CN201795105U - Micro-resistance check valve - Google Patents
Micro-resistance check valve Download PDFInfo
- Publication number
- CN201795105U CN201795105U CN2010205382974U CN201020538297U CN201795105U CN 201795105 U CN201795105 U CN 201795105U CN 2010205382974 U CN2010205382974 U CN 2010205382974U CN 201020538297 U CN201020538297 U CN 201020538297U CN 201795105 U CN201795105 U CN 201795105U
- Authority
- CN
- China
- Prior art keywords
- seal ring
- valve
- flap
- sealing ring
- valve body
- 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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Abstract
The utility model discloses a micro-resistance check valve. The valve comprises a valve body, a valve seat, a valve rod, a valve flap, a spring and a sealing device, wherein the sealing device comprises a sealing ring, a sealing ring base and a sealing ring gland; a hard alloy is overlaid on the circumferential surface of the valve flap corresponding to the sealing device; the internal structure of the sealing ring is formed by laminating and combining stainless steel and flexible graphite at intervals; the sealing ring with a composite structure is difficult to damage when worn by a particle medium and the like, and the applicable temperature of the sealing ring is improved to between -29 and 425 DEG C from between -29 and 150 DEG C; meanwhile, the hard alloy is overlaid on the circumferential surface of the valve flap corresponding to the sealing device, so that the hard alloy overlaid on the valve flap also can have secondary sealing function on the valve flap even if the sealing ring is slightly worn; therefore, the sealing effect of the sealing ring is greatly improved, the sealing performance of the micro-resistance check valve is more reliable, and the service life of the micro-resistance check valve is further prolonged.
Description
Technical field
The utility model relates to a kind of valve, especially a kind of little resistance safety check.
Background technique
At present, the seal ring of traditional little resistance safety check generally adopts polytetrafluoroethylmaterial material to make, though can play the effect of sealing, but the seal ring of this material belongs to soft seal, if there is granule medium in the flowing medium, is easy to damage seal ring, make it lose sealing effect, the seal ring Applicable temperature scope of polytetrafluoroethylmaterial material is little simultaneously, generally only is applicable to-29 ℃ to 150 ℃, is difficult to satisfy client's demand.
Summary of the invention
At the deficiencies in the prior art, the utility model provides a kind of sealing effect better, little resistance safety check that the Applicable temperature scope is bigger.
For achieving the above object, the utility model provides a kind of little resistance safety check, comprise valve body, valve seat, valve rod, flap, spring, seal arrangement, valve seat is contained in the valve body, valve rod is located in the valve seat, flap is fixed on the valve rod, be provided with spring between valve seat and the flap, be provided with seal arrangement between flap and the valve body, described seal arrangement comprises seal ring, the seal ring base, the seal ring gland, seal ring base and seal ring gland are located at the seal ring both sides respectively, and in order to fixed seal ring, built-up welding has cemented carbide on the circumferential surface of the corresponding seal arrangement of described flap.
The utility model can further be set to described seal ring, and its internal structure is by stainless steel and the Expanded graphite space is stacked combines.
The extending end that the utility model also can further be set to the seal ring gland is located at the outside of seal ring base, between the extending end of seal ring gland and the seal ring base by the screw thread secure fit.
The utility model also can further be set to also be provided with the plug screw that is used for fixing seal arrangement in the valve body, passes through the screw thread secure fit between described plug screw and the valve body.
The beneficial effects of the utility model are: owing to replaced the soft seal circle of original teflon with the stacked seal ring that combines of stainless steel and Expanded graphite space, make seal ring when being subjected to wearing and tearing such as granule medium, be difficult for being damaged, also make the Applicable temperature scope of seal ring bring up to-29 ℃ to 425 ℃ by original-29 ℃ to 150 ℃, while is pile-up welding hard alloy on the circumferential surface of the corresponding seal arrangement of flap, even seal ring is subjected to mild wear like this, the cemented carbide of built-up welding on flap also can play the secondary seal effect to flap, improved the sealing effect of seal ring greatly, make the sealability of little resistance safety check more reliable, also further prolonged the working life of little resistance safety check.
Description of drawings
Fig. 1 is a sectional view of the present utility model;
Fig. 2 is the I portion enlarged view of Fig. 1.
Embodiment
As Fig. 1, provided a kind of little resistance safety check shown in 2, comprise valve body 1, valve seat 2, valve rod 3, flap 4, spring 5, seal arrangement 6, valve seat 2 is contained in the valve body 1, one end 31 of valve rod 3 is located in the valve seat 2, flap 4 is fixed on the other end 32 of valve rod 3, be provided with spring 5 between valve seat 2 and the flap 4, be provided with seal arrangement 6 between flap 4 and the valve body 1, described seal arrangement 6 comprises seal ring 61, seal ring base 62, seal ring gland 63, seal ring base 62 is located at seal ring 61 both sides respectively with seal ring gland 63, in order to fixed seal ring 61, the extending end 631 of seal ring gland 63 is located at the outside of seal ring base 62, passes through the screw thread secure fit between the extending end 631 of seal ring gland 63 and the seal ring base 62.Built-up welding has cemented carbide 7 on the circumferential surface of described flap 4 corresponding seal arrangements 6.Described seal ring 61, its internal structure are by stacked the combining of stainless steel 611 and Expanded graphite 612 spaces.Also be provided with the plug screw 8 that is used for fixing seal arrangement 6 in the valve body 1, pass through the screw thread secure fit between described plug screw 8 and the valve body 1.
Owing to replaced the soft seal circle of original teflon with the stacked seal ring that combines 61 of stainless steel 611 and Expanded graphite 612 spaces, make seal ring 61 when being subjected to wearing and tearing such as granule medium, be difficult for being damaged, also make the Applicable temperature scope of seal ring 61 bring up to-29 ℃ to 425 ℃ by original-29 ℃ to 150 ℃, while pile-up welding hard alloy 7 on the circumferential surface 41 of flap 4 corresponding seal arrangements 6, even seal ring 61 is subjected to mild wear like this, the cemented carbide 7 of built-up welding on flap 4 also can play the secondary seal effect to flap 4, improved the sealing effect of seal ring 61 greatly, make the sealability of little resistance safety check more reliable, also further prolonged the working life of little resistance safety check.
Claims (5)
1. little resistance safety check, comprise valve body, valve seat, valve rod, flap, spring, seal arrangement, valve seat is contained in the valve body, valve rod is located in the valve seat, flap is fixed on the valve rod, be provided with spring between valve seat and the flap, be provided with seal arrangement between flap and the valve body, it is characterized in that: described seal arrangement comprises seal ring, seal ring base, seal ring gland, seal ring base and seal ring gland are located at the seal ring both sides respectively, in order to fixed seal ring, built-up welding has cemented carbide on the circumferential surface of the corresponding seal arrangement of described flap.
2. little resistance safety check according to claim 1 is characterized in that: described seal ring, its internal structure are by stainless steel and the Expanded graphite space is stacked combines.
3. little resistance safety check according to claim 1 and 2, it is characterized in that: the extending end of seal ring gland is located at the outside of seal ring base, passes through the screw thread secure fit between the extending end of seal ring gland and the seal ring base.
4. little resistance safety check according to claim 1 and 2 is characterized in that: also be provided with the plug screw that is used for fixing seal arrangement in the valve body, pass through the screw thread secure fit between described plug screw and the valve body.
5. little resistance safety check according to claim 3 is characterized in that: also be provided with the plug screw that is used for fixing seal arrangement in the valve body, pass through the screw thread secure fit between described plug screw and the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205382974U CN201795105U (en) | 2010-09-21 | 2010-09-21 | Micro-resistance check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205382974U CN201795105U (en) | 2010-09-21 | 2010-09-21 | Micro-resistance check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201795105U true CN201795105U (en) | 2011-04-13 |
Family
ID=43850013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205382974U Expired - Fee Related CN201795105U (en) | 2010-09-21 | 2010-09-21 | Micro-resistance check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201795105U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587900A (en) * | 2015-12-22 | 2016-05-18 | 苏州捷和实业有限公司 | Combined type check valve |
| CN109838579A (en) * | 2019-03-19 | 2019-06-04 | 常州亚泓环保科技有限公司 | The global valve of metallic multilayer |
-
2010
- 2010-09-21 CN CN2010205382974U patent/CN201795105U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587900A (en) * | 2015-12-22 | 2016-05-18 | 苏州捷和实业有限公司 | Combined type check valve |
| CN105587900B (en) * | 2015-12-22 | 2017-12-22 | 苏州捷和实业有限公司 | A kind of combined type non-return valve |
| CN109838579A (en) * | 2019-03-19 | 2019-06-04 | 常州亚泓环保科技有限公司 | The global valve of metallic multilayer |
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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: 20110413 Termination date: 20140921 |
|
| EXPY | Termination of patent right or utility model |