CN205479552U - Vacuum negative pressure relief valve - Google Patents
Vacuum negative pressure relief valve Download PDFInfo
- Publication number
- CN205479552U CN205479552U CN201620089743.5U CN201620089743U CN205479552U CN 205479552 U CN205479552 U CN 205479552U CN 201620089743 U CN201620089743 U CN 201620089743U CN 205479552 U CN205479552 U CN 205479552U
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- valve
- valve body
- negative pressure
- rod
- relief valve
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Abstract
The utility model provides a vacuum negative pressure relief valve, valve body and last valve body under includes, down the valve body with go up valve body fixed connection, the valve body internal surface is equipped with to the bellied flange in inside down, and a clamping ring is placed in the upper surface of flange, the upper end of clamping ring through -hole is equipped with first annular breach, the lower extreme of disk seat is equipped with annular boss, the annular boss the side be equipped with with the corresponding second annular breach of first annular breach, the side of boss with install T type sealing washer between the through -hole of clamping ring, compare the desiccator in prior art, the beneficial effects of the utility model are that: be provided with adjustment screw on the valve rod, through adjusting the set pressure that adjustment screw adjusted the relief valve, improved the action performance the when valve is opened and close.
Description
Technical field
This utility model belongs to valve field, particularly relates to a kind of negative pressure of vacuum relief valve.
Background technology
Negative pressure of vacuum relief valve is to run because of system at pipeline or container or stop and producing negative pressure or time vacuum is stepped up, and this valve can automatically turn on, and destroys vacuum effect, makes pipeline and the unlikely generation of the miscellaneous equipment phenomenon such as split flat, recessed, to protect the safety of equipment.
But all there is certain defect and deficiency in existing antivoid valve; such as sealing is poor, valve opening and closing time the problems such as performance is unstable; these problems can cause by protection equipment, container or the abnormal emission of pipeline medium; have impact on using effect, even can affect the safe operation of container and system.
Utility model content
In order to solve techniques discussed above problem, this utility model offer techniques below scheme:
nullA kind of negative pressure of vacuum relief valve，Including lower valve body and upper valve body，Described lower valve body and the fixing connection of described upper valve body，Described lower valve interior surface is provided with internally protruding flange，One pressure ring is placed in the upper surface of described flange，The upper end of described pressure ring through hole is provided with first annular breach，The lower end of described valve seat is provided with annular boss，The side of described annular boss is provided with the second annular breach corresponding with described first annular breach，Between side and the through hole of described pressure ring of described boss, T-shaped sealing ring is installed，The big end of described T-shaped sealing ring is placed in described first annular breach and described second annular breach，Also include valve rod and flap，The lower end of described valve rod is connected with the upper surface of described flap，The upper end of described valve rod is deep in the cavity of upper valve body through described valve seat，Flap upper surface under the small end end face of described T-shaped sealing ring and normally off contacts，For improving the sealing between described flap and described valve seat，Described valve rod upper end is fixed with adjustment screw rod，It is provided with elastic component between bottom and the described valve seat of described adjustment screw rod，For the pretightning force certain for the offer of described flap，Described flap is made usually to be in normally off.
Further, described adjustment screw rod is adjustable relative to described stem position, adjusts screw rod by regulation and regulates the set-pressure of this relief valve.
Further, between side and the inner surface of described lower valve body of described valve seat, the first O is installed, the second O is installed between the end of described valve seat and described upper valve body,
Further, the upper end of described lower valve body is provided with female thread, and the lower end of described upper valve body is provided with external screw thread, and described lower valve body and described upper valve body are threaded connection and are fixed together.
Further, the middle part of described valve rod is provided with spacing ring, and described spacing ring is placed in above described valve seat, and described spacing ring is adjustable relative to described stem position.
Further, described valve rod and described adjustment screw rod are fixed together by split pin.
Further, described elastic component is spring.
Further, described spacing ring is arranged on described valve rod by straight pin.
Compared to drying machine of the prior art, the beneficial effects of the utility model are:
1, it is provided with adjustment screw rod on valve rod, adjusts screw rod by regulation and carry out the set-pressure of regulation safety valve, improve performance during valve opening and closing；
2, the middle part of valve rod is provided with spacing ring, is defined the limit opening degree of flap by the position that regulation spacing ring is fixing；
3, between side and the inner surface of lower valve body of valve seat, between valve seat and the end of upper valve body, it is fitted with O RunddichtringO, improves the sealing property of relief valve；
4, T-shaped sealing ring is used to improve the sealing property of valve further.
According to below in conjunction with the accompanying drawing detailed description to this utility model specific embodiment, those skilled in the art will become more apparent from of the present utility model above-mentioned and other purposes, advantage and feature.
Accompanying drawing explanation
Describe specific embodiments more of the present utility model the most by way of example, and not by way of limitation in detail.Reference identical in accompanying drawing denotes same or similar parts or part.It should be appreciated by those skilled in the art that what these accompanying drawings were not necessarily drawn to scale.In accompanying drawing:
Fig. 1 is overall structure schematic diagram of the present utility model；
Fig. 2 is the partial structurtes enlarged drawing that this utility model T-shaped sealing ring seals.
Detailed description of the invention
nullA kind of negative pressure of vacuum relief valve as depicted in figs. 1 and 2，Including lower valve body 1 and upper valve body 11，Described lower valve body 1 and the fixing connection of described upper valve body 11，Described lower valve body 1 inner surface is provided with internally protruding flange 15，One pressure ring 4 is placed in the upper surface of described flange 15，The upper end of described pressure ring 4 through hole is provided with first annular breach 16，The lower end of described valve seat is provided with annular boss 18，The side of described annular boss 18 is provided with the second annular breach 17 corresponding with described first annular breach 16，Between side and the through hole of described pressure ring 4 of described boss 18, T-shaped sealing ring 3 is installed，The big end of described T-shaped sealing ring 3 is placed in described first annular breach 16 and described second annular breach 17，Also include valve rod 14 and flap 2，The lower end of described valve rod 14 is connected with the upper surface of described flap 2，The upper end of described valve rod 14 is deep in the cavity of upper valve body 11 through described valve seat 2，Flap 2 upper surface under the small end end face of described T-shaped sealing ring 3 and normally off contacts，For improving the sealing between described flap 2 and described valve seat 5，Described valve rod 14 upper end is fixed with adjustment screw rod 12，It is provided with elastic component 10 between bottom and the described valve seat 5 of described adjustment screw rod 12，For providing certain pretightning force for described flap 2，Described flap 2 is made usually to be in normally off.
Preferably, described adjustment screw rod 12 is adjustable relative to described valve rod 14 position, adjusts screw rod 14 by regulation and regulates the set-pressure of this relief valve.
Preferably, between side and the inner surface of described lower valve body 1 of described valve seat 5, first O 6 is installed, the second O 7 is installed between described valve seat 5 and the end of described upper valve body 11,
Preferably, the upper end of described lower valve body 1 is provided with female thread, and the lower end of described upper valve body 11 is provided with external screw thread, and described lower valve body 1 and described upper valve body 11 are threaded connection and are fixed together.
Preferably, the middle part of described valve rod 14 is provided with spacing ring 8, and described spacing ring 8 is placed in above described valve seat 5, and described spacing ring 8 is adjustable relative to described valve rod 14 position.
Preferably, described valve rod 14 and described adjustment screw rod 12 are fixed together by split pin 13.
Preferably, described elastic component 10 is spring.
Preferably, described spacing ring 8 is arranged on described valve rod 14 by straight pin 9.
The operation principle of relief valve is as follows:
If for negative pressure system: when negative pressure exceedes permissible value in container, the valve seat of this valve automatically turns on flap, suck air；When negative pressure reaches permissible value in container, after this valve is by the pressure effect of spring, it is automatically switched off, thus protects equipment and system.Being arranged on normal non-negative pressure system, when the diffusion valve of container and system is not switched on, when producing negative pressure, this valve automatically turns on.
If for normal non-negative pressure system: various Korrosionsmedium containers, such as absorption tower, distillation column, storage tank, tank etc., after being passed through steam clean, if diffusion valve is not opened, steam condenses, and produces negative pressure, the valve seat of this valve will be automatically separated with flap, and this valve automatically turns on, and sucks air.When negative pressure is reduced to permissible value, after valve is by the pressure effect of spring, forcing valve seat to reset with valve clack sealing surface, this valve is automatically switched off.Thus ensure the safe operation of equipment container and system.
So far, those skilled in the art will recognize that, multiple exemplary embodiment of the present utility model is illustrate and described although the most detailed, but, in the case of without departing from this utility model spirit and scope, still can directly determine according to this utility model disclosure or derive other variations or modifications of many meeting this utility model principle.Therefore, scope of the present utility model is it is understood that and regard as covering other variations or modifications all these.
Claims (8)
- null1. a negative pressure of vacuum relief valve，Including lower valve body (1) and upper valve body (11)，Described lower valve body (1) and the fixing connection of described upper valve body (11)，Described lower valve body (1) inner surface is provided with internally protruding flange (15)，One pressure ring (4) is placed in the upper surface of described flange (15)，The upper end of described pressure ring (4) through hole is provided with first annular breach (16)，The lower end of described valve seat is provided with annular boss (18)，The side of described annular boss (18) is provided with second annular breach (17) corresponding with described first annular breach (16)，Between side and the through hole of described pressure ring (4) of described boss (18), T-shaped sealing ring (3) is installed，The big end of described T-shaped sealing ring (3) is placed in described first annular breach (16) and described second annular breach (17)，Also include valve rod (14) and flap (2)，The lower end of described valve rod (14) is connected with the upper surface of described flap (2)，The upper end of described valve rod (14) is deep in the cavity of upper valve body (11) through described valve seat (2)，Flap (2) upper surface under the small end end face of described T-shaped sealing ring (3) and normally off contacts，For improving the sealing between described flap (2) and described valve seat (5)，Described valve rod (14) upper end is fixed with adjustment screw rod (12)，It is provided with elastic component (10) between bottom and the described valve seat (5) of described adjustment screw rod (12)，For providing certain pretightning force for described flap (2)，Described flap (2) is made usually to be in normally off.
- 2. a kind of negative pressure of vacuum relief valve as claimed in claim 1, it is characterised in that: described adjustment screw rod (12) is adjustable relative to described valve rod (14) position, adjusts screw rod (14) by regulation and regulates the set-pressure of this relief valve.
- 3. a kind of negative pressure of vacuum relief valve as claimed in claim 1, it is characterized in that: between side and the inner surface of described lower valve body (1) of described valve seat (5), the first O (6) is installed, the second O (7) is installed between the end of described valve seat (5) and described upper valve body (11).
- 4. a kind of negative pressure of vacuum relief valve as claimed in claim 1 or 2, the upper end of described lower valve body (1) is provided with female thread, the lower end of described upper valve body (11) is provided with external screw thread, described lower valve body (1) and described upper valve body (11) and is threaded connection and is fixed together.
- 5. a kind of negative pressure of vacuum relief valve as described in claim (3), it is characterized in that: the middle part of described valve rod (14) is provided with spacing ring (8), described spacing ring (8) is placed in described valve seat (5) top, and described spacing ring (8) is adjustable relative to described valve rod (14) position.
- 6. a kind of negative pressure of vacuum relief valve as claimed in claim 4, it is characterised in that: described valve rod (14) and described adjustment screw rod (12) are fixed together by split pin (13).
- 7. a kind of negative pressure of vacuum relief valve as claimed in claim 5, it is characterised in that: described elastic component is spring (10).
- 8. a kind of negative pressure of vacuum relief valve as claimed in claim 5, it is characterised in that: described spacing ring (8) is arranged on described valve rod (14) by straight pin (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620089743.5U CN205479552U (en) | 2016-01-29 | 2016-01-29 | Vacuum negative pressure relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620089743.5U CN205479552U (en) | 2016-01-29 | 2016-01-29 | Vacuum negative pressure relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205479552U true CN205479552U (en) | 2016-08-17 |
Family
ID=56619277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620089743.5U Active CN205479552U (en) | 2016-01-29 | 2016-01-29 | Vacuum negative pressure relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205479552U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180311A (en) * | 2018-02-07 | 2018-06-19 | 菲时特集团股份有限公司 | One kind automatically cuts off angle valve |
-
2016
- 2016-01-29 CN CN201620089743.5U patent/CN205479552U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180311A (en) * | 2018-02-07 | 2018-06-19 | 菲时特集团股份有限公司 | One kind automatically cuts off angle valve |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |