CN205534414U - Novel check valve - Google Patents

Abstract

The utility model relates to a new type of check valve, which comprises a valve body. Both sides of the valve body are coaxially integrated with connecting flanges. One side of the valve body is the liquid outlet side, the other side is the liquid inlet side, and the valve seat is coaxial. One body is built on the inner wall of the valve body, and a valve plate is arranged in the body cavity of the valve body where the valve seat is located on the liquid outlet side. In the guide hole, a guide sleeve is coaxially embedded in the guide hole, and a spring is coaxially mounted on the guide sleeve. The length of the spring is greater than the length of the guide sleeve, and the elastic end of the spring corresponds to the side of the valve plate. The new check valve provided by this application adopts a new spring compression structure, and the spring is installed on the valve body. Compared with the traditional installation on the valve plate, it has the advantages of easy installation and replacement.

Description

A new check valve

technical field

The utility model belongs to the field of valves and is a novel check valve.

Background technique

Check valve refers to the valve that relies on the flow of the medium itself to automatically open and close the disc to prevent the backflow of the medium, also known as check valve, one-way valve, reverse flow valve, and back pressure valve. The check valve is a kind of automatic valve, its main function is to prevent the reverse flow of the medium, the reverse rotation of the pump and the drive motor, and the discharge of the container medium.

The disc of the swing check valve rotates around the shaft. Its fluid resistance is generally smaller than that of the lift check valve, and it is suitable for occasions with larger diameters. According to the number of discs, swing check valves can be divided into three types: single disc swing type, double disc swing type and multi disc swing type. Single disc swing check valves are generally suitable for medium-caliber occasions. When a single disc swing check valve is selected for a large-diameter pipeline, in order to reduce the water hammer pressure, it is best to use a slow-closing check valve that can reduce the water hammer pressure. Double disc swing check valve is suitable for large and medium diameter pipelines. The double-disc swing check valve has a small structure and light weight, and is a rapidly developing check valve; the multi-disc swing check valve is suitable for large-diameter pipelines.

Through searching, it is found that the following patent documents are more relevant to this application, and the specific contents are as follows:

CN202040382U discloses a wafer swing check valve, comprising a valve body, a valve core, a T-shaped connecting rod, a locator, a connecting rod, and a hinged shaft. The rod is connected with one end of the connecting rod, the other end of the connecting rod is arranged on the locator through the hinge shaft, and the locator is arranged in the opening groove of the valve body.

CN202215799U discloses a swing check valve, the valve seat is located in the valve body, a valve disc is arranged on the side where the valve seat is located in the body cavity of the valve body, the valve disc is connected with a rocker, and the rocker is connected to the valve body through a pin superior.

The present application has made great improvements on the basis of the above-mentioned patents and obtained good results.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide an improved bonnet screw-connected flange gate valve with low cost, good sealing performance and convenient installation.

The technical scheme that the utility model realizes purpose is as follows:

A new type of check valve, including a valve body, the two sides of the valve body are coaxially integrated with connecting flanges, one side of the valve body is the liquid outlet side, and the other side is the liquid inlet side, and the valve seat is coaxially integrated into the valve body. The inner wall of the valve body is provided with a valve plate in the valve body cavity where the valve seat is located on the liquid outlet side. The valve plate is hinged on the inner wall of the valve body through a pin shaft. A guide sleeve is coaxially embedded in the hole, and a spring is coaxially mounted on the guide sleeve. The length of the spring is greater than that of the guide sleeve, and the elastic end of the spring corresponds to the side of the valve plate.

Furthermore, a sealing ring is embedded on the sealing surface of the valve seat.

The beneficial effects of the utility model are:

1. The new check valve provided by this application adopts a new type of spring compression structure, and the spring is installed on the valve body. Compared with the traditional installation on the valve plate, it has the advantages of easy installation and replacement.

2. The new type of check valve provided by this application is suitable for pipes of different sizes. It is quick to install and disassemble, and has the characteristics of simple structure and novel design.

Description of drawings

Fig. 1 is a structural schematic diagram of the present application.

detailed description

The utility model will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present utility model in turn.

A new type of check valve, including a valve body 2, the two sides of the valve body are coaxial with a connecting flange 1, one side of the valve body is the liquid outlet side, the other side is the liquid inlet side 9, and the valve seat 8 is coaxial One body is built on the inner wall of the valve, and a valve plate 6 is arranged in the body cavity of the valve body where the valve seat is located on the liquid outlet side, and the valve plate is hinged on the inner wall of the valve through the pin shaft 5. The innovation of this application lies in:

An axial guide hole 3 is formed on the side wall of the liquid outlet side of the valve body, and a guide sleeve 10 is coaxially embedded in the guide hole, and a spring 4 is coaxially placed on the guide sleeve. The end corresponds to the side of the valve plate. When the valve plate is turned up, the spring exerts a certain pressure on the valve plate. When the fluid passes through, the spring presses the valve plate against the valve seat to prevent the fluid from flowing back and play the role of check.

In this application, in order to increase the sealing performance between the valve plate and the valve seat, a sealing ring 7 is embedded on the sealing surface of the valve seat.

Claims (2)

1. a non-return valve, including valve body, valve body both sides are the most integrally shaped with adpting flange, valve body Side is liquid outlet side, and opposite side is liquid-inlet side, and the coaxial system of valve seat is at valve interior wall, at valve seat The valve body body cavity being positioned at liquid outlet side is provided with valve plate, and valve plate is contained on valve interior wall by bearing pin hinge, and it is special Levy and be: on the sidewall of valve body liquid outlet side, be shaped with an axial guide hole, coaxial setting-in one guide pin bushing in guide hole, At guide pin bushing coaxial package spring, the length of spring is more than the length of guide pin bushing, the elastic ends correspondence valve of described spring The side of plate.

Non-return valve the most according to claim 1, it is characterised in that: embedding on the sealing surface of valve seat Dress sealing ring.