CN202580148U

CN202580148U - Check valve

Info

Publication number: CN202580148U
Application number: CN 201220175896
Authority: CN
Inventors: 汤学俊
Original assignee: YONGJIA LIANBANG VALVE CO Ltd
Current assignee: YONGJIA LIANBANG VALVE CO Ltd
Priority date: 2012-04-23
Filing date: 2012-04-23
Publication date: 2012-12-05
Anticipated expiration: 2022-04-23

Abstract

The utility model discloses a check valve, which comprises a valve body, a valve clack, an upper valve shaft, a lower valve shaft, a doubly-twisted spring, an independent stop block or a self-locking stop block, a shaft seat and a tightening screw. The valve clack, the upper valve shaft, the lower valve shaft, the doubly-twisted spring and the shaft seat are mutually sleeved with one another into a whole are embedded through the independent stop block or the self-locking stop block and the tightening screw and fixedly installed inside a valve body limiting groove. The check valve is an embedded retainer-ring-free structure after being improved, and a structural component of the valve clack the upper valve shaft, the lower valve shaft, the doubly-twisted spring and shaft seat is embedded and fixed through the tightening screw and the independent stop block or the self-locking stop block. Through the design of the retainer-ring-free structure, a leakage point (a screw hole on the appearance of the valve body) caused by the weakness of the machining process of the original structure design can be eliminated, the tightness of the valve body and the safety when the valve body is used in a working condition environment can be improved, and more convenience in installation and maintenance can be realized. Through the further structural improvement, the check valve also has advantages of good fixture performance, long service life, reasonability ins structural stress, difficulty in damage and the like.

Description

Safety check

Technical field

The utility model relates to a kind of safety check, is used to prevent that pipeline internal medium from flowing backwards, and belongs to pipeline fluid device field.

Background technique

Safety check is one of valve commonly used in pipework, is used for preventing in the pipework that the medium in the pipeline from flowing backwards.Safety check is a kind of automatic valve that relies on the pressure medium opening and closing, is mainly used on the pipeline of medium one-way flow (only to allow medium to flow to a direction), to try to avert accidents.Therefore the structural design of safety check itself designs irrational safety check and will use the formation potential safety hazard to engineering its performance, working life etc. having material impact.

Common in the market safety check; Its structure is by valve body, valve shaft, spring, flap, fixedly plug screw, back-up ring are formed, and valve shaft runs through and is fixed on the valve body, and two ends are with plug screw and back-up ring fixing seal; This sealing structure poor performance; Be prone to cause leak, cause potential safety hazard, can't re-use thereby make safety check damage perhaps.Existing safety check, when its flap unlatching face was opened, the direct active force of two flaps was prone to cause valve shaft, flap to damage or distortion on valve shaft; And its flap is planar design, and it is poor that it bears dynamics, and flow resistance coefficient is big.Fragile flap.And structure member is installed, dismounting is loaded down with trivial details.

Summary of the invention

Defective to existing technology; The utility model discloses a kind of safety check,, eliminated the leakage point of original valve body through architecture advances; And prevented the deformed damaged of flap, upper and lower valve shaft; Effectively improved the working life of safety check, thereby effectively increased the reliability that safety check uses, it is convenient to install, dismantle maintenance simultaneously.

For realizing above-mentioned purpose, the utility model is realized through following technical proposals:

Safety check; Comprise valve body, flap, go up valve shaft, lower valve shaft, torsion spring, independent block or self-locking block, axle bed and screw; Wherein flap, last valve shaft, lower valve shaft, torsion spring, axle bed overlap each other and are installed in one; Wherein go up valve shaft, lower valve shaft is socketed on the axle bed, be built on the valve body restraining groove; Last valve shaft, lower valve shaft and axle bed are directly fixing or be embedded in valve inner and fix with independent block or self-locking block and screw.

Wherein independent block or self-locking the block fixedly structure of axle bed comprise following two kinds of situation: said independent block places on the axle bed, is embedded in valve inner and fixes on valve body with screw.Said self-locking block places on the axle bed, with the direct fixing axle bed on the self-locking block of screw.

Wherein, saidly go up valve shaft, lower valve shaft socket-connects in axle bed, be fixed on the inner chamber restraining groove of valve body with independent block or self-locking block and screw.

Through so no back-up ring mounting structure, increased the sealing of valve body, eliminated the leakage point (being created in the screw hole of valve body appearance) of original structure Design and Machining defective workmanship, increased the valve body overall tightness.And easy to maintenance, when needing repairing, only need open screw and block or self-locking block just can directly take out a whole set of parts, has effectively saved maintenance cost and time.

Wherein, on the said torsion spring one end socket lower valve shaft, an end is socketed on the valve shaft.

Through the torsion spring structure, making has an independent torsion spring effect on the flap, optimized the rate of closing of flap; Especially when medium flow resistance friction factor is uneven; Guaranteed that stress remains on the level, increased the working life of torsion spring, and increased the stationarity of valve shaft; Reduced the distortion of valve shaft, thereby played protective action valve shaft because of active force.The physics elasticity of torsion spring itself can form certain counteracting to the amplitude of vibrations when having vibrations to take place, and makes energy and amplitude that vibrations shake when arriving valve shaft all greatly reduce, thereby has protected valve shaft.

Wherein, said flap is the arch flap, is fixed on the lower valve shaft through the axle ear.Through adopting arch structure to enlarge the lifting surface area of flap, impact power has played certain buffer function, thereby flap has been played protective action, has increased the whole strength of safety check, and performance is more superior.

Further, on the basis of the above, said arch flap is connected with torsion spring through lower valve shaft, closes rapidly through the auxiliary arch flap of torsion spring booster action.

Further, the arcuate surface of said arch flap is provided with buffer.When unlatching face is opened; The buffer of two flaps is close to each other and is not acted directly on the valve shaft, makes active force cancel out each other, and reduces resonance and water hammer; Thereby played the effect of protecting flap, valve shaft, avoided flap, valve shaft distortion under medium effect bump.

Further, said arch stress surface is provided with the curved backflow face of arc.When flap is closed, can increase the backflow area, strengthen whole stressed dynamics, more can be rapidly, quick throttle down.

Improve through said structure, the safety check of the utility model has effectively been eliminated the leakage point of original valve body structure Design and Machining defective workmanship, has strengthened the sealing of valve body, has prevented under extraneous unfavorable factor, to cause the dielectric leakage in the pipeline.And improved the working life of flap, valve shaft, thereby effectively increased the reliability that safety check uses, and the safety check of the utility model is for ease of maintenaince.Practiced thrift raw material simultaneously, reduced cost.

Description of drawings

Fig. 1 is the utility model check valve structure schematic representation;

Fig. 2 is the utility model safety check part-structure schematic representation;

Fig. 3 a-3d is sectional view, plan view, lateral plan, the rear view of flap.

Embodiment

Can better understand the invention essence of the utility model with reference to accompanying drawing; It will be appreciated by those skilled in the art that accompanying drawing and following specific embodiments are merely a kind of more preferably implementation of the utility model, common variation that those skilled in the art carry out on the basis of understanding the utility model technological scheme essence and replacement all should be included in the protection domain of the utility model.

With reference to figure 1, Fig. 2; The safety check of the utility model; Comprise valve body 1, go up valve shaft 2, torsion spring 3, independent block 4, flap 5, axle bed 10, lower valve shaft 6 and screw 7; Wherein flap 5, go up valve shaft 2, lower valve shaft 6, torsion spring 3, axle bed 10 each other cover be installed in one, be embedded in valve inner and screw 7 directly valve body 1 built-in being fixedly installed in the valve body restraining groove 13 with independent block 4.

Wherein, torsion spring 3 one ends are socketed on the lower valve shaft 6, and an end is socketed on the valve shaft 2.

With reference to figure 3a-3d (A representes that A-A is to view among the figure), flap 5 is two, and the position is symmetrical, all is arch flaps, is socketed on the lower valve shaft 6 with axle ear 12, closes through torsion spring 3 auxiliary two arch flaps.

Wherein, the arcuate surface of arch flap 5 is provided with buffer 9, and when flap was opened, the buffer of two flaps was close to each other.

Wherein, the arcuate surface of arch flap 5 is provided with backflow face 11.

Claims

1. safety check; Comprise valve body, flap, go up valve shaft, lower valve shaft, torsion spring, independent block or self-locking block, axle bed and screw; Wherein flap, last valve shaft, lower valve shaft, torsion spring, axle bed overlap each other and are installed in one; It is characterized in that valve shaft, lower valve shaft are socketed on the axle bed, be built on the valve body restraining groove; Last valve shaft, lower valve shaft and axle bed are directly fixing or be embedded in valve inner and fix with independent block or self-locking block and screw.

2. safety check according to claim 1 is characterized in that saidly going up valve shaft, lower valve shaft socket-connects in axle bed, is fixed on the inner chamber restraining groove of valve body with independent block or self-locking block and screw.

3. safety check according to claim 1 is characterized in that said torsion spring one end is socketed on the lower valve shaft, and an end is socketed on the valve shaft.

4. safety check according to claim 1 is characterized in that said flap is the arch flap, is connected on the lower valve shaft with the axle ear muff.

5. safety check according to claim 4 is characterized in that said arch flap and lower valve shaft, torsion spring socket, closes through the auxiliary arch flap of torsion spring.

6. safety check according to claim 5 is characterized in that the arcuate surface of said arch flap is provided with buffer.

7. safety check according to claim 5 is characterized in that the arcuate surface of said arch flap is provided with backflow face.