CN211599832U

CN211599832U - Self-fusing flange and valve port connecting node structure for electromagnetic differential pressure valve

Info

Publication number: CN211599832U
Application number: CN202020073130.9U
Authority: CN
Inventors: 盛一冰; 郑建华
Original assignee: Ningbo Instrument Valve Factory
Current assignee: Ningbo Instrument Valve Factory
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-09-29
Anticipated expiration: 2030-01-14

Abstract

The utility model provides a self-fluxing flange for an electromagnetic differential pressure valve and a valve port connecting node structure, wherein the peripheral surface of an annular body of the flange comprises a first axial surface (11), a second radial surface (12), a third oblique surface (13) and a main axial body surface (10) from front to back, and is characterized in that a transition section is additionally arranged between the second radial surface (12) and the third oblique surface (13), and the transition section comprises a transition axial surface (142) and an annular branch port (141) which protrudes out of a part of the surface of the transition axial surface (142) along the radial direction; the gap between the flange and the valve body is covered by a self-melting layer formed by melting the annular branch opening, and the welding wire melting layer covers the self-melting layer and spreads to cover the flange and the valve body. The utility model provides a problem of welding wire length restriction, stopped the phenomenon of pressing from both sides sediment gas pocket and cold crack, compensatied the corresponding defect of traditional structure and welding method.

Description

Self-fusing flange and valve port connecting node structure for electromagnetic differential pressure valve

Technical Field

The utility model belongs to the technical field of the valve, especially, relate to a self-fluxing formula flange and valve port connected node structure for electromagnetic pressure differential valve.

Background

Fig. 1 is a schematic cross-sectional view of a conventional flange 1 that is engaged with an electromagnetic differential pressure valve (2 in fig. 3), as shown in fig. 1 to 4, the flange 1 needs to be fixed to a valve port of a valve body 2 of the electromagnetic differential pressure valve by welding, and has high requirements on welding strength, slag inclusion, and air hole leakage rate, and the conventional process adopts electric welding;

as shown in fig. 2 and 4, the flange 1 of the prior art takes the joint with the valve port of the valve body 2 as the front end, the peripheral surface of the annular body of the flange 1 includes an axial first surface 11, a radial second surface 12, an oblique third surface 13 and an axial body surface 10, which are sequentially connected from front to back, the axial first surface 11 is perpendicular to the radial second surface 12, and both are in direct contact with the corresponding surfaces of the valve port, specifically, after the valve port is in butt joint with the flange, the axial first surface 11 abuts against the inner wall surface 21 of the valve port, the radial second surface 12 abuts against the end surface 22 of the valve port, an annular region is defined by the valve port inclined surface 24 of the valve port, the valve port axial surface 23 and the oblique third surface 13 of the flange, and after the annular region is welded by the welding wire, as shown in fig. 4, the welding wire melting layer 3 completely covers the annular region and can partially extend to the body surface 20 of the valve body 2, thereby realizing the welding connection and fixation.

The disadvantages are as follows: 1. due to the length limitation of the welding wire, sectional welding is required; 2. the welding rod and the valve raw material have slight difference, and any welding rod is provided with a protective layer, so that the phenomena of air holes and cold cracks are easy to occur, and the vacuum degree of the product cannot be further improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses carry out institutional advancement to the flange for the electromagnetic pressure difference valve, provided the electromagnetic pressure difference valve with from melting formula flange to corresponding improvement has also been made to flange and valve port connected node structure, specifically is:

the peripheral surface of an annular body of the self-melting flange comprises a front axial first surface, a radial second surface, an oblique third surface and an axial main body surface, wherein the axial first surface, the radial second surface, the oblique third surface and the axial main body surface are arranged from front to back, a transition section is additionally arranged between the radial second surface and the oblique third surface, and the transition section comprises a transition axial surface and an annular branch port which protrudes out of a part of the surface of the transition axial surface along the radial direction.

Furthermore, the front side surface of the annular branch port is directly connected with the radial second surface.

Further, the front side of the annular branch port is coplanar with the radial second surface.

Furthermore, when the valve is in butt joint with the valve port, the axial first surface is abutted against the inner wall surface of the valve port, the radial second surface is abutted against the end surface of the valve port, and the annular branch port protrudes out of the axial surfaces of the valve port on the two sides and the transition axial surface of the flange.

Furthermore, when the valve is in butt joint with the valve port, the transition axial surface is coplanar with the valve port axial surface of the valve port.

Furthermore, the material of the annular branch port is consistent with the whole material of the flange.

The electromagnetic differential pressure valve port connecting node structure is characterized in that the flange butted with the valve port adopts the self-melting flange for the electromagnetic differential pressure valve.

Furthermore, a self-melting layer formed by melting the annular branch opening covers a gap between the flange and the valve body, and a welding wire melting layer covers the self-melting layer and spreads to cover the flange and the valve body.

The utility model disclosesSolution (II)The problem of limitation of the length of the welding wire is solved, the phenomena of slag inclusion, air holes and cold cracks are avoided, and the corresponding defects of the traditional structure and the welding method are overcome.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a schematic cross-sectional view of a prior art flange;

FIG. 2 is an enlarged view of the portion circled A in FIG. 1;

FIG. 3 is a schematic cross-sectional view of a prior art flange welded to a valve body;

FIG. 4 is an enlarged view of the portion circled B in FIG. 3;

FIG. 5 is a schematic cross-sectional view of a modified flange;

FIG. 6 is an enlarged view of the portion circled C in FIG. 5;

FIG. 7 is a schematic cross-sectional view of the improved flange in assembled relation with the valve body, but not yet welded thereto;

FIG. 8 is an enlarged view of the portion circled D in FIG. 7;

fig. 9 is a schematic enlarged sectional view after two times of welding.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 5 to 9, the self-fluxing flange for electromagnetic differential pressure valve of the present invention,

the outer peripheral surface of the annular body comprises a front-to-back axial first surface 11, a radial second surface 12, an oblique third surface 13 and an axial main body surface 10, the improvement is that a transition section is additionally arranged between the radial second surface 12 and the oblique third surface 13, the transition section comprises a transition axial surface 142 and an annular branch port 141 which protrudes out of a part of the surface of the transition axial surface 142 in the radial direction, the front side surface of the annular branch port 141 is directly connected with the radial second surface 12, and preferably, the front side surface of the annular branch port 141 is coplanar with the radial second surface 12;

after the valve port is in butt joint with the flange 1 ', the axial first surface 11 abuts against the inner wall surface 21 of the valve port, the radial second surface 12 abuts against the end surface 22 of the valve port, and the transition axial surface 142 is coplanar with the valve port axial surface 23 of the valve port, so that the annular branch port 141 protrudes out of the valve port axial surfaces 23 at the two sides and the transition axial surface 142 of the flange 1';

preferably, the cross-sectional area of the protruding portion of the annular branch port 141 is substantially equal to the cross-sectional area of the welding wire, the annular branch port 141 is wound around the flange, the annular branch port 141 is a part of the flange, and the material of the annular branch port 141 is the same as the material of the whole flange;

correspondingly, the welding process is also adjusted, the original one-step electric welding is changed into two steps of argon arc welding and gas shield welding, the argon arc welding is firstly used for carrying out gas-tight welding, at the moment, a welding wire is not used, the annular branch opening is directly melted, and a self-melting layer 141' formed by melting covers a gap between the flange and the valve body, so that the phenomena of slag inclusion, air holes and cold cracking are avoided; then, the strength welding is performed by using gas shield welding, and at this time, the welding wire is used for strength welding, and the welding wire melting layer 3 'covers the self-melting layer 141' and spreads to cover the flange and the valve body, so that the strength is further ensured.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The self-fluxing flange for the electromagnetic differential pressure valve is characterized in that a transition section is additionally arranged between the radial second face (12) and the oblique third face (13), and the transition section comprises a transition axial face (142) and an annular branch port (141) protruding from a part of the surface of the transition axial face (142) in the radial direction.

2. A self-fluxing flange for differential pressure solenoid valves according to claim 1, wherein the front side of the annular branch (141) is directly contiguous to the second radial face (12).

3. Self-fluxing flange for differential pressure solenoid valves according to claim 1 or 2, wherein the front side of the annular branch (141) is coplanar with the radial second face (12).

4. A self-fluxing flange for electromagnetic differential pressure valves according to claim 1, wherein, when abutting against a valve port, the axial first face (11) abuts against the inner wall face (21) of the valve port, the radial second face (12) abuts against the end face (22) of the valve port, and the annular branch port (141) protrudes from the valve port axial faces (23) on both sides and the transition axial face (142) of the flange.

5. The self-fluxing flange for electromagnetic differential pressure valves according to claim 1 or 4, wherein the transition axial surface (142) is coplanar with the valve port axial surface (23) of the valve port when interfacing with the valve port.

6. A self-fluxing flange for a differential electromagnetic pressure valve according to claim 1, wherein the material of the annular branch is the same as the material of the flange as a whole.

7. The structure of the connection node of the valve port of the electromagnetic differential pressure valve is characterized in that the flange butted with the valve port adopts the self-melting flange for the electromagnetic differential pressure valve according to claim 1.

8. The joint structure of the valve port of the electromagnetic differential pressure valve according to claim 7, wherein the self-melting layer formed by melting the annular branch port covers the gap between the flange and the valve body, and the welding wire melting layer covers the self-melting layer and spreads to cover the flange and the valve body.