CN2271647Y - Flow automatic control valve - Google Patents

Abstract

The utility model relates to a flow automatic control valve. The inner part of a valve body is provided with a separating cavity, so the valve body is divided into a left cavity and a right cavity. The side wall of the left cavity is provided with a water inlet which is provided with a valve, and the valve is provided with a regulating rod, a connecting rod, a pressure regulating system composed of a diaphragm cavity and a balance spring. A jaw opening at the septum of the right cavity is provided with a valve seat which is provided with a valve head, the regulating rod and a scale. The lower part of the scale is provided with a stuffing box. The control valve with a novel structure solves the problems that the existing flow control valve has small pressure difference and small flow at the distal end, and is hard to be regulated to a set flow, and the uneven flow distribution results in uneven heat for users of the heat supply network system, and can be extensively used as a control device for a heat supply pipeline system.

Description

Automatic control flow valve

The utility model relates to a kind of flow automatic control device of heating network hydraulic regime non-equilibrium state.

Flow control automatically is than in the extensive network, particularly need the major issue that solves in the central heat supply pipe network, big at pipe network system near-end pressure reduction in service, thereby the flow that obtains is big, far-end pressure reduction small flow is also little and be difficult to be adjusted to the setting flow, and assignment of traffic is irregular to cause the user of heating network system cold and hot irregular.Solved the flow control problem in the past and adopt the pressure reduction after and before the valve of controlling manually operated valve at differential pressure control valve of front end installation of manual adjusting control valve to guarantee manually operated valve quantitative control flow rate under the definite value aperture, the problem that this technology exists is that control accuracy is low, installation and maintenance are inconvenient, calculates the adjustment complexity.In order to address this problem; people have done multiple effort; the patent application that a key name is called " pressure balance type flow control valve " number is disclosed as Chinese patent " 94213000.6 "; as the Flow-rate adjustment element of fluid transmission with the pipe network control system; be by valve body; valve seat; handle; spool; compositions such as balanced piston component; be applicable to big flow volume delivery pipe network system; because this device is installing anti-rotation core in spool; and valve seat; anticorrosion with painting erosion protective layer on the spool surface of contact; therefore can improve the corrosion protection ability of valve; increase the life-span, set up equalizing piston in the lower end of valve and can reduce steering force, improve the reliability of operation.This device only is applicable to the fluid transmission of industries such as oil, chemical industry, and using scope is narrower.

Task of the present utility model is: design that a kind of volume is little, cost is low, Installation and Debugging are convenient, control flow rate quantizes to show, do not need external power, pressure reduction is regulated in variation according to pipe network medium pressure automatically, and the quantitative automatic control of flow, maintenance flow are pressed the autocontrol valve of the constant supply of design load.

Task of the present utility model realizes as follows: have a separate space to be divided into chamber, the left and right sides in the valve body of automatic control flow valve, chamber, left side sidewall has water inlet, valve is housed on it, regulating lever is arranged on the valve, its upper end is connected to connecting rod, the upper end of connecting rod places in the diaphragm chamber, diaphragm is fixed between the upper and lower covers, diaphragm is fastened on the upper end of connecting rod by the hole on it by last lower nut, at the upper tip of connecting rod balance spring is housed, and balance spring is positioned at spring shield, between diaphragm valve and valve body, be provided with the back pressure pipeline, be positioned at the right chamber of valve body, the opening on the next door is equipped with valve seat, and the open type valve head is housed on it, in the valve head upper end regulating lever is housed, dial is equipped with in outside, upper end at regulating lever, in the bottom of dial stuffing box is housed, and stuffing box is fixed on the valve body.

The utility model is not owing to need external power, be not subjected to the influence of external magnetic field or electric wave, be changed to power with pressure reduction and can reach that pressure reduction is constant, the purpose of constant flow, use the utility model to need not to carry out complicated calculations, pressing the scale value of manually-operated gate sets up, can satisfy usage requirement, even pressure in the pipe network, when pressure reduction changes, flow control accuracy is also constant; The utility model prevents that other people from arbitrarily turning, and helps heating management owing to adopt special tool to set up; The utility model is owing to self can't be blue, and is during connection that the flange on the pipeline is fastening with internally piloted valve with screw rod, installs, adjusts, keeps in repair, maintains all very convenient like this.

Fig. 1 is the utility model front section view;

Fig. 2 is the utility model installment state view.

A most preferred embodiment of the present utility model, as figure, the cavity of the valve body 20 of automatic control flow valve has a next door, has water inlet 1 at its left side wall, and valve 2 is equipped with at the water inlet place, and this valve is a card formula valve.Regulating lever 3 is arranged on the valve, there is locking nut 4 lower end of regulating lever, and being connected has joint 7 on the valve body, and the upper end of regulating lever is connected to connecting rod 6, be positioned at joint 7, the upper end of connecting rod 6 places in the diaphragm chamber, and between the protecting cover 8,9, diaphragm 13 was fastened on the upper end of connecting rod 6 by last lower nut about diaphragm 13 was fixed on, upper tip at connecting rod 6 is equipped with balance spring 10, spring 10 is arranged in spring shield 11, and there is a nut cap 12 on the top on the spring shield, adopts between spring shield 11 and diaphragm 13 loam cakes to be threaded.Be provided with back pressure pipeline 14 between diaphragm valve and valve body 20, be positioned at the right chamber of valve body 20, valve seat 19 is equipped with in next door upper shed place, and open type valve head 18 is housed on it.Be equipped with regulating lever 16 on the open type valve head, stuffing box 21 is equipped with in the bottom of scale bar, and stuffing box 21 is fixed on the valve body, in the upper end of scale bar flow scale dish 17 is housed.Between the water inlet of valve and water outlet two flanges in grid, two flanges are fused, thereby the valve between two flanges is clamped and fixes by bolt.

The working principle and the working procedure of this device are: when one timing of flow control valve valve opening, the pressure reduction variation can cause that control flow rate changes before the valve, meanwhile, pressure regulator valve is that power moves up and down by diaphragm with pressure reduction, drive valve and change the pressure regulating valve cross-sectional flow area, be that circulating resistance changes automatic constant flow rate valve pressure reduction, pressure reduction is constant, and amount of restriction can be constant.Its concrete working procedure is: the valve body that is made of left chamber 1 and right chamber 2, adjust in opened condition through regulating lever 3, water enters in the valve body 20, inner wall pressure by joint 7 is delivered to chamber under the diaphragm, when pressure increases, diaphragm applied force, the elastic force that overcomes spring upwards drives the drive link motion and makes valve 2 upwards increase resistance to reduce circulation area to adapt to the balance of chamber, valve seat 19 left and right sides pressure reduction, when valve body left side cavity pressure reduces, pressure in the right chamber 15 is delivered on the diaphragm by pipeline 14 and in the chamber 9 diaphragm is moved downward, thereby reduce resistance and increase flow and circulation area, pressure reduction is constant before and after making the valve of valve seat 19, and the adjustment spring in the spring shield is used for the balance pressure reduction of diaphragm up and down.After pressure reduction is constant, can adjust flow on demand, its adjusting method is: with special tool dwang 16, press the flow scale value of dial 17 and set up.

Claims (4)

1, a kind of automatic control flow valve, it comprises valve body, separate space in the valve body is divided into chamber, the left and right sides, chamber, a left side is provided with pressure regulating system, right chamber is provided with flow control system, it is characterized in that: the valve body left side wall has water inlet, valve is housed, automatic regulating lever is arranged on the valve, its upper end is connected to connecting rod, and the upper end of connecting rod places in the diaphragm chamber, and diaphragm is fixed between the upper and lower covers, diaphragm is fastened on the upper end of connecting rod by last lower nut, upper tip at connecting rod is equipped with balance spring, and balance spring is positioned at spring shield, is provided with the back pressure pipeline between diaphragm chamber and valve body, the opening that is positioned on the endoseptum of the right chamber of valve body is equipped with valve seat, the open type valve head is housed on it, the manual adjustment bar is housed, the flow scale dish is housed in the outside, upper end of manual adjustment bar in the valve head upper end, stuffing box is equipped with in bottom at the flow scale dish, and said stuffing box is fixed on the valve body.

2, control valve as claimed in claim 1 is characterized in that: adopt between spring shield and the diaphragm loam cake to be threaded.

3, as claim 1,2 described control valves, it is characterized in that: the valve at said valve body water inlet place is a card formula valve.

4, as claim 1,2 described control valves, it is characterized in that: between the water inlet of valve and water outlet two flanges in grid, two flanges are fused, thereby the valve between two flanges is clamped and fixes by bolt.

Images