CN214671842U - Thin wall protective sleeve shell - Google Patents

Abstract

The utility model discloses a thin wall protective sheath casing, thin wall protective sheath casing includes thin wall cover shell, thin wall boss, shell seat and holding ring, through to a plurality of parts finish machining back, adopts the method concatenation of welding process the thin wall protective sheath casing reduces manufacturing cost, the processing degree of difficulty, promotes manufacturing efficiency and product precision, and the product precision has reached mirror surface level requirement, provides the guarantee for the high-efficient production of thin wall protective sheath shell, has increased its stability of quality.

Description

Thin wall protective sleeve shell

Technical Field

The utility model belongs to the technical field of nuclear power equipment's machining, concretely relates to thin wall protective sheath casing.

Background

The thin-wall protective casing is one of important parts forming a control rod driving mechanism position indicator component, is a component for maintaining the integrity of a pressure-bearing boundary of a reactor coolant system, and is a nuclear-grade part formed by various low-magnetism weak-magnetism material parts. The main body of the lifting lug is characterized by slender thin walls, thin-wall bosses and the like, the total length exceeds 1300mm, the ratio of the outer diameter to the wall thickness exceeds 25, the length-diameter ratio exceeds 10, lifting lugs are arranged on the outer circle of the lifting lug, the coaxiality of the inner circle and the outer circle is only 0.02mm, the outer surface of the lifting lug needs to reach mirror finish below Ra 0.2, and the technical requirement of assembling positioning surfaces at positions close to two ends is high.

At present, regarding the processing technology of a slender thin-wall part, the surface precision can not reach the mirror surface level requirement, the integrated molding of various grades of weak magnetic materials can not be solved, the nuclear level technical requirement of the slender thin-wall part is not involved and can not be met, and the precision processing technology that the outer surface of the slender thin-wall part is provided with a plurality of thin-wall bosses and multi-matching surface characteristics can not be solved, so that the nuclear level product manufacturing of the slender thin wall, the plurality of thin-wall bosses, the multi-matching surface and other key characteristics of the thin-wall protective sleeve shell of the mirror surface level weak magnetic material can not be met.

SUMMERY OF THE UTILITY MODEL

To exist not enough among the prior art, the utility model provides a thin wall protective sheath casing, thin wall protective sheath casing includes a plurality of parts, through to a plurality of parts finish machining back, adopts the method concatenation of welding process concatenation thin wall protective sheath casing reduces manufacturing cost, the processing degree of difficulty, has promoted manufacturing efficiency and product precision, provides the guarantee for the high-efficient production of thin wall protective sheath casing, has increased its stability in quality.

In order to realize the above purpose of the utility model, the utility model adopts the following technical scheme:

the utility model provides a thin wall protective sheath casing, include: the thin-wall shell comprises a thin-wall shell body, a thin-wall boss, a shell seat and a positioning ring, wherein the thin-wall boss is fixed to the outer peripheral surface of the thin-wall shell body, the shell seat is fixed to one end of the thin-wall shell body, and the positioning ring is fixed to the other end of the thin-wall shell body.

In one embodiment, the thin-walled boss comprises: the side plate is fixedly connected with the upper plate and the lower plate.

In one embodiment, the thin-walled protective sheath housing further comprises a positioning pin disposed on the housing seat.

In one embodiment, the thin-walled protective casing further comprises at least one lifting lug fixed to the outer circumferential surface of the thin-walled casing.

In one embodiment, the thin-walled casing has a through hole in its outer periphery, and the lifting lug is fixedly welded in the through hole.

In one embodiment, the thin-walled protective casing comprises a pair of lifting lugs, and the lifting lugs are symmetrically arranged on the outer peripheral surface of the thin-walled casing.

In one embodiment, the material of the thin-wall protective sleeve shell is a low-magnetism weak-magnetism material.

The utility model has the advantages that: the utility model provides a thin wall protective sheath casing, thin wall protective sheath casing includes thin wall cover shell, thin wall boss, shell seat, holding ring and lug, through to a plurality of parts finish machining after, adopts the method concatenation of welding process thin wall protective sheath casing reduces manufacturing cost, the processing degree of difficulty, promotes manufacturing efficiency and product precision, for the high-efficient production of thin wall protective sheath shell provides the guarantee, has increased its stability of quality, the utility model discloses the protective sheath shell processing degree of difficulty of concatenation manufacturing is little, the precision is high, and the product precision has reached mirror surface level requirement, and product property can be good.

Drawings

In order to more clearly illustrate the features of particular embodiments of the present invention, reference will now be made briefly to the accompanying drawings of embodiments. It is obvious that the drawings described below are only some embodiments of the invention, and that other similar pictures can be obtained from these drawings without inventive effort for a person of ordinary skill or practice in the art.

Fig. 1 is a schematic structural view of a thin-walled protective sheath according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;

fig. 3 is a schematic view illustrating a thin-wall boss structure of a thin-wall protective sheath casing according to an embodiment of the present invention;

fig. 4 is a schematic view illustrating a thin-wall protective sheath welded according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As shown in fig. 1, fig. 2 and fig. 3, the present embodiment provides a thin-walled protective sheath housing 100, including: thin-walled casing 1, thin-walled boss 2, shell seat 3 and holding ring 4. The thin-wall boss 2 is fixed to the outer peripheral surface of the thin-wall casing 1, the shell base 3 is fixed to one end of the thin-wall casing 1, and the positioning ring 4 is fixed to the other end of the thin-wall casing 1.

In the present embodiment, the thin-walled boss 2 includes: the structure comprises an upper plate 21, a side plate 22 and a lower plate 23, wherein the side plate 22 is fixedly connected with the upper plate 21 and the lower plate 23.

In this embodiment, the thin-walled protective sheath housing 100 further includes a positioning pin 6, and the positioning pin 6 is disposed on the housing base 3.

In this embodiment, the thin-walled protective sheath housing 100 further comprises at least one lifting lug 5, and the lifting lug 5 is fixed to the outer circumferential surface of the thin-walled casing 1.

In this embodiment, the thin-walled casing 1 has a through hole 10 on its outer periphery, and the lifting lug 5 is fixedly welded in the through hole 10.

In this embodiment, the thin-walled protective sheath housing 100 includes a pair of lifting lugs 5, and the lifting lugs 5 are symmetrically disposed on the outer peripheral surface of the thin-walled casing 1.

In this embodiment, the material of the thin-walled protective sheath housing 100 is a low-magnetic flux-weakening material.

As shown in fig. 4, the present invention further provides a method for manufacturing the thin-walled protective sheath housing 100, wherein the thin-walled protective sheath housing 100 comprises: the thin-wall shell comprises a thin-wall shell 1, a thin-wall boss 2, a shell seat 3 and a positioning ring 4, wherein the thin-wall boss 2 is fixed to the outer peripheral surface of the thin-wall shell 1, the shell seat 3 is fixed to one end of the thin-wall shell 1, and the positioning ring 4 is fixed to the other end of the thin-wall shell 1; the manufacturing method of the thin-wall protective sleeve shell 100 comprises the following steps:

providing the thin-walled casing 1;

providing the thin-walled boss 2;

providing said housing seat 3;

providing said positioning ring 4;

welding the thin-wall boss 2 to the outer peripheral surface of the thin-wall casing 1, welding the shell base 3 to one end of the thin-wall casing 1, and welding the positioning ring 4 to the other end of the thin-wall casing 1.

As shown in fig. 3, in the step of providing the thin-walled boss 2, the thin-walled boss 2 includes an upper plate 21, a side plate 22 and a lower plate 23, wherein the side plate 22 is fixedly connected to the upper plate 21 and the lower plate 23 by welding.

As shown in fig. 2 and fig. 4, in the present embodiment, the method for manufacturing a thin-walled protective sheath housing 100 further includes,

providing at least one lifting lug 5;

providing at least one locating pin 6;

machining a through hole 10 in the thin-walled casing 1;

processing a positioning hole 31 on the shell seat 3;

the lifting lug 5 is welded and fixed to the through hole 10 of the thin-walled casing 1, and the positioning pin 6 is welded to the positioning hole 31 of the shell base 3.

In this embodiment, the thin-walled protective sheath casing 100 is formed by splicing a plurality of low-magnetic flux-weakening material parts, and is characterized in that a thin-walled boss 2 is attached to the outer side of a thin-walled cylinder, which relates to a plurality of assembling surfaces and high dimensional and form and position precision, and further provides a more detailed manufacturing process for some components.

Further providing a more detailed manufacturing process of some components includes the steps of:

wherein, the processing step of the thin-wall shell 1 is provided, comprising:

(1-1) roughly and finely machining the excircle of the thin-wall casing 1 with allowance in the length direction;

(1-2) polishing the outer circle of the thin-wall casing 1 to obtain a bright and flat surface;

(1-3) turning the deep hole, the total length and two end welding grooves of the thin-wall casing 1, and reserving grinding allowance in the deep hole;

(1-4) milling a structural connection window of the thin-wall boss 2 on the excircle of the thin-wall casing 1;

(1-5) drilling the installation through hole 10 of the lifting lug 5 on the excircle of the thin-wall casing 1.

Wherein, a processing step of the housing base 3 is provided, comprising:

(2-1) roughly machining the outer circle of the shell seat 3 by using a weak magnetic material rod with machining allowance, finely machining an inner hole, and keeping grinding allowance in the inner hole;

(2-2) turning the outer circle of the groove together with the thin-wall casing 1;

and (2-3) finishing the shape of the shell seat 3 by taking the matched turning excircle as a reference.

Wherein, the processing step of the positioning ring 4 is provided, which comprises:

(3-1) roughly machining the appearance of the shell seat 3 by using a weak magnetic material bar with a machining allowance;

(3-2) turning the outer circle of the groove together with the thin-wall casing 1;

and (3-3) finishing the shape of the shell seat 3 by taking the matched turning excircle as a reference.

Wherein, a processing step of the side plate 22 is provided, comprising:

(6-1) punching an unfolded shape according to the unfolded drawing of the side plate 22 by using a plate material with proper thickness;

(6-2) roll-bending the punched plate into the side plate 22 by using a roll-bending forming technology;

wherein, the processing step of the thin-wall boss 2 is provided, which comprises the following steps:

(9-1) clamping the upper plate 21, the side plate 22 and the lower plate 23 by using a special welding fixture to form the thin-wall boss 2;

(9-2) overlaying a transition layer at the position of the welding seam (not shown) by an automatic welding robot by adopting an overlaying process.

The processing and assembling steps of the thin-wall protective sleeve shell 100 are provided, and include:

(10-1) clamping the thin-wall casing 1, the positioning ring 4, the shell seat 3, the lifting lug 5 and the thin-wall boss 2 by using a special welding fixture;

(10-2) overlaying a transition layer at the position of the welding seam by using an automatic welding robot through an overlaying process (as shown in figure 4, the welding seams are 11, 12, 13, 14, 15 and 16).

In this embodiment, the thin-walled protective sleeve housing 100 made of mirror-surface-level weak magnetic material has higher requirements, wherein in the step (1-1), the thin-walled sleeve housing 1 is formed by performing finish machining on the outer circle to phi 140mm by using a tube made of weak magnetic material with machining allowance left on the inner circle and the outer circle.

And in the step (1-3), the coaxiality of the outer circle of the turning groove and the outer circle of the thin-wall casing 1 needs to be controlled within +/-0.02 mm.

And (3) turning the outer circle of the groove of the shell seat 3 together with the thin-wall casing 1 in the step (2-2), and controlling the coaxiality of the outer circle of the groove of the shell seat 3 and the outer circle of the thin-wall casing 1 to be +/-0.02 mm.

And (3) turning the groove excircle of the positioning ring 4 together with the thin-wall casing 1 in the step (3-2), and controlling the coaxiality of the groove excircle of the positioning ring 4 and the excircle of the thin-wall casing 1 to be +/-0.02 mm.

In the step (7), the lifting lugs 5 are processed by using weak magnetic material rods with twice length, and in order to improve efficiency, the lifting lugs are bent firstly, then cut into two lifting lugs 5, and then shaped and the like.

And (3) in the step (11), deep hole grinding is carried out by taking the thin-wall outer circle as a reference.

The utility model provides a pair of thin wall protective sheath casing, thin wall protective sheath casing includes thin wall cover shell, thin wall boss, shell seat and holding ring, wherein the thin wall boss is fixed extremely on the outer peripheral face of thin wall cover shell, the shell seat fixed extremely the one end of thin wall cover shell, the holding ring is fixed extremely the other end of thin wall cover shell. The utility model also provides a manufacturing approach of thin wall protective sheath casing, manufacturing approach is used for thin wall protective sheath casing part at the processing of complicated manufacturing operating mode, through to a plurality of parts finish machining back, adopts the method concatenation of welding process concatenation thin wall protective sheath casing reduces the manufacturing cost, the processing degree of difficulty, promotes manufacturing efficiency and product precision, provides the guarantee for the high-efficient production of thin wall protective sheath casing, has increased its stability of quality, the utility model discloses the thin wall protective sheath casing processing degree of difficulty of concatenation manufacturing is little, the precision is high, and the product precision has reached mirror surface level requirement, and product property can be good.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (7)

1. A thin-walled protective casing comprising: the thin-wall shell comprises a thin-wall shell body, a thin-wall boss, a shell seat and a positioning ring, wherein the thin-wall boss is fixed to the outer peripheral surface of the thin-wall shell body, the shell seat is fixed to one end of the thin-wall shell body, and the positioning ring is fixed to the other end of the thin-wall shell body.

2. The thin-walled protective casing of claim 1, wherein the thin-walled boss comprises: the side plate is fixedly connected with the upper plate and the lower plate.

3. The thin-walled protective sheath housing of claim 1, further comprising a locating pin disposed on the housing seat.

4. The thin-walled protective casing of claim 1, further comprising at least one lifting lug secured to an outer peripheral surface of the thin-walled casing.

5. The thin-walled protective casing of claim 4, wherein the thin-walled casing has a through hole in its outer periphery, and the lifting lug is fixedly welded to the through hole.

6. The thin-walled protective sheath housing of claim 1, comprising a pair of lifting lugs symmetrically disposed on an outer circumferential surface of the thin-walled casing.

7. The thin-walled protective sheath housing of claim 1, wherein the material of the thin-walled protective sheath housing is a low magnetic flux weakening material.

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