Mounting structure and method of ocean platform strain sensor

Abstract

The invention provides an installation structure and method of an ocean platform strain sensor, and the installation structure comprises an installation seat, a positioning rod and a precision tool, and also provides an installation method of the ocean platform strain sensor, so that two first binding surfaces at two ends of the positioning rod are coaxial and coplanar, and two second binding surfaces at two ends are coaxial and coplanar. The postures of the two mounting seats are relatively determined by fitting the first fitting surfaces with the first positioning cylindrical surfaces and fitting the second fitting surfaces with the second positioning cylindrical surfaces, so that the two third positioning cylindrical surfaces are coplanar and coaxial, the two third positioning cylindrical surfaces are simultaneously fitted with the jacket, and the axes of the two first positioning cylindrical surfaces are parallel to the axis of the jacket; after the strain sensor is installed on the first positioning cylindrical surface, the axis of the strain sensor is parallel to the axis of the jacket and is not subjected to torque, and the strain sensor can accurately measure the change of the jacket.

Description

Technical Field

[0001] The present invention relates to the field of offshore platform installation, and in particular to an installation structure and method of an offshore platform strain sensor. Background Art

[0002] During the construction of an offshore platform, the jacket needs to be built first. From the jacket horizontal construction to the stage of being put into the sea and righted, sensors are needed to monitor the jacket status. Since the jacket itself is heavy (10,000 tons) and the weight of the upper assembly of the jacket is large (10,000 tons), the sensor needs to have a wide range. In addition, the actual production conditions of the jacket will be affected by wind, wave and current environmental loads. In order to accurately monitor the impact of the complex environment on the jacket, the sensor needs to have high precision.

[0003] However, the installation process and environment of existing strain sensors are complex, which has a great impact on the installation quality. In addition, the installation is done manually, which results in the installation accuracy and measuring range being difficult to meet the requirements after the sensor is installed. Summary of the invention

[0004] The present invention provides an installation structure and method for an offshore platform strain sensor to overcome the above problems.

[0005] A mounting structure for an offshore platform strain sensor, comprising: a mounting seat, a positioning rod and a precision tooling; The mounting seat comprises a first positioning cylindrical surface, a second positioning cylindrical surface and a third positioning cylindrical surface with axes parallel to each other, and both ends of the positioning rod are provided with a first fitting surface and a second fitting surface, the first fitting surface can fit with the first positioning cylindrical surface, and the second fitting surface can fit with the second positioning cylindrical surface; the third positioning cylindrical surface fits with the catheter frame; The precision tooling can clamp both ends of the strain sensor so that the strain sensor remains in a state to be installed; The two ends of the strain sensor are respectively mounted on two first positioning cylindrical surfaces.

[0006] Furthermore, it also includes a pressing piece, which is installed on the mounting seat through bolts and presses the positioning rod or the strain sensor onto the first positioning column surface.

[0007] Further, the mounting seat has a mounting step groove; The first positioning cylindrical surface and the second positioning cylindrical surface constitute the inner surface of the mounting step groove, a first abutting surface perpendicular to the axis of the first positioning cylindrical surface is provided between the first positioning cylindrical surface and the second positioning cylindrical surface, a second abutting surface is provided between the first fitting surface and the second fitting surface, and the first abutting surface and the second abutting surface abut each other.

[0008] Furthermore, it also includes a pressing piece, the pressing piece has a pressing step groove, when the pressing piece is installed on the mounting seat, the pressing step groove and the mounting step groove form a first cylindrical hole and a second cylindrical hole axially connected; The end of the positioning rod is provided with a first cylindrical portion having the first fitting surface and a second cylindrical portion having the second fitting surface, the first cylindrical portion is arranged in the first cylindrical hole, and the second cylindrical portion is arranged in the second cylindrical hole.

[0009] Furthermore, the precision tooling includes a clamping seat and a stretching bolt, both ends of the strain sensor are clamped by the clamping seat, the clamping seat has a through hole, the stretching bolt passes through the through holes located at both ends of the strain sensor in sequence, and a first nut and a second nut sleeved on the stretching bolt are provided between the two clamping seats, the first nut and the bolt head of the stretching bolt clamp the clamping seat at one end of the strain sensor, and the second nut abuts against the clamping seat at the other end of the strain sensor.

[0010] Furthermore, there are two tension bolts in total, and the two tension bolts are disposed on both sides of the strain sensor.

[0011] A method for installing an offshore platform strain sensor comprises the following steps: S1, fit the first fitting surfaces at both ends of the positioning rod to the first positioning cylindrical surfaces of the two mounting seats respectively, and keep the fit state, fit the second fitting surfaces at both ends of the positioning rod to the second positioning cylindrical surfaces of the two mounting seats respectively, and keep the fit state; S2, placing the mounting seat at the position to be installed on the catheter rack, so that the third positioning cylinder surfaces of the two mounting seats are in contact with the catheter rack; S3, fixing the two mounting seats on the catheter frame; S4, removing the positioning rod; S5, placing the strain sensor clamped by the precision tooling between the two mounting seats, so that both ends of the strain sensor are in contact with the first positioning cylindrical surface; S6, fixing the two ends of the strain sensor on the first positioning cylindrical surfaces of the two mounting seats respectively; S7. Dismantle the precision tooling.

[0012] Furthermore, S1 also includes connecting the clamping member to the mounting seat by bolts, so that the relative positions of the positioning rod and the mounting seat are kept fixed, and the third positioning surfaces of the mounting seats at both ends are coplanar.

[0013] Furthermore, the first columnar portion and the second columnar portion at the end of the positioning rod are installed in the mounting step groove, so that the second abutting surface between the first columnar portion and the second columnar portion abuts against the first abutting surface in the mounting step groove.

[0014] Furthermore, S5 also includes clamping two ends of the strain sensor by two clamping seats of the precision tooling respectively; Pass the tension bolts through the through holes of the clamping seats at both ends in sequence; Rotate the first nut disposed between the clamping seats at both ends so that the first nut and the bolt head of the tension bolt clamp the clamping seat at one end; Rotate the second nut disposed between the clamping seats at both ends so that the second nut abuts against the clamping seat at the other end; Rotate the second nut to move the two clamping seats away from each other, and monitor the state of the strain sensor at the same time; When the state of the strain sensor reaches a preset value, the rotation of the second nut is stopped and the strain sensor is in a state to be installed.

[0015] The present invention discloses an installation structure of an offshore platform strain sensor, wherein two first fitting surfaces at both ends of a positioning rod are coaxial and coplanar, and two second fitting surfaces at both ends are coaxial and coplanar, and the postures of the two mounting seats are relatively determined by fitting the first fitting surface with the first positioning cylindrical surface and the second fitting surface with the second positioning cylindrical surface, thereby ensuring that the two third positioning cylindrical surfaces are coplanar and coaxial, and the two third positioning cylindrical surfaces are simultaneously fitted with the conductor frame, so that the axes of the two first positioning cylindrical surfaces are parallel to the axis of the conductor frame, ensuring that after the strain sensor is installed on the first positioning cylindrical surface, the axis of the strain sensor is parallel to the axis of the conductor frame and will not be affected by torque, and the strain sensor can accurately measure changes in the conductor frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 This is a schematic diagram of a positioning rod installed on a mounting seat in a mounting structure of an offshore platform strain sensor according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the installation of a precision tooling clamping a strain sensor in an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a strain sensor and a mounting base in an embodiment of the present invention; Figure 4 This is a schematic diagram of the strain sensor in the embodiment of the present invention after installation; Figure 5 is a schematic diagram of the positioning rod structure in an embodiment of the present invention; Figure 6 is a schematic diagram of the structure of a mounting base in an embodiment of the present invention; Figure 7 is a schematic diagram of the structure of a pressing member in an embodiment of the present invention; Figure 8 It is a schematic diagram of the assembly structure of the pressing member and the mounting seat in an embodiment of the present invention; Fig. 9 Schematic diagram of the structure of the precision tooling clamping strain sensor in an embodiment of the present invention.

[0018] In the figure: 1. Mounting seat; 11. First positioning cylindrical surface; 12. Second positioning cylindrical surface; 13. Third positioning cylindrical surface; 14. Mounting stepped groove; 15. First abutting surface; 2. Positioning rod; 21. First fitting surface; 22. Second fitting surface; 23. Second abutting surface; 24. First columnar portion; 25. Second columnar portion; 3. Precision tooling; 31. Clamping seat; 32. Tensile bolt; 33. First nut; 34. Second nut; 4. Strain sensor; 5. Conductor rack; 6. Pressing member; 61. Pressing stepped groove; 62. First cylindrical hole; 63. Second cylindrical hole. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. 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.

[0020] In this embodiment, the strain sensor is a fiber Bragg grating strain sensor. After the construction of the catheter frame is completed, when it is put into use, the accuracy and measurement range of the strain sensor will not meet the requirements. Specifically, the accuracy of the strain sensor is poor: during the use of multiple sensors, it will be found that the sensor measurement values ​​have obvious accuracy deviations, which do not conform to normal changes; in addition, there is a range deviation, such as the fiber Bragg grating sensor range is 0~3000με, if the initial value is 1500με, the actual range is ±1500με, if the initial value is 2000με, the actual range is -2000~1000με, which affects the use of the sensor.

[0021] After research, it was found that the reason why the strain sensor has accuracy deviation is due to the problem of strain sensor installation. Specifically, the strain sensor needs to be parallel to the pipe to be tested; the strain sensor itself cannot withstand torque, otherwise, the value measured by the strain sensor will be too large or too small. The type of strain sensor does not affect the implementation of the technical solution of the present invention. Any type of strain sensor can apply the technical solution disclosed in this application.

[0022] like Figure 1-Figure 9 As shown, this embodiment discloses a mounting structure of an offshore platform strain sensor, comprising: a mounting seat 1, a positioning rod 2 and a precision tooling 3; The mounting seat 1 comprises a first positioning cylindrical surface 11, a second positioning cylindrical surface 12 and a third positioning cylindrical surface 13 with axes parallel to each other, and both ends of the positioning rod 2 are provided with a first fitting surface 21 and a second fitting surface 22, the first fitting surface 21 can fit with the first positioning cylindrical surface 11, and the second fitting surface 22 can fit with the second positioning cylindrical surface 12; the third positioning cylindrical surface 13 fits with the catheter frame 5; The precision tooling 3 can clamp both ends of the strain sensor 4 to keep the strain sensor 4 in a state to be installed; Two ends of the strain sensor 4 are respectively mounted on two first positioning cylindrical surfaces 11 .

[0023] The present invention discloses an installation structure of an offshore platform strain sensor, wherein two first fitting surfaces at both ends of a positioning rod are coaxial and coplanar, and two second fitting surfaces at both ends are coaxial and coplanar, and the postures of the two mounting seats are relatively determined by fitting the first fitting surface with the first positioning cylinder surface and the second fitting surface with the second positioning cylinder surface, thereby ensuring that the two third positioning cylinder surfaces are coplanar and coaxial, and the two third positioning cylinder surfaces are cylinder surfaces with the same diameter as the catheter frame, and the two third positioning cylinder surfaces are simultaneously fitted with the catheter frame, so that the axes of the two first positioning cylinder surfaces are parallel to the axis of the catheter frame, ensuring that after the strain sensor is installed on the first positioning cylinder surface, the axis of the strain sensor is parallel to the axis of the catheter frame and will not be affected by torque, and the strain sensor can accurately measure changes in the catheter frame.

[0024] The precision tooling keeps the strain sensor in a state to be installed. The state to be installed described in this embodiment is a state in which the strain sensor is kept under a certain tensile stress. In this state, the strain sensor can detect whether the stress increases or decreases. The appropriate tensile stress range can make the strain sensor have an appropriate range. The precision tooling can keep the strain sensor in a state to be installed in advance to avoid the strain sensor being affected by the on-site environment when applying tensile stress during the on-site installation process, which affects the installation effect of the strain sensor. The precision tooling can make the strain sensor have high range accuracy and good consistency, and the on-site operation is simple and convenient, with high work efficiency.

[0025] In this embodiment, a pressing member 6 is further included, and the pressing member 6 is mounted on the mounting seat 1 by bolts, and presses the positioning rod 2 or the strain sensor 4 on the first positioning cylindrical surface 11. The pressing member 6 is fixed to the mounting seat 1 by bolts, so that the pressing member 6 presses the positioning rod 2 on the first positioning cylindrical surface 11, thereby preventing the positioning rod 2 from rotating or displacing, preventing the fitting surface from being separated from the positioning cylindrical surface, and ensuring the positioning accuracy.

[0026] In this embodiment, the mounting seat 1 has a mounting step groove 14; The first positioning cylindrical surface 11 and the second positioning cylindrical surface 12 constitute the inner surface of the mounting step groove 14, and a first abutting surface 15 perpendicular to the axis of the first positioning cylindrical surface 11 is provided between the first positioning cylindrical surface 11 and the second positioning cylindrical surface 12, and a second abutting surface 23 is provided between the first fitting surface 21 and the second fitting surface 22, and the first abutting surface 15 and the second abutting surface 23 abut against each other.

[0027] The first abutting surface fits the second abutting surface to determine the distance between the two positioning seats, thereby ensuring the clamping distance at both ends of the strain sensor, further making the installation process and installation adjustment of the strain sensor controllable, and ensuring the installation quality of the strain sensor.

[0028] In this embodiment, the pressing member 6 has a pressing stepped groove 61. When the pressing member 6 is installed on the mounting seat 1, the pressing stepped groove 61 and the mounting stepped groove 14 form a first cylindrical hole 62 and a second cylindrical hole 63 that are axially connected. The end of the positioning rod 2 is provided with a first cylindrical portion 24 having the first fitting surface 21 and a second cylindrical portion 25 having the second fitting surface 22 . The first cylindrical portion 24 is disposed in the first cylindrical hole 62 , and the second cylindrical portion 25 is disposed in the second cylindrical hole 63 .

[0029] In this embodiment, the first positioning cylindrical surface, the second positioning cylindrical surface and the first fitting surface are all cylindrical surfaces with a central angle less than 90 degrees, the second positioning cylindrical surface is circumscribed to the first positioning cylindrical surface, and the second fitting surface is an arched surface. The central angle of the first fitting surface is less than 90 degrees, and the second fitting surface is an arched surface, so that the pressing member 6 can radially press the positioning rod or the strain sensor, which is convenient for installation and use.

[0030] In this embodiment, the precision tooling 3 includes a clamping seat 31 and a tension bolt 32, and both ends of the strain sensor 4 are clamped by the clamping seat 31; the strain sensor includes a middle measuring section and clamping sections at both ends of the measuring section, and the clamping seat 31 clamps the clamping section of the strain sensor, and ensures that a clamping section of sufficient length is still retained near the measuring section, so that during installation, the clamping section close to the measuring section can be fitted with the first positioning cylindrical surface.

[0031] The clamping seat 31 has a through hole, and the stretching bolt 32 passes through the through holes at both ends of the strain sensor 4 in sequence. A first nut 33 and a second nut 34 sleeved on the stretching bolt 32 are provided between the two clamping seats 31. The first nut 33 and the bolt head of the stretching bolt 32 clamp the clamping seat 31 at one end of the strain sensor 4, and the second nut 34 abuts against the clamping seat 31 at the other end of the strain sensor 4.

[0032] By rotating the second nut 34, the two clamping seats 31 can be moved away from each other, so that the strain sensor gradually receives tensile stress. By reading the strain sensor status data in real time through the data collector, the strain sensor can be accurately placed in the set stress value state.

[0033] In this embodiment, there are two tension bolts 32, which are disposed on both sides of the strain sensor 4. The tension bolts on both sides can make the strain sensor more balanced in force, which is conducive to ensuring installation accuracy.

[0034] This embodiment also discloses a method for installing an offshore platform strain sensor, comprising the following steps: S1. The first fitting surfaces at both ends of the positioning rod are respectively fitted with the first positioning cylindrical surfaces of the two mounting seats and kept in a fitting state, and the second fitting surfaces at both ends of the positioning rod are respectively fitted with the second positioning cylindrical surfaces of the two mounting seats and kept in a fitting state; in this embodiment, the clamping member is installed on the mounting seat by bolts, and the fitting surfaces at both ends of the positioning rod are kept in a fitting state with the positioning cylindrical surfaces of the positioning seat by the clamping member; S2, placing the mounting seat at the position to be installed on the catheter rack, so that the third positioning cylinder surfaces of the two mounting seats are in contact with the catheter rack; S3, fixing the two mounting seats on the catheter frame; in this embodiment, the mounting seats are welded to the catheter frame; S4, removing the positioning rod; S5, placing the strain sensor clamped by the precision tooling between the two mounting seats, so that both ends of the strain sensor are in contact with the first positioning cylindrical surface; S6, fixing the two ends of the strain sensor on the first positioning cylindrical surfaces of the two mounting seats respectively; S7. Dismantle the precision tooling.

[0035] Specifically, S1 also includes connecting the pressing member to the mounting seat by bolts, so that the relative positions of the positioning rod and the mounting seat are kept fixed, and the third positioning surfaces of the mounting seats at both ends are coplanar.

[0036] The first columnar portion and the second columnar portion at the end of the positioning rod are installed in the mounting step groove, so that the second abutting surface between the first columnar portion and the second columnar portion abuts against the first abutting surface in the mounting step groove.

[0037] S5 also includes clamping the two ends of the strain sensor by two clamping seats of the precision tooling respectively; Pass the tension bolts through the through holes of the clamping seats at both ends in sequence; Rotate the first nut disposed between the clamping seats at both ends so that the first nut and the bolt head of the tension bolt clamp the clamping seat at one end; Rotate the second nut disposed between the clamping seats at both ends so that the second nut abuts against the clamping seat at the other end; Rotate the second nut to move the two clamping seats away from each other, and monitor the state of the strain sensor at the same time; When the state of the strain sensor reaches a preset value, the rotation of the second nut is stopped and the strain sensor is in a state to be installed.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An installation structure for an offshore platform strain sensor, characterized in that: include: A mounting seat (1), a positioning rod (2) and a precision tooling (3); The mounting seat (1) comprises a first positioning cylindrical surface (11), a second positioning cylindrical surface (12) and a third positioning cylindrical surface (13) whose axes are parallel to each other; both ends of the positioning rod (2) are provided with a first fitting surface (21) and a second fitting surface (22); the first fitting surface (21) can fit with the first positioning cylindrical surface (11), and the second fitting surface (22) can fit with the second positioning cylindrical surface (12); the third positioning cylindrical surface (13) fits with the catheter frame (5); The precision tooling (3) is capable of clamping two ends of the strain sensor (4) so ​​that the strain sensor (4) remains in a state to be installed; Two ends of the strain sensor (4) are respectively mounted on two first positioning cylindrical surfaces (11).

2. The installation structure of an offshore platform strain sensor according to claim 1, characterized in that: It also comprises a pressing piece (6), which is mounted on the mounting seat (1) by means of bolts and presses the positioning rod (2) or the strain sensor (4) onto the first positioning cylindrical surface (11).

3. The installation structure of an offshore platform strain sensor according to claim 1, characterized in that: The mounting seat (1) has a mounting step groove (14); The first positioning cylindrical surface (11) and the second positioning cylindrical surface (12) constitute the inner surface of the mounting stepped groove (14); a first abutting surface (15) perpendicular to the axis of the first positioning cylindrical surface (11) is provided between the first positioning cylindrical surface (11) and the second positioning cylindrical surface (12); a second abutting surface (23) is provided between the first fitting surface (21) and the second fitting surface (22); the first abutting surface (15) and the second abutting surface (23) abut against each other.

4. The installation structure of an offshore platform strain sensor according to claim 3, characterized in that: It also comprises a pressing piece (6), the pressing piece (6) having a pressing stepped groove (61), and when the pressing piece (6) is mounted on the mounting seat (1), the pressing stepped groove (61) and the mounting stepped groove (14) form a first cylindrical hole (62) and a second cylindrical hole (63) which are axially connected; The end of the positioning rod (2) is provided with a first cylindrical portion (24) having the first fitting surface (21) and a second cylindrical portion (25) having the second fitting surface (22); the first cylindrical portion (24) is arranged in the first cylindrical hole (62), and the second cylindrical portion (25) is arranged in the second cylindrical hole (63).

5. The installation structure of an offshore platform strain sensor according to claim 1, characterized in that: The precision tooling (3) comprises a clamping seat (31) and a tension bolt (32), both ends of the strain sensor (4) are clamped by the clamping seat (31), the clamping seat (31) has a through hole, the tension bolt (32) passes through the through holes at both ends of the strain sensor (4) in sequence, a first nut (33) and a second nut (34) sleeved on the tension bolt (32) are provided between the two clamping seats (31), the first nut (33) and the bolt head of the tension bolt (32) clamp the clamping seat (31) at one end of the strain sensor (4), and the second nut (34) abuts against the clamping seat (31) at the other end of the strain sensor (4).

6. The installation structure of an offshore platform strain sensor according to claim 5, characterized in that: There are two tension bolts (32) in total, and the two tension bolts (32) are respectively disposed on two sides of the strain sensor (4).

7. A method for installing a marine platform strain sensor using the installation structure of any one of claims 1 to 6, characterized in that: The following steps are involved: S1, fit the first fitting surfaces at both ends of the positioning rod to the first positioning cylindrical surfaces of the two mounting seats respectively, and keep the fit state, fit the second fitting surfaces at both ends of the positioning rod to the second positioning cylindrical surfaces of the two mounting seats respectively, and keep the fit state; S2, placing the mounting seat at the position to be installed on the catheter rack, so that the third positioning cylinder surfaces of the two mounting seats are in contact with the catheter rack; S3, fixing the two mounting seats on the catheter frame; S4, removing the positioning rod; S5, placing the strain sensor clamped by the precision tooling between the two mounting seats, so that both ends of the strain sensor are in contact with the first positioning cylindrical surface; S6, fixing the two ends of the strain sensor on the first positioning cylindrical surfaces of the two mounting seats respectively; S7. Dismantle the precision tooling.

8. The method for installing an offshore platform strain sensor according to claim 7, characterized in that: S1 also includes connecting the pressing member to the mounting seat by bolts, so that the relative positions of the positioning rod and the mounting seat are kept fixed, and the third positioning surfaces of the mounting seats at both ends are coplanar.

9. The method for installing an offshore platform strain sensor according to claim 8, characterized in that: The first columnar portion and the second columnar portion at the end of the positioning rod are installed in the mounting step groove, so that the second abutting surface between the first columnar portion and the second columnar portion abuts against the first abutting surface in the mounting step groove.

10. The method for installing an offshore platform strain sensor according to claim 7, characterized in that: S5 also includes clamping the two ends of the strain sensor by two clamping seats of the precision tooling respectively; Pass the tension bolts through the through holes of the clamping seats at both ends in sequence; Rotate the first nut disposed between the clamping seats at both ends so that the first nut and the bolt head of the tension bolt clamp the clamping seat at one end; Rotate the second nut disposed between the clamping seats at both ends so that the second nut abuts against the clamping seat at the other end; Rotating the second nut to move the two clamping seats away from each other, and monitoring the state of the strain sensor at the same time; When the state of the strain sensor reaches a preset value, the rotation of the second nut is stopped and the strain sensor is in a state to be installed.

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