CN201074994Y - Numerical display calliper rule for measuring diameter of petroleum case pipe and oil tube conical male thread tooth top - Google Patents
Numerical display calliper rule for measuring diameter of petroleum case pipe and oil tube conical male thread tooth top Download PDFInfo
- Publication number
- CN201074994Y CN201074994Y CNU2007200986232U CN200720098623U CN201074994Y CN 201074994 Y CN201074994 Y CN 201074994Y CN U2007200986232 U CNU2007200986232 U CN U2007200986232U CN 200720098623 U CN200720098623 U CN 200720098623U CN 201074994 Y CN201074994 Y CN 201074994Y
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- measurement
- slide block
- digital display
- petroleum casing
- tooth top
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The utility model provides a digital display caliper for the measurement of the diameters of crests of conical external threads of petroleum casing pipes and oil pipes, the caliper includes a caliper body which is provided with a fixed jaw, a slide block which is provided with a movable jaw, a measurement contact shoe with the planar measurement working surface which can swing within a certain range, a digital display which can set the zero again and a standard sample block which is matched with the digital display for the measurement of the external threads of petroleum casing pipes and oil pipes; the slide block is glidingly connected on the caliper body, the measurement contact shoe is respectively fixed at the caliper body and the inside of the jaw of the slide block, the digital display is connected on the slide block and is tightly attached to the caliper body. The utility model has the effects that the positioning datum plane of the caliper has the fixed form, which has no need of adjustment according to the specifications of the external threads of the pipes, thereby improving the accuracy of the measurement results. The measurement contact shoe can cover the thread with the corresponding length and swing within the small range, which is not only applicable to the measurement of all the buckling types and the casing pipes and oil pipes with all specifications of the API standard, but also is applicable to the allowable taper changes of the threads within the tolerance limits. The comparative measurement has the intuitive effects.
Description
Technical field
The utility model relates to petroleum casing pipe and oil tube external thread processing test measuring device, particularly a kind of petroleum casing pipe and the measurement petroleum casing pipe of tubing thread fixed position tooth top diameter and digital display card chi of oil pipe conical external screw thread tooth top diameter that is used to have tapering.
Background technology
Petroleum casing pipe and tubing thread processing are the committed steps that oil country tubular goods is made.Geometric parameter for screw thread has the higher quality requirement, because petroleum casing pipe and oil tube external thread are tapered thread, its diameter is directly measured in inconvenience, so now generally adopt at a certain fixed range of male end place, measures the tooth top diameter of screw thread.Existing survey instrument generally must be earlier adjusted to the axial location of setting with the axial location standard sample with the contact of measurer, then with the zero-bit of diameter standard sample adjustment measurer, measures the tooth top diameter of screw thread again, just can measure its deviate.Such measuring method, the measurer complex structure of use is operated loaded down with trivial detailsly, owing to need demarcate measurer at both direction axially and radially, therefore is difficult to control its measuring accuracy.
So, very be necessary to solve petroleum casing pipe and the inconvenient problem of tubing thread diameter detection by a kind of effective measurer.
Summary of the invention
The purpose of this utility model provides a kind of screw thread tooth top diameter measurement instrument rational in infrastructure, easy and simple to handle---measure the digital display card chi of petroleum casing pipe and oil pipe conical external screw thread tooth top diameter.
For achieving the above object, the technical solution adopted in the utility model provides a kind of digital display card chi of measuring petroleum casing pipe and oil pipe conical external screw thread tooth top diameter, wherein: these slide calliper rule comprise the blade A that has stationary jaw, the slide block B that has movable jaw, surveying work face be the plane and can be at the digital indicator D of the measurement contact shoes C of certain limit swing, zero setting again and the external thread standard sample E of conjunction measuring petroleum casing pipe and oil pipe with it; Described slide block B is slidingly connected on the blade A, and described measurement contact shoes C is separately fixed at the claw inboard of blade A and slide block B, and described digital indicator D is connected on the slide block B, and is close to blade A.
Excellent part of the present utility model is:
One, the positioning reference plane of slide calliper rule is made as fixed form, has avoided the loaded down with trivial details step according to the adjustment of external pipe thread specification different needs, has improved the accuracy of measurement result simultaneously.
Two, be designed to the contact shoes of longer size, can cover the screw thread of respective length.Thereby the utility model can be used for whole button-types and the sleeve pipe of whole specifications and the measurement of oil pipe of API (American Petroleum Institute (API)) standard.
Three, contact shoes is measured in the swing that is designed to do by a small margin, can adapt to screw thread and change at the tapering that margin tolerance allows.In margin tolerance, the workplace of measuring contact shoes can lean tightly with thread ideally.
Four, be designed to the external thread kind of calliper contact shoes on plane respectively, can contact threadably tooth top ideally.
Five, standard sample is according to the Cross section Design by the external pipe thread axis, thereby metering system of the present utility model is that comparison expression is measured, and has effect directly perceived.
Six, digital indicator can zero setting again after slide calliper rule are proofreaied and correct with standard sample, thereby can directly read deviate when measuring gas pipe thread, is convenient to measurement result is judged.
Description of drawings
Fig. 1 is footpath, external thread top slide calliper rule one-piece construction figure;
Fig. 2 a and Fig. 2 b are external thread tooth top diameter slide calliper rule user mode synoptic diagram.
Among the figure:
A-has the blade of stationary jaw
B-has the slide block of movable jaw
C-measures contact shoes
The D-digital indicator
The E-standard sample
1-slide calliper rule positioning reference plane
The pipe end reference field of 2-standard sample
The semi-cone angle of β-gas pipe thread
The axial location length in footpath, a-screw thread top
The footpath, screw thread top at b-axial location place
The tube end external thread that P-is measured
Embodiment
Reaching embodiment in conjunction with the accompanying drawings will be described further the digital display card chi of measurement petroleum casing pipe of the present utility model and oil pipe conical external screw thread tooth diameter.
The digital display card chi structure of measurement petroleum casing pipe of the present utility model and oil pipe conical external screw thread tooth diameter be these slide calliper rule comprise the blade A that has stationary jaw, the slide block B that has movable jaw, surveying work face be the plane and can be at the digital indicator D of the measurement contact shoes C of certain limit swing, zero setting again and the external thread standard sample E of conjunction measuring petroleum casing pipe and oil pipe with it; Described slide block B is slidingly connected on the blade A, and described measurement contact shoes C is separately fixed at the claw inboard of blade A and slide block B, and described digital indicator is connected on the slide block B, and is close to blade A.
The hunting range of described measurement contact shoes C is 0 to 3 degree, and fixedly the workplace of the measurement contact shoes C of the claw inboard of blade A is a plane, and the length of measuring contact shoes C is 25 to 40 millimeters.
Described standard sample E one has certain thickness tabular sample piece, and its flat shape is to measure petroleum casing pipe and externally threaded cross section by longitudinal axis, the sub-end of oil pipe, and this cross section is one trapezoidal, and the thickness of standard sample E is 15 to 20 millimeters.
The digital display card chi of measurement petroleum casing pipe of the present utility model and oil pipe conical external screw thread tooth diameter is when measuring external thread, earlier on a standard sample with survey workpiece identical parameters, proofread and correct slide calliper rule, and numeral shown zero setting, use the kind of calliper external pipe thread then, can directly read the geometrical deviation of external thread tooth top diameter.
Embodiment: shown in Fig. 1 and Fig. 2 a, Fig. 2 b, the standard sample E of external thread tooth top footpath slide calliper rule one has certain thickness tabular sample piece.Its flat shape is an externally threaded cross section by longitudinal axis of tube end, and this cross section is one trapezoidal.Standard sample is designed to have corresponding geometric accuracy.On the sample piece, small end plane 2 is reference positions of measured pipe end, with small end plane 2 apart from a place, be the assigned address in footpath, screw thread top that need to measure.Because the tapering of measured screw thread is allowed to certain deviation usually, so the measurement contact shoes C of slide calliper rule is designed to do swing by a small margin, the workplace of measuring contact shoes is the plane.
When measuring the pipe end external thread, at first set the zero position of slide calliper rule.The positioning reference plane 1 of male end slide calliper rule and the small end plane 2 of standard sample are close to, and adjustment movable jaw B is close to the workplace of two contact shoes and the side of sample piece.The demonstration numerical value of digital indicator D is changed to zero.Then, the positioning reference plane 1 and the pipe end of external thread slide calliper rule is close to, adjusts movable jaw B the workplace of two contact shoes and the tooth top of gas pipe thread are close to, promptly can directly on digital indicator, read screw thread and push up dimensional discrepancy directly.
Claims (4)
1. digital display card chi of measuring petroleum casing pipe and oil pipe conical external screw thread tooth top diameter is characterized in that: these slide calliper rule comprise the blade (A) that has stationary jaw, the slide block (B), the surveying work face that have movable jaw be the plane and can be at the digital indicator (D) of the measurement contact shoes (C) of certain limit swing, zero setting again and the external thread standard sample (E) of conjunction measuring petroleum casing pipe and oil pipe with it; Described slide block (B) is slidingly connected on the blade (A), and described measurement contact shoes (C) is separately fixed at the claw inboard of blade (A) and slide block (B), and described digital indicator (D) is connected on the slide block (B), and is close to blade (A).
2. the digital display card chi of measurement petroleum casing pipe according to claim 1 and oil pipe conical external screw thread tooth top diameter is characterized in that: the hunting range of described measurement contact shoes (C) is 0 to 3 degree.
3. the digital display card chi of measurement petroleum casing pipe according to claim 1 and oil pipe conical external screw thread tooth top diameter, it is characterized in that: fixedly the workplace of the measurement contact shoes (C) of the claw inboard of blade (A) is a plane, and the length of measuring contact shoes (C) is 25 to 40 millimeters.
4. the digital display card chi of measurement petroleum casing pipe according to claim 1 and oil pipe conical external screw thread tooth top diameter, it is characterized in that: described standard sample (E) is one to have certain thickness tabular sample piece, its flat shape is to measure petroleum casing pipe and externally threaded cross section by longitudinal axis, the sub-end of oil pipe, this cross section is one trapezoidal, and the thickness of standard sample (E) is 15 to 20 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200986232U CN201074994Y (en) | 2007-09-24 | 2007-09-24 | Numerical display calliper rule for measuring diameter of petroleum case pipe and oil tube conical male thread tooth top |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200986232U CN201074994Y (en) | 2007-09-24 | 2007-09-24 | Numerical display calliper rule for measuring diameter of petroleum case pipe and oil tube conical male thread tooth top |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201074994Y true CN201074994Y (en) | 2008-06-18 |
Family
ID=39520254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200986232U Expired - Fee Related CN201074994Y (en) | 2007-09-24 | 2007-09-24 | Numerical display calliper rule for measuring diameter of petroleum case pipe and oil tube conical male thread tooth top |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201074994Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111023946A (en) * | 2019-12-19 | 2020-04-17 | 中国石油天然气集团有限公司 | Petroleum pipe external thread top diameter measuring instrument and method |
-
2007
- 2007-09-24 CN CNU2007200986232U patent/CN201074994Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111023946A (en) * | 2019-12-19 | 2020-04-17 | 中国石油天然气集团有限公司 | Petroleum pipe external thread top diameter measuring instrument and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080618 Termination date: 20100924 |