CN217785999U

CN217785999U - Point location distance measuring gauge of internal reducing guide pipe for nuclear

Info

Publication number: CN217785999U
Application number: CN202222209201.5U
Authority: CN
Inventors: 王旭峰; 薛祥义; 唐斌; 李金山; 寇宏超; 王军
Original assignee: Northwestern Polytechnical University
Current assignee: Northwestern Polytechnical University
Priority date: 2022-08-22
Filing date: 2022-08-22
Publication date: 2022-11-11
Anticipated expiration: 2032-08-22

Abstract

The utility model discloses a nuclear point location distance measuring gauge with interior reducing stand pipe, including gauge head and measuring staff, the gauge head external diameter is not less than the measuring staff, the gauge head top is fallen annular portion, and this annular portion is unanimous with the design angle of stand pipe reducing transition zone. The utility model discloses a gauge head with stand pipe reducing transition district adaptation allows the gauge head front end to arrive at the reducing transition district completely, according to the distance of measuring staff record transition district and pipe end, judge promptly in the tolerance range and judge qualifiedly, need not to destroy the finished product and detect, detect and realize covering comprehensively, accurate measurement accuracy is high, install the range finding scale additional on the measuring staff, need not to use extra measuring tool, and measurement accuracy is higher, the gauge head is connected with dismantling of measuring staff, the not unidimensional stand pipe of adaptation, the improvement suitability.

Description

Point-to-point distance measuring gauge of internal reducing guide pipe for nuclear

Technical Field

The utility model relates to a nuclear with stand pipe detection technical field, concretely relates to nuclear point location gauge gage with interior reducing stand pipe.

Background

The zirconium alloy is used as an important strategic material and widely applied to the reactor core material of a water-cooled power reactor, and the zirconium alloy guide tube is used as an important component part in a nuclear reactor fuel assembly, has the framework support function and provides the guide, deceleration and buffer functions for a control rod. Therefore, the geometric accuracy of the guide tube plays an important role in the safety and reliability of the reactor.

Common nuclear fuel assembly guide tubes are roughly divided into two types in structural form: one is that the wall thickness is not changed, the inner diameter and the outer diameter are changed in a step shape at the same time, such as a guide tube for AFA2G components; the other is that the outside diameter is kept constant while the inside diameter is changed, such as a Monobloc TM guide tube for AFA3G assembly. The guide pipe with the constant outer diameter and the variable inner diameter needs to accurately measure the point position of a reducing transition area in the pipe in the preparation process, but the conventional common three-coordinate measuring instrument and other equipment cannot accurately measure the transition area on line, generally can only measure the transition area in a destructive sampling inspection mode, and the destructive sampling inspection has the problems of low measurement precision and poor detection effect, cannot comprehensively cover all finished products, and has potential safety hazards.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a nuclear point location gauge gage with interior reducing stand pipe, this distance gage have solved the problem that destructive selective examination coverage is little, the precision is low among the prior art.

In order to achieve the purpose, the utility model adopts the technical proposal that: a point location distance measuring gauge of an inner diameter-changing guide tube for a nuclear power station comprises a measuring head and a measuring rod, wherein the outer diameter of the measuring head is not smaller than that of the measuring rod, an annular part is inverted at the top end of the measuring head, and the angle of the annular part is consistent with that of a diameter-changing transition area of the guide tube.

Furthermore, the outer diameter of the measuring head is 0.005-0.01mm smaller than the maximum inner diameter of the reducing transition area of the guide pipe.

Furthermore, the surface roughness of the measuring head is less than or equal to 0.05 mu m.

Furthermore, the measuring head is detachably connected with the measuring rod.

Further, the measuring head is in threaded connection with the measuring rod.

Further, the measuring rod comprises a measuring part and a handheld part, and anti-skid grains are arranged on the handheld part.

Furthermore, a distance measuring scale is arranged on the measuring part along the axial direction of the measuring part.

Furthermore, the measuring head and the measuring rod are a tool steel/bearing steel measuring head and a tool steel/bearing steel measuring rod.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:

1. the utility model relates to a nuclear point location distance measuring gauge with interior reducing stand pipe, the gauge head through with stand pipe reducing transition district adaptation allows the gauge head front end to arrive the reducing transition district completely, according to the distance of measuring staff record transition district and pipe end, judges promptly in the tolerance range as qualified, need not to destroy the finished product and detects, detects and realizes covering comprehensively, and the precision measurement precision is high.

2. The utility model relates to a nuclear point location range finder who uses interior reducing stand pipe installs the range finding scale additional on the gage rod, need not to use extra measuring tool, and measurement accuracy is higher.

3. The utility model relates to a nuclear point location distance measuring gauge with interior reducing stand pipe, gauge head and the dismantlement of gauge rod are connected, and the not unidimensional stand pipe of adaptation improves the suitability.

Drawings

Figure 1 is the utility model discloses a point location distance measuring gauge's of reducing stand pipe in nuclear usefulness overall structure schematic diagram.

In the drawings above: 1. a measuring head; 11. an annular portion; 2. a measuring bar; 21. a measuring section; 22. a hand-held portion; 23. a distance measuring scale.

Detailed Description

In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; 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 meaning of the above terms in this patent may be understood in a concrete sense to those of ordinary skill in the art.

Example 1: the point location distance measuring gauge of the nuclear internal reducing guide pipe comprises a measuring head 1 and a measuring rod 2, wherein the outer diameter of the measuring head 1 is not smaller than that of the measuring rod 2, an annular part 11 is inverted at the top end of the measuring head 1, and the angle of the annular part 11 is consistent with that of a reducing transition area of the guide pipe.

The measuring rod 2 comprises a measuring part 21 and a handheld part 22, and anti-skid lines are arranged on the handheld part 22; a distance measuring scale 23 is arranged on the measuring part 21 along the axial direction thereof.

The outer diameter of the measuring head 1 is 0.005-0.01mm smaller than the maximum inner diameter of the reducing transition area of the guide pipe; the surface roughness of the measuring head is less than or equal to 0.05 mu m.

The measuring head 1 and the measuring rod 2 are a tool steel/bearing steel measuring head 1 and a tool steel/bearing steel measuring rod 2.

Example 2: the utility model provides a point location gauge of reducing stand pipe in nuclear, refers to attached 1, includes gauge head 1 and measuring staff 2, 1 external diameter of gauge head is not less than measuring staff 2, 1 top of gauge head is fallen annular portion 11, and this annular portion 11 is unanimous with the angle of stand pipe reducing transition zone.

The measuring head 1 is detachably connected with the measuring rod 2, and the detachable connection is a threaded connection.

The working principle is as follows: preparing a corresponding gauge before measurement, selecting a matched measuring head according to the angle and the inner diameter of the reducing transition region in the guide pipe to be detected, and connecting the measuring head with a measuring rod through threads; during measurement, the measuring head is stretched into the inner diameter-variable guide pipe to be detected through the handle part until the front end of the measuring head completely reaches the diameter-variable transition region, at the moment, the distance between the transition region and the pipe end is read through the distance measuring scale on the measuring rod, the condition that the measuring head is qualified within the allowable tolerance range of a drawing is judged, and the condition that the measuring head is unqualified is judged outside the allowable tolerance range of the drawing.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.

Claims

1. The utility model provides a point location gauge of reducing stand pipe in nuclear, its characterized in that: the measuring head comprises a measuring head (1) and a measuring rod (2), wherein the outer diameter of the measuring head (1) is not smaller than the measuring rod (2), an annular part (11) is inverted at the top end of the measuring head (1), and the annular part (11) is consistent with the design angle of a reducing transition area of a guide pipe.

2. The point-to-point distance measuring gauge of the nuclear inner diameter-variable guide pipe as claimed in claim 1, wherein: the outer diameter of the measuring head (1) is 0.005-0.01mm smaller than the maximum inner diameter of the reducing transition area of the guide pipe.

3. The point-to-point distance measuring gauge of the nuclear inner diameter-variable guide pipe as claimed in claim 1, wherein: the surface roughness of the measuring head is less than or equal to 0.05 mu m.

4. The point-to-point distance measuring gauge of the nuclear inner diameter-variable guide pipe as claimed in claim 1, wherein: the measuring head (1) is detachably connected with the measuring rod (2).

5. The point-to-point distance measuring gauge of the nuclear inner diameter-variable guide pipe as claimed in claim 4, wherein: the measuring head (1) is in threaded connection with the measuring rod (2).

6. The point-to-point distance measuring gauge of the nuclear inner diameter-variable guide pipe as claimed in claim 1, wherein: the measuring rod (2) comprises a measuring part (21) and a handheld part (22), and anti-skid lines are arranged on the handheld part (22).

7. The point-to-point distance measuring gauge of the nuclear inner diameter-variable guide pipe as claimed in claim 6, wherein: the measuring part (21) is provided with a distance measuring scale (23) along the axial direction.

8. The point-to-point distance measuring gauge of the nuclear inner diameter-variable guide pipe as claimed in claim 1, wherein: the measuring head (1) and the measuring rod (2) are a tool steel/bearing steel measuring head (1) and a tool steel/bearing steel measuring rod (2).