CN204553955U - Relief valve - Google Patents
Relief valve Download PDFInfo
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- CN204553955U CN204553955U CN201420797312.5U CN201420797312U CN204553955U CN 204553955 U CN204553955 U CN 204553955U CN 201420797312 U CN201420797312 U CN 201420797312U CN 204553955 U CN204553955 U CN 204553955U
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- relief valve
- core assembly
- mangetic core
- air outlet
- valve according
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Abstract
The utility model relates to a kind of relief valve, comprises housing, is formed with valve seat in described housing; Be arranged on the inlet hole in described housing and air outlet hole; Mangetic core assembly, the exercisable and described valve seat of described mangetic core assembly against be separated, to be communicated with or to disconnect described inlet hole and air outlet hole; Spring, to be arranged in described housing and to be pressed against on described valve seat by described mangetic core assembly.
Description
Technical field
The utility model relates to rail vehicle braking field, particularly a kind of relief valve for rail transit car braking system.
Background technique
Relief valve has extensive use in rail transit car braking system, is mainly used in pilot line downstream pressure, and when incoming pressure exceedes setting value, relief valve is opened, by relief valve to downstream air feed.When incoming pressure is lower than setting value, valve can reset in sensitive reliable cut out, the empty spring air feed in preferential guarantee relief valve downstream.
Publication number is CN 202545910 U, and the Chinese utility model patent that name is called " a kind of relief valve " discloses a kind of relief valve, sees Fig. 1.This relief valve regulates the flow of fluid by adjustment swivel nut 102, adjustment relation between spring 106 and diaphragm 104.The shortcoming that this relief valve easily exists is: require higher to operating environment, when exposed guide rod 107 surface play the guiding role in an atmosphere is polluted, or when the foreign matters such as the dust granule in air enter into the gap between adjustment swivel nut 102 and guide rod 107, the surface friction drag causing guide rod 107 to move up and down is strengthened, thus form guide rod 107 clamping stagnation or eccentric wear phenomenon, have a strong impact on cracking pressure value and the closing pressure value of relief valve.After the metallic dust produced when the impurity foreign matter in air and guide rod 107 eccentric wear enters valve body, corrosion can be caused to the diaphragm 105 of relief valve, affect the tightness of relief valve.To remove above-mentioned impurity foreign matter, can only disassemble relief valve, carrying out cleaning or changing to corresponding component, thus make troubles to the maintenance of relief valve.Therefore this relief valve exists and requires the defects such as high, the repair cycle is short, easy leakage, working value are unreliable to Environmental Conditions.
Along with the universal development of track traffic, the application of relief valve in rail transit car braking system is also had higher requirement along with the change of car operation environment, especially, when in the face of rugged environment such as airborne dust sandstorm, low temperature sleet, high temperature are damp and hot, common relief valve has been difficult to meet real vehicle Operational requirements.
Model utility content
The variable effect of objective environment, for the operating environment of rail traffic vehicles complexity, is down to minimum by this patent, thus improves the performance of relief valve, extends turn(a)round, reduces maintenance, operation cost.
For the problems referred to above, the utility model provides a kind of relief valve, comprises housing, is formed with valve seat in described housing; Be arranged on the inlet hole in described housing and air outlet hole; Mangetic core assembly, the exercisable and described valve seat of described mangetic core assembly against be separated, to be communicated with or to disconnect described inlet hole and air outlet hole; Spring, to be arranged in described housing and to be pressed against on described valve seat by described mangetic core assembly.
According to an aspect of the present utility model, described inlet hole and described air outlet hole are positioned at the same side of described mangetic core assembly.
According to an aspect of the present utility model, described inlet hole and in described air outlet hole are relative with the center of described mangetic core assembly, and described inlet hole is relative with the edge of described mangetic core assembly with another in described air outlet hole.
According to an aspect of the present utility model, described spring is pressed against described mangetic core assembly by lower spring cup.
According to an aspect of the present utility model, described housing is provided with adjustment screw, one end contrary with described lower spring cup of described spring is provided with upper spring seat, and one end of adjustment screw is resisted against on described upper spring seat to adjust the decrement of described spring.
According to an aspect of the present utility model, described mangetic core assembly is the folder cloth lamina membranacea that elastic material is made.
According to an aspect of the present utility model, between described adjustment screw and upper spring seat, be provided with automatic capturing structure.
According to an aspect of the present utility model, be also provided with limited part in described housing, limit the moving range of described mangetic core assembly.
According to an aspect of the present utility model, the edge of described inlet hole and air outlet hole is provided with pressure flow to instruction.
According to the utility model, owing to eliminating the guide rod being positioned at outside of prior art, the foreign matters such as dust granule effectively can be avoided to enter relief valve interior surface and to cause the problems such as wearing and tearing, clamping stagnation, eccentric wear, effective tightness safeguarding relief valve, reduce the requirement for Environmental Conditions, extend the repair cycle.
Accompanying drawing explanation
Below, will be described in more detail preferred implementation of the present utility model by reference to the accompanying drawings, wherein:
Fig. 1 is the sectional view of a kind of relief valve of prior art;
Fig. 2 is the sectional view of the relief valve according to an embodiment of the present utility model;
Fig. 3 is the sectional view of the relief valve according to an embodiment of the present utility model.
Embodiment
For making the object of the utility model embodiment, technological scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Mention in detailed description below " on " D score " left side " " right side ", be described with reference to the direction in accompanying drawing, those of ordinary skill in the art can know and understand its implication.
Below with reference to Fig. 2 and Fig. 3, the relief valve according to embodiment of the present utility model is described.Fig. 2 is the sectional view of the relief valve according to an embodiment of the present utility model; Fig. 3 is the sectional view of the relief valve according to an embodiment of the present utility model.
As shown in Figure 2, housing is comprised according to the relief valve 20 of the utility model embodiment.Housing shown in Fig. 2 comprises upper shell 4 and lower shell body 9, and the two is connected and fixed and holds the miscellaneous part of relief valve 20.Certain the utility model is not limited thereto, and those skilled in the art also can visualize the shell construction using integral type.For upper shell 4 and lower shell body 9, the technical solution of the utility model is described below.
Lower shell body 9 is formed valve port V (valve seat), such as annular projection.Valve port V is provided with mangetic core assembly 8.According to an embodiment of the present utility model, mangetic core assembly 8 is lamina membranacea, the folder cloth lamina membranacea such as having the material with favorable elasticity to make.Certain those of ordinary skill in the art also can conceive the mangetic core assembly 8 using other structures.
Lower shell body 9 is also provided with inlet hole f and air outlet hole g.Inlet hole f and air outlet hole g has mangetic core assembly 8 to keep apart.According to an embodiment of the present utility model, as shown in Figure 2, inlet hole f is relative with the center portion of mangetic core assembly 8, and air outlet hole g is relative with the periphery of mangetic core assembly 8.The utility model is not limited thereto certainly, and those skilled in the art can arrange the position of inlet hole f and air outlet hole g as required, or visualizes other technological schemes of being isolated inlet hole f and air outlet hole g by mangetic core assembly 8.
Inlet hole f and air outlet hole g can be provided with O shape circle, for being tightly connected with exterior line.
As shown in Figure 2, when mangetic core assembly 8 is separated with valve port V, inlet hole f is communicated with air outlet hole g.When mangetic core assembly 8 is resisted against on valve port V, being communicated with between inlet hole f with air outlet hole g is disconnected.
As shown in Figure 2, the top of mangetic core assembly 8 is provided with spring 6.Mangetic core assembly 8 pushes against on valve port V by spring 6.The lower end of lower spring cup 7 for supported spring 6 is optionally provided with between mangetic core assembly 8 and spring 6.
The upper end of spring 6 such as can be arranged in upper shell 4.Cavity can be provided with for holding spring 6 in upper shell 4.Also can comprise adjustment screw 1 in upper shell 4, adjustment screw 1 to screw in the hole of upper shell 4 and inwardly can be screwed into and outwards back-out.The lower end of adjustment screw 1 abuts with upper spring seat 5, and the upper end of spring 6 is arranged on upper spring seat 5.By being screwed into or adjustment screw 1 of back-outing, can the decrement of Regulation spring 6, thus adjustment spring 6 pushes against the pressure of mangetic core assembly 8, also namely adjusts the cracking pressure of relief valve 20.Adjustment screw 1 generally to be coated with and beat locking mark or add lead sealing, prevent from privately adjusting relief valve working value without permission.
Below with reference to Fig. 2, the operation according to the relief valve 20 of the utility model embodiment is described.
The pressurized air that inlet opening A1 enters enters the annular chamber below mangetic core assembly 8 through inlet hole f, as long as the pressure of A1 is lower than selected operating pressure, valve port V keeps closed condition.
When incoming pressure reaches setting value, lamina membranacea 8 is raised after overcoming the active force of spring 6, and lift off a seat V, and pressurized air just flows to exhaust outlet A2 from air outlet hole g.
The upstream pressure of relief valve declines and can cause adverse current, until pressure drop is to closing pressure, and mangetic core assembly 8 close port V under the effect of Compress Spring 6.
Lamina membranacea in mangetic core assembly 8 adopts the folder cloth lamina membranacea of excellent performance, ensure that tensile strength and tear strength, in mangetic core assembly 8 knee-action process, there will not be lamina membranacea to tear phenomenon, thus make relief valve can keep good sealing within the longer cycle.The folder cloth lamina membranacea that this patent adopts the material with favorable elasticity to make seals, such mangetic core assembly would not because of the collision with metal seat valve in knee-action process, cause the damage of valve port, thus make relief valve can keep good sealing within the longer cycle.
Move up and down in process to prevent mangetic core assembly 8 and occur jam, eccentric wear phenomenon, affect the normal opening and closing of relief valve, between pressure regulating screw 1 and upper spring seat 5, have employed automatic capturing structure.
For preventing relief valve from affecting performance index under excess pressure, ensureing spring action within the specific limits, guaranteeing that relief valve working value is reliable and stable, prevent lamina membranacea from tearing, upper moving past in journey, position limitation protection has been carried out to mangetic core assembly 8.
Relief valve lower shell body 9 is carved with pressure flow arrows, prevent pressure introduction port and pressure output anti-loaded.On board-like relief valve lower shell body 9, mounting hole have employed non-symmetry structure design especially, further avoid the error occurring misloading.
The size of relief valve cracking pressure is adjusted by the position adjusting pressure regulating screw 1.
In addition; under excess pressure, its performance index are affected in order to prevent relief valve of the present utility model; ensureing spring action within the specific limits, can limited part (not shown) being set in the housing, for carrying out position limitation protection to mangetic core assembly 8 upper moving past in journey.Like this, can guarantee that relief valve action is reliably uncertain, prevent tearing of mangetic core assembly.
Shown in Fig. 2 is subbase mounted relief valve.Figure 3 shows that the relief valve that tubular type is installed, wherein the structure of relief valve itself is same as shown in Figure 2, repeats no more here.
Above with reference to illustrating exemplary embodiments of the present utility model.Above-described embodiment is only for illustration of the utility model, and be not to restriction of the present utility model, the those of ordinary skill of relevant technical field, when not departing from the utility model scope, can also make a variety of changes and modification, therefore, all equivalent technological schemes also should belong to category disclosed in the utility model.
Claims (11)
1. a relief valve, is characterized in that, comprises
Housing, is formed with valve seat in described housing;
Be arranged on the inlet hole in described housing and air outlet hole;
Mangetic core assembly, the exercisable and described valve seat of described mangetic core assembly against be separated, to be communicated with or to disconnect described inlet hole and air outlet hole;
Spring, to be arranged in described housing and to be pressed against on described valve seat by described mangetic core assembly.
2. relief valve according to claim 1, is characterized in that, described inlet hole and described air outlet hole are positioned at the same side of described mangetic core assembly.
3. relief valve according to claim 1 and 2, is characterized in that, described inlet hole and in described air outlet hole are relative with the center of described mangetic core assembly, and described inlet hole is relative with the edge of described mangetic core assembly with another in described air outlet hole.
4. relief valve according to claim 1 and 2, is characterized in that, described spring is pressed against described mangetic core assembly by lower spring cup.
5. relief valve according to claim 4, it is characterized in that, described housing is provided with adjustment screw, one end contrary with described lower spring cup of described spring is provided with upper spring seat, and one end of adjustment screw is resisted against on described upper spring seat to adjust the decrement of described spring.
6. relief valve according to claim 1 and 2, is characterized in that, described mangetic core assembly is the folder cloth lamina membranacea that elastic material is made.
7. relief valve according to claim 5, is characterized in that, is provided with automatic capturing structure between described adjustment screw and described upper spring seat.
8. relief valve according to claim 1 and 2, is characterized in that, is also provided with limited part in described housing, limits the moving range of described mangetic core assembly.
9. relief valve according to claim 1 and 2, is characterized in that, the edge of described inlet hole and air outlet hole is provided with pressure flow to instruction.
10. relief valve according to claim 5, is characterized in that, described adjustment screw is applied with locking mark or lead sealing.
11. relief valves according to claim 1 and 2, is characterized in that, described mangetic core assembly is positioned at described enclosure interior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420797312.5U CN204553955U (en) | 2014-12-15 | 2014-12-15 | Relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420797312.5U CN204553955U (en) | 2014-12-15 | 2014-12-15 | Relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204553955U true CN204553955U (en) | 2015-08-12 |
Family
ID=53829066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420797312.5U Active CN204553955U (en) | 2014-12-15 | 2014-12-15 | Relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204553955U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106490984A (en) * | 2016-11-25 | 2017-03-15 | 泰州乐金电子冷机有限公司 | Drinking water machine for refrigerator |
| CN114394076A (en) * | 2022-01-26 | 2022-04-26 | 贵州新安航空机械有限责任公司 | Direct-acting diaphragm type overflow valve for urban rail vehicle gas circuit control system |
-
2014
- 2014-12-15 CN CN201420797312.5U patent/CN204553955U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106490984A (en) * | 2016-11-25 | 2017-03-15 | 泰州乐金电子冷机有限公司 | Drinking water machine for refrigerator |
| CN114394076A (en) * | 2022-01-26 | 2022-04-26 | 贵州新安航空机械有限责任公司 | Direct-acting diaphragm type overflow valve for urban rail vehicle gas circuit control system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |