CN204674564U - A kind of novel four-loop protection valve assembly - Google Patents
A kind of novel four-loop protection valve assembly Download PDFInfo
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- CN204674564U CN204674564U CN201420865328.5U CN201420865328U CN204674564U CN 204674564 U CN204674564 U CN 204674564U CN 201420865328 U CN201420865328 U CN 201420865328U CN 204674564 U CN204674564 U CN 204674564U
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- spring
- air extractor
- extractor duct
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Abstract
A kind of novel four-loop protection valve assembly, valve body is provided with EG valve in (1), EG valve comprises piston (10), piston (10) is located in plunger shaft, the top of plunger shaft and air extractor duct I (H) conducting, the external wall of upper portion of piston (10) is embedded with seal ring, piston (10) bottom is provided with the spring perch of indent, piston wall on the spring perch of indent is provided with aperture (f), spring perch is provided with spring (12), spring (12) heads on piston (10), middle part and the air extractor duct III (D) of plunger shaft (14) are provided with passage (a), passage (a) place of the inwall of plunger shaft (14) is provided with seal groove, seal groove is provided with O shape circle (11), valve body (1) is provided with exhausr port (F), plunger shaft below passage (a) is provided with the exhaust passage (b) leading to exhausr port (F).The utility model can realize vehicle when main car braking failure, and emergency brake starts automatically, thus ensures the brake safe of vehicle.
Description
Technical field
The utility model belongs to auto manufacturing's technical field, relates to a kind of vehicular spare parts, particularly a kind of four-loop protection valve assembly.
Background technology
Four-loop protection valve is used in multiloop air braking system, and when after a wherein partial failure, still can ensure there is certain safety arrestment air pressure in other loop, four air extractor ducts are independent separately, can control back axle, propons, parking and trailer and auxiliary air passage respectively.If 21 loops (controlling back axle braking) lost efficacy; then vehicle driving braking function will lose efficacy; because the four-loop protection valve loop that can ensure not lose efficacy also exists certain safety arrestment air pressure, hand brake valve is pulled to carry out emergency braking so driver can adopt.If car is service brake partial failure when descending, driver is in emergency circumstances difficult to expect pulling hand brake valve to brake at this, so often causes safety misadventure.
Utility model content
The purpose of this utility model is exactly overcome above-mentioned deficiency, provides a kind of novel four-loop protection valve assembly structure, automatically can realize emergency braking under air extractor duct H failure conditions.
The technical scheme that the technical matters that the utility model solves adopts is:
A kind of novel four-loop protection valve assembly, comprise valve body 1, valve body 1 is provided with admission port A, air extractor duct I H, air extractor duct II C, air extractor duct III D and air extractor duct IV E, air extractor duct I H, air extractor duct II C, air extractor duct III D is connected with corresponding valve assembly respectively with air extractor duct IV E, it is characterized in that being provided with EG valve in valve body 1, EG valve comprises piston 10, piston 10 is located in plunger shaft, the top of plunger shaft and air extractor duct I H conducting, the external wall of upper portion of piston 10 is embedded with seal ring, the spring perch of indent is provided with bottom piston 10, piston wall on the spring perch of indent is provided with aperture f, spring perch is provided with spring 12, spring 12 heads on piston 10, middle part and air extractor duct III D of plunger shaft 14 are provided with passage a, the passage a place of the inwall of plunger shaft 14 is provided with seal groove, seal groove is provided with O shape circle 11, valve body 1 is provided with exhausr port F, plunger shaft below passage a is provided with the exhaust passage b leading to exhausr port F.
When driving a vehicle, the air that H exports enters the top of EG valve piston from passage k, along with pressure slowly raises, thus overcome the pre-force adjustment of the spring of EG valve, promotes EG valve piston and moves down, and makes aperture f cross O shape circle and loop seals is lived.When leakage situation occurs in 21 loops time, H delivery pressure slowly reduces, thus EG valve spring heads on EG valve piston moves up, when H pressure drops to a preset value, aperture f crosses O shape circle, and at this moment the air in 23 loops from aperture f drainage, and will enter air by exhausr port 3.Because D connects emergency braking loop, when D pressure drop is to certain value, the spring brake chamber namely emergency braking that will play a role will start automatically.
The pressure of the utility model D declines together along with the pressure drop of H after certain numerical value.The effect of this function is, when H inefficacy Ji Zhu garage car brake circuit lost efficacy, D loop and emergency brake function can start (active emergency braking) automatically, thus ensured the brake safe of vehicle.
During concrete enforcement, spring 12 has set screw 13.With the preset value that set screw regulates H pressure to drop to.
During concrete enforcement, valve assembly comprises upper cover 4, spring lower seat and the spring seat of honour 6 is provided with in upper cover 4, pressure spring 5 is between spring lower seat and the spring seat of honour 6, being provided with pressure regulating screw 9 withstands on above spring lower seat through upper cover 4, the spring seat of honour 6 has diaphragm 7, and diaphragm 7 has valve 2 and Y-shaped ring 3.
The beneficial effects of the utility model are: the utility model can realize vehicle and lose in main car braking
When effect, emergency brake starts automatically, thus ensures the brake safe of vehicle.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, utility model is further illustrated.
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the structure for amplifying schematic diagram at the I place of the utility model embodiment Fig. 1.
In figure: 1, valve body 2, valve 3, Y-shaped ring 4, upper cover 5, pressure spring 6, the spring seat of honour 7, diaphragm 8, spring lower seat 9, pressure regulating screw 10, piston 11, O shape circle 12, spring 13, set screw 14, plunger shaft.
Detailed description of the invention
As shown in Figure 1 to Figure 2, a kind of novel four-loop protection valve assembly, comprise valve body 1, valve body 1 is provided with admission port A, air extractor duct I H, air extractor duct II C, air extractor duct III D and air extractor duct IV E, air extractor duct I H, air extractor duct II C, air extractor duct III D is connected with corresponding valve assembly respectively with air extractor duct IV E, valve assembly towards air extractor duct I H and air extractor duct III D is positioned at same one end, valve assembly towards air extractor duct II C and air extractor duct IV E is positioned at corresponding other one end, valve assembly comprises upper cover 4, spring lower seat 8 and the spring seat of honour 6 is provided with in upper cover 4, pressure spring 5 is between spring lower seat and the spring seat of honour 6, being provided with pressure regulating screw 9 withstands on above spring lower seat through upper cover 4, the spring seat of honour 6 has diaphragm 7, diaphragm 7 has valve 2 and Y-shaped ring 3, valve 2 wall towards the valve assembly position of air extractor duct I H is provided with pore d, EG valve is provided with in valve body 1, EG valve comprises piston 10, piston 10 is located in plunger shaft, the top of plunger shaft and air extractor duct I H conducting, the external wall of upper portion of piston 10 is embedded with seal ring, the spring perch of indent is provided with bottom piston 10, piston wall on the spring perch of indent is provided with aperture f, spring perch is provided with spring 12, spring 12 heads on piston 10, spring 12 has set screw 13.With the preset value that set screw 13 regulates H pressure to drop to, middle part and air extractor duct III D of plunger shaft 14 are provided with passage a, the passage a place of the inwall of plunger shaft 14 is provided with seal groove, seal groove is provided with O shape circle 11, valve body 1 is provided with exhausr port F, and the plunger shaft below passage a is provided with the exhaust passage b leading to exhausr port F.
When driving a vehicle, the air that H exports enters the top of EG valve piston 10 from passage k, along with pressure slowly raises, thus overcome the pre-force adjustment of the spring 12 of EG valve, promotes EG valve piston 10 and moves down, and makes aperture f cross O shape circle 11 and loop seals is lived.In time there is leakage situation in air extractor duct I H loop, air extractor duct I H delivery pressure slowly reduces, thus EG valve spring 12 heads on EG valve piston 10 moves up, when H pressure drops to a preset value, aperture f crosses O shape circle 11, at this moment the air in 23 loops from aperture f drainage, and will enter air by exhausr port 3.Because D connects emergency braking loop, when D pressure drop is to certain value, the spring brake chamber namely emergency braking that will play a role will start automatically.
Specific works process is: as Fig. 1 and Fig. 2, pressurized air from dryer enters A chamber and B chamber by A, and sets up pressure 7 times at diaphragm, just can back down Y-shaped ring 3 when gas is at 0.1MPa, then along pore d, the first and second loops of automobile are exported to through air extractor duct 21,22.As long as this can ensure that Air compressor also provides source of the gas slowly in slow running, so gas just slowly can be given in 21,22 loops.When air pressure continues raise and overcome the predetermined force of pressure spring 5, with regard to jack-up diaphragm 7, air pressure is exported to the third and fourth loop of automobile through air extractor duct III D and air extractor duct IV E by B chamber.
When a partial failure, such as second servo loop lost efficacy, and the pressure at air extractor duct II C place constantly declines due to leakage.Because now four valves are all in open mode, the gas in its excess-three loop constantly supplements to second servo loop, makes air pressure along with declining together.After each loop air pressure is down to the response pressure in 22 loops, pressure can decline with source of the gas partial pressure and decline further, until reach the shutoff pressure in inefficacy loop.After bleed pressure is down to the shutoff pressure in 22 loops, the diaphragm in 22 loops can be shut, and the air pressure of source of the gas will no longer by 22 loop drainage, thus can, to all the other each loop air feed again, make pressure rise to the response pressure in 22 loops.Afterwards, if the gassing rate of source of the gas is still lower than the deflation rate in 22 loops, then because the diaphragm in 22 loops is opened again, come back to foregoing stress-relief process, all the other circuit pressures outside 2 loops will remain on reciprocally swinging between the shutoff pressure in 2 loops and response pressure.Its cocircuit still can keep normal safety arrestment air pressure, and is constantly supplemented.Thus travel safety is greatly improved.
When driving a vehicle, the air that air extractor duct I H exports enters the bottom of EG valve piston 10 from passage k, along with pressure slowly raises, thus overcome the pre-force adjustment of EG valve spring 12, promote EG valve piston 10 to move down, make aperture f cross O type circle 11 and loop seals is lived.In time there is leakage situation in 21 loops, air extractor duct I H delivery pressure slowly reduces, thus EG valve spring 12 heads on EG valve piston 10 moves up, when air extractor duct I H pressure drops to a preset value (can regulate by set screw 13), aperture f crosses O type circle 11, at this moment the air in 23 loops from aperture f drainage, and will enter air by exhausr port 3.Because air extractor duct III D connects emergency braking loop, when air extractor duct III D pressure drop is to certain value, the spring brake chamber namely emergency braking that will play a role will start automatically.
Finally, it is also to be noted that what enumerate above is only specific embodiment of the utility model.Obviously, the utility model is not limited to above embodiment, can also have many distortion.All distortion that those of ordinary skill in the art can directly derive from disclosed content of the present utility model or associate, all should think protection domain of the present utility model.
Claims (3)
1. a novel four-loop protection valve assembly, comprise valve body (1), valve body (1) is provided with admission port (A), air extractor duct I (H), air extractor duct II (C), air extractor duct III (D) and air extractor duct IV (E), air extractor duct I (H), air extractor duct II (C), air extractor duct III (D) is connected with corresponding valve assembly respectively with air extractor duct IV (E), it is characterized in that being provided with EG valve in valve body (1), EG valve comprises piston (10), piston (10) is located in plunger shaft, the top of plunger shaft and air extractor duct I (H) conducting, the external wall of upper portion of piston (10) is embedded with seal ring, piston (10) bottom is provided with the spring perch of indent, piston wall on the spring perch of indent is provided with aperture (f), spring perch is provided with spring (12), spring (12) heads on piston (10), middle part and the air extractor duct III (D) of plunger shaft (14) are provided with passage (a), passage (a) place of the inwall of plunger shaft (14) is provided with seal groove, seal groove is provided with O shape circle (11), valve body (1) is provided with exhausr port (F), plunger shaft below passage (a) is provided with the exhaust passage (b) leading to exhausr port (F).
2. the novel four-loop protection valve assembly of one according to claim 1, is characterized in that spring (12) has set screw (13).
3. the novel four-loop protection valve assembly of one according to claim 1 and 2; it is characterized in that valve assembly comprises upper cover (4); spring lower seat and the spring seat of honour (6) are provided with in upper cover (4); pressure spring (5) is positioned between spring lower seat and the spring seat of honour (6); being provided with pressure regulating screw (9) withstands on above spring lower seat through upper cover (4); the spring seat of honour (6) has diaphragm (7), and diaphragm (7) has valve (2) and Y-shaped ring (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420865328.5U CN204674564U (en) | 2014-12-30 | 2014-12-30 | A kind of novel four-loop protection valve assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420865328.5U CN204674564U (en) | 2014-12-30 | 2014-12-30 | A kind of novel four-loop protection valve assembly |
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| Publication Number | Publication Date |
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| CN204674564U true CN204674564U (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420865328.5U Active CN204674564U (en) | 2014-12-30 | 2014-12-30 | A kind of novel four-loop protection valve assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111907506A (en) * | 2020-08-18 | 2020-11-10 | 湖北力美制动元件有限公司 | Multi-loop protection valve for automobile braking system |
-
2014
- 2014-12-30 CN CN201420865328.5U patent/CN204674564U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111907506A (en) * | 2020-08-18 | 2020-11-10 | 湖北力美制动元件有限公司 | Multi-loop protection valve for automobile braking system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |