CN203770755U - Check valve - Google Patents
Check valve Download PDFInfo
- Publication number
- CN203770755U CN203770755U CN201420184362.6U CN201420184362U CN203770755U CN 203770755 U CN203770755 U CN 203770755U CN 201420184362 U CN201420184362 U CN 201420184362U CN 203770755 U CN203770755 U CN 203770755U
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- CN
- China
- Prior art keywords
- valve
- seat
- valve body
- spring
- spring seat
- 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 check valve. According to the specific structure of the check valve, the check valve comprises a valve body, a valve cavity is formed in the valve body in a hollowed mode, an inlet and an outlet of the valve cavity are formed in the surface of the valve body, a valve seat, a valve seat body, a valve element and a spring seat are arranged in the valve cavity, the valve seat body is connected to the valve body in a sliding mode and is limited in the valve cavity by the valve body, the valve seat is clamped on the valve seat body, one end of the valve element is fixedly arranged on the valve seat, and the other end of the valve element can seal the inlet of the valve cavity; the spring seat is fixedly arranged on the valve seat through a screw, a through hole is formed in the spring seat, and the valve core is arranged in the through hole in a penetrating mode; a sealing cavity is formed between the spring seat and the valve seat, a rest spring is arranged in the sealing cavity, one end of the reset spring is fixedly arranged on the spring seat, the other end of the rest spring is a free end, and the valve element is sleeved with the free end of the reset spring; a plurality of liquid discharge holes are formed in the spring seat, and are communicated with the sealing cavity.
Description
Technical field
The utility model relates to valve technology field, particularly relates to a kind of safety check.
Background technique
Safety check claims again check valve, one-way valve or check valve, and its effect is to guarantee medium directional flow in pipeline and the function of unlikely refluence.The bottom valve of water pump suction pipe also belongs to safety check class.Safety check belongs to automatic valve.Pressure 1.6 ~ 25MPa/Class150-2500/2.0-42.0MPa operating temperature-29 ~+550 ℃, material has conventionally: cast steel WCB, cast iron HT200, HT250, QT350, QT450, alloyed steel WC6, WC9, CN7M stainless steel has CF8 (M), CF3 (M). forged steel has A105, F304 (L), F316L etc. the pipeline of the various operating modes such as oil, chemical industry, pharmacy, chemical fertilizer, power industry on, Applicable media is water, oil product, steam, acid medium etc., be the valve of controlling pipeline internal medium single flow direction, be used for preventing that the medium in pipeline from flowing backwards.
In prior art, in Chinese invention patent prospectus 200810103658.X, a kind of safety check is disclosed, comprise valve seat and flap, further, described safety check comprises a damper, and this damper is arranged on valve base cavity wall, and by flexible member, be connected between its end and flap, utilize this damper, when flap approaches its closed position, it is produced to reverse resistance, slow down the closing velocity of flap, reduce the impact force to sealing surface of seat.The safety check of this invention, simple in structure, can effectively eliminate impact and water hammer between flap and sealing seat, and prevent the leakage of medium in valve pocket.
But, safety check in above-mentioned patent, spring seat is fixed on valve seat by supported spring, in the process of assembling, easily there is bite and cause fault in supported spring, cause well spring seat being installed on valve seat, and because supported spring is elastic component, in the process of assembling, also cannot guarantee to be in place completely, affected the quality of fit of spool and valve seat, in addition, in the safety check of above-mentioned patent, spring seat is owing to will often and between spool rubbing, belong to easily damaged parts, need often to change, increased cost, and in spring seat owing to there being dead angle, liquid is when by spring seat, some impurity wherein can be deposited in and on spring seat, form medium crystallization, cause when maintenance, being difficult to take off spring seat.
Model utility content
Technical problem to be solved in the utility model is to provide a kind of plate and frame type filter-press that can prevent that soiling solution from leaking out for the above-mentioned state of the art.
For achieving the above object, the utility model provides following technological scheme:
A kind of safety check, include valve body, described valve inner hollow is formed with valve pocket, offers entrance and the outlet of described valve pocket in described valve body surface, is provided with valve seat, valve body, spool and spring seat in described valve pocket, described valve body is slidably connected on described valve body, and spacing in described valve pocket by described valve body, described valve seat is connected on described valve body, and described spool one end is fixed on described valve seat, the other end can be by the inlet seal of described valve pocket
Wherein, described spring seat is fixed by screws on described valve seat, on described spring seat, offers through hole, and described spool is located in described through hole;
Between described spring seat and described valve seat, be formed with Seal cage, in described Seal cage, be provided with Returnning spring, described Returnning spring one end is fixed on described spring seat, and the other end is free end, and the free end of described Returnning spring is socketed on described spool;
On described spring seat, offer some outages, described outage and described Seal cage conducting.
Adopting the safety check of this structure, is by screw, spring seat to be directly fixed on valve seat, as rigid support, strengthened the circumferential matching gap of spring seat and cylinder body, catching phenomenon while effectively having eliminated assembling, has reduced assembling difficulty, has guaranteed spool and valve seat quality of fit; Simultaneously, in order to eliminate medium crystallization, at spring seat, circumferentially designed outage, the liquid that enters valve body enters into fast the Seal cage forming between spring seat and valve seat under the pressure-acting of water pump, owing to being provided with outage, liquid can not accumulate in Seal cage, thereby has avoided contamination precipitation in spring seat, causes difficulty when taking out.
As preferably, in the through hole of described spring seat, be provided with wear-resistant guiding cover, described spool is located in described wear-resistant guiding cover.
Adopt the safety check of this structure, when wearing and tearing are when excessive, only need to change wear-resistant guiding cover, and not need whole spring seat to change, thereby extended working life of spring seat, reduced cost.
As improvement, on described valve body, be connected with fastening flange, on described fastening flange, be provided with dish spring, described valve body one end is positioned at valve pocket, and the other end protrudes and extends in outside described valve body, and offsets with described dish spring.
Dish spring is belleville spring, has another name called Beile Wei Er spring washer, adopts the safety check of this structure, can when valve body slides, play the effect of a bumper and absorbing shock, prevents that valve body and fastening flange generation direct collision from causing wearing and tearing or distortion.
As concrete technological scheme, on described valve seat, offer tapped hole, on described spring seat, offer with described tapped hole over against positioning hole,, in described positioning hole and described tapped hole, be equipped with screw.
On spring seat, offer positioning hole, can easily screw be located in tapped hole from positioning hole, make assembling more simple and accurate.
As improvement, described valve body is Hastelloy valve body, goes for the environment of severe corrosive, and this just makes this valve body go for the liquid of some severe corrosives.
Compared with prior art, the utility model has the advantage of: by screw, spring seat is directly fixed on valve seat, as rigid support, strengthened the circumferential matching gap of spring seat and cylinder body, catching phenomenon while effectively having eliminated assembling, reduce assembling difficulty, guaranteed spool and valve seat quality of fit; Simultaneously, at spring seat, circumferentially designed outage, the liquid that enters valve body enters into fast the Seal cage forming between spring seat and valve seat under the pressure-acting of water pump, owing to being provided with outage, liquid can not accumulate in Seal cage, thereby avoided contamination precipitation in spring seat, caused difficulty when taking out.
accompanying drawing explanation
Fig. 1 is the structural representation of safety check in the utility model embodiment.
Reference character:
1, valve body; 2, valve pocket; 2.1, valve pocket entrance; 2.2, valve pocket outlet; 3, valve seat; 3.1, protruding block; 4, valve body; 4.1, draw-in groove; 5, spool; 6, spring seat; 6.1, outage; 7, screw; 8, wear-resistant guiding cover; 9, Seal cage; 9.1, Returnning spring; 10, fastening flange; 11, dish spring.
Embodiment
Below in conjunction with accompanying drawing embodiment, safety check of the present utility model is described in further detail.
As shown in Figure 1, the present embodiment is a kind of safety check, include valve body 1, described valve inner hollow is formed with valve pocket 2, in described valve body surface, offer the entrance 2.1 and outlet 2.2 of described valve pocket, in described valve pocket, be provided with valve seat 3, valve body 4, spool 5 and spring seat 6, described valve body is slidably connected on described valve body, and spacing in described valve pocket by described valve body, described valve seat border is formed with protruding block 3.1, on valve body, offer the draw-in groove 4.1 with above-mentioned protruding block adaptation, cooperation by protruding block and draw-in groove is connected to above-mentioned valve seat on valve body, described spool one end is fixed on described valve seat, the other end is processed to a discoid piston head, the size of the geomery of this piston head and the entrance of valve pocket 2.1 is close, in piston head is subject to by valve pocket during the impact of current, can rapidly the entrance of valve pocket 2.1 be sealed up, the current that prevent from entering in valve pocket flow backwards again, played the effect of non-return.
Wherein, described spring seat is fixed on described valve seat by screw 7, on described valve seat, offers tapped hole, on described spring seat, offer with described tapped hole over against positioning hole, then screw is inserted from positioning hole, until be inserted in tapped hole, thereby spring seat is fixed on valve seat.Owing to being provided with positioning hole, this just makes when assembling more accurately with quick.In addition, by screw, spring seat is directly fixed on valve seat, as rigid support, has strengthened the circumferential matching gap of spring seat and cylinder body, the catching phenomenon while effectively having eliminated assembling, has reduced assembling difficulty, has guaranteed spool and valve seat quality of fit.
On described spring seat 6, offer through hole, on through hole, fixed a wear-resistant guiding cover 8, then spool 5 is worn among above-mentioned wear-resistant guiding cover 8.Owing to being provided with wear-resistant guiding cover, avoided direct contact the between spool 5 and spring seat 6, when wearing and tearing are excessive, only need to change wear-resistant guiding cover 8, and do not need whole spring seat to change, thereby extended working life of spring seat, reduced cost.
Between described spring seat and described valve seat, be formed with Seal cage 9, in described Seal cage, be provided with Returnning spring 9.1, described Returnning spring one end is fixed on described spring seat, the other end is free end, the free end of described Returnning spring is socketed on described spool, when not working, while there is no liquid in valve body, Returnning spring can drive spool to automatically reset.
On described spring seat, offer some outages 6.1, described outage and described Seal cage conducting.At spring seat, circumferentially designed outage, the liquid that enters valve body enters into fast the Seal cage forming between spring seat and valve seat under the pressure-acting of water pump, owing to being provided with outage, liquid can not accumulate in Seal cage, thereby avoided contamination precipitation in spring seat, caused difficulty when taking out.
On described valve body 1, be connected with fastening flange 10, be provided with dish spring 11 on described fastening flange, described valve body one end is positioned at valve pocket, and the other end protrudes and extends in outside described valve body, and offsets with described dish spring.
Dish spring 11 is belleville spring, has another name called Beile Wei Er spring washer, can when valve body slides, play the effect of a bumper and absorbing shock, prevents that valve body 4 and fastening flange 10 from direct collision occurring and cause wearing and tearing or distortion.
Described valve body is Hastelloy valve body, goes for the environment of severe corrosive, and this just makes this valve body go for the liquid of some severe corrosives.
The above is only preferred implementation of the present utility model, and protection domain of the present utility model is also not only confined to above-described embodiment, and all technological schemes belonging under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, in the some improvements and modifications that do not depart under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. a safety check, include valve body, described valve inner hollow is formed with valve pocket, offers entrance and the outlet of described valve pocket in described valve body surface, is provided with valve seat, valve body, spool and spring seat in described valve pocket, described valve body is slidably connected on described valve body, and spacing in described valve pocket by described valve body, described valve seat is connected on described valve body, and described spool one end is fixed on described valve seat, the other end can be by the inlet seal of described valve pocket
It is characterized in that: described spring seat is fixed by screws on described valve seat, on described spring seat, offers through hole, described spool is located in described through hole;
Between described spring seat and described valve seat, be formed with Seal cage, in described Seal cage, be provided with Returnning spring, described Returnning spring one end is fixed on described spring seat, and the other end is free end, and the free end of described Returnning spring is socketed on described spool;
On described spring seat, offer some outages, described outage and described Seal cage conducting.
2. safety check according to claim 1, is characterized in that: in the through hole of described spring seat, be provided with wear-resistant guiding cover, described spool is located in described wear-resistant guiding cover.
3. safety check according to claim 1 and 2, it is characterized in that: on described valve body, be connected with fastening flange, be provided with dish spring on described fastening flange, described valve body one end is positioned at valve pocket, the other end protrudes and extends in outside described valve body, and offsets with described dish spring.
4. safety check according to claim 3, is characterized in that: on described valve seat, offer tapped hole, on described spring seat, offer with described tapped hole over against positioning hole, in described positioning hole and described tapped hole, be equipped with screw.
5. safety check according to claim 1, is characterized in that: described valve body is Hastelloy valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420184362.6U CN203770755U (en) | 2014-04-16 | 2014-04-16 | Check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420184362.6U CN203770755U (en) | 2014-04-16 | 2014-04-16 | Check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203770755U true CN203770755U (en) | 2014-08-13 |
Family
ID=51287946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420184362.6U Expired - Fee Related CN203770755U (en) | 2014-04-16 | 2014-04-16 | Check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203770755U (en) |
-
2014
- 2014-04-16 CN CN201420184362.6U patent/CN203770755U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20160416 |