CN203146937U - Vacuum anti-backflow safety valve - Google Patents
Vacuum anti-backflow safety valve Download PDFInfo
- Publication number
- CN203146937U CN203146937U CN 201320163376 CN201320163376U CN203146937U CN 203146937 U CN203146937 U CN 203146937U CN 201320163376 CN201320163376 CN 201320163376 CN 201320163376 U CN201320163376 U CN 201320163376U CN 203146937 U CN203146937 U CN 203146937U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve seat
- sealing face
- sealing
- flap
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 57
- 210000004907 gland Anatomy 0.000 claims abstract description 9
- 239000007769 metal material Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 5
- 238000011010 flushing procedure Methods 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 230000008676 import Effects 0.000 description 4
- 230000003116 impacting effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
Images
Landscapes
- Lift Valve (AREA)
Abstract
The utility model relates to a vacuum anti-backflow safety valve. The vacuum anti-backflow safety valve comprises a valve body, a valve seat, a valve clack, a back-flushing disc, a valve cover, a valve rod and a spring. A valve seat sealing face is mainly composed of a plane sealing face at the upper end and a conic sealing face on the inner side of the plane sealing face. A dual-seal structure is adopted in a valve clack sealing face and is composed of a valve clack metal sealing face, a rubber sealing ring and a gland. The rubber sealing ring is installed inside the valve clack metal sealing face through the gland, the valve clack metal sealing face is matched with the plane sealing face at the upper end of the valve seat, and the rubber sealing ring is matched with the conic sealing face on the valve seat. The vacuum anti-backflow safety valve has the advantages of being good in seal performance, capable of preventing media from flowing back and the like, and furthermore, is suitable for overpressure protective devices of pressure containers.
Description
Technical field
The utility model belongs to valve field, particularly about a kind of safety valve.The utility model is applicable to the overpressure protector of pressurized container.
Background technique
Safety valve is installed on the pipeline equal pressure container and prevents system overpressure, the safety of protection equipment.The spring Fall lift safety valve is a kind of structural type of more generally using, its structure comprises valve body, valve seat, flap, Disc holder, valve rod, spring, and valve seat is provided with Adjusting ring, and the valve rod lower end is installed in center, the Disc holder back side, spring is installed on the valve rod, sets the cracking pressure of flap.Flap and valve seat have the sealing surface that cooperatively interacts, and its sealing configuration is by hard sealing and two kinds of seal form of soft seal.Described hard seal form is the structural type that flap and sealing surface of seat adopt the metal sealing; The soft seal form is the seal form that rubber flap and metal seat valve cooperatively interact.Its major defect is that safety valve outlet port medium is entered in pressurized container or the pipeline by suck-back easily, the medium in pressurized container or the pipeline is polluted the anti-back flow poor performance when the negative pressure operating mode appears in pressurized container or pipeline.
Summary of the invention
The purpose of this utility model is the shortcoming that exists at prior art, provides a kind of and can prevent that the external agency refluence from entering in pressurized container or the pipeline vacuum anti-back flow safety valve of good seal performance.
The technical solution of the utility model comprises valve body, valve seat, flap, Disc holder, valve gap, valve rod, spring, valve seat adopts metallic material to be fixedly mounted in the valve body inlet passage by screw thread, the valve seat upper end is provided with Adjusting ring, the valve rod lower end is installed in center, the Disc holder back side, the upper end is connected with the nut thread of adjusting, spring is installed on the valve rod, mainly be that sealing surface of seat is made up of the plane sealing face of upper end and conical seal (contact) face two-part of this plane sealing face inboard, the flap sealing surface adopts double sealing structure, this double sealing structure is by the flap metallic sealing section, rubber seal and gland are formed, rubber seal is installed in flap metallic sealing section inboard by gland, the plane sealing face of flap metallic sealing section and valve seat upper end cooperatively interacts, and the conical seal (contact) face on rubber seal and the valve seat cooperatively interacts.
The utility model has the advantages that the flap sealing surface adopts double sealing structure, when valve seat import malleation, plane sealing face fitted seal by flap metallic sealing section and valve seat upper end, when valve seat import negative pressure, by the conical seal (contact) face fitted seal on rubber seal and the valve seat, and along with the increase of negative pressure, the impacting force between rubber seal and the valve seat is along with increase, have good seal performance, can prevent characteristics such as medium refluence.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the partial enlarged drawing at I place among the utility model Fig. 1.
Embodiment
Vacuum anti-back flow safety valve as shown in Figure 1, comprise valve body 1, valve seat 2, flap 9, Disc holder 10, valve gap 4, valve rod, spring, valve seat 2 adopts metallic material to be fixedly mounted in valve body 1 inlet passage by screw thread, valve seat 2 upper ends are provided with Adjusting ring, this Adjusting ring is by being threaded in valve seat 2 upper ends, the valve rod lower end is installed in center, Disc holder 10 back side, the upper end is connected with the nut thread of adjusting, the nut of adjusting is fixedly mounted in valve gap 4 upper-end surfaces, valve gap 4 upper-end surfaces are provided with dust-proof cover 5, prevent that dust from entering in the nut of adjusting, the back side of Disc holder 10 and guide sleeve 3 motive sealings are connected, and guide sleeve 3 upper end fixing seals are installed between valve body 1 and the valve gap 4.Spring is installed on the valve rod, be provided with spring seat in two ends up and down at spring, valve seat 2 sealing surfaces are made up of the plane sealing face of upper end and conical seal (contact) face two-part of this plane sealing face inboard, flap 9 sealing surfaces adopt double sealing structure, this double sealing structure is made up of flap 9 metallic sealing sections, rubber seal 8 and gland 7, rubber seal 8 is installed in flap 9 metallic sealing section inboards by gland 7, and gland 7 is fixedly mounted in flap 9 lower planes by screw 6.The plane sealing face of flap 9 metallic sealing sections and valve seat 2 upper ends cooperatively interacts, and constitutes hard sealing structure between the two, when valve seat 2 import malleations, by the plane sealing face fitted seal of flap 9 metallic sealing sections and valve seat 2 upper ends.Conical seal (contact) face on rubber seal 8 and the valve seat 2 cooperatively interacts, constitute soft sealing structure between the two, when valve seat 2 import negative pressure, by the conical seal (contact) face fitted seal on rubber seal 8 and the valve seat 2, and along with the increase of negative pressure, impacting force between rubber seal 8 and the valve seat 2 prevents that along with increase medium from flowing backwards.
Claims (1)
1. vacuum anti-back flow safety valve, comprise valve body (1), valve seat (2), flap (9), Disc holder (10), valve gap (4), valve rod, spring, valve seat (2) adopts metallic material to be fixedly mounted in valve body (1) inlet passage by screw thread, valve seat (2) upper end is provided with Adjusting ring, the valve rod lower end is installed in Disc holder (10) center, the back side, the upper end is connected with the nut thread of adjusting, spring is installed on the valve rod, it is characterized in that valve seat (2) sealing surface is made up of conical seal (contact) face two-part of the plane sealing face of upper end and this plane sealing face inboard, flap (9) sealing surface adopts double sealing structure, this double sealing structure is by flap (9) metallic sealing section, rubber seal (8) and gland (7) are formed, rubber seal (8) is installed in flap (9) metallic sealing section inboard by gland (7), the plane sealing face of flap (9) metallic sealing section and valve seat (2) upper end cooperatively interacts, and the conical seal (contact) face on rubber seal (8) and the valve seat (2) cooperatively interacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320163376 CN203146937U (en) | 2013-03-19 | 2013-03-19 | Vacuum anti-backflow safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320163376 CN203146937U (en) | 2013-03-19 | 2013-03-19 | Vacuum anti-backflow safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203146937U true CN203146937U (en) | 2013-08-21 |
Family
ID=48974461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320163376 Expired - Fee Related CN203146937U (en) | 2013-03-19 | 2013-03-19 | Vacuum anti-backflow safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203146937U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968113A (en) * | 2013-09-16 | 2014-08-06 | 北京航天动力研究所 | Low-pressure large-diameter safety valve |
| CN104180033A (en) * | 2014-08-01 | 2014-12-03 | 浙江恒华阀门有限公司 | Piston balanced type pressure releasing valve |
| CN104455496A (en) * | 2014-10-30 | 2015-03-25 | 北京航天动力研究所 | Conical surface soft sealing structure for safety valve |
| CN110594460A (en) * | 2019-09-09 | 2019-12-20 | 昆山海芯机电科技有限公司 | A Diesel Engine Hard Seal Fuel Back Pressure Valve |
-
2013
- 2013-03-19 CN CN 201320163376 patent/CN203146937U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968113A (en) * | 2013-09-16 | 2014-08-06 | 北京航天动力研究所 | Low-pressure large-diameter safety valve |
| CN103968113B (en) * | 2013-09-16 | 2017-02-01 | 北京航天动力研究所 | Low-pressure large-diameter safety valve |
| CN104180033A (en) * | 2014-08-01 | 2014-12-03 | 浙江恒华阀门有限公司 | Piston balanced type pressure releasing valve |
| CN104455496A (en) * | 2014-10-30 | 2015-03-25 | 北京航天动力研究所 | Conical surface soft sealing structure for safety valve |
| CN110594460A (en) * | 2019-09-09 | 2019-12-20 | 昆山海芯机电科技有限公司 | A Diesel Engine Hard Seal Fuel Back Pressure Valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203146937U (en) | Vacuum anti-backflow safety valve | |
| CN205260244U (en) | Small -size acidizing fracturing plunger pump | |
| CN203857059U (en) | Novel stop valve | |
| CN206377285U (en) | A kind of cutoff valve with high sealing performance | |
| CN105757297B (en) | Multi-functional self-operated type shut-off valve | |
| CN205278506U (en) | Novel resistant high pressure isolating valve | |
| CN202392197U (en) | High pressure axial-flow type check valve | |
| CN205298604U (en) | Manual wafer valve of high pressure resistant performance | |
| CN204729355U (en) | A kind of filtrating equipment with safety check | |
| CN204083381U (en) | A kind of to folder rotary-open type single-plate check valve | |
| CN204061969U (en) | Dress formula fixing ball valve in one | |
| CN204062141U (en) | A kind of H type valve seat shape metallic leak-proof structure | |
| CN211202914U (en) | Multifunctional valve | |
| CN202371240U (en) | Soft seal safety valve | |
| CN207393983U (en) | A kind of high pressure self-tightening type shut-off valve for reverse direction flow medium | |
| CN207093819U (en) | A kind of elastic sealing gate valve | |
| CN206246702U (en) | A kind of two-way butterfly valve | |
| CN202327175U (en) | Ball valve | |
| CN219588125U (en) | Flange type pneumatic butterfly valve | |
| CN203431252U (en) | Light-weight check valve | |
| CN205715832U (en) | Multi-functional self-operated type stop valve | |
| CN204512477U (en) | Pressure self-sealing stop valve | |
| CN204187065U (en) | A kind of medical equipment cleaning systems safety valve | |
| CN101975293B (en) | Micro pressure check valve | |
| CN204083315U (en) | A kind of soft sealing plug valve with filter screen |
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: 20130821 Termination date: 20190319 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |