CN201844072U

CN201844072U - Steel ball type check valve

Info

Publication number: CN201844072U
Application number: CN2010206099164U
Authority: CN
Inventors: 黄小燕; 王健能
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-11-16
Filing date: 2010-11-16
Publication date: 2011-05-25
Anticipated expiration: 2020-11-16

Abstract

The utility model discloses a steel ball type check valve which comprises a valve seat and a valve body, wherein the valve body is internally provided with a spring seat, a clamp spring, a return spring and a steel ball, a sealing rubber pad is arranged in the valve seat, a limiting sheet is arranged between the steel ball and the sealing rubber pad, a middle hole is arranged on the limiting sheet, and the outer surface of the steel ball is contacted with the limiting sheet and the edge of the middle hole of the sealing rubber pad in a stepped way. The steel ball is limited in a fixed range, and the sealing rubber is subjected to certain pressure instead of bearing high pressure directly, therefore, the sealing rubber is not deformed or aged by long-term action of high temperature and high pressure, further, the service life is prolonged and maintenance is reduced. Only one check valve needs to be installed, therefore, the cost is reduced. When the pressure of a water pump impacts the check valve, the steel ball rotates and brings the inside dirt out; the sealing performance can be maintained to be good, therefore, the check valve can be prevented from being damaged or broken fatally by the dirt; the loss of pressure inside pipes is less and the pressure resistance flow is small, therefore, a protecting role can be played on the water pump, the environmental protection and energy conservation purposes are achieved, the service life of the water pump can be prolonged, and the maintenance cost can be reduced.

Description

A kind of ball type safety check

Technical field

The utility model relates to safety check, particularly a kind of ball type safety check.

Background technique

Conventional formula safety check generally all adopts plane sealing, and sealability is relatively poor relatively.When using, because the dirt of flue the inside is being bonded at it on sealing plane of safety check the phenomenon that causes safety check to leak easily easily under the effect of pressure at steam generator.Simultaneously, conventional safety check under this high pressure conditions, causes sealability to lose efficacy thereby caulking gum can wear out even produce permanent deformation very soon owing to will directly bear High Temperature High Pressure for a long time.The problem that check valve seal performance at this structure is poor, working life is short, a lot of users tend to adopt simultaneously two safety check to do double seal, have so both strengthened the loss of water pump, have increased cost again.

Summary of the invention

The purpose of this utility model is the problem and shortage at above-mentioned existence, the sealability and the working life of provide the impact of a kind of effective minimizing steel ball to sealing rubber pad, improving sealing rubber pad, the ball type safety check of reduction water pump loss.

The technical solution of the utility model is achieved in that a kind of ball type safety check, comprise valve seat and valve body, spring seat is housed in the valve body, spring seat is fixed in the valve body by jump ring, Returnning spring and steel ball are housed in the spring seat, sealing rubber pad is housed in the valve seat, be provided with a banking stop between steel ball and the sealing rubber pad, the diameter that banking stop is provided with mesopore and mesopore is bigger slightly than the median pore diameter of sealing rubber pad, the diameter of banking stop mesopore is littler than the diameter of steel ball, and the outer surface of steel ball contacts with bore edges cascade in banking stop mesopore and the sealing rubber pad.The edge of the light means of press seals rubber pad mesopore of steel ball meeting is sealed and matched itself and sealing rubber pad, and most of surge pressure that steel ball is subjected to can be pressed on the banking stop, makes sealing rubber pad significantly reduce pressure.

Wherein, above-mentioned banking stop is the stainless steel annulus, and the thickness range value of banking stop can be 0.5mm-3mm.

The utility model safety check has then adopted the spacing design of sealing, the sealing steel ball is limited in the fixing scope, only can impose on certain pressure rather than directly bear high pressure sealing rubber pad, make sealing rubber pad can not produce distortion and aging, improve and reduce maintenance and maintenance working life because of the effect that is subjected to High Temperature High Pressure for a long time.Overcome the shortcoming that conventional formula safety check exists, only need system in safety check of installation just can, for the user has reduced cost.Adopt the linear sealing of better tightness; when water-aspirator pressure is impacted safety check; thereby can make the steel ball rotation that inner dirt is taken out of; safety check sealability in use for some time still can keep good; the dirt that produces in the flue can not cause fatal damage or destruction to safety check in the ordinary course of things; the pressure loss is few in the pipeline like this; the pressure choked flow is little; water pump is shielded; not only environmental protection and energy saving; the more important thing is the working life that can also prolong water pump, reduced the expense of maintenance.

Below in conjunction with accompanying drawing the utility model is further described.

Description of drawings

Fig. 1 is the sectional structure schematic representation of the utility model ball type safety check.

Embodiment

As shown in Figure 1, the utility model is a kind of ball type safety check, comprise valve seat 1 and valve body 2, spring seat 4 is housed in the valve body 2, spring seat 4 is fixed in the valve body 2 by jump ring 7, Returnning spring 5 and steel ball 6 are housed in the spring seat 4, sealing rubber pad 3 is housed in the valve seat 1, be provided with a banking stop 8 between steel ball 6 and the sealing rubber pad 3, the diameter that banking stop 8 is provided with mesopore and mesopore is bigger slightly than the median pore diameter of sealing rubber pad 3, the diameter of banking stop 8 mesopores is littler than the diameter of steel ball 6, and the outer surface of steel ball 6 contacts with bore edges cascade in banking stop 8 mesopores and the sealing rubber pad 3.

Banking stop 8 is the stainless steel annulus, and the thickness range value of banking stop 8 is 0.5mm-3mm.For small-sized steam generator, the one-tenth-value thickness 1/10 of banking stop 8 is 0.8mm or 1mm.Thickness is determined on a case-by-case basis.

Illustrate with small-sized steam generator.When steam generator flue pressure is 4kg, if the Flow diameter with general its water intake direction of conventional safety check is 15mm, and the maximum sealing surface diameter of flue is 20mm, the output lift of water pump must be not less than 71m like this, if select the water pump of lift 80m for use, its operating limit reaches 90% (can only can use safely reluctantly) so; When flue pressure is 4.5kg, the output lift of water pump must be not less than 80m, if select the water pump of 80m lift equally for use, that has just exceeded the pressure of the limit of water pump fully, if water pump just is easy to damage, greatly reduce the working life of water pump under the state of this overburdening.A lot of producers may often complain that water pump is defective in quality, but existing true really not so, are actually because manufacturer causes due to its overburdening uses selecting for use of safety check is improper.The utility model safety check, the Flow diameter of water intake direction is 8mm, and the maximum sealing surface diameter of flue is 10mm, and when steam generator flue pressure was similarly 4kg, pump head only need reach 62.5m with regard to passable (if selecting for use its utilization ratio of water pump of 80m lift only to reach 78%); When if flue pressure is 4.5kg, pump head is 70m (water pump of selecting the 80m lift for use equally can in the safe handling lit range), the working life that can also prolong water pump is the more important thing is in so not only environmental protection and energy saving, thereby has reduced the expense of maintenance.

The foregoing description is the utility model preferred implementation; but mode of execution of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.

Claims

1. ball type safety check, comprise valve seat (1) and valve body (2), spring seat (4) is housed in the described valve body (2), spring seat (4) is fixed in the valve body (2) by jump ring (7), Returnning spring (5) and steel ball (6) are housed in the spring seat (4), sealing rubber pad (3) is housed in the valve seat (1), it is characterized in that: be provided with a banking stop (8) between described steel ball (6) and the sealing rubber pad (3), the diameter that described banking stop (8) is provided with mesopore and mesopore is bigger slightly than the median pore diameter of sealing rubber pad (3), the diameter of banking stop (8) mesopore is littler than the diameter of steel ball (6), and the outer surface of steel ball (6) contacts with bore edges cascade in banking stop (8) mesopore and the sealing rubber pad (3).

2. ball type safety check according to claim 1 is characterized in that: described banking stop (8) is the stainless steel annulus, and the thickness range value of banking stop (8) is 0.5mm-3mm.