CN100510491C - Decompression type four-loop protection valve - Google Patents
Decompression type four-loop protection valve Download PDFInfo
- Publication number
- CN100510491C CN100510491C CNB2007101137444A CN200710113744A CN100510491C CN 100510491 C CN100510491 C CN 100510491C CN B2007101137444 A CNB2007101137444 A CN B2007101137444A CN 200710113744 A CN200710113744 A CN 200710113744A CN 100510491 C CN100510491 C CN 100510491C
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- valve
- pressure
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- regulating
- valve body
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- Valves And Accessory Devices For Braking Systems (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention relates to a pressure reduction type four-way protection valve, which is used for the heave duty load-carrying vehicle to reduce the systematic pressure, and is composed of four independent cavities, the cavities are connected with each other by valve bodies, a passage is arranged in the valve body connecting two parallel cavities and a one-way valve is arranged at the inlet of the passage; the cavity is composed of a first pressure-regulating end cover, a valve body and a second pressure-regulating end cover; the cavity is divided into an upper cavity and a lower cavity by the valve body; a first pressure-regulating screw, a first spring seat, a first pressure-regulating spring, a valve plate and a first diaphragm are sequentially arranged from up to down in the upper cavity; a valve lever, a second diaphragm, a second pressure-regulating spring, a second spring seat and a second pressure-regulating screw are sequentially arranged from up to down in the lower cavity; also a valve is arranged at the upper part of the valve lever. The invention integrates the relief valve and the four-way structure aiming at the pressure regulating requirement and the present state, which reduces the amount of pipe heads and makes the whole structure of the vehicle more compact and the performance more reliable.
Description
Technical field
The present invention relates to the four-loop protection valve that can reduce system pressure that heavy duty vehicle uses, specifically a kind of decompression type four-loop protection valve.
Background technique
Development along with automotive engineering; heavy duty vehicle uses compressed-air actuated parts more and more; from brake system; loudspeaker are to air suspension etc.; but the desired pressure of various systems has nothing in common with each other; requiring system pressure as air suspension is 1.2MPa; service brake pressure is 1MPa; parking braking pressure is 0.8MPa; therefore; the pressure of car load requires to bring up to 1.2MPa from present 0.8MPa; pressure according to each system requires to reduce pressure respectively adjustment then; in present braking line; has only independent four-loop protection valve and reduction valve difference separate connection at present in pipeline; go to realize the pressure adjustment; but increased the quantity of pipe joint, caused pipeline gas leakage easily.
Summary of the invention
The objective of the invention is to overcome above-mentioned shortcoming, provide a kind of reduction valve and four loops are fused to together decompression type four-loop protection valve.
Technological scheme of the present invention is: a kind of decompression type four-loop protection valve, comprise four independently cavitys, and be connected by valve body between each cavity, be provided with passage in the valve body between two cavitys that connection parallels, the place is provided with one-way valve in the passway; Described cavity is made up of the first pressure regulation end cap, valve body and the second pressure regulation end cap, valve body is divided into upper cavity and lower chamber with cavity, is provided with first pressure regulating screw, first spring seat, first pressure adjusting spring, valve plates and primary diaphragm in the upper cavity from top to bottom successively; Be provided with valve lever, secondary diaphragm, second pressure adjusting spring, second spring seat and second pressure regulating screw in the lower chamber from top to bottom successively, also be provided with valve on the top of valve lever.
The invention has the beneficial effects as follows: at pressure controlled requirement and present situation, reduction valve and four loops are fused to together, have reduced the quantity of pipe joint, make complete vehicle structure compacter, more reliable performance through structural adjustment.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
Among the figure: 1 first pressure regulating screw, 2 first pressure regulation end caps, 3 first spring seats, 4 first pressure adjusting springs, 5 valve plates, 6 primary diaphragms, 7 valves, 8 valve levers, 9 secondary diaphragms, 10 second pressure adjusting springs, 11 second pressure regulation end caps, 12 second pressure regulating screws, 13 second spring seats, 14 valve bodies, 15 first one-way valves, 16 first passages, 17 first suction ports, 18 first cavitys, 19 second cavitys, 20 the 3rd cavitys, 21 first air outlets, 22 second channels, 23 second one-way valves.
Embodiment
As shown in the figure.
A kind of decompression type four-loop protection valve comprises four identical independently cavitys, is connected by valve body between each cavity, connects in the valve body between two cavitys that parallel to be provided with passage, and the place is provided with one-way valve in the passway; Described cavity is made up of the first pressure regulation end cap 2, valve body 14 and the second pressure regulation end cap 11, valve body 14 is divided into upper cavity and lower chamber with cavity, is provided with first pressure regulating screw 1, first spring seat 3, first pressure adjusting spring 4, valve plates 5 and primary diaphragm 6 in the upper cavity from top to bottom successively; Be provided with valve lever 8, secondary diaphragm 9, second pressure adjusting spring 10, second spring seat 13 and second pressure regulating screw 12 in the lower chamber from top to bottom successively, also be provided with valve 7 on the top of valve lever 8.
Be respectively equipped with primary diaphragm 6 and secondary diaphragm 9 between the first pressure regulation end cap 2 of the present invention, the second pressure regulation end cap 11 and the valve body 14, first pressure regulating screw 1, first spring seat 3, first pressure adjusting spring 4 and valve plates 5, the first pressure regulating screws 1 are installed between the top of valve body 14 and the first pressure regulation end cap 2 to be screwed on the first pressure regulation end cap 2 and to be pressed on first spring seat 3.Valve 7 is housed in the valve body 14.Valve lever 8, second pressure adjusting spring 10, second spring seat 13 and second pressure regulating screw 12 are installed between valve body 14 belows and the second pressure regulation end cap 11, valve lever 8 links into an integrated entity with secondary diaphragm 9 and links to each other with second pressure adjusting spring 10, and second pressure regulating screw 12 is screwed on the second pressure regulation end cap 11 and is pressed on second spring seat 13.
Gas arrives first cavity 18 by first suction port 17 and promotes to move on primary diaphragm 6, the valve plates 5, compresses first pressure adjusting spring 4, and after meeting the requirements of gas pressure, valve plates 5 is opened, and gas enters second cavity 19; During owing to no gas in second cavity 19, second pressure adjusting spring 10 promotes to move on the valve lever 8, valve 7 is backed down, so after gas enters second cavity 19, enter into the 3rd cavity 20, be transported to gas cylinder by first air outlet 21, pressurized air in second cavity 19 promotes secondary diaphragm 9 and moves down, compress second pressure adjusting spring 10, after meeting the requirements of air pressure, valve 7 is closed, gas in second cavity 19 can't continue again by 21 gas transmissions of first air outlet, after the air pressure in second cavity 19 was lower than the numerical value of requirement, valve 7 was played band again and is opened, and the gas in second cavity 19 is again by 21 gas transmissions of first air outlet; After the gas in second cavity 19 was higher than the numerical value of requirement, secondary diaphragm 9 drives valve lever 8 to be continued to move down, and the gas in the 3rd cavity 20 is discharged to atmosphere by the aperture in the middle of the valve lever 8, and the air pressure in second cavity 19 comes back to the numerical value of requirement.
In use, behind the pressurized air process air purifying unit that air compressor comes, enter into the suction port of two cavitys of homonymy simultaneously, two cavitys of homonymy are worked simultaneously, gas in the cavity enters in the corresponding cavity in parallel by first passage 16 and second channel 22 respectively, and by first one-way valve 15 and second one-way valve 23 cavity of the left and right sides is independently opened, can not influence the air pressure of right side cavity when making air pressure decline when the left side cavity.
After the air pressure reduction or other loop leakages of suction port, cause first cavity, 18 air pressure to reduce, gas in second cavity 19 is to 18 gas transmissions of first cavity, cause second cavity, 19 internal air pressures to descend, after dropping to certain atmospheric pressure value, gas in valve closing 7, the second cavitys 19 is no longer drained, and keeps certain air pressure.Other circuit's principle are same.
Being adjusted at of cracking pressure of the present invention be preceding, go out being adjusted at of atmospheric pressure after, can guarantee could start to walk after vehicle is higher than certain air pressure, and adjust system pressure as required; Through structural adjustment, form modular product, the installation time that can save car load.
Claims (1)
1, a kind of decompression type four-loop protection valve comprises four independently cavitys, is connected by a valve body between each cavity, connects in the valve body between two cavitys that parallel to be provided with passage, and the place is provided with one-way valve in the passway; Described cavity all is made up of the first pressure regulation end cap, valve body and the second pressure regulation end cap, described valve body is divided into upper cavity and lower chamber with each cavity, is provided with first pressure regulating screw, first spring seat, first pressure adjusting spring, valve plates and primary diaphragm in the upper cavity from top to bottom successively; Be provided with valve lever, secondary diaphragm, second pressure adjusting spring, second spring seat and second pressure regulating screw in the lower chamber from top to bottom successively, also be provided with valve on the top of valve lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101137444A CN100510491C (en) | 2007-09-07 | 2007-09-07 | Decompression type four-loop protection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101137444A CN100510491C (en) | 2007-09-07 | 2007-09-07 | Decompression type four-loop protection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101126466A CN101126466A (en) | 2008-02-20 |
| CN100510491C true CN100510491C (en) | 2009-07-08 |
Family
ID=39094558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101137444A Expired - Fee Related CN100510491C (en) | 2007-09-07 | 2007-09-07 | Decompression type four-loop protection valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100510491C (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3275380A (en) * | 1965-10-23 | 1966-09-27 | Westinghouse Air Brake Co | Combined dynamic and fluid pressure brake system for railway vehicles |
-
2007
- 2007-09-07 CN CNB2007101137444A patent/CN100510491C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3275380A (en) * | 1965-10-23 | 1966-09-27 | Westinghouse Air Brake Co | Combined dynamic and fluid pressure brake system for railway vehicles |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101126466A (en) | 2008-02-20 |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090708 Termination date: 20120907 |