CN201428828Y

CN201428828Y - Ball valve

Info

Publication number: CN201428828Y
Application number: CN200920121156XU
Authority: CN
Inventors: 龚名光; 陈明海
Original assignee: HELI MECHANICAL PUMP CO Ltd NINGBO CITY
Current assignee: HELI MECHANICAL PUMP CO Ltd NINGBO CITY
Priority date: 2009-05-27
Filing date: 2009-05-27
Publication date: 2010-03-24
Anticipated expiration: 2019-05-27

Abstract

The utility model relates to a ball valve which comprises a valve body formed by a valve seat (1) and a valve cover (5) as well as a spherical valve core (2) movably arranged inside the valve body, wherein the valve seat (1) is provided with an inlet, and the valve cover (5) is provided with an outlet; and the ball valve is characterized in that the valve cover (5) is provided with a tubular holeaxially extending inwards, a spring (4) is sleeved on the outer wall of the tubular hole, one end of the spring (4) is installed on the inner wall of the valve cover (5), the other end of the spring (4) is installed on a spring seat (3), a first guide column (31) matched with the tubular hole and capable of moving back and forth in the tubular hole is arranged on the spring seat, and the spring seat (3) is propped against the spherical valve core. Compared with the prior art, the utility model has the advantages that the ball valve can ensure that the spring is not skew in the direction of motion during the compression and stretching process and ensure the directions of the spring force consistent, the influence on the inertia force of the spherical valve core is little due to the action of the spring, and the closing speed and the closing lag angle of the spherical valve core are smaller.

Description

A kind of ball valve

Technical field

The utility model relates to a kind of ball valve.

Background technique

Pump valve is the key components and parts of reciprocating pump.Pump valve mainly adopts self-acting valve, has only when the transfer of highly viscous medium, just adopts Forced Valve.Self-acting valve is divided into spring valve (valve is mainly closed by the spring force effect, mostly is cone valve and flap type) and deadweight valve (valve is closed by the self gravitation effect, mostly is ball valve) again.

The characteristics of spring valve are: spring action is on spool, spring force can increase the load on the spool, weaken the valve core movement The Effect of Inertia Force, guarantee its less closing velocity and close retardation angle, reduce the loss of impacting and refluxing, the structure of common spring valve sees shown in the accompanying drawing 1 that four guide vanes of spool 2 ' cooperate with the hole of valve seat 1 ', makes its unlikely generation deflection in movement process; Spring 4 ' upper end is contained on the spring seat 5 ', and the lower end is contained on the spool 2 ', and spring force can overcome the inertial force of spool, and it can in time be closed, and has reduced the impact and the return loss of spool.

The characteristics of deadweight ball valve are:

1, spherical spool is the ball of standard steel ball and other material, and is simple in structure, interchangeability is strong, and mounting or dismounting are convenient, is convenient to clean.

2, spherical spool in opening and closing and moving with rotatablely moving, wearing and tearing evenly, and the impurity that spherical spool and sealing contact surface adhere to is eliminated easily, and so-called " self-cleaning " effect is promptly arranged.

3, sealing contact surface is less, good seal performance, and the volumetric efficiency of pump is higher.

4, the valve clearance runner is level and smooth, and hydraulic resistance is little.

The structure of common deadweight ball valve sees shown in the accompanying drawing 2 that spherical spool 6 ' carries out in the process of opening and closing at the opening to valve seat 8 ', and four convex surface guiding by valve guide sleeve 7 ' can guarantee that deflection does not take place for it.

But because automatic ball valve does not have spring, the inertia force influence of spherical spool is bigger, the closing velocity of spherical spool and to close retardation angle bigger, impact and return loss also bigger, therefore ball valve only is applicable to per minute reciprocal time lower (≤150 times/minute), the pump that flow is little.

The model utility content

Technical problem to be solved in the utility model is to provide a kind of inertia force influence of spherical spool less at above-mentioned prior art, the closing velocity of spherical spool and close the less ball valve of retardation angle.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: this ball valve, comprise the valve body of forming by valve seat and valve bonnet, the movable spherical spool that is arranged on valve inner, described valve seat has import, described valve bonnet has outlet, it is characterized in that: described valve bonnet has an inside axially extended [, one spring housing is located on the [outer wall, and this spring one end is installed on the valve bonnet inwall, this spring the other end mounts elastically, this spring seat is provided with first directional post that can move around at [that matches with [, and described spring seat and described spherical spool offset.

As improvement, the inside of described valve seat is provided with four second directional posts at the import position, and described spherical spool promptly is arranged in the middle of these four second directional posts.

Preferably, between described valve seat and the described valve bonnet for being threaded.

Compared with prior art, advantage of the present utility model is: the valve inner at ball valve is provided with spring, and spring housing is located on the [outer wall of valve bonnet, first directional post that can move around at [match with [is set on the spring seat, and spring seat and spherical spool are offseted, can guarantee that spring is in the process of compression, extension, it is crooked that moving direction is unlikely to, guarantee the unanimity of spring force direction, because the effect of spring has been arranged, the inertia force influence of spherical spool is less, the closing velocity of spherical spool and to close retardation angle less.

Description of drawings

Fig. 1 is the plan view and the A-A sectional drawing of common spring valve in the prior art;

Fig. 2 is common ball valve plan view and a B-B sectional drawing in the prior art;

Fig. 3 be among the utility model embodiment ball valve plan view and C-C to sectional drawing.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Ball valve as shown in Figure 3, comprise the valve body of forming by valve seat 1 and valve bonnet 5, the movable spherical spool 2 that is arranged on valve inner, valve seat 1 has import, the inside of valve seat 1 is provided with four second directional posts 11 at the import position, described spherical spool 2 promptly is arranged in the middle of these four second directional posts; Valve bonnet 5 has outlet, valve bonnet 5 has an inside axially extended [51, one spring 4 is set on the [outer wall, and these spring 4 one ends are installed on valve bonnet 5 inwalls, these spring 4 the other ends are installed on the spring seat 3, this spring seat 3 is provided with first directional post 31 that can move around at [that matches with [, and described spring seat 3 offsets with described spherical spool.

Spherical spool 2 matches with four directional posts of valve seat 1, forms the guiding of spherical valve core movement, unlikely generation deflection when guaranteeing that spherical spool opens and closes; The spring seat 3 that spring 4 is housed matches with the [51 of valve bonnet 5, forms the motion guide of length of spring compressed, elongation, guarantees spring in the process of compression, extension, and it is crooked that moving direction is unlikely to, and guarantees the unanimity of spring force direction; Spring 4 is pressed on the spherical spool 2 by spring seat 3, thereby makes present embodiment form the spring ball valve; Connect together with screw thread between valve seat 1 and the valve bonnet 5, formed the combination brake switch and proporting of whole part one.

The ball valve of present embodiment except both having the characteristics of ball valve, has again outside the spring valve advantage, also has following characteristics:

1, the liquid area of passage is big, flow velocity is low, resistance is little, and energy loss is few;

2, because spherical spool is to close under the spring force effect, spherical valve core movement inertia force influence reduces, so the reciprocal time of reciprocating pump can bring up to about 300 times/minute, the spherical spool of same diameter, and the flow of pump can double.

Claims

1, a kind of ball valve, comprise the valve body of forming by valve seat (1) and valve bonnet (5), the movable spherical spool (2) that is arranged on valve inner, described valve seat (1) has import, described valve bonnet (5) has outlet, it is characterized in that: described valve bonnet (5) has an inside axially extended [(51), one spring (4) is set on the [outer wall, and these spring (4) one ends are installed on valve bonnet (5) inwall, this spring (4) the other end is installed on the spring seat (3), (3) are provided with first directional post (31) that can move around at [that matches with [on this spring seat, and described spring seat (3) offsets with described spherical spool.

2, ball valve according to claim 1 is characterized in that: the inside of described valve seat (1) is provided with four second directional posts (11) at the import position, and described spherical spool (2) promptly is arranged in the middle of these four second directional posts (11).

3, ball valve according to claim 1 and 2 is characterized in that: between described valve seat (1) and the described valve bonnet (5) for being threaded.