CN216447528U

CN216447528U - Hard surface structure of regulating valve mandrel

Info

Publication number: CN216447528U
Application number: CN202122927318.2U
Authority: CN
Inventors: 周辉; 郭勇兵; 欧阳洁; 张凤
Original assignee: Zhuzhou Zhongke Wear Resistant New Material Technology Co ltd
Current assignee: Zhuzhou Zhongke Wear Resistant New Material Technology Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-05-06
Anticipated expiration: 2031-11-26

Abstract

The utility model discloses a hard surface structure of a regulating valve mandrel, which comprises the following components in percentage by weight: a plurality of limiting grooves axially formed are formed in the outer peripheral surface of the abrasion section of the mandrel, and the limiting grooves are circumferentially arranged at equal intervals; the radial distance from the mandrel of the wearing section to the outer surface of the wearing strip block is greater than the diameter of the wearing section. And surfacing grooves are arranged on two sides of the limiting groove, and welding surfacing for welding the wear-resistant bar block and the peripheral surface of the wear segment is arranged in the surfacing grooves. The wear-resistant strip blocks are connected and overlaid in an arc shape, and the first outer surface of each wear-resistant strip block and the second outer surface connected and overlaid form a complete cylindrical outer peripheral surface. The advantages are that: wear-resistant materials are not used among the wear-resistant strips, so that the material cost can be saved by more than 50%; compared with full-coverage surfacing welding on the peripheral surface of the wearing segment, the welding quantity of the structure is reduced by about 80%, and the labor cost of manufacturing and processing is greatly reduced.

Description

Hard surface structure of regulating valve mandrel

Technical Field

The utility model relates to a regulating valve, in particular to a hard surface structure of a regulating valve mandrel, and belongs to the technical field of valves.

Background

The central spindle (or valve shaft) in the regulating valve, which is connected with the valve to drive the valve to realize flow control, has two driving modes of rotation or bidirectional twitch.

The mandrel is arranged in the mounting hole of the valve body of the regulating valve, and the mounting hole plays a role in limiting and guiding the mandrel. Because the mandrel is abraded with the wall of the mounting hole during the rotation or bidirectional drawing process, the part of the mandrel in the mounting hole must be made of hard materials. Because some regulating valves have large specifications, corresponding core shafts have large specifications, and hard materials have relatively high price, the prior art generally adopts surfacing welding on the periphery of common materials and then turning and polishing to solve the problem. Namely: in the abrasion section of the mandrel, hard welding materials are adopted to surround the mandrel to carry out gapless spiral surfacing, and then turning and polishing are carried out. The method has long welding time and large consumption of welding materials, so that the cost is still high.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: how to reduce the abrasion-resistant treatment cost of the abrasion section of the mandrel.

The utility model comprises the following steps:

the utility model provides a hardside structure of governing valve dabber which characterized in that: a plurality of axially-arranged limiting grooves are formed in the outer peripheral surface of the abrasion section of the mandrel, and the plurality of limiting grooves are distributed in the circumferential direction at equal intervals; the radial distance from the axle center of the abrasion section to the outer surface of the abrasion bar block is larger than the diameter of the abrasion section.

Furthermore, the limiting groove is a rectangular groove with a rectangular cross section, and the profile of the base part of the wear-resistant bar block in the limiting groove is matched with the profile of the limiting groove.

Furthermore, surfacing grooves are formed in two sides of the limiting groove, and the wear-resistant bar blocks and the peripheral surface of the wear segment are welded in the surfacing grooves to form surfacing welding.

Furthermore, the first outer surface of the wear-resistant bar block is an arc-shaped surface, and the first outer surfaces of the arc-shaped outer surfaces of all the wear-resistant bar blocks have a common axial lead.

Furthermore, arc-shaped connecting surfacing welding is arranged between the wear-resistant strip blocks, and the first outer surface of the wear-resistant strip block and the second outer surface of the connecting surfacing welding form a complete cylindrical outer peripheral surface.

Further, the wearing segment periphery has 4 wear-resistant bars.

Has the advantages that:

1. wear-resistant materials are not used among the wear-resistant strips, so that the material cost can be saved by more than 50%;

2. compared with full-coverage surfacing welding on the peripheral surface of the wearing segment, the welding quantity of the structure is reduced by about 80%, and the labor cost is greatly reduced.

Drawings

FIG. 1 is a perspective view of the mandrel;

FIG. 2 is a partial perspective view of the mandrel showing primarily the retaining groove;

FIG. 3 is a perspective view of the wear strip;

FIG. 4 is a partial schematic view of FIG. 1 illustrating the wear bar block when not welded;

FIG. 5 is a partial schematic view of FIG. 1, illustrating primarily the structural relationship of the wear strip and the attachment weld overlay.

In the figure: 1. a wearing section; 2. a limiting groove; 3. a wear resistant bar; 31. a first outer surface; 32. a base; 4. overlaying a notch; 5. welding and surfacing; 6. connecting and surfacing; 61. and a second outer surface.

Detailed Description

The utility model is further described with reference to the accompanying drawings in which:

as shown in fig. 1, 2, 3 and 5, a hard surface structure of a regulating valve mandrel is characterized in that a plurality of axially-arranged limiting grooves 2 are arranged on the outer peripheral surface of a wearing section 1 of the mandrel, and the plurality of limiting grooves 2 are distributed in the circumferential direction at equal intervals (equal arc length); the radial distance from the axle center of the abrasion section 1 to the first 31 of the outer surface of the abrasion bar block 3 is larger than the diameter of the abrasion section 1. The wear-resistant bars are generally made of powder metallurgy materials. Thus, after the mandrel made of common metal materials is arranged, the abrasion section 1 in the mounting hole on the valve body of the regulating valve is the abrasion resistant strip block 3 which is in contact with the inner wall in the mounting hole, and can endure long-term repeated rotation or twitching abrasion. Compared with the prior art of adopting the surfacing welding technology at the periphery of the wearing segment 1, a large amount of wear-resistant materials and operation time can be saved.

The limiting groove 2 is a rectangular groove with a rectangular cross section, and the shape surface of the base 32 of the wear-resistant strip block 3 in the limiting groove 2 is matched with the shape surface of the limiting groove 2. By the arrangement, the wear-resistant bar block 3 is convenient to attach to the groove bottom of the limiting groove 2.

As shown in fig. 2 and 4, the wear-resistant bar 3 may be fixed in the limiting groove 2 by interference fit. Preferably, however, the present solution employs a welding fixing method. In order to facilitate welding and guarantee the welding effect, surfacing grooves 4 are formed in two sides of the limiting groove 2, welding is carried out in the surfacing grooves 4, and the wear-resistant bar blocks 3 and the peripheral surface of the wear segment 1 are welded in the surfacing grooves 4 to form a welding surfacing 5.

As shown in fig. 3-5, the first outer surfaces 31 of the wear bars 3 are arc-shaped surfaces, and the first outer surfaces 31 of the wear bars 3 have a common axis.

The wear-resistant strip blocks 3 are provided with arc-shaped connecting overlaying 6, and the first outer surface 31 of the wear-resistant strip block 3 and the second outer surface 61 of the connecting overlaying 6 form a complete cylindrical outer peripheral surface. The purpose of this is to avoid grooves between the wear bars 3, so that the wear segments can also be sealed in the mounting holes.

Because the welding temperature rise can lead to the wear-resistant strip block 3 to deform and the surfacing part is uniform during welding, proper turning and grinding are still needed after the welding and fixing are finished.

The peripheral surface of the wearing segment 1 is provided with 4 wear-resistant strip blocks 3, so that the mandrel has a more reasonable stress structure.

The above-described embodiments are intended to illustrate the utility model more clearly and should not be construed as limiting the scope of the utility model covered thereby, any modification of the equivalent should be considered as falling within the scope of the utility model covered thereby.

Claims

1. The utility model provides a hardside structure of governing valve dabber which characterized in that: a plurality of axially-arranged limiting grooves (2) are formed in the outer peripheral surface of the abrasion section (1) of the mandrel, and the limiting grooves (2) are circumferentially arranged at equal intervals; the radial distance from the axis of the wearing section (1) to the first outer surface (31) of the wearing strip block (3) is greater than the diameter of the wearing section (1).

2. The hard-face structure of a regulating valve spindle according to claim 1, characterized in that: the limiting groove (2) is a rectangular groove with a rectangular cross section, and the shape surface of the base (32) of the wear-resistant strip block (3) in the limiting groove (2) is matched with the shape surface of the limiting groove (2).

3. The hard-face structure of a regulating valve spindle according to claim 1, characterized in that: two sides of the limiting groove (2) are provided with surfacing notches (4), and the wear-resistant strip block (3) and the peripheral surface of the wear segment (1) are welded in the surfacing notches (4) to form a surfacing welding (5).

4. The hard-face structure of a regulating valve spindle according to claim 1, characterized in that: the outer surfaces (31) of the wear-resistant strip blocks (3) are arc-shaped surfaces, and the outer surfaces (31) of the arc-shaped outer surfaces of all the wear-resistant strip blocks (3) have a common axial lead.

5. The hard-face structure of a regulating valve spindle according to claim 4, characterized in that: arc-shaped connecting surfacing welding (6) are arranged between the wear-resistant strip blocks (3), and a complete cylindrical peripheral surface is formed by the first outer surface (31) of the wear-resistant strip blocks (3) and the second outer surface (61) of the connecting surfacing welding (6).

6. The hard-face structure of a regulating valve spindle according to claim 1, characterized in that: the peripheral surface of the wearing segment (1) is provided with 4 wear-resistant bar blocks (3).