CN203176457U - Check valve - Google Patents
Check valve Download PDFInfo
- Publication number
- CN203176457U CN203176457U CN 201320176629 CN201320176629U CN203176457U CN 203176457 U CN203176457 U CN 203176457U CN 201320176629 CN201320176629 CN 201320176629 CN 201320176629 U CN201320176629 U CN 201320176629U CN 203176457 U CN203176457 U CN 203176457U
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- China
- Prior art keywords
- valve
- valve body
- embedded
- spool
- valve seat
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to a valve, in particular to a check valve, which comprises a valve cover, a valve body, a valve core and a valve seat, wherein the outer side of the valve core is embedded with a special ceramic layer, the valve seat and the valve body are embedded into a whole, an inner cavity of the valve body is embedded with a wear-resistant ceramic sheet layer, the lower side of the valve cover is provided with a graphite sealing gasket, and the valve core is provided with a buffer device. The check valve has the advantages that sealing parts and fragile parts of the valve are made of special ceramic material, so the wear-resistant performance, the anti-corrosive performance and the sealing performance are improved, the service life is greatly prolonged, the maintenance and replacement times are greatly reduced, the labor strength of workers is reduced, the maintenance cost is saved, and the production efficiency is improved; and the buffer device mainly performs the functions of protecting the ceramic valve seat and the valve cover and reducing the noise.
Description
Technical field
The utility model relates to a kind of valve, particularly a kind of safety check.
Background technique
Valve be oil, chemical industry, nonferrous metallurgy, non-ferrous metal, etc. each heavy, indispensable fluid control apparatus in light industry field, wide because of its using scope, demand big, the effect is important, is called as the throat of pipeline.At present, the valve that China's industry-by-industry generally uses in producing is metal valve, the existing history that goes up a century of the appearance of metal valve, though also pass through the improvement of structure and material during this time, but be subjected to the restriction of metallic material self-condition, more and more can not adapt to the needs of bad working environments such as high wearing and tearing, deep-etching.It is mainly reflected in the weak point in working life, reveals seriously, changes frequently, has influenced the stability of system greatly, thereby has made traditional metal valve demand urgently reforming from aspects such as material, structural design and manufacturing process.
The special cermacis valve is the product that new development is in recent years got up, it is that the anti-high wearing and tearing, the height that utilize special cermacis wash away, high temperature and characteristics such as corrosion-resistant, and be widely used in FGD desulphurization system and the storehouse pump ash disposal system of power plant, the slag stock pump system of coal washery, the flushing cinder water system of Iron And Steel Plant, the defeated slurry system of chemical industry, and each fluid control apparatus heavy, the light industry field such as non-ferrous metal.
Safety check refers to rely on medium itself to flow and automatic open and close flap, is used for preventing the valve that medium flows backwards.Claim check valve, one-way valve, reflux valve and back pressure valve again.Safety check belongs to a kind of automatic valve, and it mainly acts on is to prevent that medium from flowing backwards, preventing pump and drive motor counter-rotating, and the releasing of vessel media.
The effect of safety check is only to allow medium to flow to a direction, and stops mobile in the other direction.Common this valve is automatically work, opens at the fluid pressure action lower Disc that a direction flows, and when fluid flows in the other direction, cuts off and flows thereby act on valve seat by the flap of coincidence certainly of hydrodynamic pressure and flap.
Safety check commonly used at present has following shortcoming:
(1) valve is closed rapidly during pumping accident, causes the hole behind the valve, and the hole produces repeatedly and goes out certainly under the effect of positive and negative water hammer ripple, causes the cavitation erosion of valve, makes its lost of life.
(2) move when dumb when flap, close slowly, aqueous reflux impacts impeller and produces and fly the ease counter-rotating and destroy pumping unit.
When (3) normally moving, flap wafts in water, ceaselessly swing and vibrate, thereby flow resistance is big, friction is big, power consumption is high, the life-span is short.
Particularly under the operating mode condition of severe, these shortcomings are more obvious, in addition, also have problems such as not wear-resisting, not anticorrosion, life cycle weak point, maintenance difficult, equipment can not run well.
Summary of the invention
The purpose of this utility model just provides a kind of a kind of safety check that overcomes the prior art defective.
The technical solution of the utility model realizes that by following approach it contains valve gap, valve body, spool, valve seat, and the outside of spool is embedded with the special cermacis layer; Valve seat and valve body are set into one; Body cavity is inlaid with the wear-resistant ceramic lamella; The downside of valve gap is provided with the graphite grazing pad; And be provided with damping device at spool.
The utility model adopts special ceramic material to make sealed member and the easily worn part of valve, wear resistance, anti-corrosive properties and the sealing of valve products have been improved, prolonged the working life of valve greatly, also greatly reduce valve the maintain and replace number of times, alleviated labor strength, saved maintenance expenses, improved manufacturing efficiency.Damping device mainly plays the effect of protection ceramic valve seat, valve gap, minimizing noise.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the utility model damping device structural representation
Wherein: valve gap 1, bolt 2, graphite grazing pad 3, valve body 4, connecting plate 5, spool 7, valve seat 8, special cermacis layer 11, wear-resistant ceramic lamella 12, connecting base 13, cushion pad 14, stud bolt 15, bolt 16.
Embodiment
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.
The utility model contains valve gap 1, valve body 4, spool 7, valve seat 8, and the outside of spool 7 is embedded with special cermacis layer 11; Valve seat 8 is set into one with valve body 4; Valve body 4 inner chambers are inlaid with wear-resistant ceramic lamella 12; The downside of valve gap 1 is provided with graphite grazing pad 3; And be provided with damping device at spool 7.
Damping device contains connecting plate 5, connecting base 13 and cushion pad 14, wherein, an end of connecting plate 5 is fixed on the valve body 4, and an end is fixed on the spool 7, and connecting plate 5 is connected with connecting base 13 by stud bolt 15, and cushion pad 14 is connected with connecting base 13 by bolt 16.
The technical parameter of pottery core component (spool, valve seat):
Composition: Y-ZrO
2Density: 5.6g/m
3
Hardness: HRA〉90 resistance to flexures: 1100Mpa
Young's modulus: 180Gpa fracture toughness: 8Mpam 1/2
Body cavity paste List new special ceramic material, and it is bonding to use high bonding, high strength bonding agent to carry out, thus form an integral body, guarantee intensity and the working life of body cavity, its technical parameter:
Composition: alumina density: 4.2g/m
3
Hardness: HRA〉90 resistance to flexures: 1100Mpa
Young's modulus: 180Gpa fracture toughness: 8Mpam 1/2
High-strength, high pressure graphite grazing is adopted in sealing, and sealing reaches the usage requirement of special cermacis valve.Spool, valve seat processing grinding degree of finish reach 1.6.
Claims (2)
1. safety check, it contains valve gap (1), valve body (4), spool (7), valve seat (8), it is characterized in that, and the outside of described spool (7) is embedded with ceramic layer (11); Valve seat (8) is set into one with valve body (4); Valve body (4) inner chamber is inlaid with wear-resistant ceramic lamella (12); The downside of valve gap (1) is provided with graphite grazing pad (3); And be provided with damping device at spool (7).
2. a kind of safety check according to claim 1, it is characterized in that described damping device contains connecting plate (5), connecting base (13) and cushion pad (14), wherein, one end of connecting plate (5) is fixed on the valve body (4), one end is fixed on the spool (7), and connecting plate (5) is connected with connecting base (13) by stud bolt (15), and cushion pad (14) is connected with connecting base (13) by bolt (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320176629 CN203176457U (en) | 2013-04-10 | 2013-04-10 | Check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320176629 CN203176457U (en) | 2013-04-10 | 2013-04-10 | Check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203176457U true CN203176457U (en) | 2013-09-04 |
Family
ID=49073154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320176629 Expired - Fee Related CN203176457U (en) | 2013-04-10 | 2013-04-10 | Check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203176457U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145756A (en) * | 2020-09-07 | 2020-12-29 | 葛玉珍 | Anti-impact swing check valve |
-
2013
- 2013-04-10 CN CN 201320176629 patent/CN203176457U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145756A (en) * | 2020-09-07 | 2020-12-29 | 葛玉珍 | Anti-impact swing check valve |
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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: 20130904 Termination date: 20160410 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |