CN203963138U - A kind of safety check - Google Patents
A kind of safety check Download PDFInfo
- Publication number
- CN203963138U CN203963138U CN201420179805.2U CN201420179805U CN203963138U CN 203963138 U CN203963138 U CN 203963138U CN 201420179805 U CN201420179805 U CN 201420179805U CN 203963138 U CN203963138 U CN 203963138U
- Authority
- CN
- China
- Prior art keywords
- spool
- fixed base
- valve
- adjustment screw
- sectional shape
- 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
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- Check Valves (AREA)
- Safety Valves (AREA)
Abstract
The utility model relates to a kind of safety check, comprise valve seat, spool, spring, valve body, adjustment screw and pad, described valve body is provided with entrance and exit, wherein, described valve seat is provided with fixed base, fixed base is provided with O-ring seals, described adjustment screw consists of adjusting screw and locking nut, it is orthohexagonal through hole that described adjusting screw is provided with sectional shape, described pad is arranged on the water outlet of described valve body, described spool body front part and described fixed base agree with sealing mutually, described spring one end is positioned in the filling chamber of spool cavity, the other end contacts with adjustment screw, can regulate according to demand the required pressure of Open valve, good airproof performance.
Description
Technical field
The utility model relates to valve technology field, relates in particular in valve and can prevent the safety check that fluid flows backwards.
Background technique
In existing engineering, there are many occasions will use valve, especially, in chemical industry, sampling, analytical system engineering, need valve as the mobile keying element of fluid.In some engineering, need to guarantee that fluid flows along fixing direction, prevent that fluid from flowing backwards, technician has designed the safety check of one-way conduction for this reason, and fluid flows along the direction that realizes design, if reverse fluid flow, can cause closure of check ring, thereby realizes one-directional fluid flow.
In existing safety check, due to Structure Designing Problem, can have valve opening pressure transient, valve opening pressure is unadjustable, and the problem of the poor sealing and so on of valve during minimum cracking pressure, affects the normal use of safety check.
Model utility content
Technical problem to be solved in the utility model is to provide a kind of safety check for above drawback, can regulate according to demand the required pressure of Open valve, good airproof performance.
For solving the problems of the technologies described above, the technical solution of the utility model is:
A kind of safety check, comprise valve seat, spool, spring, valve body, adjustment screw and pad, described valve body is provided with entrance and exit, wherein, described valve seat is provided with fixed base, described fixed base is provided with O-ring seals, described spool comprises spool main body and valve core case, described spool main body is comprised of spool body front part and spool back body, described spool body front part is round structure, its external diameter is identical with the internal diameter of described fixed base, the sectional shape of described spool back body is isosceles trapezoid, described valve core case comprises connected element and pedestal, described connected element sectional shape is isosceles trapezoid, connected element is connected with spool back body, for integral type structure, described pedestal is cylindrical structural, pedestal one end formation cavity that caves inward, described cavity comprises fills chamber and buffer cavity, the sectional shape of described buffer cavity is isosceles triangle, its drift angle is 160 °, described adjustment screw consists of adjusting screw and locking nut, it is orthohexagonal through hole that described adjusting screw is provided with sectional shape, described pad is arranged on the water outlet of described valve body, described spool body front part and described fixed base agree with sealing mutually, described spring one end is positioned in the filling chamber of spool cavity, the other end contacts with adjustment screw.
Above-mentioned a kind of safety check, wherein, described spool back body is provided with the chamfering of 30 °.
The beneficial effects of the utility model are:
When the utility model is used, the pressure rotation adjusting screw required according to Open valve, make spring between adjustment screw and spool in a suitable extensibility, rotational lock nut is fixed on adjusting screw on valve body, pad has well played the effect of buffering and wear prevention, because adjusting screw is provided with orthohexagonal through hole, therefore can not affect the proper flow of safety check inner fluid, pad has also played the effect of sealing to a certain extent, prevents that fluid from flowing out from gap location.
The spool main body of spool matches with the fixed base on valve seat, between spool body front part and fixed base, between spool back body and O-ring seals, carry out double seal, greatly increased sealing effect, simultaneously, spring is arranged in the pedestal of valve core case, avoid using process medi-spring skew displacement and have influence on the required pressure of valve opening, buffer cavity plays certain buffer function to spring, make safety check more accurately, safely, reliably, the setting of chamfering can effectively prevent from scratching valve internal equipment, has increased the working life of safety check.
Accompanying drawing explanation
Fig. 1 is sectional view of the present utility model
Fig. 2 is the sectional view of the utility model spool
Fig. 3 is the plan view of the utility model fixed base
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
A kind of safety check as shown in the figure, comprise valve seat 1, spool 2, spring 3, valve body 4, adjustment screw 5 and pad 6, described valve body is provided with entrance 7 and outlet 8, wherein, described valve seat 1 is provided with fixed base 11, described fixed base 11 is provided with O-ring seals 12, described spool 2 comprises spool main body 21 and valve core case 22, described spool main body 21 is comprised of spool body front part 23 and spool back body 24, described spool body front part 23 is round structure, its outside diameter d 1 is identical with the inner diameter d 2 of described fixed base, d1=d2=3.6mm, the sectional shape of described spool back body 24 is isosceles trapezoid, described spool back body is provided with the chamfering 9 of 30 °, the base length l1=6.6mm of spool back body 24, described valve core case 22 comprises connected element 25 and pedestal 26, described connected element 25 sectional shapes are isosceles trapezoid, connected element 25 is connected with spool back body 24, for integral type structure, described pedestal 26 is cylindrical structural, the outside diameter d 4=7.9mm of described pedestal 26, pedestal 26 one end cave inward and form cavity 27, described cavity 27 comprises fills chamber 28 and buffer cavity 29, the sectional shape of described buffer cavity 29 is isosceles triangle, its drift angle a is 160 °, the diameter d 3=6.8mm in described filling chamber 28, described adjustment screw 5 consists of adjusting screw 51 and locking nut 52, it is orthohexagonal through hole 53 that described adjusting screw 51 is provided with sectional shape, described pad 6 is cirque structure, be arranged on water outlet 8 places of described valve body, described spool body front part 23 is agreed with sealing mutually with described fixed base 11, described spring 3 one end are positioned in the filling chamber 28 of spool cavity 27, the other end contacts with adjustment screw 5.
When the utility model is used, according to the required pressure of Open valve, rotate adjusting screw to change the distance between adjusting screw and locking nut, make spring between adjustment screw and spool in a suitable extensibility, rotational lock nut is fixed on adjusting screw on valve body, pad has well played the effect of buffering and wear prevention, because adjusting screw is provided with orthohexagonal through hole, therefore can not affect the proper flow of safety check inner fluid, pad has also played the effect of sealing to a certain extent, prevents that fluid from flowing out from gap location.
The spool main body of spool matches with the fixed base on valve seat, between spool body front part and fixed base, between spool back body and O-ring seals, carry out double seal, greatly increased sealing effect, simultaneously, spring is arranged in the pedestal of valve core case, avoid using process medi-spring skew displacement and have influence on the required pressure of valve opening, buffer cavity plays certain buffer function to spring, make safety check more accurately, safely, reliably, the setting of chamfering can effectively prevent from scratching valve internal equipment, has increased the working life of safety check.
Here description of the present utility model and application is illustrative; not want by scope restriction of the present utility model in the above-described embodiments; therefore, the utility model is not subject to the restriction of the present embodiment, and the technological scheme that any employing equivalence replacement obtains is all in the scope of the utility model protection.
Claims (2)
1. a safety check, comprise valve seat, spool, spring, valve body, adjustment screw and pad, described valve body is provided with entrance and exit, it is characterized by, described valve seat is provided with fixed base, described fixed base is provided with O-ring seals, described spool comprises spool main body and valve core case, described spool main body is comprised of spool body front part and spool back body, described spool body front part is round structure, its external diameter is identical with the internal diameter of described fixed base, the sectional shape of described spool back body is isosceles trapezoid, described valve core case comprises connected element and pedestal, described connected element sectional shape is isosceles trapezoid, connected element is connected with spool back body, for integral type structure, described pedestal is cylindrical structural, pedestal one end formation cavity that caves inward, described cavity comprises fills chamber and buffer cavity, the sectional shape of described buffer cavity is isosceles triangle, its drift angle is 160 °, described adjustment screw consists of adjusting screw and locking nut, it is orthohexagonal through hole that described adjusting screw is provided with sectional shape, described pad is arranged on the water outlet of described valve body, described spool body front part and described fixed base agree with sealing mutually, described spring one end is positioned in the filling chamber of spool cavity, the other end contacts with adjustment screw.
2. a kind of safety check as claimed in claim 1, is characterized by, and described spool back body is provided with the chamfering of 30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420179805.2U CN203963138U (en) | 2014-04-14 | 2014-04-14 | A kind of safety check |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420179805.2U CN203963138U (en) | 2014-04-14 | 2014-04-14 | A kind of safety check |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203963138U true CN203963138U (en) | 2014-11-26 |
Family
ID=51923720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420179805.2U Expired - Fee Related CN203963138U (en) | 2014-04-14 | 2014-04-14 | A kind of safety check |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203963138U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570681A (en) * | 2016-03-15 | 2016-05-11 | 凯迈（洛阳）气源有限公司 | Valve seat and cylinder valve using same |
-
2014
- 2014-04-14 CN CN201420179805.2U patent/CN203963138U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570681A (en) * | 2016-03-15 | 2016-05-11 | 凯迈（洛阳）气源有限公司 | Valve seat and cylinder valve using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 Termination date: 20210414 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |