumatic piston 10 in the two-way valve air flue 9, relay valve body has relay valve first piston 11, relay valve second piston 12, relay valve second piston reset spring 13, relay valve air flue 14, relay valve exhausr port 15, relay valve first admission port 16, relay valve second admission port 17, relay valve the 3rd admission port 18 and relay valve gas delivery port 19, relay valve first piston 11 has relay valve first piston cavity 20, relay valve second piston 12 has the relay valve second piston cavity 21, it is characterized in that described relay valve first piston 11 has relay valve first piston extension 22, described relay valve air flue 14 has relay valve air flue lug boss 23, and the outer wall of described relay valve first piston extension 22 and the inwall of relay valve air flue lug boss 22 match to merge and constitute sealing pair.
Claims (1)
1. combined type relay valve, has valve body, described valve body is by the rapid release valve body, two-way valve body and relay valve body constitute, the rapid release valve body has the rapid release valve admission port, the rapid release valve gas delivery port, the rapid release valve air flue, valve block and rapid release valve atmosphere delivery port, two-way valve body two ends have two-way valve first air inlet input port and the two-way valve second air inlet input port respectively, also offer the two-way valve gas delivery port on the two-way valve body, has the two-way valve air flue between two-way valve first air inlet input port and the two-way valve second air inlet input port, has the two-way valve pneumatic piston in the two-way valve air flue, relay valve body has the relay valve first piston, relay valve second piston, relay valve second piston reset spring, the relay valve air flue, the relay valve exhausr port, relay valve first admission port, relay valve second admission port, relay valve the 3rd admission port and relay valve gas delivery port, the relay valve first piston has relay valve first piston cavity, relay valve second piston has the relay valve second piston cavity, it is characterized in that described relay valve first piston has relay valve first piston extension, described relay valve air flue has relay valve air flue lug boss, and the outer wall of described relay valve first piston extension and the inwall of relay valve air flue lug boss match to merge and constitute sealing pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201770662U CN201472366U (en) | 2009-09-25 | 2009-09-25 | Compound relay valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201770662U CN201472366U (en) | 2009-09-25 | 2009-09-25 | Compound relay valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201472366U true CN201472366U (en) | 2010-05-19 |
Family
ID=42408609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201770662U Expired - Fee Related CN201472366U (en) | 2009-09-25 | 2009-09-25 | Compound relay valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201472366U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101992765A (en) * | 2010-11-18 | 2011-03-30 | 三一汽车起重机械有限公司 | Double control relay valve and pneumatic braking system comprising same |
-
2009
- 2009-09-25 CN CN2009201770662U patent/CN201472366U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101992765A (en) * | 2010-11-18 | 2011-03-30 | 三一汽车起重机械有限公司 | Double control relay valve and pneumatic braking system comprising same |
| CN101992765B (en) * | 2010-11-18 | 2012-10-03 | 三一汽车起重机械有限公司 | Double control relay valve and pneumatic braking system comprising same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20180925 |