CN210920229U

CN210920229U - Light swing check valve

Info

Publication number: CN210920229U
Application number: CN201921850599.2U
Authority: CN
Inventors: 朱建明
Original assignee: Kunshan Viza Valve Co ltd
Current assignee: Kunshan Viza Valve Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-07-03
Anticipated expiration: 2029-10-31

Abstract

The utility model discloses a light swing check valve in the technical field of check valves, aiming at solving the technical problems that the stop-return valve in the prior art is complex in structure and not easy to maintain, the valve clack is easy to block, the sealing effect is poor and the leakage is easy, comprising a valve body and a valve clack, wherein a valve seat and a shaft lug groove are arranged in the valve body, and a valve cover is arranged at the upper part of the valve body; the valve flap is provided with a neck part, two sides of the neck part are provided with shaft lugs, the shaft lugs are arranged in shaft lug grooves, the back surface of the neck part is attached to the lower surface of the valve cover, the valve flap is matched with the valve seat to form sealing, the center of the valve flap is provided with a bulge which enables the gravity center of the valve flap to deviate towards the direction of the valve seat, the gravity center of the valve flap deviates towards the direction of the valve seat, and meanwhile, an O-shaped ring is arranged on a sealing surface to improve the sealing performance; the axle lug is limited in the axle lug groove through the matching of the valve clack neck and the valve cover, the whole check valve is simple in structure, and the production and maintenance of accessories and easily-damaged parts are less convenient.

Description

Light swing check valve

Technical Field

The utility model belongs to the technical field of the check valve, concretely relates to light-duty swing check valve.

Background

The check valve is widely applied to industries such as power stations, petroleum, chemical industry, pharmacy, food and the like. Can be directly matched with import equipment for use. The function of the swing check valve is to prevent the medium in the pipeline from flowing backwards. The check valve belongs to the automatic valve class, and the opening and closing piece relies on the power of flowing medium to open or close by oneself. The check valve is only used on a pipeline with unidirectional medium flow, prevents medium from flowing back, and protects the integrity of upstream equipment to prevent accidents.

However, the valve body middle cavity of the swing check valve in the traditional design is round and heavy, the number of internal parts is large, the machining is difficult, the precision requirement is high, the valve flap is easy to block and has large leakage points, the sealing effect of the valve flap is poor, the number of parts to be repaired and replaced on line is large, the repair or production period is long, the labor cost is very high, and the application range is greatly limited. The traditional check valve is high and large, and the installation space of the pipeline is limited.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a light-duty swing check valve to solve prior art and suspend the complicated difficult maintenance of valve structure, the valve clack blocks easily, and the poor technical problem who easily leaks of sealed effect.

In order to achieve the above purpose, the utility model adopts the technical proposal that: a light swing check valve comprises a valve body and a valve clack, wherein a valve seat and a shaft lug groove are arranged in the valve body, and a valve cover is arranged at the upper part of the valve body; the valve clack has the neck, the neck both sides are equipped with the journal ear, the journal ear is arranged in the journal ear inslot, the back of neck with the lower surface laminating of valve gap, the valve clack with the valve seat cooperation forms sealedly, the valve clack center has the arch that makes the valve clack focus to the skew of valve seat direction.

And the shaft lug is provided with a bushing.

The back of the neck is arc-shaped.

A dovetail groove is formed in the sealing surface of the valve clack, and a first O-shaped ring is arranged in the dovetail groove.

And a second O-shaped ring is arranged between the valve cover and the valve body, and the valve cover is connected with the valve body through a bolt.

The sealing surface formed by the valve clack and the valve seat is 90 degrees with the axis of the channel of the valve body.

Compared with the prior art, the utility model discloses the beneficial effect who reaches: the light swing check valve of the utility model improves the sealing performance of the check valve by shifting the gravity center of the valve clack to the direction of the valve seat and arranging the O-shaped ring on the sealing surface; the axle lug is limited in the axle lug groove through the matching of the valve clack neck and the valve cover, the whole check valve is simple in structure, and the production and maintenance of accessories and easily-damaged parts are less convenient.

Drawings

Fig. 1 is a schematic longitudinal sectional view of a light swing check valve according to an embodiment of the present invention in a closed state;

fig. 2 is a partially enlarged schematic view of a boss and a bushing of a light swing check valve according to an embodiment of the present invention;

fig. 3 is a schematic longitudinal sectional view of a light swing check valve according to an embodiment of the present invention in an open state;

fig. 4 is a schematic perspective view of a light swing check valve according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a valve flap of a light swing check valve according to an embodiment of the present invention;

in the figure: 1. a valve body; 2. a valve seat; 3. a valve flap; 4. a valve cover; 5. a neck portion; 6. a shaft lug; 7. a bushing; 8. a shaft lug groove; 11. a plug screw; 18a, a first O-ring; 18b. a second O-ring.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

It should be noted that, in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc. indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for convenience of description of the present invention but do not require the present invention to be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. As used in the description of the present invention, the terms "front," "back," "left," "right," "up," "down" and "in" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in fig. 1 to 5, the light swing check valve comprises a valve body 1 and a valve clack 3, wherein a valve seat 2 and a lug groove 8 are arranged in the valve body 1, the valve seat 2 and the valve body 1 are welded together, and a sealing surface of the valve seat 2 is vertical to an axis of a channel of the valve body 1; valve clack 3 forms seal structure with the cooperation of disk seat 2, the sealed face that valve clack 3 and disk seat 2 formed is 90 with the axis of the passageway of valve body 1, be equipped with the dovetail on the sealed face of valve clack 3, set up first O type circle 18a in the dovetail, valve clack 3 center has the arch that makes the focus of valve clack 3 to disk seat 2's direction skew, through the focus with valve clack 3 to disk seat 2's direction skew, set up O type circle simultaneously on sealed face and improve the sealing performance of check valve, it can seal to make valve clack 3 under the non-pressure condition simultaneously, prevent that the medium from flowing back. The valve clack 3 is provided with a neck part 5, two sides of the neck part 5 are provided with shaft lugs 6, the shaft lugs 6 are arranged in shaft lug grooves 8, the horizontal positions of the shaft lugs 6 in the shaft lug grooves 8 are adjusted by the shaft lugs 6 through a bushing 7 arranged on the shaft lugs 6, and the sealing effect of the valve clack 3 and the valve seat 2 is guaranteed. The valve cover 4 is installed on the upper portion of the valve body 1 through the nut 9 and the stud 10, and a second O-shaped ring 18b is arranged between the valve cover 4 and the valve body 1, so that the sealing effect of the valve cover 4 is guaranteed. The back of neck 5 is the arc, and in the switching process of valve clack 3, the back of neck 5 and the lower surface of valve gap 4 are laminated all the time, prevent that valve clack 3 is blown out by fluid pressure in the switching process. Be equipped with the preformed hole on valve gap 4, the preformed hole is sealed with plug screw 11, can be used for installing additional instrumentation such as manometer, thermometer when using, also can be used for check-up clearance of check valve.

The utility model provides a pair of light-duty swing check valve, valve clack have protruding cambered surface, and the focus makes it draw close to the disk seat in disk seat one side, when guaranteeing the pipeline backward flow, can form sealedly under low pressure or the non-pressure. The valve has the characteristics of simple mounting structure, difficult blockage, convenient production and maintenance, good sealing performance and the like.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims

1. A light swing check valve is characterized by comprising a valve body and a valve clack, wherein a valve seat and a shaft lug groove are arranged in the valve body, and a valve cover is arranged at the upper part of the valve body; the valve clack has the neck, the neck both sides are equipped with the journal ear, the journal ear is arranged in the journal ear inslot, the back of neck with the lower surface laminating of valve gap, the valve clack with the valve seat cooperation forms sealedly, the valve clack center has the arch that makes the valve clack focus to the skew of valve seat direction.

2. The light-duty swing check valve of claim 1 wherein the boss is provided with a bushing.

3. The light-weight swing check valve of claim 1 wherein the back of the neck is curved.

4. The light-duty swing check valve of claim 1, wherein a dovetail groove is provided on a sealing surface of the valve flap, and a first O-ring is provided in the dovetail groove.

5. The light-duty swing check valve of claim 1 wherein a second O-ring is disposed between the valve cover and the valve body, the valve cover being bolted to the valve body.

6. The light-duty swing check valve of claim 1 wherein the sealing surface formed by the flap and the valve seat is at 90 ° to the axis of the passageway of the valve body.