CN205956442U - Novel manual diaphragm valve - Google Patents

Abstract

The utility model relates to a machinery valve field is a novel manual diaphragm valve particularly, its characterized in that it is fixed that valve rod lower extreme and case coupling part adopt two thrust ball bearing to support, is located the thrust ball bearing of case upper end, and the shaft shoulder and case upper surface through the valve rod carry out axial positioning, and when the valve was closed, the thrust ball bearing work of case upper end was located the thrust ball bearing at case open slot position, carries out axial positioning through case open slot upper surface and jump ring on the installation valve rod, during valve open, and the work of the thrust ball bearing at case open slot position. Compared with the prior art, the utility model, its advantage lies in: the service life of the diaphragm is prolonged, eliminate false stroke phenomenon, improved the performance accuracy of valve, diaphragm and the better laminating of seal face of the valve body have strengthened sealing performance, improved the circulation of medium, the dead angle of avoiding circulating exists.

Description

A kind of novel manual diaphragm valve

[technical field]

This utility model is related to machinery valve field, specifically a kind of novel manual diaphragm valve.

[background technology]

Diaphragm valve is a kind of block valve of specific form, and its outstanding feature is diaphragm lower body inner chamber and top Valve gap inner chamber separates, and not only ensure that the pure of working media, makes valve gap above diaphragm, valve rod and flap etc. simultaneously Part is not subject to dielectric corrosion, eliminates packing seal structure, and will not produce medium leakage.The barrier film made using soft material Piece, sealing is preferable.Diaphragm valve close be opened by control diaphragm move up and down realize, therefore its life-span takes Certainly in the fatigue performance of diaphragm.

Referring to Fig. 1, at present, diaphragm valve structure mainly has valve body, valve gap, handwheel, valve rod, valve element, diaphragm, and handwheel passes through Hand wheel nut is connected with valve rod, and the screwed hole with the top that externally threaded valve rod is raised up with valve gap is connected, stem bottom It is connected with valve element, valve element connects diaphragm, valve body is bolted with valve gap, and its operation principle is：When pressure medium enters Enter Valve controlling chamber, by controlling hand wheel rotating, band ovable valve stem rotates, thus driving diaphragm to move up and down, can control valve Opening and closing.

China's patent CN201420715153.X discloses one kind, structure diaphragm valve simple, easy to assembly, but due to Valve rod and valve element adopt snap fit, lead to metal friction to produce ferrum pin, cause diaphragm is had damage, reduce diaphragm and use In the life-span, it is understood that there may be false stroke phenomenon, lead to performance accuracy poor.And diaphragm fails to fit well with valve body sealing surface, Sealing property is not strong, there is circulation dead angle in the intake channel of valve body and exit passageway.

[utility model content]

The purpose of this utility model is to solve the deficiencies in the prior art, provides a kind of novel manual diaphragm valve, solves Metal friction in valve rod and valve element to diaphragm valve in use there is, produces ferrum pin, reduces diaphragm service life, and there is vacation Stroke phenomenon, lead to performance accuracy difference the problems such as.

To achieve these goals, design a kind of novel manual diaphragm valve, include valve body, valve gap, stop nut, handss Wheel, valve rod, valve element, thrust ball bearing and diaphragm, described handwheel is connected with valve rod by handwheel screw, described valve rod with spacing The screwed hole of nut connects, and the screwed hole at the top being raised up with valve gap is connected, and described valve element and diaphragm adopt screw Connect, described valve body is connected with valve gap by bolt it is characterised in that described valve rod lower end adopts two with valve element coupling part Thrust ball bearing is supported fixing, and positioned at the thrust ball bearing of valve element upper end, is entered with valve element upper surface by the shaft shoulder of valve rod Row axially position, during valve closing, the thrust ball bearing work of valve element upper end, positioned at the thrust ball axle of valve core opening groove location Hold, axially position is carried out with installing the jump ring on valve rod by valve core opening groove upper surface, during valve opening, valve core opening groove portion The thrust ball bearing work of position.

Adopt arc transition at neighbouring valve element active tunnel wall on described valve body, make diaphragm more preferable with valve body sealing surface Laminating.

Described valve body is provided with intake channel and exit passageway, curved surface mistake at described intake channel and exit passageway upper side corners Cross, improve the circulation of medium.

The intake channel of described valve body and exit passageway intermediate projections plane, described convex plane and described diaphragm following table The sealed muscle in face matches, and constitutes conducting and the closing of diaphragm valve.

This utility model compared with the existing technology, has an advantage in that：

1., by being supported fixing to valve rod and valve element using thrust ball bearing, change traditional clamping connection side Formula is so that valve rod and valve element are not at the job state that rubs, it is to avoid ferrum pin produces, and improves the service life of diaphragm, and And eliminate false stroke phenomenon, improve the performance accuracy of valve；

2. adopt arc transition at neighbouring valve element active tunnel wall on valve body, make diaphragm more preferable with valve body sealing surface Laminating is so as to sealing property strengthens；

3. surface blending at the intake channel of valve body and exit passageway upper side corners, improves the circulation of medium, it is to avoid Circulation dead angle exists.

[brief description]

Fig. 1 is the structural representation of background technology；

Fig. 2 is the structural representation of novel manual diaphragm valve of the present utility model；

Fig. 3 is the partial enlarged drawing of part A in Fig. 2；

Fig. 4 is the valve body structure schematic diagram of this utility model diaphragm valve；

In figure：1. handwheel 2. valve gap 3. valve rod 4. diaphragm 41. diaphragm pad, 5. valve body 51. arc transition section 52. surface blending section, 6. valve element, 71. bottom end bearing, 72 upper end bearing 8. stop nut.

[specific embodiment]

The utility model is described in further detail below in conjunction with the accompanying drawings, the structure of this novel manual diaphragm valve and principle pair It is very clearly for this professional people.It should be appreciated that specific embodiment described herein is only in order to explain this practicality New, it is not used to limit this utility model.

Presently in connection with drawings and Examples, this utility model is further described, all accompanying drawings are the signal of simplification Figure, it only illustrates basic structure of the present utility model.

As shown in Fig. 2 a kind of novel manual diaphragm valve, including handwheel (1), valve gap (2), valve rod (3), diaphragm (4), every Film gasket (41), valve body (5), valve element (6) and thrust ball bearing (71), (72), described handwheel (1) passes through screw and valve rod (3) Connect, described handwheel (1) lower end and stop nut (8) external cylindrical surface adopt spline connection, described stop nut (8) and valve rod (3) be threaded connection, by adjusting stop nut (8) position control valve rod (3) stroke, described valve rod (3) and valve gap (2) to The screwed hole at upper raised top connects, and described valve rod (3) lower end adopts two thrust ball bearings with valve element (6) coupling part (71), (72) are supported fixing, and described diaphragm pad (41) passes through screw and core valve (6) mode connects for screw with diaphragm (4), Described valve body (5) is connected with valve gap (2) by bolt.

As shown in figure 3, described valve rod (3) lower end and valve element (6) coupling part, positioned at the thrust ball axle of valve element (6) upper end Hold (71), axially position is carried out by the shaft shoulder of valve rod (3) and valve element (6) upper surface, when rotation hand wheel (1) closes valve, institute State bearing (71) work.

Described valve rod (3) lower end and valve element (6) coupling part, positioned at the thrust ball bearing at valve element (6) open slot position (72), axially position is carried out with installing the jump ring on valve rod (3) by valve element (6) open slot upper surface, when rotation hand wheel (1) is opened Open valve, described bearing (72) work.

Described new valve rod (3) and valve element (6) connected mode, it is to avoid valve rod (3) is in friction operation with valve element (6) State, effectively prevent the generation of ferrum pin, improves the service life of diaphragm (4), and it is existing to eliminate the false stroke of valve rod As.

As shown in figure 4, adopting arc transition (51) at the upper neighbouring valve element active tunnel wall of described valve body (5), make barrier film Piece (4) is preferably fitted with valve body (5) sealing surface, effectively provides the sealing of diaphragm valve.

Described valve body (5) is provided with intake channel and exit passageway, bent at described intake channel and exit passageway upper side corners Face transition (52), improves the circulation of medium, is effectively prevented medium and residues between valve body (5) and diaphragm (4).

The intake channel of described valve body (5) and exit passageway intermediate projections plane, described convex plane and described diaphragm (4) sealed muscle of lower surface matches, and constitutes conducting and the closing of diaphragm valve.

Claims (4)

1. a kind of novel manual diaphragm valve, include valve body, valve gap, stop nut, handwheel, valve rod, valve element, thrust ball bearing and Diaphragm, described handwheel is connected with valve rod by handwheel screw, and described valve rod is connected with the screwed hole of stop nut, and and valve gap The screwed hole at the top raising up connects, and described valve element and diaphragm adopt mode connects for screw, and described valve body passes through bolt and valve Lid connects it is characterised in that described valve rod lower end is supported fixing using two thrust ball bearings with valve element coupling part, position In the thrust ball bearing of valve element upper end, axially position, during valve closing, valve element are carried out by the shaft shoulder of valve rod and valve element upper surface The thrust ball bearing work of upper end, positioned at the thrust ball bearing of valve core opening groove location, by valve core opening groove upper surface and peace Jump ring on dress valve rod carries out axially position, during valve opening, the thrust ball bearing work of valve core opening groove location.

2. as claimed in claim 1 a kind of novel manual diaphragm valve it is characterised in that on described valve body neighbouring valve element activity logical Arc transition is adopted at road wall.

3. as claimed in claim 1 a kind of novel manual diaphragm valve it is characterised in that described valve body is provided with intake channel and going out Mouth passage, surface blending at described intake channel and exit passageway upper side corners.

4. as claimed in claim 1 a kind of novel manual diaphragm valve it is characterised in that the intake channel of described valve body and outlet Passage intermediate projections plane, described convex plane is matched with the sealed muscle of described diaphragm lower surface, constitutes diaphragm valve Conducting and closing.