CN203627820U

CN203627820U - Valve seat with multiple sealing structures

Info

Publication number: CN203627820U
Application number: CN201320729837.0U
Authority: CN
Inventors: 张国营; 乔金全; 李长远; 由玉红; 张宇; 高来军
Original assignee: TIANJIN AOTESI VALVE MANUFACTURING Co Ltd
Current assignee: TIANJIN AOTESI VALVE MANUFACTURING Co Ltd
Priority date: 2013-11-15
Filing date: 2013-11-15
Publication date: 2014-06-04
Anticipated expiration: 2023-11-15

Abstract

The utility model relates to a valve seat with multiple sealing structures. The valve seat comprises a valve seat body, an outer edge and valve rod sealing rings. The valve seat body is coaxially and fixedly installed in a medium channel of a valve body, a valve plate is installed in the middle of the valve seat in the radial direction in a rotary mode, the two valve rod sealing rings are coaxially and symmetrically arranged at the positions, where a valve rod makes contact with the valve seat, of the two ends of the valve seat respectively, the valve plate is in seal fit with the valve seat, and a contact convex ring with the cross section of a multi-layer step-shaped structure which is convex inwards is arranged in the middle of the valve seat in the radial direction. The multi-layer gradual contacting type design is adopted in the valve seat, so that the valve plate gradually makes contact with the valve seat in the closing process, the good sealing performance is guaranteed, meanwhile unnecessary torque is reduced, and therefore the service life of the valve seat is prolonged.

Description

A kind of valve seat that is shaped with multi-sealing structure

Technical field

The utility model belongs to valve field, especially a kind of valve seat that is shaped with multi-sealing structure.

Background technique

In order to guarantee fitting tight, between valve plate and valve seat, be interference fit, but valve seat and valve plate produce friction in closing course, cause compared with high pulling torque, and use for a long time that valve seat is easily out of shape, perk even damages.

Model utility content

The purpose of this utility model is to overcome the deficiencies in the prior art part, and a kind of simple in structure, reasonable in design, valve seat that is shaped with multi-sealing structure of reducing moment of torsion, good airproof performance is provided.

The utility model solves its technical problem and takes following technological scheme to realize:

A kind of valve seat that is shaped with multi-sealing structure, comprise valve seat body, outer, valve stem seal ring, valve seat body is coaxially packed in the medium channel of valve body, valve seat is radially rotatablely equipped with a valve plate in middle part, the equal coaxial-symmetrical in valve seat two ends of the contact position of valve rod and valve seat is shaped with a valve stem seal ring, this valve plate coordinates with valve base sealing, it is characterized in that: described valve seat middle part is radially shaped with the contact bulge loop that cross section is the ladder-type structure of double-deck convex.

And the axial two ends of described valve seat are shaped with the outer of an evagination annular, this outer is coaxially inlaid in the made end face groove in valve body two ends.

And described outer is all shaped with a position limiting convex ring, this position limiting convex ring is inlaid in limited ring groove made in valve body end face groove.

Advantage of the present utility model and good effect are:

1, this valve seat is shaped with multi-level progressive contact-type seat design, makes valve plate in the process of closing, contact gradually valve seat, in guaranteeing good seal performance, reduces unnecessary moment of torsion, thereby extends the working life of valve seat.

2, of the present utility model simple in structure, reasonable in design, sturdy and durable, structural strength is high, moment of torsion is little, good airproof performance, poppet whole service life.

Accompanying drawing explanation

Fig. 1 is structural front view of the present utility model;

Fig. 2 be Fig. 1 in cut open a left side and look schematic diagram;

Fig. 3 is valve seat construction enlarged view;

Fig. 4 be in Fig. 3 A-A to sectional structure chart.

Embodiment

Below in conjunction with accompanying drawing and by specific embodiment, the utility model is described in further detail, and following examples are descriptive, are not determinate, can not limit protection domain of the present utility model with this.

A kind of valve seat that is shaped with multi-sealing structure, comprise valve seat body 2, outer 6, valve stem seal ring 4, valve seat body is coaxially packed in the medium channel of valve body 1, valve seat is radially rotatablely equipped with a valve plate 3 in middle part, the equal coaxial-symmetrical in valve seat two ends of the contact position of valve rod and valve seat is shaped with a valve stem seal ring, prevent the leakage of valve rod link position, this valve plate coordinates with valve base sealing, and innovative point of the present utility model is:

Described valve seat middle part is radially shaped with the stepped shaft contact bulge loop 5 of multilayer convex, and this enforcement accompanying drawing is depicted as the contact bulge loop of Double-ladder, in valve plate closing course, carries out gradual contact with valve seat, and progressively press seal, avoids too much magnitude of interference.

The axial two ends of valve seat are shaped with the outer of an evagination annular, and this outer is coaxially inlaid in the made end face groove in valve body two ends, prevents that valve seat from moving axially in medium channel.

For the installation stability of strengthening valve seat prevents from being out of shape perk, described outer is all shaped with a position limiting convex ring 7, and this position limiting convex ring is inlaid in limited ring groove made in valve body end face groove.

Although disclose for the purpose of illustration embodiment of the present utility model and accompanying drawing, but it will be appreciated by those skilled in the art that: not departing from the spirit and scope of the utility model and claims, various replacements, variation and modification are all possible, therefore, scope of the present utility model is not limited to embodiment and the disclosed content of accompanying drawing.

Claims

1. one kind is shaped with the valve seat of multi-sealing structure, comprise valve seat body, outer, valve stem seal ring, valve seat body is coaxially packed in the medium channel of valve body, valve seat is radially rotatablely equipped with a valve plate in middle part, the equal coaxial-symmetrical in valve seat two ends of the contact position of valve rod and valve seat is shaped with a valve stem seal ring, this valve plate coordinates with valve base sealing, it is characterized in that: described valve seat middle part is radially shaped with the contact bulge loop that cross section is the ladder-type structure of double-deck convex.

2. the valve seat that is shaped with multi-sealing structure according to claim 1, is characterized in that: the axial two ends of described valve seat are shaped with the outer of an evagination annular, and this outer is coaxially inlaid in the made end face groove in valve body two ends.

3. the valve seat that is shaped with multi-sealing structure according to claim 2, is characterized in that: described outer is all shaped with a position limiting convex ring, and this position limiting convex ring is inlaid in limited ring groove made in valve body end face groove.