CN202195788U

CN202195788U - Positioner for measuring internal diameter of large diameter steel pipe

Info

Publication number: CN202195788U
Application number: CN2011202966795U
Authority: CN
Inventors: 王海涛; 张伟卫; 吉玲康; 黄呈帅; 李鹤; 陈宏远; 熊庆人; 齐丽华
Original assignee: China National Petroleum Corp; CNPC Tubular Goods Research Institute
Current assignee: China National Petroleum Corp; CNPC Tubular Goods Research Institute
Priority date: 2011-08-15
Filing date: 2011-08-15
Publication date: 2012-04-18
Anticipated expiration: 2021-08-15

Abstract

The utility model relates to the technology field of a measure tool, and specially relates to a positioner for measuring the internal diameter of a large diameter steel pipe. The positioner includes a first middle plumbing arm, a second middle plumbing arm and an internal diameter pipe. The first middle plumbing arm and the second middle plumbing arm are vertically connected mutually in the same plane and bisect each other; the internal diameter pipe is connected to the connection position of the first middle plumbing arm and the second middle plumbing arm, and is vertical to the first middle plumbing arm and the second middle plumbing arm; the end portions of the first middle plumbing arm and the second middle plumbing arm are respectively provided with a spherical surface contact. In the utility model, the positioner for measuring the internal diameter of a large diameter steel pipe is used coupling to a common applied internal diameter micrometer, high measure precision is guaranteed, four spherical surface contacts of the middle plumbing arms are fully contacted to the inner wall of a steel pipe to realize positioning, determination is easy for the operation personnel, operation is simple, positioning is accurate, cylindrical extension rods of different lengths can be connected by the middle plumbing arms through threads, a suitable pipe diameter measure scope is enlarged, and the internal diameter positioning in measuring a steel pipe with a large diameter is enhanced.

Description

A kind of locating device of measuring the large-diameter steel bore

Technical field

The utility model relates to the measuring appliance technical field, is specifically related to a kind of locating device of measuring the large-diameter steel bore.

Background technology

In recent years; The oil and gas pipeline conveying technology develops rapidly towards the direction of high-pressure large-caliber; The design maximum nominal diameter of present domestic pipe-line has reached 1422mm, in other device fabrication and engineering construction, all can relate to simultaneously the tubular structure of many heavy calibers (internal diameter is greater than 1000mm).At the manufacturing enterprise or the engineering site of large-diameter steel pipe, tubular structure, all need carry out measurement quick, accurate, simple to operation to internal diameter.

At present, large-diameter steel pipe manufacturing enterprise and pipeline laying construction scene generally adopt micrometer inside caliper (bar gauge) to measure pipe diameter.Micrometer inside caliper is a kind of shaft-like measurement mechanism, and an end of measuring staff is equipped with the differential head, and measuring accuracy is higher, and resolution reaches 0.01mm.When utilizing micrometer inside caliper to measure pipe diameter; The measuring staff two ends contact with the steel pipe inwall; Can read the measured value of internal diameter through the differential head of an end wherein, the light portable of its measuring equipment, the simple advantage of measuring method are applicable to that relatively the on-the-spot pipe diameter of production and construction detects.But; Measuring with micrometer inside caliper in the specific operation process of certain position internal diameter of steel pipe; At first need to adjustment measuring staff position it be in the cross section with the steel pipe axis normal (position that corresponding measuring staff measured value is minimum), need circumferentially adjust the measuring staff position at steel pipe then and make it be in the diametric(al) (position that corresponding measuring staff measured value is maximum) in this cross section at steel shaft.Micrometer inside caliper adopts simple rod-like structure to make it when measuring, need to place repeatedly artificially; The adjustment measuring staff is to seek this place perpendicular to the internal diameter direction in the steel pipe axis cross section; Not only waste time and energy; And being difficult to be placed into more accurate inner diameter location, measurement result receives artificial factor bigger.

(Granted publication number: CN 2705773Y) relate to a kind of inner diameter measuring device in disclosed patent; Place kick and reference column through steady arm both sides, measuring staff below guarantee that measuring staff is positioned at the inner diameter location on the steel pipe axis vertical cross-section; But there is following significant disadvantages in it: the reference column of (1) this measurement mechanism is perpendicular to the plane of steady arm and measuring staff, and fully contacting the plane that guarantees steady arm and measuring staff through reference column and steel pipe inner wall surface is the vertical cross-section of steel pipe axis.Reference column is that line contacts with steel pipe internal-surface; Judge whether abundant ground wire contacts the function definition with reality to reference column with steel pipe internal-surface; Especially to large-diameter steel pipe, the radian of its inwall is very little, and the reference column that reference column is observed visually when tilting in the larger context all fully contacts with the steel pipe inwall; Bring very big difficulty for operating personnel's judgement, also can produce very big measuring error; (2) present, the diameter of steel tube of practical application changes in very wide scope, and the steady arm length of this measurement mechanism is certain, and the scope of application is narrower; (3) adopt between the survey ball of the measuring staff of this measurement mechanism and below and be slidingly connected, all adopt sleeve to be connected between measuring staff and steady arm and the meter, increased the measuring error of system.

Summary of the invention

The purpose of the utility model is to provide a kind of locating device when measuring the large-diameter steel bore, can confirm quickly and accurately that certain position of steel pipe is perpendicular to the internal diameter direction on the axis cross section.

In order to achieve the above object, the technical scheme of the utility model employing is:

A kind of locating device of measuring the large-diameter steel bore; Comprise plumbing arm and internal diameter tube in the plumbing arm in first, second; In said first in the plumbing arm and said second plumbing arm in same plane, intersect vertically and be fixedly connected; And divide equally mutually, in the said internal diameter tube and said first in the plumbing arm and said second the plumbing arm intersection be connected, and with said first in the plumbing arm and said second plumbing arm vertical; In said first in the plumbing arm and said second end of plumbing arm be respectively equipped with the sphere contact.

In the such scheme, be respectively equipped with the column extension bar on the plumbing arm in the plumbing arm and said second in said first.

In the such scheme, in the said column extension bar and said first in the plumbing arm and said second plumbing arm through being threaded.

In the such scheme, in the said internal diameter tube and said first in the plumbing arm and said second plumbing arm be connected through bearing respectively.

Compare with the prior art scheme, the beneficial effect that the technical scheme that the utility model adopts produces is following:

The supporting use of the micrometer inside caliper of the utility model and widespread usage can be brought into play the advantage of micrometer inside caliper, guarantees higher measuring accuracy; Four of plumbing arm sphere contacts are fully put to contact with the steel pipe inwall and realized that location, operating personnel are easy to judge in the utility model utilization, and are simple to operate, accurate positioning; The middle plumbing arm of the utility model can make its Calibration expanded range that is suitable for through the column extension bar of the different length that is threaded, the internal diameter location when helping measuring large-diameter steel pipe.

Description of drawings

The structural representation of the locating device that Fig. 1 provides for the utility model embodiment;

The structural representation of the locating device that Fig. 2 provides for another embodiment of the utility model;

Fig. 3 is the vertical view of Fig. 2;

Fig. 4 is the positioning principle and enforcement synoptic diagram of the utility model.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model technical scheme is described in detail.

As shown in Figure 1, the utility model embodiment provides a kind of locating device of measuring the large-diameter steel bore, comprises in first plumbing arm 2 and internal diameter tube 3 in the plumbing arm 1, second.In first in the plumbing arm 1 and second plumbing arm 2 in same plane, intersect vertically and be fixedly connected, and divide equally mutually, two middle plumbing arms can adopt welding or other methods of attachment.In first in the plumbing arm 1 and second four of plumbing arm 2 ends be respectively equipped with the sphere contact 6 of smooth abrasion-proof, realize that with the steel pipe inwall point contacts.In the internal diameter tube 3 and first in the plumbing arm 1 and second plumbing arm 2 intersections be connected; And with first in the plumbing arm 1 and second plumbing arm 2 vertical; Particularly; In the internal diameter tube 3 and first in the plumbing arm 1 and second plumbing arm 2 be connected through bearing 4 respectively, make win in the plumbing arm 1 and second plumbing arm 2 can rotate freely around internal diameter tube 3.In first in the plumbing arm 1 and second between plumbing arm 2 and the bearing 4, and all adopt interference fit between bearing 4 and the internal diameter tube 3.Internal diameter tube 3 is a tubular structure, and the external diameter of aperture and micrometer inside caliper is complementary, and after the utility model locating device is accomplished micrometer inside caliper is inserted internal diameter tube 3 and measures.

As shown in Figures 2 and 3, the locating device of the measurement large-diameter steel bore that another embodiment of the utility model provides except comprising said structure, also is respectively equipped with column extension bar 5 on the plumbing arm 2 in the plumbing arm 1 and second in first.Under guaranteeing the prerequisite that plumbing arm 2 is divided equally mutually in the plumbing arm 1 and second in first; Two middle plumbing arms can be through selecting the column extension bar 5 of suitable length for use; Be connected with plumbing arm 2 in the plumbing arm 1 and second in screw thread 7 ways of connecting and first; Thereby change in first the length of plumbing arm 2 in the plumbing arm 1 and second, make the utility model be applicable to the steel pipe that caliber varies in size.

Fig. 4 be the utility model positioning principle with implement synoptic diagram, in Fig. 4, AD and BC be two orthogonal divide equally first in plumbing arm in the plumbing arm and second, they intersect at the O point in same plane; A, B, C, D are four sphere contacts; OE is the internal diameter tube perpendicular to the ABCD plane; In the internal diameter tube and first in the plumbing arm and second bearing of plumbing arm through the O place interconnect.

As shown in Figure 4, when needs were measured the internal diameter of certain position of steel pipe, two middle plumbing arm AD of rotation the utility model made four sphere contact A, B, C, D closely contact with the steel pipe inwall with BC.Because AO=DO=BO=CO and in same plane, so AC and BD are respectively two buses on the steel pipe inwall; The straight line and the AC that do perpendicular to AC through the O point intersect at a G, and reverse extending OG and BD intersect at a F, then OF=OG; Because internal diameter tube OE is perpendicular to the ABCD plane, thus AC perpendicular to OE and AC perpendicular to OG, the plane that steel pipe inwall bus AC confirms perpendicular to E, O, G, plane EFG locates the cross section perpendicular to the steel pipe axis for this; On the EFG of plane, internal diameter tube OE is perpendicular to FG and OF=OG, so internal diameter tube OE is the diameter of circle EFG in the cross section.In sum, as long as four sphere contact A, B, C, D closely contact with the steel pipe inwall, internal diameter tube OE promptly points to the internal diameter direction of this place's steel pipe, and is simple to operate, accurate positioning.

In the practical implementation process of the utility model, at first according to measure steel pipe diameter select the column extension bar of different length for use, and be connected, but must guarantee that two middle plumbing arms divide equally mutually through plumbing arm in the plumbing arm and second in the screw thread and first; Rotate two middle plumbing arms four sphere contacts are closely contacted with the steel pipe inwall, the some contact realizes easily and operating personnel are easy to judge.At this moment, internal diameter tube promptly accurately is positioned the internal diameter direction of this place perpendicular to steel pipe axis cross section, micrometer inside caliper is inserted its two ends are contacted with the steel pipe inwall, and adjustment differential head and reading are accomplished and measured.The utility model is that micrometer inside caliper provides a kind of simple accurate in locating device, can be used for the measurement of different tube diameters pipe diameter, and gives full play to the measuring accuracy of micrometer inside caliper, avoids artificial factor.

The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.

Claims

1. locating device of measuring the large-diameter steel bore; It is characterized in that: comprise plumbing arm and internal diameter tube in the plumbing arm in first, second; In said first in the plumbing arm and said second plumbing arm in same plane, intersect vertically and be fixedly connected; And divide equally mutually, in the said internal diameter tube and said first in the plumbing arm and said second the plumbing arm intersection be connected, and with said first in the plumbing arm and said second plumbing arm vertical; In said first in the plumbing arm and said second end of plumbing arm be respectively equipped with the sphere contact.

2. the locating device of measurement large-diameter steel bore as claimed in claim 1 is characterized in that: be respectively equipped with the column extension bar on the plumbing arm in the plumbing arm and said second in said first.

3. the locating device of measurement large-diameter steel bore as claimed in claim 2 is characterized in that: in the said column extension bar and said first in the plumbing arm and said second plumbing arm through being threaded.

4. the locating device of measurement large-diameter steel bore as claimed in claim 1 is characterized in that: in the said internal diameter tube and said first in the plumbing arm and said second plumbing arm be connected through bearing respectively.