CN211117821U - Minimum pressure maintaining valve for double-working-condition movable air compressor - Google Patents
Minimum pressure maintaining valve for double-working-condition movable air compressor Download PDFInfo
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- CN211117821U CN211117821U CN201921826098.0U CN201921826098U CN211117821U CN 211117821 U CN211117821 U CN 211117821U CN 201921826098 U CN201921826098 U CN 201921826098U CN 211117821 U CN211117821 U CN 211117821U
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Abstract
The utility model discloses a portable air compressor of duplex condition is with minimum pressure maintenance valve, including valve body, end cover, case and pressurize spring, be equipped with air inlet and gas outlet on the valve body, valve body and end cover fixed connection, case setting are in the valve body, and the pressurize spring is located between case and the end cover, is the seal chamber between case, valve body and the end cover, and the compressed air entry of intercommunication seal chamber is seted up to the end cover. When the system needs low-pressure operation, the minimum maintaining pressure is kept by the pressure maintaining spring, when the system needs high-pressure operation, compressed gas is introduced into the sealing cavity, and the minimum maintaining pressure is kept by the pressure maintaining spring and the pressure of the sealing cavity, so that the use under double working conditions is met. Compared with the existing minimum pressure valve structure, only a compressed air inlet needs to be formed in the end cover, and a pressure maintaining spring working cavity formed by the valve core, the valve body and the end cover is subjected to sealing treatment, so that the existing structure is changed slightly, and the improvement cost is low.
Description
Technical Field
The utility model belongs to concretely relates to minimum pressure valve.
Background
Currently, in order to maintain a minimum pressure for system operation on an air compressor, it is generally necessary to install a minimum pressure maintaining valve on an oil cylinder. The minimum pressure valve has the basic structure that when the system pressure is larger than the set pressure of the minimum pressure maintaining valve spring, the valve clack is opened, and the compressed air of the oil cylinder is output to the client air supply end through the minimum pressure maintaining valve. When the system pressure is lower than the set pressure of the spring, the valve clack is closed, so that the machine can always keep a certain pressure during the operation to maintain the safe operation of the system. Since this pressure maintenance valve spring is fixed, the pressure maintained is a constant value and can be used in only one operating condition in the actual field. However, the demand for dual-condition machines is increasing on the market, and a single constant-pressure minimum pressure maintaining valve cannot meet the market demand.
Chinese patent CN205370987U discloses a minimum pressure valve, in which a piston is arranged in an end cap, a seal cavity is formed between the piston and the end cap, a pressure maintaining spring is arranged between the seal cavity and a valve core, a compressed air inlet connected to the seal cavity is arranged on the end cap, the piston is moved in the end cap by connecting the compressed air to the seal cavity, thereby adjusting the pre-tightening force of the pressure maintaining spring, and the minimum pressure valve can have different opening pressure setting values.
Although the minimum pressure valve can provide different opening pressure set values, a piston component is required to be added into an end cover, the existing component is greatly changed, the mould is required to be opened again in production, and the improvement cost is high. And, different opening pressure set points are realized through the pretightning force of adjustment pressurize spring, can reduce the life of spring to reduce minimum pressure valve's life.
Disclosure of Invention
The utility model aims to solve the technical problem that a minimum pressure maintenance valve is provided, makes it to have two kinds of maintenance pressure, satisfies the use of duplex condition, and compares with the structure of current minimum pressure maintenance valve, and the change is little, improves the with low costs of production to can not reduce the life of minimum pressure maintenance valve.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme: the utility model provides a valve is maintained to portable air compressor minimum pressure of duplex condition, includes valve body, end cover, case and pressurize spring, is equipped with air inlet and gas outlet on the valve body, valve body and end cover fixed connection, and the case setting is in the valve body, and the pressurize spring is located between case and the end cover, is the seal chamber between case, valve body and the end cover, and the compressed air entry of intercommunication seal chamber is seted up to the end cover.
Further, a solenoid valve is installed at the compressed air inlet.
Furthermore, the compressed air inlet is provided with a threaded interface which is connected with the electromagnetic valve.
Furthermore, an O-shaped sealing ring is arranged between the valve core and the valve body, and an O-shaped sealing ring is also arranged between the valve body and the end cover.
The utility model discloses an useful part lies in, when the system needs the low pressure operation, minimum maintenance pressure keeps by the pressurize spring, when the system needs the high pressure operation, then lets in compressed gas in to sealed intracavity, and minimum maintenance pressure keeps by pressurize spring and sealed chamber pressure to satisfy the use of duplex condition. Compared with the existing minimum pressure valve structure, only a compressed air inlet needs to be formed in the end cover, and a pressure maintaining spring working cavity formed by the valve core, the valve body and the end cover is subjected to sealing treatment, so that the existing structure is changed slightly, and the improvement cost is low. When the system needs high-pressure operation, the minimum maintaining pressure is kept by the pressure of the pressure maintaining spring and the pressure of the sealing cavity, the compression amount of the pressure maintaining spring is the same as that of the pressure maintaining spring in low-pressure operation, the service life of the pressure maintaining spring cannot be shortened, and therefore the service life of the minimum pressure maintaining valve cannot be shortened.
Drawings
FIG. 1 is a partial cross-sectional view of an upper portion of an embodiment of the present invention;
fig. 2 is a sectional view taken along the sectional line shown in fig. 1.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1, a minimum pressure maintaining valve for a dual-working-condition mobile air compressor comprises a valve body 2, an end cover 1, a valve core 7 and a pressure maintaining spring 3, wherein an air inlet and an air outlet are formed in the valve body 2, the valve body 2 is fixedly connected with the end cover 1, the valve core 7 is arranged in the valve body 2, the pressure maintaining spring 4 is arranged between the valve core 7 and the end cover 1, a seal cavity 4 is formed between the valve core 7, the valve body 2 and the end cover 1, and the end cover 1 is provided with a compressed air inlet 5 communicated with the seal cavity 4. The compressed air inlet 5 is provided with an electromagnetic valve 6, and the compressed air inlet 5 is provided with a threaded interface connected with the electromagnetic valve 6. An O-shaped sealing ring 8 is arranged between the valve core 7 and the valve body 2, and an O-shaped sealing ring 8 is also arranged between the valve body 2 and the end cover 1.
When the system needs low pressure operation, minimum maintenance pressure is kept by the pressure maintaining spring 3, when the system needs high pressure operation, compressed gas is introduced into the sealing cavity 4, and the minimum maintenance pressure is kept by the pressure maintaining spring 3 and the pressure of the sealing cavity 4, so that the use of double working conditions is met. Compared with the existing minimum pressure valve structure, only a compressed air inlet 5 needs to be arranged on the end cover 1, and a working cavity of the pressure maintaining spring 3 consisting of the valve core 7, the valve body 2 and the end cover 1 is subjected to sealing treatment, the sealing treatment can be realized by adding the O-shaped sealing ring 8, the change of the existing structure is small, and the improvement cost is low. When the system needs high pressure operation, minimum maintaining pressure is kept by the pressure of the pressure maintaining spring 3 and the sealing cavity 4, the compression amount of the pressure maintaining spring 3 is the same as that of the pressure maintaining spring in low pressure operation, the service life of the pressure maintaining spring 3 cannot be shortened, and therefore the service life of the minimum pressure maintaining valve cannot be shortened.
It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form, and any simple modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.
Claims (4)
1. The utility model provides a valve is maintained to portable air compressor minimum pressure of duplex condition, includes valve body, end cover, case and pressurize spring, be equipped with air inlet and gas outlet on the valve body, valve body and end cover fixed connection, the case sets up in the valve body, the pressurize spring is located between case and the end cover, its characterized in that: a sealing cavity is formed among the valve core, the valve body and the end cover, and a compressed air inlet communicated with the sealing cavity is formed in the end cover.
2. The minimum pressure maintenance valve for a dual condition mobile air compressor of claim 1, wherein: and the compressed air inlet is provided with an electromagnetic valve.
3. The minimum pressure maintenance valve for a dual condition mobile air compressor of claim 2, wherein: the compressed air inlet is provided with a threaded interface which is connected with the electromagnetic valve.
4. The minimum pressure maintenance valve for a dual condition mobile air compressor of claim 1, wherein: an O-shaped sealing ring is arranged between the valve core and the valve body, and an O-shaped sealing ring is also arranged between the valve body and the end cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921826098.0U CN211117821U (en) | 2019-10-29 | 2019-10-29 | Minimum pressure maintaining valve for double-working-condition movable air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921826098.0U CN211117821U (en) | 2019-10-29 | 2019-10-29 | Minimum pressure maintaining valve for double-working-condition movable air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211117821U true CN211117821U (en) | 2020-07-28 |
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ID=71690533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921826098.0U Active CN211117821U (en) | 2019-10-29 | 2019-10-29 | Minimum pressure maintaining valve for double-working-condition movable air compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211117821U (en) |
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2019
- 2019-10-29 CN CN201921826098.0U patent/CN211117821U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 215000 No. 266, Changyang street, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee after: Hitachi Compressor (Suzhou) Co.,Ltd. Address before: No. 266 Changyang Street, Industrial Park, Suzhou City, Jiangsu Province, 215024 Patentee before: SUZHOU SULLAIR AIR EQUIPMENT CO.,LTD. |
|
| CP03 | Change of name, title or address |