CN202790741U - Oil tank constant pressure pressure-reducing valve - Google Patents
Oil tank constant pressure pressure-reducing valve Download PDFInfo
- Publication number
- CN202790741U CN202790741U CN 201220400412 CN201220400412U CN202790741U CN 202790741 U CN202790741 U CN 202790741U CN 201220400412 CN201220400412 CN 201220400412 CN 201220400412 U CN201220400412 U CN 201220400412U CN 202790741 U CN202790741 U CN 202790741U
- Authority
- CN
- China
- Prior art keywords
- pressure
- spring
- oil tank
- reducing valve
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Safety Valves (AREA)
Abstract
The utility model relates to a pressure-reducing valve and discloses an oil tank constant pressure pressure-reducing valve which comprises a valve body, an air interflow opening, springs and a plurality of exhaust holes. The springs are located in a valve body cavity and comprise a big spring and a small spring. The upper end of the big spring is connected with a plurality of sealing sheets which are located below the exhaust holes. A piston cavity is formed inside the big spring. The small spring is located in the piston cavity. The upper end of the piston cavity is provided with a through hole, and the lower end of the piston cavity is provided with a vent hole. The lower end of the small spring is connected with a piston block which is located right above the vent hole. According to the oil tank constant pressure pressure-reducing valve, the sealing sheets are larger than the exhaust holes in area, the piston block is matched with the vent hole in size, when air pressure is over high inside an oil tank, the piston block is opened, and the sealing sheets close the exhaust holes so that the air pressure inside the oil tank can not be increased, and therefore safety of the oil tank is ensured, and when negative pressure occurs inside the oil tank, the sealing sheets are opened, and the piston block is in a closed state so as to ensure that the air pressure inside the oil tank is the same as outside pressure, and therefore safety is ensured.
Description
Technical field
The utility model relates to a kind of reduction valve, particularly a kind of novel fuel tank constant pressure pressure-reducing valve.
Background technique
Progress along with science and technology, the reduction valve kind of prior art becomes more diverse, yet, most of structure of relief pressure valve of market circulation is single, and mostly adopt the structures such as seal ring seal groove, therefore and seal ring is easy to distortion, so that the life-span of reduction valve greatly reduces, invents and a kind ofly has novel mailbox constant pressure pressure-reducing valve this difficult problem is readily solved.
The model utility content
The shortcomings such as the utility model is simple for the structure of relief pressure valve that exists in the prior art, the easy distortion of seal ring provide a kind of novel fuel tank constant pressure pressure-reducing valve.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:
A kind of fuel tank constant pressure pressure-reducing valve, comprise valve body, gas AC port, spring and some exhaust ports, described spring is positioned at valve cavity, described spring is divided into big spring and little spring, described big spring upper end is connected with some diaphragm seals, described diaphragm seal is positioned at the exhaust port below, there is piston cavity described big spring inside, described little spring is positioned at piston cavity, described piston cavity upper end is provided with open-work, the piston cavity lower end is provided with vent, and described little spring lower end is connected with piston block, described piston block be positioned at vent directly over.In the said structure, the area of diaphragm seal just in time is complementary with vent and the people of piston block is little greater than the area of exhaust port, excessive when fuel tank internal air pressure, piston block is opened, and diaphragm seal is closed exhaust port simultaneously, thereby so that the fuel tank internal atmospheric pressure can not increase, guarantee thus fuel tank safety; When fuel tank internal produced negative pressure, diaphragm seal was opened, and piston block is in closed condition simultaneously, guarantees that thus fuel tank internal air pressure is the same with external pressure, guarantees safety.
As preferably, the quantity of described exhaust port is 2, and described diaphragm seal quantity is 2.This is designed with and is beneficial to the enhancing exhaust effect.
As preferably, described piston block is tapered.This structure is conducive to increase the flexibility that piston block passes in and out in vent.
The technical solution of the utility model is about to spring and is divided into big spring and little spring, and the big spring upper end is connected with some diaphragm seals, and diaphragm seal is positioned at the exhaust port below, and the little spring lower end is connected with piston block, and the piston block below is vent.The area of diaphragm seal is greater than the area of exhaust port, and the piston block size just in time is complementary with vent, when fuel tank internal air pressure excessive, piston block is opened, diaphragm seal is closed exhaust port simultaneously, thereby so that the fuel tank internal atmospheric pressure can not increase, guarantees thus fuel tank safety; When fuel tank internal produced negative pressure, diaphragm seal was opened, and piston block is in closed condition simultaneously, guarantees that thus fuel tank internal air pressure is the same with external pressure, guarantees safety.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
Embodiment
A kind of fuel tank constant pressure pressure-reducing valve, as shown in Figure 1, comprise valve body 1, gas AC port 2, spring 3 and 2 exhaust ports 4, described spring 3 is positioned at valve body 1 cavity, described spring 3 is divided into big spring 31 and little spring 32, described big spring 31 upper ends are connected with 2 diaphragm seals 5, described diaphragm seal 5 is positioned at exhaust port 4 belows, there is piston cavity 6 described big spring 31 inside, and described little spring 32 is positioned at piston cavity 6, and described piston cavity 6 upper ends are provided with open-work 7, piston cavity 6 lower ends are provided with vent 8, described little spring 32 lower ends are connected with piston block 9, described piston block 9 be positioned at vent 8 directly over, described piston block 9 is tapered.
In a word, the above only is preferred embodiment of the present utility model, and all equalizations of doing according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.
Claims (3)
1. fuel tank constant pressure pressure-reducing valve, comprise valve body, gas AC port, spring and some exhaust ports, described spring is positioned at valve cavity, it is characterized in that: described spring is divided into big spring and little spring, described big spring upper end is connected with some diaphragm seals, described diaphragm seal is positioned at the exhaust port below, there is piston cavity described big spring inside, described little spring is positioned at piston cavity, described piston cavity upper end is provided with open-work, the piston cavity lower end is provided with vent, and described little spring lower end is connected with piston block, described piston block be positioned at vent directly over.
2. a kind of fuel tank constant pressure pressure-reducing valve according to claim 1, it is characterized in that: the quantity of described exhaust port is 2, described diaphragm seal quantity is 2.
3. a kind of fuel tank constant pressure pressure-reducing valve according to claim 1 and 2, it is characterized in that: described piston block is tapered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220400412 CN202790741U (en) | 2012-08-14 | 2012-08-14 | Oil tank constant pressure pressure-reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220400412 CN202790741U (en) | 2012-08-14 | 2012-08-14 | Oil tank constant pressure pressure-reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202790741U true CN202790741U (en) | 2013-03-13 |
Family
ID=47818005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220400412 Expired - Fee Related CN202790741U (en) | 2012-08-14 | 2012-08-14 | Oil tank constant pressure pressure-reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202790741U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105620773A (en) * | 2014-10-28 | 2016-06-01 | 中国航空工业集团公司西安飞机设计研究所 | Two-way ventilation device for universal airplane wing fuel tank ventilation system |
-
2012
- 2012-08-14 CN CN 201220400412 patent/CN202790741U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105620773A (en) * | 2014-10-28 | 2016-06-01 | 中国航空工业集团公司西安飞机设计研究所 | Two-way ventilation device for universal airplane wing fuel tank ventilation system |
| CN105620773B (en) * | 2014-10-28 | 2018-04-03 | 中国航空工业集团公司西安飞机设计研究所 | A kind of bidirectional ventilating device for general class aircraft wing fuel tank vent system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205173589U (en) | Diaphragm check valve | |
| CN202303294U (en) | Waterproof air-permeable plug of guardrail tube | |
| CN202790741U (en) | Oil tank constant pressure pressure-reducing valve | |
| CN202629166U (en) | Quick exhaust valve | |
| CN204143298U (en) | A kind of water-proof type computing machine | |
| CN205896346U (en) | Electromagnetism gas accuse subassembly | |
| CN107785518A (en) | A kind of battery of decompression explosion-proof | |
| CN201764047U (en) | Auxiliary safety valve of solar water heater | |
| CN204368356U (en) | With the motorcycle oil tank lid of Oil-gas Separation function | |
| CN203987869U (en) | A kind of suction-jet type rotoclone collector | |
| CN207542309U (en) | A kind of battery of decompression explosion-proof | |
| CN201715049U (en) | Check ball valve with internal threads | |
| CN204126776U (en) | A kind of Novel air filter assembly with canister | |
| CN203174678U (en) | Vacuum suppressor for non-negative-pressure device | |
| CN203797072U (en) | Pressure vacuum release valve | |
| CN203427951U (en) | Fuel tap provided with gas return opening | |
| CN203130305U (en) | Fuel tank cap | |
| CN203286044U (en) | Sealed container with breather valve | |
| CN204610986U (en) | A kind of unidirectional autocontrol valve | |
| CN203892643U (en) | External pilot relief valve structure | |
| CN102705532A (en) | Quick air release valve | |
| CN202730712U (en) | Geo-membrane downward air-exhausting pressure-reducing valve | |
| CN203979600U (en) | Air inlet and exhaust valve | |
| CN202900356U (en) | Inlet valve middle structure | |
| CN203421490U (en) | Compressed air system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130313 Termination date: 20130814 |