CN2568900Y - Micro-resistance hammer removal check valve - Google Patents

Abstract

The utility model relates to a micro-resistance hammer removal check valve, which comprises a valve body, a valve plate, a sealing seat, a connecting rod, a valve rod, a valve seat, a valve cover, a diaphragm, an upper pressing plate, a lower pressing plate, a telescopic pressing plate, a hanging ring, a spring, etc. The utility model is characterized in that the space between the valve seat and the valve cover is formed into double diaphragm control chambers by the diaphragm and the upper and the lower pressing plates; an upper diaphragm chamber is fixed with the spring, and a lower diaphragm chamber is communicated with an inlet of the valve through a big and a small two passages; the upper end of the valve rod is fixed on the diaphragm by a press nut assembly through the upper and the lower pressing plates; the valve rod penetrates through centre holes of the valve seat in turn from top to bottom, and the lower end of the valve rod is hinged with the valve plate by the connecting rod. The utility model has the advantages of effective water hammer removal, small over water resistance, obvious energy-saving effect, and reliable action.

Description

Little resistance removes the hammer safety check

The utility model belongs to a kind of safety check.

In water supply and drainage pumping plant pipe-line system, various safety check are produced and used to operation control for convenience and elimination water hammer: at present as buffer valve, Tiny Drag Slow Shut Check Valves, multifunctional water pump control valve, DRV, elastic membrane damping check valve, ball check valve or the like.Various safety check respectively have pluses and minuses: the resistance as Tiny Drag Slow Shut Check Valves is little, and obvious energy-saving effect is arranged; Multifunctional water pump control valve to remove hammer effective; The reliable in action of elastic membrane damping check valve, multifunctional water pump control valve etc.But also there is not a kind of safety check effective except that hammer, that resistance is little that has simultaneously at present.

The purpose of this utility model provides a kind of little resistance and removes the hammer safety check, and it is effective that it has the hammer of removing simultaneously, the comprehensive advantage that resistance is little.

The purpose of this utility model is achieved in that it comprises valve body, valve plate, sealing seat, connecting rod, valve rod, valve seat, valve gap, diaphragm, top board, press table, telescopic pressure plate, suspension ring, spring, conduit, control valve, filter, plug-in mounting filter, plug-in mounting one-way valve, gland nut assemblying body, copper sheathing etc.Offer the valve inlet and the valve export that are connected with the valve inner cavity on the valve body, sealing seat is fixed in the valve inner cavity and with valve inlet and valve export and separates, valve seat is equipped with in the top of another valve body openings that is connected with the valve inner cavity, valve gap is equipped with in the valve seat top, the formed internal cavities of valve gap and valve seat is across a diaphragm, top board and press table are being fixed in the diaphragm both sides, diaphragm is divided into upper diaphragm chamber and lower membrane chamber, spring is installed and has an aperture between the top board of upper diaphragm chamber and the valve gap and communicate with atmosphere, lower membrane chamber has big or small two passages to be connected with valve inlet, wherein major path is opened on valve body and the valve seat shell, and be fitted with plug-in mounting filter and plug-in mounting one-way valve, cross-section area is about 5%～50% of diaphragm chamber's area, small channel is formed by connecting by an external catheter, is serially connected with control valve and filter on the conduit.The body cavity device has the valve rod of control valve plate action, and the valve rod upper end is fixed on the diaphragm by top board and press table with the gland nut assembly parts, and its lower end was hinged by connecting rod and valve plate after the valve rod hypomere passed valve base center hole.Because valve plate is to do garden arc motion around fulcrum, and valve rod is a straight line motion, so valve rod is subjected to a transverse force effect, make the power increasing of valve rod compressing valve seat even make valve rod become curved, in order to offset the transverse force on the valve rod, protruded one section guide sleeve below the valve seat, guide sleeve is the hollow cylinder with two grooves, and the effect of groove is that connecting rod is passed through.Having an aperture on the valve gap can avoid the air of upper diaphragm chamber to be compressed and sewage is discharged.Valve base center hole should the sliding sleeve valve rod, stops valve export water to enter lower membrane chamber again, so locate a nested copper sheathing that is added with seal ring.

Working principle of the present utility model is as follows: during installation, valve inlet water pump waterexit end, valve export connects the rear tube road, before water pump is opened, because valve export hydraulic pressure is far above valve inlet hydraulic pressure, this pressure reduction tightly is pressed on valve plate on the sealing seat and water is cut off, and the spring force of upper diaphragm chamber acts on the valve plate by pressing plate, valve rod, connecting rod in addition, and the comprehensive function of these two kinds of power is closed tightly with valve plate.After water pump is opened, valve inlet hydraulic pressure raises, press water produces the power that valve plate is opened that promotes on the one hand, conduit by small channel enters lower membrane chamber on the other hand, one-way valve is housed in the major path, and valve inlet water can not enter lower membrane chamber, and the current that enter lower membrane chamber are restricted, the active force that adds upper spring can only be opened valve plate under certain speed.When water pump is shut down; the very fast decline of valve inlet hydraulic pressure; spring promotes pressing plate and descends; the water of lower membrane chamber is arranged to valve inlet by two passages of size; because water displacement is big; so diaphragm pressing plate rate of descent is very fast; after treating that valve plate rotates to an angle; valve plate is subjected to the thrust of water again, and it is faster that valve plate is closed, when diaphragm and pressing plate drop to certain distance; valve plate reaches the angle of closing about 80%; telescopic pressure plate on the press table bars up major path, and only remaining a small gangs of current flow to valve inlet by the conduit of small channel from lower membrane chamber, and the rate of outflow can be regulated by modulating valve; make diaphragm and pressing plate rate of descent very slow; thereby make valve plate close very slowly, in the valve process of whole pass, formed two stage Closing Law first quick and back slow.This closes in normal work period, and the press water of lower membrane chamber upwards pushes away diaphragm and pressing plate, and diaphragm and pressing plate are by valve rod, and connecting rod is tightly held valve plate, makes the deadweight of valve plate can not oppress water, and water resistance is significantly reduced.

Because adopt such scheme, this valve is minimum to the resistance of water, have slow opening simultaneously, two stage Closing Law first quick and back slow can be eliminated water hammer effectively so this closes not only, and have little resistance function, and energy-saving effect is remarkable.

The utility model is described in further detail below in conjunction with accompanying drawing.

Accompanying drawing is the embodiment of a kind of concrete structure of the present utility model.

Little resistance of the present utility model removes the hammer safety check, comprises valve body 1, valve plate 2, sealing seat 3 connecting rod 3A, conduit 4, control valve 5, filter 6, plug-in mounting filter 7, plug-in mounting one-way valve 8, valve seat 9, telescopic pressure plate 10, press table 11, diaphragm 12, top board 13, gland nut assembly parts 14, spring 15, valve gap 16, suspension ring 17, valve rod 18, copper sheathing 19 etc.The sealed seat 3 of the inner chamber of valve body 1 is separated into valve inlet 101 and valve export 102, and valve body 1 is provided with hinge base 103, major path 104, major path seal ring 105, positioning block 106.Be connected with valve seat 9 with screw on the opening of another valve body 1 that communicates with valve export 102, offer major path 901 on the valve seat 9, the top of valve seat 9 is connected with valve gap 16 with screw again, the inner chamber of valve seat 9 and valve gap 16 is by diaphragm 12 and top board 13, press table 11 is separated into upper diaphragm chamber 1201 and lower membrane chamber 1202, be mounted with spring 15 between the valve gap 16 of upper diaphragm chamber 1201 and the top board 13, offer the aperture 1602 that is communicated with atmosphere on the valve gap 16, valve gap 16 end faces are bolted with suspension ring 17, and being mounted with seal ring 1601, lower membrane chamber 1202 is connected with valve inlet 101 by big or small two passages.Major path is formed by connecting by the major path 901 on major path on the valve body 1 104 and the valve seat 9, be fitted with plug-in mounting filter 7 and plug-in mounting one-way valve 8 on the major path, make water flow to valve inlet 101 from lower membrane chamber 1202, small channel is by conduit 4 one termination valve inlets 101, another termination lower membrane chamber 1202 and forming, be serially connected with control valve 5 and filter 6 on the conduit 4, the endoluminal means of valve body 1 has the valve rod 18 of a control valve plate 2 actions, the upper end of valve rod 18 is fixed on the diaphragm 12 by top board 13 and press table 11 with gland nut assembly parts 14, after valve rod 18 hypomere cunnings are passed the center hole of the copper sheathing 19 on valve seat 9 center holes, its lower end and connecting rod 3A are hinged, connecting rod 3A is hinged by hinge base on the valve plate 2 202 and valve plate 2 again, in order to prevent to leak, be mounted with seal ring 1901 on the copper sheathing 19, the connection strap 203 on the valve plate 2 again with valve body 1 on hinge base 103 hinged and can be around hinge base 103 rotations.

Claims (8)

1, a kind of little resistance removes the hammer safety check, comprise valve body, valve plate, sealing seat, connecting rod, valve rod, valve seat, valve gap, diaphragm, top board, press table, telescopic pressure plate, suspension ring, spring etc., it is characterized in that body cavity is divided into three openings: valve inlet, the opening of valve export and the affixed valve seat of another one, affixed again valve gap above the valve seat, in the formed internal cavities of valve gap and valve seat across a diaphragm, top board and press table are being fixed in the diaphragm both sides, diaphragm is divided into upper diaphragm chamber and lower membrane chamber, in the upper diaphragm chamber, between top board and the valve gap spring is installed, and open an aperture and communicate with atmosphere, lower membrane chamber has big or small two passages to be connected with valve inlet, body cavity is being settled the valve rod of control valve plate action, the valve rod upper end is fixed on the diaphragm by top board and press table with the gland nut assembly parts, and its lower end was hinged by connecting rod and valve plate after valve rod hypomere cunning was passed valve base center hole.

2, little resistance according to claim 1 removes the hammer safety check, it is characterized in that the major path that lower membrane chamber is connected with valve inlet is opened on valve body and the valve seat shell, and is fitted with plug-in mounting filter and plug-in mounting one-way valve.

3, little hammer safety check that removes according to claim 2, the cross-section area that it is characterized in that major path is 5%～50% of diaphragm chamber's cross-section area.

4, little resistance according to claim 1 removes the hammer safety check, it is characterized in that the small channel that the lower piston chamber is connected with valve inlet is formed by connecting by external catheter, is serially connected with control valve and filter on the conduit.

5, little resistance according to claim 1 removes the hammer safety check, it is characterized in that the valve seat bottom has the guide sleeve that is used for stem guiding, and guide sleeve is the hollow cylinder with two grooves.

6, little resistance according to claim 1 removes the hammer safety check, it is characterized in that being equipped with on the valve gap suspension ring.

7, little resistance according to claim 1 removes the hammer safety check, it is characterized in that being mounted with on the press table telescopic pressure plate that is used to close major path.

8, little resistance according to claim 1 removes the hammer safety check, it is characterized in that offering on the valve gap aperture.