Comparison sample plate for detecting pipe end curved surface of oil casing pipe

Abstract

The utility model relates to a comparison sample plate for detecting an oil casing pipe end curved surface, which relates to the technical field of oil casing pipe end detection devices and comprises an internal thread end face upper limit tolerance comparison part, an internal thread end face lower limit tolerance comparison part, an external thread end face upper limit tolerance comparison part and an external thread end face lower limit tolerance comparison part which are arranged on the same sample plate. The oil casing pipe end curved surface detection device can rapidly detect the oil casing pipe end curved surface, and based on the limit tolerance comparison principle, rapid visual detection of a complex curved surface is achieved through double matching of the upper limit tolerance and the lower limit tolerance.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil casing pipe end detection device technical field, specifically, relate to a kind of contrast sample plate for detecting oil casing pipe end curved surface. BACKGROUND

[0002] Oil casing end face often has complex curved surface structure, for example Figures 1-3 The positions shown in the outer thread end face I of oil casing, the inner thread end face II of oil casing, caliper, micrometer and other general measuring tools can only measure simple geometric dimensions, and cannot evaluate the overall compliance of the curved surface profile. Although using a projector or a three-coordinate measuring instrument can detect complex curved surface structure, there are problems such as expensive equipment, complex operation, poor on-site applicability, and high-frequency detection of complex curved surface structure cannot be realized. The size tolerance of the oil casing end face directly affects the sealing performance, and the traditional method cannot meet the detection requirements of high efficiency and high precision. SUMMARY

[0003] The utility model solves the technical problems in view of the above insufficient, provides a kind of contrast sample plate for detecting oil casing pipe end curved surface, can quickly detect oil casing pipe end curved surface, based on limit tolerance comparison principle, through the double matching of upper limit tolerance and lower limit tolerance, realize the rapid visual detection of complex curved surface.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: a kind of contrast sample plate for detecting oil casing pipe end curved surface, including the upper limit tolerance comparison part of inner thread end face, the lower limit tolerance comparison part of inner thread end face, the upper limit tolerance comparison part of outer thread end face and the lower limit tolerance comparison part of outer thread end face being set on the same sample plate.

[0005] As a further improvement of the above technical scheme:

[0006] The upper limit tolerance comparison part of inner thread end face includes first straight edge part and first bevel part, and the first straight edge part and the first bevel part form an inward angle a, and a is the upper limit tolerance angle of inner thread end face.

[0007] The connecting portion of the first straight edge part and the first bevel part is provided with an upper limit tolerance profile surface a1 of inner thread end face.

[0008] The lower limit tolerance comparison part of inner thread end face includes second straight edge part and second bevel part, and the second straight edge part and the second bevel part form an inward angle b, and b is the lower limit tolerance angle of inner thread end face.

[0009] The connecting portion of the second straight edge part and the second bevel part is provided with a lower limit tolerance profile surface b1 of inner thread end face.

[0010] The upper limit tolerance contrast part of the external thread end face comprises a third straight edge part and a third bevel part, the third straight edge part and the third bevel part form an inward included angle c, and c is an upper limit tolerance angle of the external thread end face.

[0011] A connecting part of the third straight edge part and the third bevel part is provided with an upper limit tolerance profile surface c1 of the external thread end face.

[0012] The lower limit tolerance contrast part of the external thread end face comprises a fourth straight edge part and a fourth bevel part, the fourth straight edge part and the fourth bevel part form an inward included angle d, and d is a lower limit tolerance angle of the external thread end face.

[0013] A connecting part of the fourth straight edge part and the fourth bevel part is provided with a lower limit tolerance profile surface d1 of the external thread end face.

[0014] The utility model discloses the following advantages are obtained by adopting the above technical scheme: the utility model can quickly detect the oil casing pipe end curved surface, and based on the limit tolerance contrast principle, realizes the quick visual detection of complex curved surface through the double matching of upper limit tolerance and lower limit tolerance.

[0015] The utility model will be further described below in combination with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structural schematic diagram of oil casing external thread end face and internal thread end face in the background art;

[0017] Figure 2 It is the partial enlarged view of I part in the background art;

[0018] Figure 3 It is the partial enlarged view of II part in the background art;

[0019] Figure 4 It is the structural schematic diagram of the contrast sample board of detecting oil casing pipe end curved surface in the utility model embodiment;

[0020] Figure 5 It is the structural schematic diagram of the measured oil casing external thread end face in the utility model embodiment 2 and is placed in the upper limit tolerance contrast part of the external thread end face;

[0021] Figure 6 It is the structural schematic diagram of the measured oil casing external thread end face in the utility model embodiment 2 and is placed in the lower limit tolerance contrast part of the external thread end face;

[0022] Figure 7 It is the structural schematic diagram of the measured oil casing internal thread end face in the utility model embodiment 3 and is placed in the upper limit tolerance contrast part of the internal thread end face;

[0023] Figure 8It is the structure schematic view of the measured oil casing internal thread end face being placed in the internal thread end face lower limit tolerance comparison part in the embodiment 3 of the utility model.

[0024] In the drawing: 1 is the internal thread end face upper limit tolerance comparison part, 2 is the internal thread end face lower limit tolerance comparison part, 3 is the external thread end face upper limit tolerance comparison part, 4 is the external thread end face lower limit tolerance comparison part, 5 is the first straight edge part, 6 is the first bevel part, 7 is the second straight edge part, 8 is the second bevel part, 9 is the third straight edge part, 10 is the third bevel part, 11 is the fourth straight edge part, 12 is the fourth bevel part. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0026] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" are based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0027] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise explicitly and specifically limited. Embodiment 1

[0028] As shown in Figure 4 A contrast sample plate for detecting oil casing end surface, including internal thread end face upper limit tolerance comparison part 1, internal thread end face lower limit tolerance comparison part 2, external thread end face upper limit tolerance comparison part 3 and external thread end face lower limit tolerance comparison part 4 arranged on the same sample plate.

[0029] The upper limit tolerance comparison part 1 of the internal thread end face includes a first straight edge part 5 and a first bevel part 6, the first straight edge part 5 and the first bevel part 6 form an inward included angle a, a is an internal thread end face upper limit tolerance angle, and the junction of the first straight edge part 5 and the first bevel part 6 is provided with an internal thread end face upper limit tolerance profile surface a1;

[0030] The lower limit tolerance comparison part 2 of the internal thread end face includes a second straight edge part 7 and a second bevel part 8, the second straight edge part 7 and the second bevel part 8 form an inward included angle b, b is an internal thread end face lower limit tolerance angle, and the junction of the second straight edge part 7 and the second bevel part 8 is provided with an internal thread end face lower limit tolerance profile surface b1;

[0031] Wherein, a and b are set according to the actual size of the measured oil casing internal thread end face;

[0032] The upper limit tolerance comparison part 3 of the external thread end face includes a third straight edge part 9 and a third bevel part 10, the third straight edge part 9 and the third bevel part 10 form an inward included angle c, c is an external thread end face upper limit tolerance angle, and the junction of the third straight edge part 9 and the third bevel part 10 is provided with an external thread end face upper limit tolerance profile surface c1;

[0033] The lower limit tolerance comparison part 4 of the external thread end face includes a fourth straight edge part 11 and a fourth bevel part 12, the fourth straight edge part 11 and the fourth bevel part 12 form an inward included angle d, d is an external thread end face lower limit tolerance angle, and the junction of the fourth straight edge part 11 and the fourth bevel part 12 is provided with an external thread end face lower limit tolerance profile surface d1;

[0034] Wherein, c and d are set according to the actual size of the measured oil casing external thread end face. Example 2

[0035] The detection method of the external thread end face:

[0036] 1. Place the measured oil casing external thread end face at the upper limit tolerance comparison part 3 of the external thread end face, the alignment reference surface B of the oil casing external thread end face coincides with the third straight edge part 9, if the profile surface e of the measured oil casing external thread end face has no gap with the upper limit tolerance profile surface c1 of the external thread end face, and at the same time, the angle f of the measured oil casing external thread end face is less than c, as shown in the figure, Figure 5 then the measured oil casing external thread end face meets the requirements of the upper limit tolerance comparison part 3 of the external thread end face, otherwise, it does not meet the requirements.

[0037] 2. Place the measured oil casing external thread end face at the lower limit tolerance comparison part 4 of the external thread end face, the alignment reference surface B of the oil casing external thread end face coincides with the fourth straight edge part 11, if the profile surface e of the measured oil casing external thread end face has a gap with the lower limit tolerance profile surface d1 of the external thread end face, and at the same time, the angle f of the measured oil casing external thread end face is greater than d, as shown in the figure, Figure 6If the measured oil casing external thread end face meets the requirement of the upper limit tolerance contrast part 3 of the external thread end face and the requirement of the lower limit tolerance contrast part 4 of the external thread end face, the measured oil casing external thread end face is qualified, otherwise, it is unqualified.

[0038] If the measured oil casing external thread end face meets the requirement of the upper limit tolerance contrast part 3 of the external thread end face and the requirement of the lower limit tolerance contrast part 4 of the external thread end face, the measured oil casing external thread end face is qualified, otherwise, it is unqualified. Example 3

[0039] The detection method of the internal thread end face is as follows:

[0040] 1. The measured oil casing internal thread end face is placed at the upper limit tolerance contrast part 1 of the internal thread end face, the alignment reference surface A of the oil casing internal thread end face is coincided with the first straight edge part 5, if the profile surface g of the measured oil casing internal thread end face is without gap with the upper limit tolerance profile surface a1 of the internal thread end face, and the angle h of the measured oil casing internal thread end face is less than a, as shown in the figure, Figure 7 If the measured oil casing internal thread end face meets the requirement of the upper limit tolerance contrast part 1 of the internal thread end face, otherwise, it does not meet the requirement.

[0041] 2. The measured oil casing internal thread end face is placed at the lower limit tolerance contrast part 2 of the internal thread end face, the alignment reference surface A of the oil casing internal thread end face is coincided with the second straight edge part 7, if the profile surface g of the measured oil casing internal thread end face is with gap with the lower limit tolerance profile surface b1 of the internal thread end face, and the angle h of the measured oil casing internal thread end face is greater than b, as shown in the figure, Figure 8 If the measured oil casing internal thread end face meets the requirement of the lower limit tolerance contrast part 2 of the internal thread end face, otherwise, it does not meet the requirement.

[0042] If the measured oil casing internal thread end face meets the requirement of the upper limit tolerance contrast part 1 of the internal thread end face and the requirement of the lower limit tolerance contrast part 2 of the internal thread end face, the measured oil casing internal thread end face is qualified, otherwise, it is unqualified.

[0043] The above only describes the preferred embodiments of the present utility model, and does not limit the present utility model, any modification, equivalent replacement and improvement within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A contrast template for detecting a surface of a casing or tubing end, characterized in that: The upper limit tolerance comparison part (1) of the internal thread end face, the lower limit tolerance comparison part (2) of the internal thread end face, the upper limit tolerance comparison part (3) of the external thread end face and the lower limit tolerance comparison part (4) of the external thread end face are arranged on the same plate.

2. The contrast template for detecting the surface of the casing or tubing end according to claim 1, characterized in that: The upper limit tolerance comparison part (1) of the internal thread end face comprises a first straight edge part (5) and a first bevel part (6), the first straight edge part (5) and the first bevel part (6) form an inward included angle a, and a is the upper limit tolerance angle of the internal thread end face.

3. The contrast template for detecting the surface of the casing or tubing end according to claim 2, characterized in that: The junction of the first straight edge part (5) and the first bevel part (6) is provided with an upper limit tolerance profile surface a1 of the internal thread end face.

4. The contrast template for detecting the surface of the casing or tubing end according to claim 3, characterized in that: The lower limit tolerance comparison part (2) of the internal thread end face comprises a second straight edge part (7) and a second bevel part (8), the second straight edge part (7) and the second bevel part (8) form an inward included angle b, and b is the lower limit tolerance angle of the internal thread end face.

5. The contrast template for detecting the surface of the casing or tubing end according to claim 4, characterized in that: The junction of the second straight edge part (7) and the second bevel part (8) is provided with a lower limit tolerance profile surface b1 of the internal thread end face.

6. The contrast template for detecting the surface of the casing or tubing end according to claim 5, characterized in that: The upper limit tolerance comparison part (3) of the external thread end face comprises a third straight edge part (9) and a third bevel part (10), the third straight edge part (9) and the third bevel part (10) form an inward included angle c, and c is the upper limit tolerance angle of the external thread end face.

7. The contrast template for detecting the surface of the casing or tubing end according to claim 6, characterized in that: The junction of the third straight edge part (9) and the third bevel part (10) is provided with an upper limit tolerance profile surface c1 of the external thread end face.

8. The contrast template for detecting the surface of the casing or tubing end according to claim 7, characterized in that: The lower limit tolerance comparison part (4) of the external thread end face comprises a fourth straight edge part (11) and a fourth bevel part (12), the fourth straight edge part (11) and the fourth bevel part (12) form an inward included angle d, and d is the lower limit tolerance angle of the external thread end face.

9. The contrast template for detecting the surface of the casing or tubing end according to claim 8, characterized in that: The junction of the fourth straight edge part (11) and the fourth bevel part (12) is provided with a lower limit tolerance profile surface d1 of the external thread end face.

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