CN211468157U - Low-flow-resistance oil-proof tank overpressure device - Google Patents
Low-flow-resistance oil-proof tank overpressure device Download PDFInfo
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- CN211468157U CN211468157U CN201921312744.1U CN201921312744U CN211468157U CN 211468157 U CN211468157 U CN 211468157U CN 201921312744 U CN201921312744 U CN 201921312744U CN 211468157 U CN211468157 U CN 211468157U
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Abstract
The utility model belongs to the technical field of the mailbox superpressure is prevented to fuel oil system, a grease proofing case superpressure device of low flow resistance is disclosed, include casing, valve subassembly, spring, sealing washer, well casing, diaphragm, go up the dish, lower dish, nut, check valve, go up the casing down. The lower shell is provided with a sealing pair which forms sealing with the valve assembly; the valve component is a vulcanization valve, and a valve rod is provided with threads for connecting the diaphragm; the spring is used for providing sealing force; the sealing ring is used for sealing the diaphragm cavity; the middle shell is provided with a pressure relief hole and a check valve mounting thread, and a diaphragm cavity is formed by the middle shell and the diaphragm; the upper disc, the lower disc and the nut connect the diaphragm to the valve component; the check valve comprises a spring, a steel ball, a sealing ring and a shell and is used for controlling the opening pressure of the valve component; the upper shell is used for protecting the membrane from being damaged by sharp objects; because the diaphragm chamber can sense the flow resistance pressure, the diaphragm pulls the valve assembly to further increase the opening degree of the valve assembly, so that the flow resistance is very low.
Description
Technical Field
The utility model belongs to the technical field of the fuel oil system prevents the postbox superpressure, especially, relate to a grease proofing case over-pressure device of low flow resistance.
Background
The oil tank overpressure prevention valve is a common safety valve of a fuel system, is arranged on an oil tank and consists of a shell, a valve and a spring, and the spring is used for controlling opening pressure; when the pressure of the oil tank is lower than the opening pressure value, the valve keeps sealed with the shell; when the pressure of the oil tank exceeds the opening pressure value, the valve is opened to release the pressure of the oil tank.
The common safety valve is in a direct-acting type, the opening degree of a valve is ensured by flow resistance and medium impact, and the safety valve in the structure is high in flow resistance.
SUMMERY OF THE UTILITY MODEL
The utility model provides a grease proofing case superpressure device of low flow resistance has the characteristic of low flow resistance, solves the high problem of current relief valve flow resistance.
The technical scheme of the utility model:
a low flow resistance grease trap overpressure device, the device comprising: the device comprises a lower shell, a valve assembly, a spring, a sealing ring, a middle shell, a diaphragm, an upper disc, a lower disc, a nut, a one-way valve and an upper shell;
the middle shell and the diaphragm form a diaphragm cavity; the sealing ring is used for sealing the diaphragm cavity;
the middle shell is provided with a pressure relief hole and a one-way valve mounting thread; the one-way valve mounting thread is used for connecting the one-way valve;
the valve assembly is characterized in that a valve rod of the valve assembly is provided with threads, and the upper disc, the lower disc and the nut are used for fixedly connecting one end of the diaphragm to the valve rod.
The utility model discloses technical scheme's characteristics and further improvement do:
(1) the diaphragm cavity is used for sensing flow resistance pressure, and pulling the valve assembly to increase the opening of the valve assembly and reduce the flow resistance pressure.
(2) The lower shell is internally provided with a sealing pair, and the sealing pair and the valve assembly form sealing.
(3) The grease proofing case super-pressure device of low flow resistance is connected with the oil tank, the bottom of casing is equipped with first opening down, the oil tank passes through the main entrance and is connected with the first opening of casing down.
(4) The oil tank is connected with the inlet end of the one-way valve through a pressure guide channel.
(5) The upper housing serves to protect the membrane from damage.
(6) And a second opening is formed in the upper surface of the upper shell.
The utility model provides a low flow resistance oil tank overpressure device, when the oil tank pressure is below the opening pressure value, the valve component and the one-way valve are kept sealed; when the pressure of the oil tank exceeds the opening pressure value, the valve assembly is opened, the check valve is opened at the same time, the flow resistance pressure enters the diaphragm cavity, the diaphragm drives the valve assembly to move, the opening degree of the valve assembly is further increased, and therefore the flow resistance is reduced.
Drawings
Fig. 1 is a schematic structural view of a low flow resistance oil tank overpressure device provided by the present invention;
FIG. 2 is a schematic view of the working principle of the low flow resistance oil tank overpressure prevention device provided by the present invention;
in fig. 1: the valve assembly comprises a 1-position lower shell, a valve assembly 2, a spring 3, a sealing ring 4, a middle shell 5, a check valve 6, an upper shell 7, a nut 8, a diaphragm 9, an upper disc 10 and a lower disc 11.
Detailed Description
The utility model provides a grease proofing case super pressure equipment of low flow resistance device, as shown in figure 1, the device is a relief valve, the relief valve includes casing 1, valve subassembly 2, spring 3, sealing washer 4, well casing 5, diaphragm 9, goes up dish 10, lower dish 11, nut 8, check valve 6, goes up casing 7 down, and diaphragm 9 and well casing 5 constitute the diaphragm chamber, and diaphragm 9 links to each other with valve subassembly 2 through last dish 10, lower dish 11 and nut 8, and check valve 6 and main valve are with opening the pressure value.
When the pressure of the oil tank is lower than the opening pressure value, the valve assembly 2 and the check valve 6 are kept sealed; when the pressure of the oil tank exceeds the opening pressure value, the valve component 2 is opened, meanwhile, the one-way valve 6 is opened, the flow resistance pressure enters the diaphragm cavity, the diaphragm 9 drives the valve component 2 to move, the opening degree of the valve component 2 is further increased, and therefore the flow resistance is reduced.
Claims (8)
1. A low flow resistance grease proofing case over-pressure device which characterized in that, the device includes: the device comprises a lower shell, a valve assembly, a spring, a sealing ring, a middle shell, a diaphragm, an upper disc, a lower disc, a nut, a one-way valve and an upper shell;
the middle shell and the diaphragm form a diaphragm cavity; the sealing ring is used for sealing the diaphragm cavity;
the middle shell is provided with a pressure relief hole and a one-way valve mounting thread; the one-way valve mounting thread is used for connecting the one-way valve;
the valve assembly is characterized in that a valve rod of the valve assembly is provided with threads, and the upper disc, the lower disc and the nut are used for fixedly connecting one end of the diaphragm to the valve rod.
2. The oil tank over-pressure device with low flow resistance as claimed in claim 1,
the diaphragm cavity is used for sensing flow resistance pressure, and pulling the valve assembly to increase the opening of the valve assembly and reduce the flow resistance pressure.
3. The oil tank over-pressure device with low flow resistance as claimed in claim 1,
the lower shell is internally provided with a sealing pair, and the sealing pair and the valve assembly form sealing.
4. The oil tank over-pressure device with low flow resistance as claimed in claim 1,
the valve component is a vulcanization valve.
5. The device of claim 1, wherein the device is connected to an oil tank, the bottom of the lower housing is provided with a first opening, and the oil tank is connected to the first opening of the lower housing through the main channel.
6. The oil tank over-pressure device with low flow resistance as claimed in claim 5,
the oil tank is connected with the inlet end of the one-way valve through a pressure guide channel.
7. The oil tank over-pressure device with low flow resistance as claimed in claim 1,
the upper housing serves to protect the membrane from damage.
8. The oil tank over-pressure device with low flow resistance as claimed in claim 1,
and a second opening is formed in the upper surface of the upper shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921312744.1U CN211468157U (en) | 2019-08-13 | 2019-08-13 | Low-flow-resistance oil-proof tank overpressure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921312744.1U CN211468157U (en) | 2019-08-13 | 2019-08-13 | Low-flow-resistance oil-proof tank overpressure device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211468157U true CN211468157U (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921312744.1U Active CN211468157U (en) | 2019-08-13 | 2019-08-13 | Low-flow-resistance oil-proof tank overpressure device |
Country Status (1)
| Country | Link |
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| CN (1) | CN211468157U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664667A (en) * | 2020-12-24 | 2021-04-16 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Pressure oil filling control valve with three-valve structure |
-
2019
- 2019-08-13 CN CN201921312744.1U patent/CN211468157U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664667A (en) * | 2020-12-24 | 2021-04-16 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Pressure oil filling control valve with three-valve structure |
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