CN205244505U

CN205244505U - Check valve

Info

Publication number: CN205244505U
Application number: CN201520977427.7U
Authority: CN
Inventors: 马茹栓
Original assignee: TIANJIN BINHAI AOJIE VALVE Co Ltd
Current assignee: TIANJIN BINHAI AOJIE VALVE Co Ltd
Priority date: 2015-11-30
Filing date: 2015-11-30
Publication date: 2016-05-18
Anticipated expiration: 2025-11-30

Abstract

The utility model relates to a check valve, include: valve body and valve gap, a valve body upper portion system has adapter sleeve, and adapter sleeve inner edge system is threaded, in the coaxial thread engagement in valve gap lower part is embedded into the adapter sleeve of valve body be provided with fluid inlet passageway and fluid exit channel in the valve body one side of the inside fluid inlet passageway of valve body is provided with annular valve base, the disk seat inner edge be with the intake channel each other the intercommunication the fluid through mouthful, have a radial protruding ring in valve body adapter sleeve's lower extreme next -door neighbour's a valve body inner wall system, the inside arch of this radial protruding ring is above adapter sleeve's internal diameter. The utility model provides an over -and -under type check valve has a radial bulge loop in the root system of the inner edge of valve body and valve cover connection pipe, and the bulge loop can stop the meshing screw department of the connecting pipe of reflux liquid entering valve gap and valve body, prevents that connecting pipe inside from being corroded, avoids connecting pipe inner wall micro -deformation to lead to the fact and seals up sternly or the liquid leakage.

Description

Check-valves

Technical field

The utility model belongs to valve field, especially a kind of lift check valve.

Background technology

Lift check valve refers to and relies on medium itself to flow and automatic open and close flap, is used for preventing the valve that medium flows backwards, and claims again non-return valve, check valve, reflux valve and counterbalance valve. Check-valves belongs to a kind of automatic valve, and its Main Function is to prevent that medium from flowing backwards, preventing the reversion of pump and drive motor, and the releasing of vessel media. Check-valves also can be used for to pressure wherein may rise to exceed system press accessory system provide on the pipeline of supply. Check-valves mainly can be divided into swing check valve (according to center of gravity rotation) and lift check valve (moving along axis).

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art part, a kind of novel structure is provided, reduces the lift check valve of withdrawing fluid pressure.

The utility model is that technical solution problem adopts following technical scheme:

A kind of lift check valve, comprise: valve body and valve gap, valve body upper part integrated is shaped with joint sleeve, joint sleeve inner edge is shaped with screw thread, the engagement of bonnet lower coaxial threaded is embedded in the joint sleeve of valve body, in described valve body, be provided with fluid inlet passage and fluid issuing passage, a side at described valve inner fluid inlet passage is provided with ring-shaped valve seats, valve seat inner edge is that the fluid being interconnected with intake channel passes through mouth, coaxially mount cover flap in described valve seat upper surface, the coaxial one of flap upper surface is shaped with valve rod, slide coaxially to slide to wear and turn in the chute being coaxially shaped with in valve gap inner side in the upper end of described valve rod, between described valve stem tip face and chute inner face, be coaxially arranged with spring, it is characterized in that: the valve interior wall one the lower end of valve body joint sleeve next-door neighbour is shaped with a radial protrusion ring, this radial protrusion hoop internal projection exceedes the internal diameter of joint sleeve.

Good effect of the present utility model is as follows:

The check-valves that the utility model provides is shaped with a radial convex loop at the root of the inner edge of valve body and valve gap tube connector, this bulge loop can stop that the liquid of backflow enters the thread engagement place of the tube connector of valve gap and valve body, prevent that tube connector inside is corroded, avoid the micro-deformation of tube connector inwall to cause poorly sealed or leak of liquid.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Detailed description of the invention

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 check-valves, its structure as shown in Figure 1, comprise valve body 10 and valve gap 1, valve body upper part integrated is shaped with joint sleeve 5, joint sleeve inner edge is shaped with screw thread, the engagement of bonnet lower coaxial threaded is embedded in the joint sleeve of valve body, in described valve body, be provided with fluid inlet passage 8 and fluid issuing passage 11, a side at described valve inner fluid inlet passage is provided with ring-shaped valve seats 7, valve seat inner edge is that the fluid being interconnected with intake channel passes through mouth, coaxially mount cover flap 9 in described valve seat upper surface, the coaxial one of flap upper surface is shaped with valve rod 4, slide coaxially to slide to wear and turn in the chute 3 being coaxially shaped with in valve gap inner side in the upper end of described valve rod, between described valve stem tip face and chute inner face, be coaxially arranged with spring 2, on valve rod, move, extrusion spring. for easy for installation, on the top of described valve gap, one is shaped with rotating nut.

This uses novel innovation to be:

Valve interior wall one the lower end of valve body joint sleeve next-door neighbour is shaped with a radial protrusion ring 6, this radial protrusion hoop internal projection exceedes the internal diameter of joint sleeve, when valve gap be connected joint sleeve connect engagement after, protruding ring forms and blocks junction, effectively places the liquid double thread place refluxing and corrodes or corrosion.

The course of work of this lift check valve is as follows:

When above-mentioned lift check valve is arranged on and plays check function on pipeline, liquid medium is by fluid inlet passage, fluid is pushed flap open by mouth and is then entered exit passageway, in the process of passing through at fluid, flap is boosted, flap promotes valve rod upward sliding in chute, the upper end Compress Spring of valve rod, when the flow of liquid medium is constant, spring keeps compressive state, flap is opened, in the time not having liquid medium process or liquid medium to reflux, spring automatically opens promotion valve rod and moves downward until flap is closed, when normally using, above-mentioned lift check valve can play well check function.

Claims

1. a check-valves, comprise valve body and valve gap, valve body upper part integrated is shaped with joint sleeve, joint sleeve inner edge is shaped with screw thread, the engagement of bonnet lower coaxial threaded is embedded in the joint sleeve of valve body, in described valve body, be provided with fluid inlet passage and fluid issuing passage, a side at described valve inner fluid inlet passage is provided with ring-shaped valve seats, valve seat inner edge is that the fluid being interconnected with intake channel passes through mouth, coaxially mount cover flap in described valve seat upper surface, the coaxial one of flap upper surface is shaped with valve rod, slide coaxially to slide to wear and turn in the chute being coaxially shaped with in valve gap inner side in the upper end of described valve rod, between described valve stem tip face and chute inner face, be coaxially arranged with spring, it is characterized in that: the valve interior wall one the lower end of valve body joint sleeve next-door neighbour is shaped with a radial protrusion ring, this radial protrusion hoop internal projection exceedes the internal diameter of joint sleeve.

2. check-valves according to claim 1, is characterized in that: on the top of described valve gap, one is shaped with rotating nut.