CN203348641U

CN203348641U - Check valve

Info

Publication number: CN203348641U
Application number: CN 201320422714
Authority: CN
Inventors: 沈永来
Original assignee: ZHENGYU LIGHT INDUSTRIAL MACHINERY Co Ltd
Current assignee: ZHENGYU LIGHT INDUSTRIAL MACHINERY Co Ltd
Priority date: 2013-07-17
Filing date: 2013-07-17
Publication date: 2013-12-18
Anticipated expiration: 2023-07-17

Abstract

The utility model discloses a check valve which comprises a valve cover, a valve body and a valve flap, wherein the valve cover comprises an upper valve cover and a lower valve cover. The upper valve cover and the lower valve cover are connected with the valve body through bolts, the valve rod is arranged on the valve flap, and three positioning rods are arranged at the bottom of the inner wall of the valve body and are in a triangular opposite mode. A triangular plate is fixed at the upper ends of the positioning rods, a cap-shaped positioning device is fixed at the center of the triangular plate, and the triangular plate and the cap-shaped positioning device are provided with through holes for the valve rod to penetrate. A spring is arranged on the valve rod, the upper end of the spring abuts against the bottom end of the triangular plate, and the lower end of the spring is in contact with the valve flap. The check valve can prevent the valve flap from swinging.

Description

Safety check

Technical field

The utility model relates to a kind of safety check.

Background technique

Conventional check valves generally comprises valve body and flap, and in valve body, corresponding flap is provided with valve body, and sealing is all to be socketed spring by the flap valve rod, moment by spring completes the non-return sealing, in long-term the use, skew will occur and produce gap in the flap valve rod, affects sealing effect.

Summary of the invention

In view of the deficiency of background technique, technical problem to be solved in the utility model is to provide a kind of safety check that can prevent that flap from swinging.

For this reason, the detachable safety check that the utility model provides comprises valve gap, valve body and flap, valve gap comprises bonnet and bottom flange, bonnet, bottom flange and valve body are bolted, flap is provided with valve rod, the valve interior wall bottom is provided with three positioning rods, positioning rod is the triangle opposition, the positioning rod upper end is fixed with set square triangle, the set square triangle center is fixed with the shape for hat positioning device, and set square triangle and shape for hat positioning device are provided with and hold the through hole that valve rod passes, and valve rod is provided with spring, end in contact set square triangle bottom on spring, end in contact flap under spring.

In the utility model, the valve interior wall bottom is provided with three triangle opposition positioning rods, the positioning rod upper end is fixed with set square triangle, the set square triangle center is fixed with the shape for hat positioning device, set square triangle and shape for hat positioning device are provided with and hold the through hole that valve rod passes, in the opening-closing process of valve, under the through-hole guides effect of valve rod on set square triangle center and shape for hat positioning device, move, effectively prevented the swing of flap.

The accompanying drawing explanation

The cross-sectional view of the safety check that Fig. 1 provides for the utility model;

Fig. 2 is plan view of the present utility model.

Embodiment

As shown in Figure 1, the safety check that the utility model provides comprises valve gap, valve body 1 and flap 2, valve gap comprises bonnet 3 and bottom flange 4, bonnet 3, bottom flange 4 is bolted with valve body 1, flap 2 is provided with valve rod 5, valve body 1 inwall bottom is provided with three positioning rods 6, positioning rod 6 is the triangle opposition, positioning rod 6 upper ends are fixed with set square triangle 7, set square triangle 7 centers are fixed with shape for hat positioning device 8, shape for hat positioning device 8 is the planar distribution of hemisphere, set square triangle 7 and shape for hat positioning device 8 are provided with and hold the through hole 9 that valve rod 5 passes, valve rod 5 is provided with spring 10, end in contact set square triangle 7 bottoms on

spring

10, 10 times end in contact flaps 2 of spring.

In the present embodiment, the valve interior wall bottom is provided with three triangle opposition positioning rods 6, positioning rod 6 upper ends are fixed with set square triangle 7, set square triangle 7 centers are fixed with shape for hat positioning device 8, set square triangle 7 and shape for hat positioning device 8 are provided with and hold the through hole 9 that valve rod 5 passes, in the opening-closing process of valve, under through hole 9 leading roles of valve rod 5 on set square triangle 7 centers and shape for hat positioning device 8, move, effectively prevented the swing of flap 2.

Claims

1. a safety check, comprise valve gap, valve body and flap, valve gap comprises bonnet and bottom flange, bonnet, bottom flange and valve body are bolted, flap is provided with valve rod, it is characterized in that: described valve interior wall bottom is provided with three positioning rods, positioning rod is the triangle opposition, described positioning rod upper end is fixed with set square triangle, the set square triangle center is fixed with the shape for hat positioning device, and described set square triangle and shape for hat positioning device are provided with and hold the through hole that valve rod passes, and described valve rod is provided with spring, end in contact set square triangle bottom on spring, end in contact flap under spring.

2. safety check according to claim 1, it is characterized in that: described shape for hat positioning device is the planar distribution of hemisphere.