CN202418747U - Low-medium pressure piston check valve - Google Patents
Low-medium pressure piston check valve Download PDFInfo
- Publication number
- CN202418747U CN202418747U CN201220017552XU CN201220017552U CN202418747U CN 202418747 U CN202418747 U CN 202418747U CN 201220017552X U CN201220017552X U CN 201220017552XU CN 201220017552 U CN201220017552 U CN 201220017552U CN 202418747 U CN202418747 U CN 202418747U
- Authority
- CN
- China
- Prior art keywords
- valve
- piston
- valve body
- valve seat
- ring
- 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 - Lifetime
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Abstract
The utility model discloses a low-medium pressure piston check valve, which is characterized in that a valve seat with a cylindrical structure is vertically connected with the joint of a valve inlet and a valve outlet in the manner of threaded connection; the upper part of the valve seat is provided with ring bosses which are capable of performing support action and are located in the horizontal direction; a gasket is arranged between the lower surface of each ring boss of the valve seat and a valve body; and O-shaped gaskets and check rings for bearing the O-shaped gaskets are sheathed between the outer surface of the cylindrical structure of the valve seat and the valve body. The low-medium pressure piston check valve disclosed by the utility model has the advantages that the gaskets are arranged between the valve body and the valve seat, thereby, the airtightness is improved, the impact force can be effectively reduced, the abrasion is reduced, and meanwhile, the processing requirement is also lowered, the primary percent of pass of the product is increased, and the manufacturing cost is saved.
Description
Technical field
The utility model relates to a kind of valve, specifically is a kind of low middle piston check valve of pressing.
Background technique
Use at present low in press piston check valve, like Chinese patent 200820163902.7, comprise valve body, valve gap, piston and valve seat, when check valve inlet side pressure during greater than outlet side pressure, pressure difference promotes piston and moves upward valve opening; When check valve inlet side pressure during less than outlet side pressure, valve closing.This low middle piston and the impact force between valve seat, valve seat and the valve body of piston check valve of pressing is big, and the seal request of valve seat and valve body is high, and difficulty of processing is big, so the product first-time qualification rate is low.
The model utility content
The purpose of the utility model provides in a kind of simple in structure, sturdy and durable, easy processing low and presses piston check valve.
The utility model has adopted following technological scheme:
Press piston check valve in low, comprise valve seat, valve gap, the piston of valve body, cylindrical structure, valve body lower portion is provided with valve inlet and valve export, and valve inlet is following, and valve export is last; Valve seat is threaded in the jointing place of valve inlet and valve export vertically, and valve seat top is provided with the annular boss of passive substantially horizontal; Valve body top is cylinder open, and valve body top is connected through bolt with valve gap, and valve gap and valve body joint are provided with annular tongue-and-groove; Be socketed with piston cylinder in the cylinder open of valve body top, piston cylinder top is provided with the tenon that coincide with described annular tongue-and-groove; Be provided with piston in the piston cylinder, the piston bottom is shaped on the sealing surface that cooperatively interacts with valve seat; Be provided with spring in the piston cavity, spring connects piston and valve gap; Be shaped on one-way valve and equalizing orifice on the piston, one-way valve is connected piston cavity and valve export with equalizing orifice, and the import of one-way valve links to each other with piston cavity; Valve gap is provided with suspension ring and exhaust-valve, and exhaust-valve connects piston cavity; Be provided with packing ring between the lower surface of the annular boss of said valve seat and the valve body, the back-up ring that is arranged with O type packing ring between the outer surface of the tubular structure of valve seat and the valve body and carries O type packing ring.
Preferably, be provided with packing ring between the lower surface of said piston cylinder tenon and the valve body.
Preferably, said piston is provided with piston ring.
The advantage of the utility model is:
Be provided with packing ring between valve body and the valve seat, improved gas-tight property; Can effectively reduce impact force, reduce wearing and tearing; Simultaneously also reduce processing request, improved the first-time qualification rate of product, saved manufacture cost.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 be the utility model valve body and valve seat be connected schematic representation.
Label among the figure: 1-valve body, 2-valve seat, 3-piston, 4-piston ring, 5-equalizing orifice, 6-one-way valve, 7-spring, 8-piston cylinder, 9-bolt, 10-nut, 11-packing ring, 12-valve gap, 13-suspension ring, 14-exhaust-valve, 15-back-up ring, 16-O type packing ring, 17-packing ring, 18-valve inlet, 19-valve export.
Embodiment
Like Fig. 1, shown in Figure 2, the low middle piston check valve of pressing comprises valve body 1, valve seat 2, valve gap 12, piston 3, and valve body lower portion is provided with valve inlet 18 and valve export 19, and valve inlet is following, and valve export is last; The valve seat of cylindrical structure is threaded in the jointing place of valve body import and valve export vertically, and valve seat top is provided with the annular boss of passive substantially horizontal; Valve body top is cylinder open, and valve body top is connected through bolt with valve gap, and valve gap and valve body joint are provided with annular tongue-and-groove; Be socketed with piston cylinder 8 in the cylinder open of valve body top, piston cylinder top is provided with the tenon that coincide with described annular tongue-and-groove; Be provided with piston in the piston cylinder, the piston bottom is shaped on the sealing surface that cooperatively interacts with valve seat; Be provided with spring 7 in the piston cavity, spring connects piston and valve gap; Be shaped on one-way valve 6 and equalizing orifice 5 on the piston, one-way valve is connected piston cavity and valve export with equalizing orifice, and the import of one-way valve links to each other with piston cavity; Valve gap is provided with suspension ring 13 and exhaust-valve 14, and exhaust-valve connects piston cavity; Be provided with packing ring 17 between the lower surface of the annular boss of said valve seat and the valve body, the back-up ring 15 that is arranged with O type packing ring 16 between the outer surface of the tubular structure of valve seat and the valve body and carries O type packing ring; Be provided with packing ring 11 between the lower surface of said piston cylinder tenon and the valve body; Said piston is provided with piston ring 4.
The utility model working principle is following:
When the pressure of valve inlet was higher than valve export, piston rose, and one-way valve and equalizing orifice be the interior pressure of release piston cavity simultaneously, and the piston quick and stable is risen; When the pressure of valve inlet is lower than valve export, during valve closing, closed check valve, medium slowly gets into piston cavity through equalizing orifice 5, and piston cavity pressure is slowly increased, and piston is slowly closed, and reduces water hammer.
Claims (3)
1. press piston check valve in low, it is characterized in that comprise valve seat, valve gap, the piston of valve body, cylindrical structure, valve body lower portion is provided with valve inlet and valve export, valve inlet is following, and valve export is last; Valve seat is threaded in the jointing place of valve inlet and valve export vertically, and valve seat top is provided with the annular boss of passive substantially horizontal; Valve body top is provided with cylinder open, and valve body top is connected through bolt with valve gap, and valve gap and valve body joint are provided with annular tongue-and-groove; Be socketed with piston cylinder in the cylinder open on valve body top, piston cylinder top is provided with the tenon that coincide with described annular tongue-and-groove; Be provided with piston in the piston cylinder, the piston bottom is shaped on the sealing surface that cooperatively interacts with valve seat; Be provided with spring in the piston cavity, spring connects piston and valve gap; Be shaped on one-way valve and equalizing orifice on the piston, one-way valve is connected piston cavity and valve export with equalizing orifice, and the import of one-way valve links to each other with piston cavity; Valve gap is provided with suspension ring and exhaust-valve, and exhaust-valve connects piston cavity; Be provided with packing ring between the lower surface of the annular boss of said valve seat and the valve body, the back-up ring that is arranged with O type packing ring between the outer surface of the tubular structure of valve seat and the valve body and carries O type packing ring.
2. the low middle piston check valve of pressing as claimed in claim 1 is characterized in that, is provided with packing ring between the lower surface of said piston cylinder tenon and the valve body.
3. the low middle piston check valve of pressing as claimed in claim 1 is characterized in that said piston is provided with piston ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220017552XU CN202418747U (en) | 2012-01-16 | 2012-01-16 | Low-medium pressure piston check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220017552XU CN202418747U (en) | 2012-01-16 | 2012-01-16 | Low-medium pressure piston check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202418747U true CN202418747U (en) | 2012-09-05 |
Family
ID=46743517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220017552XU Expired - Lifetime CN202418747U (en) | 2012-01-16 | 2012-01-16 | Low-medium pressure piston check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202418747U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195952A (en) * | 2013-03-28 | 2013-07-10 | 王占奎 | Easy-maintenance check valve for fluid |
| CN103216672A (en) * | 2013-04-09 | 2013-07-24 | 西诺威阀门控制（苏州）有限公司 | Muted piston-type valve clack and check valve |
| CN104141811A (en) * | 2014-06-18 | 2014-11-12 | 浙江诚一阀门有限公司 | High-pressure piston type flow rate regulating check multifunctional valve |
| CN105443812A (en) * | 2014-08-15 | 2016-03-30 | 德维阀门铸造（苏州）有限公司 | Mute piston-type check valve |
-
2012
- 2012-01-16 CN CN201220017552XU patent/CN202418747U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195952A (en) * | 2013-03-28 | 2013-07-10 | 王占奎 | Easy-maintenance check valve for fluid |
| CN103216672A (en) * | 2013-04-09 | 2013-07-24 | 西诺威阀门控制（苏州）有限公司 | Muted piston-type valve clack and check valve |
| CN104141811A (en) * | 2014-06-18 | 2014-11-12 | 浙江诚一阀门有限公司 | High-pressure piston type flow rate regulating check multifunctional valve |
| CN105443812A (en) * | 2014-08-15 | 2016-03-30 | 德维阀门铸造（苏州）有限公司 | Mute piston-type check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120905 |