CN201636395U

CN201636395U - Straight-through check valve

Info

Publication number: CN201636395U
Application number: CN2010201701063U
Authority: CN
Inventors: 王忠芳
Original assignee: WENZHOU PETROCHEMICAL MECHANICAL VALVE FACTORY
Current assignee: WENZHOU PETROCHEMICAL MECHANICAL VALVE FACTORY
Priority date: 2010-04-26
Filing date: 2010-04-26
Publication date: 2010-11-17
Anticipated expiration: 2020-04-26

Abstract

The utility model relates to a straight-through check valve. Flanges are arranged at an inlet and an outlet of a valve body; the valve body is provided with a valve clack hole along the vertical direction; a valve clack is mounted in the valve clack hole in a clearance fit manner; a spring component is mounted between the upper end of the valve clack and the valve body; a contact surface of the valve clack hole and the valve clack is cone-shaped; and a cone-shaped sealing gasket matched with the taper of the valve clack hole is arranged at the lower end of the valve clack. An annular groove is formed on the conical surface of the valve clack hole; an annular sealing ring is mounted in the groove, and the height thereof is not less than the depth of the annular groove. The utility model can effectively increase the contact area between the check valve and the valve clack through setting the upper end surface of the valve clack hole into a conical structure, thereby further enhancing the sealing performance. A sealing ring is additionally arranged on the conical surface of the valve clack hole, so that the valve clack hole is more tightly jointed with the valve clack, thereby ensuring better sealing effect and prolonging the service life of the valve.

Description

Through-conduit check valve

Technical field

The utility model belongs to valve technology field, relates in particular to the Through-conduit check valve that a kind of flap slides along the valve body vertical center line.

Background technique

Safety check claims check valve, one-way valve again, is used for pipe-line system, and it relies on the mobile power that produces of pipeline medium to open and close automatically, and can be used for preventing that medium from flowing backwards in pipeline, belongs to automatic valve.According to the difference of project organization, can be divided into Lift check valve, Swing check valve and butterfly check valve.Wherein, Lift check valve can be divided into vertical and horizontal two kinds.Horizontal Lift check valve at work, its flap slides along the valve body vertical center line, is installed on the horizontal pipe and uses.Flap is the flap of ball or other shapes of cooperating with flap hole sealing surface in the valve body.When the medium postive direction when import flows into valve body, medium thrust promotes flap and overcomes the gravity of spring force and flap along rising on the flap hole, the flap sealing surface breaks away from flap hole sealing surface and opens, medium flows to Way out from the valve inlet direction, when medium stops mobile or reverse flow, flap relies on deadweight and spring force to act on the flap hole, and passes through both sealing surface prevention medium reverse flows.

By as seen above-mentioned, sealing quality between flap and the flap hole will greatly influence the sealability of safety check, the patent No. is 200720190927.1, denomination of invention is the utility model patent of " safety check ", its flap be provided with by the lower end that sealing gasket is realized and the flap hole between sealing, in conjunction with its specification and accompanying drawing as can be seen, the upper-end surface in its flap hole is the plane, the sealing gasket of its flap fits in the upper-end surface in flap hole by flap deadweight and spring force, the defective of this structure is because upper-end surface, flap hole is the plane, the area of contact of itself and flap sealing gasket is less, in long-term using process, along with constantly wearing out of flap sealing gasket, problems such as poorly sealed must occur, and then finally cause safety check to lose efficacy.

The model utility content

The utility model purpose is to prolong the working life of safety check by improving the sealing between flap hole and the flap, reduces entreprise cost.

For achieving the above object, the technological scheme that the utility model adopted is: a kind of Through-conduit check valve, valve body import and outlet are provided with flange, valve body offers the flap hole along the vertical line direction, flap is installed in the flap hole movingly, be equiped with spring assembly between flap upper end and the valve body, the surface of contact of described flap hole and flap is tapered, and described flap lower end is equiped with the cone seal rubber cushion that matches with flap hole tapering.

Further, the conical surface in described flap hole offers annular groove, is equiped with O-ring seal in the described annular groove, and the height of described O-ring seal is not less than the degree of depth of described annular groove.

The beneficial effects of the utility model are:

1,, can effectively increase the area of contact between itself and the flap, and then strengthen sealability by cone structure is arranged in upper-end surface, flap hole.

2, set up seal ring at the conical surface in flap hole, make its with flap between contact and fit more closely, good sealing effect can effectively prolong working life of valve.

Description of drawings

For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment of the utility model also in conjunction with the accompanying drawings, the utility model is described in further detail, wherein below

Fig. 1 is the structural representation of Through-conduit check valve described in the utility model.

Embodiment

As shown in Figure 1, a kind of Through-conduit check valve, valve body 1 import and outlet are provided with flange 2, valve body 1 offers flap hole 3 along the vertical line direction, flap 4 is installed in the flap hole 3 movingly, be equiped with spring assembly 5 between flap 4 upper ends and the valve body 1, described flap hole 3 is tapered with the surface of contact of flap 4, and described flap 4 lower ends are equiped with the cone seal rubber cushion 6 that matches with flap hole 3 taperings.

Further, the conical surface in described flap hole 3 offers annular groove, is equiped with O-ring seal 7 in the described annular groove, and the height of described O-ring seal 7 is not less than the degree of depth of described annular groove.

Obviously, the foregoing description only is for example clearly is described, and is not the qualification to mode of execution.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all mode of executions.And conspicuous variation of being extended out thus or change still are among the protection domain of the utility model creation.

Claims

1. Through-conduit check valve, valve body (1) import and outlet are provided with flange (2), valve body (1) offers flap hole (3) along the vertical line direction, flap (4) is installed in the flap hole (3) movingly, be equiped with spring assembly (5) between flap (4) upper end and the valve body (1), it is characterized in that: described flap hole (3) is tapered with the surface of contact of flap (4), and described flap (4) lower end is equiped with the cone seal rubber cushion (6) that matches with flap hole (3) tapering.

2. Through-conduit check valve as claimed in claim 1, it is characterized in that: the conical surface in described flap hole (3) offers annular groove, be equiped with O-ring seal (7) in the described annular groove, the height of described O-ring seal (7) is not less than the degree of depth of described annular groove.