CN2177147Y

CN2177147Y - Adjustable flow vertical lift check valve

Info

Publication number: CN2177147Y
Application number: CN 93226231
Authority: CN
Inventors: 房殿武
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-08-24
Filing date: 1993-08-24
Publication date: 1994-09-14
Anticipated expiration: 2003-08-24

Abstract

The utility model relates to an adjustable flow vertical lift check valve, which is characterized in that a shaft seat 16 which is supported by a horizontal shaft 8 is arranged on a center pilot sleeve 6 in a valve body 4, and one end of the shaft seat extends out the valve body 4 and reaches in a control box 11 which is connected with the valve body 4. The end part of the shaft seat is tightly fixed with a worm wheel 15 and is engaged with a worm screw 14. A valve flap spacing cam wheel 7 is tightly fixed on a horizontal shaft 18. The advantages of the utility model are that the adjustable flow vertical lift check valve has the function of the vertical lift check valve and gate valves or (stop valves), making the outlet pipeline of the pump simplify, and the flow quantity can be adjusted in the running of the pump. The valve can be closed when the pump starts up, and the overloading can be prevented.

Description

Adjustable flow vertical lift check valve

The utility model relates to a kind of vertical lifting safety check, particularly relates to a kind of vertical lifting safety check that collects non-return, is adjusted to the can regulate flow of one.

Present existing vertical lifting safety check, its structure are flaps in the valve body substantially, and the vertical centre guide sleeve moves.When the fluid in the pump discharge pipeline flows, back down flap and pass through, if when adverse current takes place fluid in the pipeline, then flap falls cut-off valve automatically.Therefore this valve can only play the non-return effect, flow that can not control valve.In production practices, the pipe-line system of sealing, when pump startup, in order to prevent over burdening, require the valve closing of pump discharge front end, and existing vertical lifting safety check does not satisfy the sealing problem that starts requirement and pipeline maintenance, so general also the need installed a gate valve at the upper pipeline of vertical lifting safety check, this just makes the inconvenience of pipe-line system complex operations.

The purpose of this utility model is the vertical lifting safety check of a kind of can regulate flow of design, and the function of vertical lifting safety check is promptly arranged, and has the function that gate valve (or stop valve) is regulated flow and keying again.

The utility model is achieved in that a kind of vertical lifting safety check of can regulate flow, comprise import is arranged on the valve body, outlet, valve seat, flap, gusset, centre pilot cover, it is characterized in that above centre pilot cover, having a horizontal axis to be bearing on the both sides axle bed in the valve body, and an end stretches out in the control box that valve body extends to valve body links to each other, its end tighten a worm gear and with a worm meshing, a top fastening flap limit cam of horizontal axis.

Following accompanying drawing has provided embodiment of the present utility model, is described further in conjunction with the accompanying drawings.

Fig. 1 is a principal section schematic representation of the present utility model;

Fig. 2 is a schematic top plan view of the present utility model;

Fig. 3 takes off the A of control behind the case lid to schematic representation for Fig. 2.

Symbolic representation among Fig. 1-3 is as follows: import 1, valve seat 2, flap 3, valve body 4, gusset 5, centre pilot cover 6, flap limit cam 7, horizontal axis 8, outlet 9, stuffing box packing 10, control box 11, control case lid 12, handwheel 13, worm screw 14, worm gear 15, axle bed 16.Horizontal axis 8 vertically passes the center line of valve body 4, and flap limit cam 7 is fastened on the centre of horizontal axis 8.Worm screw 14 is bearing in the both sides of control box 11, and there is a handwheel 13 that is connected with worm screw 14 outside of control box 11.In the joint of valve body 4 and control box 11, stuffing box packing 10 is arranged.

Working principle of the present utility model is such: the utility model is connected in the pipe-line system of sealing, when needs are regulated flow, with handwheel 13 rotations, promptly drive worm screw 14 and worm gear 15 rotations, because worm gear 15 is fastened on the horizontal axis 8, makes angle of horizontal axis 8 corresponding rotations, thereby makes flap limit cam 7 also change an angle, flap 3 can rise or descend, i.e. the can regulate flow.When pump is starting, need close the preceding valve of pump discharge, at this moment as long as when forwarding flap limit cam 7 to vertical position, can tightly suppress flap 3, valve cuts out, because the self-lock mechanism of worm gear, worm screw itself, as long as rotation hand wheel 13 just can make 7 actions of flap limit cam, so stable working is reliable.

The utility model has the advantages that and realized that a valve can possess the function of vertical lifting safety check and gate valve (or stop valve), the pump discharge pipeline is simplified, can be implemented in and regulate flow in the pump operation, can when pump startup, prevent overload by throttle down again, simultaneously can when termination of pumping, prevent adverse current again, collect non-return, be adjusted to one.The utility model is simple in structure, operation and maintenance is convenient, reliable operation.

Claims

1, a kind of vertical lifting safety check of can regulate flow, comprise import (1) is arranged on the valve body (4), outlet (9), valve seat (2), flap (3), gusset (5), centre pilot cover (6), it is characterized in that having a horizontal axis (8) to be bearing on the both sides axle bed (16) in the valve body (4) in the top of centre pilot cover (6), and an end stretches out valve body (4) and extends in the control box (11) that links to each other with valve body (4), its end tightens a worm gear (15) and is meshed a top fastening flap limit cam (7) of horizontal axis (8) with a worm screw (14).

2,, it is characterized in that horizontal axis (8) is vertical and pass the center line of valve body (4) that flap limit cam (7) is fastened on the centre of horizontal axis (8) according to the vertical lifting safety check of the described can regulate flow of claim 1.

3, according to the vertical lifting safety check of claim 1,2 described can regulate flows, it is characterized in that worm screw (14) is bearing in the both sides of control box (11), there is a handwheel (13) that is connected with worm screw (14) outside of control box (11).

4,, it is characterized in that in the joint of valve body (4) and control box (11) stuffing box packing (10) being arranged according to the vertical lifting safety check of the described can regulate flow of claim 1.