CN114294453A - Plate-connected relief valve with overflow function for railway vehicle - Google Patents
Plate-connected relief valve with overflow function for railway vehicle Download PDFInfo
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- CN114294453A CN114294453A CN202111652901.5A CN202111652901A CN114294453A CN 114294453 A CN114294453 A CN 114294453A CN 202111652901 A CN202111652901 A CN 202111652901A CN 114294453 A CN114294453 A CN 114294453A
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- valve
- valve body
- plate
- ejector rod
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- 238000004073 vulcanization Methods 0.000 claims abstract description 18
- 210000004907 gland Anatomy 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 16
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 abstract description 2
- 230000006837 decompression Effects 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- -1 polytetrafluoroethylene structure Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses a plate-connected relief valve with an overflow function for a railway vehicle, which comprises a gland, an ejector rod, a valve body, an air inlet, an output port, an exhaust port and the like; a valve vulcanization component and a valve seat are sequentially arranged in the valve body; the inner part of the ejector rod is axially communicated and forms a channel, one end of the ejector rod is connected with the valve seat, and the other end of the ejector rod is connected with the gland; the air inlet is communicated with the lower end surface of the valve vulcanization assembly and the cavity inside the valve body; the output port is communicated with the cavity in the valve body; the exhaust port is arranged at the side end of the upper cover and communicated with the internal channel of the ejector rod. The invention can reduce the upstream air pressure according to the actual requirement, and meanwhile, when the downstream air pressure is overlarge, the downstream air pressure can overflow to the atmosphere through the pressure reducing valve, thereby preventing the downstream pressure from continuously increasing. The pressure reducing valve has an overflow function, can meet the plate connection requirement, can simplify parts of the rail vehicle braking system in the rail vehicle braking system, does not need an additional pipe-mounted air passage, and can realize corresponding functions in the rail vehicle braking system.
Description
Technical Field
The invention belongs to the field of plate-connected pressure reducing valves, and particularly relates to a plate-connected pressure reducing valve with an overflow function for a railway vehicle.
Background
Traditional relief pressure valve adopts traditional piston structure, and the piston can lead to viscosity great because of the rubber spare exceeds between time and the valve body, and influences the decompression effect, and can't overflow low reaches gas, leads to unable the getting rid of when the low reaches atmospheric pressure is too high, and keeps high atmospheric pressure to damage low reaches gas for a long time. The traditional pressure reducing valve has the risk of rupture of the membrane due to excessive local stress on the membrane caused by pressure reducing movement under high air pressure.
The pressure reducing valve in the prior art has the pressure reducing function that air enters the lower end face of the vulcanizing assembly through the output port, pressure adjustment is carried out through upper and lower air pressure difference, the middle transition sealing ring is cut off from the input port, the adopted overflow is realized by applying downstream air pressure to the piston to enable the piston to move upwards to exhaust forcibly, sealing is realized through a rubber piece on the piston when sealing is needed, the piston passes through during overflow, a sealing surface is arranged on the piston, dislocation is generated when resetting is caused, and the defects of unsmooth stopping and the like after overflow are caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a plate-connected relief valve with an overflow function for a railway vehicle, which can reduce upstream air pressure according to actual requirements, and can overflow to the atmosphere through the relief valve when the downstream air pressure is overlarge so as to prevent the downstream pressure from continuously increasing. The pressure reducing valve has an overflow function, can meet the plate connection requirement, can simplify parts of the rail vehicle braking system in the rail vehicle braking system, does not need an additional pipe-mounted air passage, and can realize corresponding functions in the rail vehicle braking system.
The purpose of the invention is realized by the following technical scheme: a plate-connected pressure reducing valve with an overflow function for a railway vehicle is characterized by comprising an adjusting screw, a spring seat, a compression spring, an upper cover, a gland, a rubber diaphragm, a mandril, a valve seat, a valve vulcanization assembly, a valve body, an air inlet, an output port and an air outlet;
the valve body is sequentially provided with a valve vulcanization component and a valve seat; the inner part of the ejector rod is axially communicated and forms a channel, one end of the ejector rod is connected with the valve seat, the other end of the ejector rod is connected with the gland, a rubber diaphragm is arranged between the ejector rod and the gland, and an inner cavity is formed between the lower end of the rubber diaphragm and the valve body;
a compression spring and a spring seat are sequentially arranged on the pressure cover, an upper cover is arranged on the pressure cover, an adjusting screw is arranged on the upper cover, and the adjusting screw abuts against the spring seat;
the air inlet and the output port are both arranged at the bottom of the valve body, and the air inlet is communicated with the lower end face of the valve vulcanization assembly and the inner cavity at the lower end of the rubber diaphragm; the output port is communicated with an internal cavity at the lower end of the rubber diaphragm; the exhaust port is formed in the side end of the upper cover and communicated with the inner channel of the ejector rod.
Furthermore, a return spring is installed between the valve vulcanization assembly and the valve body.
Further, the riveting cylindrical pin at the bottom of the valve body is used for preventing errors during assembly.
Furthermore, an O-shaped ring groove is formed in the end face of the valve body for placing an O-shaped ring.
Further, the upper cover and the valve body are fastened through threaded connection.
Further, a sealing ring with a protection function is placed on the rubber diaphragm.
Further, the sealing ring adopts a polytetrafluoroethylene structure.
Furthermore, the upper cover is arranged in the steel wire thread insert and is in threaded connection with the adjusting screw, and the hexagonal thin nut is arranged between the adjusting screw and the steel wire thread insert to prevent the adjusting screw from loosening.
Furthermore, a plurality of flow guide holes are designed on the side edge of the valve seat, and the air inlet is communicated with the inner cavity at the lower end of the rubber diaphragm through a gap between the valve seat and the valve body and the flow guide holes.
The invention has the beneficial effects that:
1. the plate type installation and the modularization of the pressure reducing valve are convenient for the arrangement of vehicle pipelines, and the waste of gas circuits is reduced.
2. The pressure reducing valve has an overflow function, is integrated and saves cost.
3. The relief pressure valve designs into rubber diaphragm structure, and the precision is more sensitive, designs the pressure disk simultaneously in rubber diaphragm department, hugs closely rubber diaphragm through the big terminal surface of pressure disk, avoids because atmospheric pressure leads to cracked risk because drag in the motion process.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from a single embodiment of the invention without inventive step, are within the scope of the invention.
As shown in fig. 1, the plate-connected relief valve with the overflow function for the rail vehicle provided by the invention is characterized by comprising an adjusting screw 1, a hexagonal thin nut 2, a steel wire thread insert 3, a spring seat 4, a compression spring 5, an upper cover 6, a sealing ring 7, a gland 8, a rubber diaphragm 9, a push rod 10, an O-shaped ring 11, a valve seat 12, a valve vulcanization component 13, a return spring 14, a valve body 15, a cylindrical pin 16, an air inlet 17, an output port 18 and an air outlet 19;
a return spring 14, a valve vulcanization assembly 13 and a valve seat 12 are sequentially arranged in the valve body 15, a plurality of flow guide holes are formed in the side edge of the valve seat 12, a cylindrical pin 16 is riveted at the bottom of the valve body 15 to prevent errors during assembly, and an O-shaped ring groove is formed in the end face of the valve body 15 and used for placing an O-shaped ring to play a role in installation and sealing to prevent leakage;
the inner part of the ejector rod 10 is axially communicated and forms a channel, one end of the ejector rod is in threaded connection with the valve seat 12 to form a combined part, and the other end of the ejector rod is in threaded connection and fixation with the middle threaded hole of the gland 8. In order to simplify the design structure and the functional reliability, a rubber diaphragm 9 is designed between the ejector rod 10 and the gland 8, and the rubber diaphragm 9 can guide the movement of the ejector rod 10 and can also play a role in internal sealing. An inner cavity is formed between the lower end of the rubber diaphragm 9 and the valve body.
A compression spring 5 and a spring seat 4 are sequentially arranged on the gland 8, an upper cover 6 is installed, and the upper cover 6 and the valve body 15 are fastened through threaded connection; the sealing ring 7 is arranged on the rubber diaphragm 9, and the sealing ring 7 is of a polytetrafluoroethylene structure, so that the rubber diaphragm sealing device has the advantages of high lubricity and good sealing effect. In order to prevent the upper cover from biting and tearing the rubber diaphragm 9 in the rotating process, a sealing ring 7 is required to be placed to protect the rubber diaphragm 9.
The upper cover 6 is arranged in the steel wire thread insert 3 and is in threaded connection with the adjusting screw 1, the adjusting screw 1 is propped against the spring seat 4, and the steel wire thread insert 3 can increase the thread strength; a hexagonal thin nut 2 is arranged between the adjusting screw 1 and the steel wire thread insert 3 to prevent the adjusting screw from loosening.
The air inlet 17 and the output port 18 are both arranged at the bottom of the valve body 15, and the air inlet 17 is communicated with the lower end face of the valve vulcanization assembly 13 and an inner cavity at the lower end of the rubber diaphragm 9. The outlet 18 communicates with an internal cavity at the lower end of the rubber diaphragm 9. The exhaust port 19 is arranged at the side end of the upper cover 6 and communicated with the internal channel of the mandril 10.
The invention realizes the modes of pressure reduction and overflow as follows:
1) and (3) reducing pressure: due to the pressure reducing valve, the internal overall pressure is: when the intake pressure is kept unchanged, the decompression spring force is adjusted, and the input pressure minus the spring force is the output pressure after decompression.
2) Overflowing: after the spring force is fixed, the actually required pressure after pressure reduction is also fixed, and when the output pressure is higher than the actually required pressure after pressure reduction, the part with higher output port pressure is discharged through the exhaust port until the outlet pressure is reduced to the actually required pressure after pressure reduction.
The specific process of the invention for realizing decompression and overflow is as follows
And (3) a pressure reduction function: the air inlet 17 divides the air into two paths, and one path of air acts on the lower plane of the valve vulcanization assembly 13 to make the valve vulcanization assembly 13 move upwards; the other path of gas is slowly output to the inner cavity at the lower end of the rubber diaphragm 9 through the gap between the valve seat 12 and the valve body 15 and the side diversion hole of the valve seat 12, so that the rubber diaphragm 9 has the tendency of moving upwards and simultaneously outputs the pressure to the output port 18. As the air pressure acting on the lower end of the rubber diaphragm 9 gradually increases, the rubber diaphragm 9 will move upward together with the push rod 10 and the gland 8 against the spring force generated by the compression spring 5, and at the same time the valve vulcanization assembly 13 will move upward following the upward movement of the push rod 10. When the valve vulcanization component 13 contacts with the valve port at the valve seat 12, the valve port is closed, namely the output pressure is equal to the input pressure-spring force, and the output pressure is equal to the actual pressure after decompression, so that the setting pressure applied to the compression spring 5 by the spring seat 4 can be changed by adjusting the adjusting screw 1 and increasing or decreasing the screwing depth into the upper cover 6 so as to obtain the desired output pressure. When the intended decompression function is achieved, the hexagonal thin nut 2 needs to be tightened in order to prevent the adjustment screw 1 from loosening.
And (4) an overflow function: when the pressure of the output port 18 is greater than the pressure after actual required decompression, the acting force of the air pressure acting on the lower end face of the rubber diaphragm 9 is greater than the spring force, at the moment, the rubber diaphragm 9 drives the ejector rod 10 and the valve vulcanization assembly 13 to be separated, at the moment, the air pressure of the output port 18 flows along with the internal channel of the ejector rod 10 and is exhausted to the atmosphere from the exhaust port 19 of the upper cover 6, and the overflow function is achieved.
The above-described embodiments are intended to illustrate rather than to limit the invention, and any modifications and variations of the present invention are within the spirit of the invention and the scope of the appended claims.
Claims (9)
1. A plate-connected relief valve with an overflow function for a railway vehicle is characterized by comprising an adjusting screw (1), a spring seat (4), a compression spring (5), an upper cover (6), a gland (8), a rubber diaphragm (9), a mandril (10), a valve seat (12), a valve vulcanization assembly (13), a valve body (15), an air inlet (17), an output port (18) and an exhaust port (19);
a valve vulcanization component (13) and a valve seat (12) are sequentially arranged in the valve body (15); the inner part of the ejector rod (10) is axially communicated and forms a channel, one end of the ejector rod is connected with the valve seat (12), the other end of the ejector rod is connected with the gland (8), a rubber diaphragm (9) is arranged between the ejector rod (10) and the gland (8), and an inner cavity is formed between the lower end of the rubber diaphragm (9) and the valve body (15);
a compression spring (5) and a spring seat (4) are sequentially arranged on the gland (8), an upper cover (6) is installed, an adjusting screw (1) is installed on the upper cover (6), and the adjusting screw (1) abuts against the spring seat (4);
the air inlet (17) and the output port (18) are both arranged at the bottom of the valve body (15), and the air inlet (17) is communicated with the lower end face of the valve vulcanization assembly (13) and an internal cavity at the lower end of the rubber diaphragm (9); the output port (18) is communicated with an inner cavity at the lower end of the rubber diaphragm 9; the exhaust port (19) is arranged at the side end of the upper cover (6) and is communicated with the internal channel of the ejector rod (10).
2. A plate-connected relief valve with relief function for railway vehicles according to claim 1, characterized in that a return spring (14) is installed between said valve vulcanization assembly (13) and valve body (15).
3. A plate-connected relief valve with relief function for rail vehicles according to claim 1, characterized in that the riveting cylindrical pin (16) at the bottom of the valve body (15) is used for error proofing during assembly.
4. A plate-connected relief valve with overflow function for railway vehicles according to claim 1, characterized in that the valve body (15) is provided with an O-ring groove on its end face for placing the O-ring (11).
5. A plate-connected relief valve with overflow function for railway vehicles according to claim 1, characterized in that the upper cover (6) and the valve body (15) are fastened by screw connection.
6. A plate-connected relief valve with overflow function for railway vehicles according to claim 1, characterized in that a protective sealing ring (7) is placed on said rubber diaphragm (9).
7. A plate-connected relief valve with overflow function for railway vehicles according to claim 6, characterized in that the sealing ring (7) is made of PTFE.
8. The plate-connected relief valve with overflow function for railway vehicles according to claim 1, characterized in that the upper cover (6) is installed into the wire thread insert (3) and is in threaded connection with the adjusting screw (1), and a hexagonal thin nut (2) is installed between the adjusting screw (1) and the wire thread insert (3) to prevent the adjusting screw (1) from loosening.
9. The plate-connected relief valve with overflow function for railway vehicles according to claim 1, characterized in that the side of the valve seat (12) is designed with a plurality of flow guiding holes, and the air inlet (17) is communicated with the inner cavity at the lower end of the rubber diaphragm (9) through the gap between the valve seat (12) and the valve body (15) and the flow guiding holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111652901.5A CN114294453A (en) | 2021-12-30 | 2021-12-30 | Plate-connected relief valve with overflow function for railway vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111652901.5A CN114294453A (en) | 2021-12-30 | 2021-12-30 | Plate-connected relief valve with overflow function for railway vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114294453A true CN114294453A (en) | 2022-04-08 |
Family
ID=80973780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111652901.5A Pending CN114294453A (en) | 2021-12-30 | 2021-12-30 | Plate-connected relief valve with overflow function for railway vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114294453A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008149565A1 (en) * | 2007-06-05 | 2008-12-11 | Koganei Corporation | Pressure reducing valve |
| KR20100003684U (en) * | 2008-09-29 | 2010-04-07 | 전흔수 | Reducing valve installed a bleed room |
| CN201502761U (en) * | 2009-08-14 | 2010-06-09 | 宜宾三江机械有限责任公司 | Pressure reducing valve with composite valve |
| JP2014167327A (en) * | 2013-02-28 | 2014-09-11 | Kayaba Ind Co Ltd | Differential pressure valve |
| CN204900967U (en) * | 2015-08-04 | 2015-12-23 | 北京精密机电控制设备研究所 | Highly reliable relief pressure valve with adjustable spool stroke |
| CN107061810A (en) * | 2017-06-27 | 2017-08-18 | 眉山中车制动科技股份有限公司 | A kind of overflow-type pressure-reducing valve with minimum operating pressures that |
| CN110486515A (en) * | 2018-05-14 | 2019-11-22 | 新乡航空工业(集团)有限公司 | Motor vehicle braking system and its pressure regulator valve, vehicle |
| CN112361049A (en) * | 2020-10-15 | 2021-02-12 | 中车山东机车车辆有限公司 | Pressure regulating valve of railway wagon |
| CN213871273U (en) * | 2020-11-05 | 2021-08-03 | 上海舜华新能源系统有限公司 | Piston lifting type pressure reducing valve |
-
2021
- 2021-12-30 CN CN202111652901.5A patent/CN114294453A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008149565A1 (en) * | 2007-06-05 | 2008-12-11 | Koganei Corporation | Pressure reducing valve |
| KR20100003684U (en) * | 2008-09-29 | 2010-04-07 | 전흔수 | Reducing valve installed a bleed room |
| CN201502761U (en) * | 2009-08-14 | 2010-06-09 | 宜宾三江机械有限责任公司 | Pressure reducing valve with composite valve |
| JP2014167327A (en) * | 2013-02-28 | 2014-09-11 | Kayaba Ind Co Ltd | Differential pressure valve |
| CN204900967U (en) * | 2015-08-04 | 2015-12-23 | 北京精密机电控制设备研究所 | Highly reliable relief pressure valve with adjustable spool stroke |
| CN107061810A (en) * | 2017-06-27 | 2017-08-18 | 眉山中车制动科技股份有限公司 | A kind of overflow-type pressure-reducing valve with minimum operating pressures that |
| CN110486515A (en) * | 2018-05-14 | 2019-11-22 | 新乡航空工业(集团)有限公司 | Motor vehicle braking system and its pressure regulator valve, vehicle |
| CN112361049A (en) * | 2020-10-15 | 2021-02-12 | 中车山东机车车辆有限公司 | Pressure regulating valve of railway wagon |
| CN213871273U (en) * | 2020-11-05 | 2021-08-03 | 上海舜华新能源系统有限公司 | Piston lifting type pressure reducing valve |
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