Positioning mechanism of petroleum pipe external thread sealing surface diameter measuring instrument

Abstract

The utility model discloses a petroleum pipe external thread sealing surface diameter measuring instrument positioning mechanism, which comprises a second cross rod, a connecting part and two sliding parts, the sliding parts are in sliding connection with the connecting part, the bottom of the connecting part is provided with a dovetail groove, the dovetail groove is used for being connected with a measuring instrument, and the number of the sliding parts is two. Mounting cavities are formed in the end parts of the two sliding parts; one end of the adjusting assembly is connected with a roller, and the other end of the adjusting assembly penetrates through the mounting cavity and is connected with the first cross rod; the pressure spring is arranged on the adjusting assembly in a sleeving manner and is positioned below the second cross rod; and after the roller is in contact with the external thread sleeve, the sliding part is matched with the connecting part to realize positioning of the measuring instrument.

Description

Technical Field

[0001] The utility model relates to the technical field of thread detection, and specifically to a positioning mechanism of a diameter measuring instrument for the sealing surface of an external thread of a petroleum pipe. Background Art

[0002] A large number of oil pipes are used in the oil and gas industry, and these pipes are mainly connected by threads. At present, the "API 5B Processing and Measurement of Casing, Tubing, and Line Pipe Threads" and "API 7-2 Processing and Measurement of Rotary Shoulder Threads" widely used in the world have clear regulations on the processing and measurement methods of threads on oil pipes. Due to the harsh working environment of oil pipes, some work in an environment thousands of meters or even tens of thousands of meters underground. In addition to bearing their own weight, they also have to withstand underground high temperatures, high pressures, and even corrosion from harmful substances. In order to improve the competitiveness of their products, various oil pipe manufacturers continue to develop new thread and sealing surface structures to improve the strength of threaded connections and achieve good sealing performance. Otherwise, once the threaded connection fails, it may cause the scrapping of oil wells or oil leakage, which will cause huge losses. In order to ensure the quality of oil pipes, the threads and sealing surfaces of oil pipes must be accurately measured during the processing process to ensure that the manufactured products meet the design specifications.

[0003] As the main energy source, oil and natural gas occupy an important position in the national economy. Several large domestic steel mills produce a large amount of oil pipes every year. In the past, the oil thread single parameter measuring instruments used by domestic enterprises were mainly imported. In recent years, domestic enterprises have been able to independently produce through research and development, and have improved the measuring instruments based on the actual use in production. The external thread sealing surface diameter measuring instrument is widely used in the processing and measurement industry of oil pipe threads. This measurement method is to first calibrate the measuring instrument with a standard block, and find the deviation of the external thread sealing surface diameter by comparative measurement. When measuring, the two contacts should pass through the center of the pipe body, and they should also be measured at different positions. It requires high skills for operators, has high labor intensity, and low efficiency.

[0004] manual Utility Model Content

[0005] The utility model provides a positioning mechanism for a diameter measuring instrument for the external thread sealing surface of a petroleum pipe, which is used to solve the technical defects that in the prior art, the deviation of the external thread sealing surface diameter is found by a comparative measurement method, two contact points should pass through the center of the pipe body during measurement, and measurement should be performed at different positions, which requires high skills of the operator, has high labor intensity and low efficiency.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A positioning mechanism for a diameter measuring instrument for an external thread sealing surface of a petroleum pipe, comprising:

[0008] The second crossbar comprises a connecting portion and a sliding portion, wherein the sliding portion is slidably connected to the connecting portion, a dovetail groove is provided at the bottom of the connecting portion, and the dovetail groove is used to connect to the measuring instrument, and two sliding portions are provided, and the ends of the two sliding portions have mounting cavities;

[0009] An adjusting component, one end of which is connected to a roller, and the other end of which passes through the mounting cavity and is connected to the first crossbar;

[0010] A compression spring, sleeved on the adjustment assembly and located below the second crossbar;

[0011] Wherein, after the roller contacts the external threaded sleeve, the sliding part cooperates with the connecting part to realize the positioning of the measuring instrument.

[0012] Furthermore, the connecting portion is symmetrically provided with two sliding grooves, one end of the two sliding portions is slidably connected to the sliding groove, and the other end is connected to the adjustment assembly; the adjustment assembly includes a bearing seat, one end of the bearing seat is connected to the roller, and the other end passes through the installation cavity and is connected to the first cross bar;

[0013] A linear bearing and a compression spring are sleeved on the bearing seat. The linear bearing is located in the installation cavity, and the compression spring is located below the installation cavity.

[0014] Furthermore, a positioning piece is provided on one end of the sliding portion that is slidably connected to the sliding groove.

[0015] Furthermore, a deep groove ball bearing is provided in the roller.

[0016] Furthermore, the connecting portion is provided with scale lines.

[0017] Furthermore, the bearing seat is a columnar structure.

[0018] Furthermore, movable grooves are provided at both ends of the first cross bar, and one end of the adjustment component connected to the first cross bar is movably connected to the movable groove.

[0019] Furthermore, a first screw and a washer are provided on the top of the adjustment assembly, wherein the first screw is located

[0020] In the movable groove, the gasket contacts the top of the movable groove.

[0021] Furthermore, a set screw is provided on the dovetail groove.

[0022] Furthermore, the first crossbar and the second crossbar are equal in length.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] 1. The mechanism is installed on the external thread sealing surface diameter measuring instrument for use. The two rollers of the positioning mechanism contact the outer circle of the pipe body to form a V-groove positioning. The centering principle of the V-groove positioning is used to make the two contact lines of the external thread sealing surface diameter measuring instrument pass through the center of the pipe body. When measuring, only the pipe body needs to be rotated (or the measuring tool rotates around the pipe body) for one circle to find the diameter deviation of the external thread sealing surface. There is no need to swing the measuring instrument at different positions to find the maximum value to read the diameter deviation of the external thread sealing surface, which reduces human measurement errors, reduces labor intensity, and makes measurement more convenient and accurate.

[0025] 2. By symmetrically opening two sliding grooves on the connecting part and slidingly connecting them with the sliding part, when the distance needs to be adjusted according to the diameter of the external threaded casing, it can be flexibly moved horizontally along the sliding groove, thereby increasing the adjustability and adaptability of the positioning mechanism, so that it can adapt to different working scenes or needs; the connection between the roller and the bearing seat provides stable support, and at the same time, the roller can reduce the friction with the outer circle of the threaded casing; finally, the setting of the adjustment component can realize precise control of the position, and the compression spring provides appropriate elastic force, and the contact pressure between the roller and the measuring instrument can be adjusted as needed, thereby realizing fine-tuning of the position.

[0026] 3. The setting of the positioning piece can accurately position the adjusted distance and at the same time, can also limit the sliding part.

[0027] 4. Deep groove ball bearings have a large load capacity and are suitable for bearing radial and axial loads. Therefore, installing deep groove ball bearings in the roller can significantly improve the roller's load capacity, allowing it to withstand greater weight and impact.

[0028] 5. Scale lines are provided on the connecting part. When the distance between the two sliding parts is adjusted by cooperating with the sliding part and the sliding groove, the adjusted distance can be accurately controlled through the scale lines.

[0029] 6. Bearing seats with columnar structures usually have higher rigidity, which can ensure that the bearing seats are not easily deformed when bearing loads, and maintain accurate positioning and stable operation.

[0030] 7. Both ends of the first cross bar are provided with movable grooves, and one end of the adjustment component connected to the first cross bar is movably connected to the movable groove; during the process of the sliding part and the sliding groove cooperating to adjust the distance, the adjustment component can operate synchronously with the sliding part through the movable groove.

[0031] 8. The arrangement of the screws in the movable groove can ensure a stable connection between the adjustment component and the first cross bar. By tightening the screws, the adjustment component can be firmly fixed in a desired position to prevent accidental movement during use, thereby enhancing the stability of the overall structure.

[0032] 9. The set screw can tightly lock the measuring instrument in the dovetail groove, thereby increasing stability, effectively preventing the measuring instrument from loosening or displacement, and ensuring the stable operation of the measuring instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A three-dimensional schematic diagram of the positioning mechanism of the oil pipe external thread sealing surface diameter measuring instrument provided by the utility model;

[0035] Figure 2 A cross-sectional schematic diagram of the positioning mechanism of the oil pipe external thread sealing surface diameter measuring instrument provided by the utility model;

[0036] Figure 3 A side view of the positioning mechanism of the oil pipe external thread sealing surface diameter measuring instrument provided by the utility model;

[0037] Figure 4 It is the schematic diagram of the measuring instrument structure;

[0038] Among them: 1. bearing seat; 2. shaft; 3. first gasket; 4. deep groove ball bearing; 5. roller; 6. bushing; 7. nut; 8. compression spring; 9. first bearing cover; 10. second cross bar; 11. linear bearing; 12. second bearing cover; 13. connecting rod; 14. second gasket; 15. first screw; 16. first cross bar; 17. set screw; 18. positioning piece; 19. bearing cover screw; 20. threaded sleeve; 21. measuring instrument.

[0039] manual DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, 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 part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invented product is usually placed when in use, it is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0044] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0045] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0046] A large number of oil pipes are used in the oil and gas industry, and these pipes are mainly connected by threads. At present, the "API 5B Processing and Measurement of Casing, Tubing, and Line Pipe Threads" and "API 7-2 Processing and Measurement of Rotary Shoulder Threads" widely used in the world have clear regulations on the processing and measurement methods of threads on oil pipes. Due to the harsh working environment of oil pipes, some work in an environment thousands of meters or even tens of thousands of meters underground. In addition to bearing their own weight, they also have to withstand underground high temperatures, high pressures, and even corrosion from harmful substances. In order to improve the competitiveness of their products, various oil pipe manufacturers continue to develop new thread and sealing surface structures to improve the strength of threaded connections and achieve good sealing performance. Otherwise, once the threaded connection fails, it may cause the scrapping of oil wells or oil leakage, which will cause huge losses. In order to ensure the quality of oil pipes, the threads and sealing surfaces of oil pipes must be accurately measured during the processing process to ensure that the manufactured products meet the design specifications.

[0047] As the main energy source, oil and natural gas occupy an important position in the national economy. Several large domestic steel mills produce a large amount of oil pipes every year. In the past, the oil thread single parameter measuring instruments used by domestic enterprises were mainly imported. In recent years, domestic enterprises have been able to independently produce through research and development, and have improved the measuring instruments based on the actual production situation. External thread sealing surface diameter measuring instruments are widely used in the processing and measurement of oil pipe threads, such as Figure 4 As shown, this measurement method is to first calibrate the measuring instrument with a standard block, and then find the deviation of the diameter of the external thread sealing surface through comparative measurement. When measuring, the two contacts should pass through the center of the pipe body, and also measure at different positions. It requires high skills from the operator, is labor-intensive, and has low efficiency.

[0048] In order to solve the above technical defects, the inventor provides a positioning mechanism for a diameter measuring instrument for the external thread sealing surface of a petroleum pipe, comprising: a second cross bar 10, the second cross bar 10 comprises a connecting portion and a sliding portion, the sliding portion is slidably connected to the connecting portion; two sliding grooves are symmetrically provided on the connecting portion, one end of the two sliding portions is slidably connected to the sliding groove, and the other end is connected to the adjusting component; a dovetail groove is provided at the bottom of the connecting portion, the dovetail groove is used to connect with the measuring instrument 21, two sliding portions are provided, and the ends of the two sliding portions have installation cavities; one end of the adjusting component is connected to a roller 5, and the other end passes through the installation cavity and is connected to the first cross bar 16; a compression spring 8 is sleeved on the adjusting component and is located below the second cross bar 10; wherein, after the roller 5 contacts the external threaded casing 20, the sliding portion cooperates with the connecting portion to realize the positioning of the measuring instrument 21. Figure 1As shown, the mechanism is installed on the external thread sealing surface diameter measuring instrument 21 for use. The two rollers 5 of the positioning mechanism contact the outer circumference of the tube body to form a V-shaped groove for positioning. The centering principle of the V-shaped groove positioning is used to make the two contact connection lines of the external thread sealing surface diameter measuring instrument 21 pass through the center of the tube body. When measuring, only the external threaded sleeve 20 tube body needs to be rotated (or the measuring tool rotates around the tube body) for one circle to find the diameter deviation of the external thread sealing surface. There is no need to swing the measuring instrument 21 at different positions to find the maximum value to read the diameter deviation of the external thread sealing surface, which reduces human measurement errors, reduces labor intensity, and makes measurement more convenient and accurate. Figure 1 and Figure 2 As shown, the adjustment component includes a bearing seat 1. The bearing seat 1 is a columnar structure. One end of the bearing seat 1 is connected to the roller 5, and the other end passes through the installation cavity and is connected to the first cross bar 16. A deep groove ball bearing 4 is installed in the roller 5. The deep groove ball bearing 4 is provided with a first gasket 3. The deep groove ball bearing 4 is connected to the bearing seat 1 through a shaft 2, and a nut 7 is provided on the shaft 2. A sleeve 6 is provided on the outer side of the deep groove ball bearing 4. A linear bearing 11 and a compression spring 8 are sleeved on the bearing seat 1. The linear bearing 11 is located in the installation cavity. A first bearing cover 9 is provided at both ends of the installation cavity. The first bearing cover 9 is fixed to the linear bearing 11 by a bearing cover screw 19, so that the second cross bar 10 can be displaced up and down on the bearing seat 1 through the linear bearing 11. The compression spring 8 is located below the installation cavity, which can provide a certain elastic force for the linear bearing 11. The contact pressure between the roller 5 and the measuring instrument 21 can be adjusted as needed, thereby achieving fine adjustment of the position of the measuring instrument 21. Figure 2-Figure 3 As shown, a positioning member 18 is provided on one end of the sliding part and the sliding groove. In the process of sliding cooperation between the two sliding parts and the sliding groove, the positioning member 18 can position the distance after the sliding part is adjusted, and can also limit the sliding part. At the same time, scale lines are provided on the connecting part, and the setting of the scale lines can accurately control the distance adjustment. The two ends of the first cross bar 16 are provided with movable grooves, and the end of the adjustment component connected to the first cross bar 16 is movably connected to the movable groove. In the process of adjusting the distance between the sliding part and the sliding groove, the adjustment component can work synchronously with the sliding part through the movable groove. The top of the adjustment component is provided with a first screw 15 and a second gasket 14, the first screw 15 is located in the movable groove, the second gasket 14 is in contact with the top of the movable groove, the bearing seat 1 moves in the movable groove through the first screw 15, and the second gasket 14 is used to prevent the first screw 15 from falling off from the movable groove.

[0049] During the specific operation, there is a dovetail groove under the first crossbar 16 connected to the external thread sealing surface diameter measuring instrument 21. The dovetail groove has a good guiding effect and is also convenient for locking. According to the length of the threaded sleeve 20, the positioning mechanism is adjusted to the position where the roller 5 contacts the complete thread crest of the threaded sleeve 20, and then locked with the first screw 15 and the positioning member 18, so that the axial distance of the positioning mechanism is adjusted. The left and right connecting parts of the first crossbar 16 are provided with scales on the outside. According to the diameter of the threaded sleeve 20, the two sliding parts of the second crossbar 10 are adjusted to a symmetrical position and then locked with the positioning member 18. It is necessary to ensure that the roller 5 of the positioning mechanism contacts the complete thread crest of the threaded sleeve 20. At the same time, a gap of 5mm-10mm is left between the connecting rod 13 and the second bearing cover 12, so that the roller 5 always keeps in contact with the complete thread crest of the threaded sleeve 20 under the pressure of the compression spring 8, so that the radial distance of the positioning mechanism is adjusted. The bearing seat 1 is installed on the second crossbar 10, with a linear bearing 11 in the middle to avoid direct friction between the bearing seat 1 and the second crossbar 10, and to make the bearing seat 1 slide up and down flexibly. Under the action of the compression spring 8, the two rollers 5 are guaranteed to contact the outer circle of the threaded sleeve 20 to achieve the positioning effect; the flat surface at the upper end of the bearing seat 1 is precisely matched with the groove of the connecting rod 13 to ensure that the axis of the roller 5 at the lower end of the bearing seat 1 is parallel to the axis of the pipe body. A deep groove ball bearing 4 is installed inside the roller 5, which can not only make the roller 5 rotate flexibly, but also ensure the accuracy of the rotation of the roller 5 and improve the service life of the positioning mechanism; the outer circle of the roller 5 has a taper, and the taper is consistent with the taper of the outer diameter of the measured pipe thread. When measuring, the large end of the roller 5 faces the small end of the pipe body, which makes the roller 5 and the outer circle of the measured pipe thread contact well.

[0050] Set the indicator of the measuring instrument 21 to zero, then loosen the set screw 17 to adjust the axial distance of the roller 5. According to the thread length of the workpiece to be measured, adjust the roller 5 to the appropriate position that is in full contact with the top surface of the thread. After adjustment, lock it with the set screw 17. Loosen the first screw 15 and the positioning piece 18, and adjust the distance between the first crossbar 16 and the second crossbar 10. According to the outer diameter of the threaded sleeve 20 of the workpiece to be measured, adjust the distance between the first crossbar 16 and the second crossbar 10 to the appropriate position. The left and right ends must be adjusted to a symmetrical distance according to the engraved lines. After adjustment, lock it with the first screw 15 and the positioning piece 18. Put the entire set of measuring tools with adjusted positioning mechanisms on the calibration block to check whether the zero position is accurate. If there is a deviation, re-calibrate to zero. After the zero position is calibrated, measurement can be carried out. Place the measuring tool with the zero position calibrated on the end of the external threaded sleeve 20 to be measured, such as Figure 1 The gauge is slightly tilted, and the positioning mechanism link 13 is pulled upward so that the moving probe contacts the sealing surface, while the roller 5 contacts the top of the threaded sleeve 20, and then the gauge's own weight allows the fixed probe to contact the outer sealing surface. The gauge base is placed close to the pipe end of the product being measured, and when the threaded sleeve 20 rotates one circle (or the gauge rotates around the pipe body), the indicator can display the deviation value of the outer thread sealing surface diameter.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A positioning mechanism for a diameter measuring instrument for an external thread sealing surface of a petroleum pipe, characterized in that: include: A second crossbar (10) comprises a connecting portion and a sliding portion, wherein the sliding portion is slidably connected to the connecting portion, a dovetail groove is provided at the bottom of the connecting portion, and the dovetail groove is used to connect to the measuring instrument (21), and two sliding portions are provided, and the ends of the two sliding portions have mounting cavities; An adjustment component, one end of which is connected to a roller (5), and the other end of which passes through the mounting cavity and is connected to a first crossbar (16); A compression spring (8) is sleeved on the adjustment assembly and is located below the second crossbar (10); After the roller (5) contacts the externally threaded sleeve (20), the sliding portion cooperates with the connecting portion to achieve positioning of the measuring instrument (21).

2. The positioning mechanism according to claim 1, characterized in that: The connecting portion is symmetrically provided with two sliding grooves, one end of the two sliding portions is slidably connected to the sliding groove, and the other end is connected to the adjustment component; the adjustment component comprises a bearing seat (1), one end of the bearing seat (1) is connected to the roller (5), and the other end passes through the installation cavity and is connected to the first cross bar (16); The bearing seat (1) is sleeved with a linear bearing (11) and a compression spring (8); the linear bearing (11) is located in the installation cavity, and the compression spring (8) is located below the installation cavity.

3. The positioning mechanism according to claim 2, characterized in that: A positioning piece (18) is provided on one end of the sliding portion that is slidably connected to the sliding groove.

4. The positioning mechanism according to claim 2, characterized in that: A deep groove ball bearing (4) is arranged inside the roller (5).

5. The positioning mechanism according to claim 2, characterized in that: The connecting portion is provided with scale lines.

6. The positioning mechanism according to claim 2, characterized in that: The bearing seat (1) is a columnar structure.

7. The positioning mechanism according to claim 1, characterized in that: Both ends of the first cross bar (16) are provided with movable grooves, and one end of the adjustment component connected to the first cross bar (16) is movably connected to the movable groove.

8. The positioning mechanism according to claim 7, characterized in that: A first screw (15) and a gasket (14) are provided on the top of the adjustment component, wherein the first screw (15) is located in the movable groove, and the gasket (14) is in contact with the top of the movable groove.

9. The positioning mechanism according to claim 1, characterized in that: The dovetail groove is provided with a set screw (17).

10. The positioning mechanism according to claim 1, characterized in that: The first crossbar (16) and the second crossbar (10) are of equal length.

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