A novel marking device for pipeline cutting under emergency conditions

Abstract

The present invention belongs to the technical field of pipeline measurement, and particularly relates to a novel scribing device for pipeline blanking under emergency conditions, including a tensioning structure, a centering angle deflection structure, a telescopic measurement structure, and a scribing structure. The tensioning structure includes a screw rod, which is matched with a motor. A screw sleeve is installed on the screw rod and is connected to a connecting rod through the screw sleeve. The other end of the connecting rod is connected to a cylinder wall fixing plate. The centering angle deflection structure includes a centering disk, a fixing ring, and a fixing base. Both the centering disk and the fixing ring can rotate. The telescopic measurement structure includes a telescopic rod, a telescopic thin rod, and a sleeve. There are scales on the telescopic thin rod to display the length. The scribing structure includes a sliding sleeve, a bracket, and a scribing pen. The entire scribing structure is installed on the telescopic structure to scribe on the pipe section that needs to be cut and replaced. The present invention provides a novel scribing device for pipeline blanking under emergency conditions.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipeline measurement, and particularly relates to a novel scribing device for pipeline blanking under emergency conditions. Background Art

[0002] The pipeline dead-end blanking technology originated from the closed connection of pipelines during the construction of medium and long-distance pipelines. During pipeline construction, dead-end blanking is a difficult point in the work. Operations such as short-section blanking and connecting, welding valve replacement, and pipeline segment replacement due to pipeline defects require high technical quality and short operation time. During the construction process, workers need to complete the blanking and docking operations through repeated measurements and calculations.

[0003] In the prior art, during the blanking operation, workers need to repeatedly measure at both ends of the pipeline to be connected. When scribing the pipeline after the measurement is completed, a pen controlled by a rope is mostly used for pipeline scribing. Moreover, it is impossible to accurately ensure finding the center of the pipeline, resulting in a further increase in errors. Or it is impossible to ensure that the scribed cross-sections at both ends are parallel. The existence of these errors will greatly extend the welding process time.

[0004] It can be seen that there is a problem of large measurement errors in the pipeline blanking and docking operation in the prior art. Summary of the Invention

[0005] To solve the above problems, the present invention provides a novel scribing device for pipeline blanking under emergency conditions, and the present invention is realized through the following technical solutions.

[0006] A novel scribing device for pipeline blanking under emergency conditions includes a positioning mechanism and a scribing mechanism. The positioning mechanism is provided with a motor and a housing, and the motor is installed on one side of the housing. The output shaft of the motor is connected to a screw rod, and a connecting rod is connected to the screw rod. A cylinder wall fixing plate is connected to the connecting rod. Both ends of the screw rod are installed on the housing. The scribing mechanism is provided with a centering disc, a fixed ring, a telescopic rod, and a rotating cylinder. The centering disc is installed on the fixed ring, the telescopic rod is installed on the centering disc, and the rotating cylinder is installed on the telescopic rod.

[0007] Further, spiral sleeves and fixed boundaries are respectively sleeved at both ends of the screw rod. The spiral sleeves are in threaded cooperation with the screw rod, and the fixed boundaries are rotatably connected to the screw rod. One ends of the two connecting rods are respectively hinged to the spiral sleeves and the fixed boundaries through rotating components, and the other ends of the two connecting rods are both hinged to the cylinder wall fixing plate.

[0008] Further, the rotating component is provided with a bolt and a nut, and the nut is fixedly sleeved on one end of the bolt.

[0009] Further, a sliding groove is formed on the outer surface of the housing, and the connecting rod passes through the sliding groove and is movably connected to the housing.

[0010] Further, a ring groove is fixedly connected to the top of the centering disc. A ring groove connection hole is formed inside the ring groove. Two centering disc rotating shafts are fixedly connected to the outer surface of the centering disc. The centering disc is rotatably connected to the fixed ring through the two centering disc rotating shafts. Two fixed ring rotating shafts are fixedly connected to the outer surface of the fixed ring. Both of the two fixed ring rotating shafts are connected to a fixed base in a rotating manner, and both of the two fixed bases are fixedly connected to the housing.

[0011] Further, a telescopic thin rod is installed inside the telescopic rod. The other end of the telescopic thin rod is movably connected to a sliding sleeve, and the outer diameter of the sliding sleeve is the same as that of the telescopic rod.

[0012] Further, a bracket rotating shaft is installed on the outer surface of the rotating cylinder. A bracket is installed at the top of the bracket rotating shaft. A marking pen telescopic sleeve is installed at one end of the bracket away from the bracket rotating shaft, and a marking pen is installed inside the marking pen telescopic sleeve.

[0013] Advantages of the present invention:

[0014] To realize the fixation of the novel marking device inside the pipeline, a telescopic tensioning and fixing structure is provided inside the novel marking device. The center of this structure is a slender threaded rod for transmission, and this threaded rod realizes the rotation function driven by a motor. A threaded sleeve is arranged on this threaded rod, and the threaded sleeve is in threaded cooperation with this threaded rod. Through the rotation of this threaded rod, the axial movement of the threaded sleeve on this threaded rod can be realized. One end of this threaded rod is connected to the motor, and this motor is used for the rotation of this threaded rod. The other end of this threaded rod is connected to the boundary of the tensioning and fixing structure. Link connection structures are arranged on both the threaded sleeve and the boundary. The link connection structure can connect a connecting rod, and the connecting rod can rotate through this link connection structure. The threaded sleeve and the boundary are each connected to a connecting rod through the link connection structure. The other ends of these two connecting rods are both connected to the cylinder wall fixing plate through the same structure as the link connection structure. The connecting rod can rotate with the cylinder wall fixing plate through this structure. A sliding groove is arranged on the outer cylindrical wall of the tensioning and fixing structure. Through this sliding groove, the threaded sleeve can only displace and not rotate when the threaded rod rotates.

[0015] To achieve precise alignment of the new scribing device at both ends of the pipeline, a centering angle deflection structure is provided at the front end of the new scribing device. The center of the centering angle deflection structure is a centering disk. The center of the centering disk is connected to an annular groove. The center line of the annular groove passes through the center of the centering disk and is perpendicular to the end face of the centering disk. The annular groove can insert a telescopic straight rod, and both ends of the telescopic straight rod are respectively inserted into the annular grooves of the centering disks of the new scribing device inside both ends of the pipeline. A centering disk rotation structure is provided on the annular end face of the centering disk. The rotation axis of the centering disk rotation structure passes through the center of the centering disk. The centering disk is connected to a fixed ring through the centering disk rotation structure. There is a fixed ring rotation structure on the fixed ring. The rotation axis of the fixed ring rotation structure and the rotation axis of the centering disk rotation structure are in the same plane and perpendicular to each other.

[0016] To achieve scribing of the welding trajectory on the outer wall of the pipeline, a trajectory scribing structure is provided. This structure is installed on the telescopic thin rod through a rotating cylinder. The rotating cylinder can perform axial displacement or rotation on the telescopic thin rod. The rotating cylinder is connected to a scribing bracket, and the scribing bracket can rotate 360 degrees on the rotating cylinder. The other end of the rotating bracket is connected to a scribing pen, and the scribing pen can achieve axial expansion and contraction through a scribing expansion and contraction structure. The plane where the scribing trajectory is located passes through the center of the centering disk.

[0017] To measure the distance between two parallel cross-sections of the scribing, by calibrating scales on the telescopic straight rod, when the telescopic straight rod is installed, the straight-line distance between the parallel cross-sections of the welding trajectory scribing can be obtained. Description of the Drawings

[0018] To more clearly illustrate the technical solutions of the present invention, the following will briefly introduce the drawings required for use in the description of the specific implementation manners. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 : Overall structural schematic diagram of the new scribing device for pipeline blanking under emergency conditions described in the present invention;

[0020] Figure 2 : Front view of the internal tensioning structure of the present invention;

[0021] Figure 3 : Structural schematic diagram of the internal tensioning structure of the present invention;

[0022] Figure 4 : Three-dimensional schematic of the internal tensioning structure of the present invention Figure 1 ;

[0023] Figure 5:Three-dimensional schematic of the internal tensioning structure of the present invention Figure 2 ;

[0024] Figure 6 :Connection schematic of the telescopic rod, sliding sleeve and telescopic thin rod of the present invention;

[0025] Figure 7 :Connection schematic of the rotating cylinder and the marking pen of the present invention.

[0026] Reference numerals are as follows:

[0027] 1. Motor;

[0028] 2. Screw rod; 21. Screw sleeve; 22. Fixed boundary; 23. Bolt; 24. Nut;

[0029] 3. Connecting rod;

[0030] 4. Cylinder wall fixing plate;

[0031] 5. Outer shell; 51. Sliding groove;

[0032] 6. Centering disk; 61. Annular groove; 62. Annular groove connection hole; 63. Centering disk rotating shaft;

[0033] 7. Fixed ring; 71. Fixed ring rotating shaft; 72. Fixed base;

[0034] 8. Telescopic rod; 81. Sliding sleeve; 82. Telescopic thin rod;

[0035] 9. Rotating cylinder; 91. Bracket; 92. Bracket rotating shaft; 93. Marking pen; 94. Marking pen telescopic sleeve. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] As Figures 1-7 shown, the present invention has the following specific embodiments.

[0038] Embodiment:

[0039] A new type of marking device for pipeline cutting under emergency conditions, including a positioning mechanism and a marking mechanism. The positioning mechanism is provided with a motor 1 and a housing 5, and the motor 1 is installed on one side of the housing 5. The output shaft of the motor 1 is connected to a screw rod 2, a connecting rod 3 is connected to the screw rod 2, a cylinder wall fixing plate 4 is connected to the connecting rod 3, and both ends of the screw rod 2 are installed on the housing 5. The marking mechanism is provided with a centering disc 6, a fixing ring 7, a telescopic rod 8, and a rotating cylinder 9. The centering disc 6 is installed on the fixing ring 7, the telescopic rod 8 is installed on the centering disc 6, and the rotating cylinder 9 is installed on the telescopic rod 8.

[0040] By adopting the above technical solution, first, the new type of marking device is placed inside the pipe section that needs to be cut and replaced. The motor 1 is started to drive the screw rod 2 to rotate. The rotation of the screw rod 2 drives the rotation of the connecting rod 3, and then the cylinder wall fixing plate 4 moves up and down, and the cylinder wall fixing plate 4 tightly adheres to the inner wall of the pipe section that needs to be cut and replaced. The motor 1 stops rotating, and the new type of marking device is fixed inside the pipe section that needs to be cut and replaced. The centering disc 6 is installed on the fixing ring 7, and both the centering disc 6 and the fixing ring 7 can rotate freely. The rotation axes are in the same plane and perpendicular to each other, and the center of the centering disc 6 always remains stationary. The telescopic rod 8 is installed on the centering disc 6 to achieve the centering of the two new type of marking devices on the left and right, and the two centering discs 6 are parallel to each other. The rotating cylinder 9 is installed on the telescopic rod 8. By rotating the rotating cylinder 9 for one week, the cutting trajectory that needs to be cut is drawn on the outer wall of the pipe section that needs to be cut and replaced. The cutting trajectory is in the same plane as the center of the centering disc 6, the telescopic rod 8 is perpendicular to the cutting trajectory plane, and the cutting trajectory planes of the left and right are parallel to each other. Thus, the new type of marking device completes the marking of the pipe section that needs to be cut and replaced.

[0041] Specifically, as Figure 3 shown, both ends of the screw rod 2 are installed on the housing 5. The screw rod 2 rotates inside the housing 5 driven by the motor 1. A screw sleeve 21 is installed on the screw rod 2, and the screw sleeve 21 is in threaded cooperation with the screw rod 2. One ends of the two connecting rods 3 are respectively hinged with the screw sleeve 21 and the fixed boundary 22, and the other ends of the connecting rods 3 are hinged with the cylinder wall fixing plate 4. The connecting rod 3 passes through the sliding slot 51 on the housing 5.

[0042] The screw sleeve 21 and the connecting rod 3 can only rotate relative to each other in a fixed plane due to the hinge cooperation. The connecting rod 3 can only move in a fixed plane due to the constraint of the sliding slot 51. When the screw rod 2 rotates, the screw sleeve 21 only undergoes axial displacement on the screw rod relative to the housing 5.

[0043] When the screw rod 2 rotates, the spiral sleeve 21 undergoes axial displacement. Since the connecting rod 3 is hinged with the spiral sleeve 21, a relative displacement with the spiral sleeve 21 occurs. Because the cylinder wall fixing plate 4 is hinged with the connecting rod 3, a relative movement away from the screw rod 2 occurs. The cylinder wall fixing plate 4 closely adheres to the inner wall of the pipe section that needs to be cut and replaced, completing the fixation of the new type of scribing device.

[0044] Specifically, as Figure 4 shown, there is an annular groove 61 on the centering disc 6. Inside the annular groove 61, there is an annular groove connection hole 62. The centering disc rotating shaft 63 is installed on the fixed ring 7. The centering disc 6 can rotate relative to the fixed ring 7. The axis of rotation is the axis of the centering disc rotating shaft 63. A fixed ring rotating shaft 71 is installed on the fixed ring 7. The fixed ring rotating shaft 71 is installed on the fixed base 72. The fixed ring 7 can rotate relative to the fixed base 72. The axis of rotation is the axis of the fixed ring rotating shaft 71. The axes of the centering disc rotating shaft 63 and the fixed ring rotating shaft 71 are in the same plane and perpendicular to each other, and this plane passes through the center of the centering disc 6.

[0045] Specifically, as Figure 6 shown, a telescopic thin rod 82 is installed inside the telescopic rod 8. The telescopic thin rod 82 can have an axial displacement relative to the telescopic rod 8, realizing the elongation and shortening of the telescopic straight rod. A sliding sleeve 81 is installed on the telescopic thin rod 82. The outer diameter of the sliding sleeve 81 is the same as the outer diameter of the telescopic rod 8. The sliding sleeve 81 can axially slide on the telescopic thin rod 82. During use, the left end face of the telescopic rod 8 is inserted into the bottom of the annular groove 61, and the right end face of the telescopic rod 8 is inserted into the bottom of the annular groove 61. At this time, the length of the telescopic straight rod is the distance between the scribing parallel cross-sections.

[0046] Specifically, as Figure 7 shown, a bracket rotating shaft 92 is installed on the rotating cylinder 9. A bracket 91 is installed on the bracket rotating shaft 92. A scribing pen telescopic sleeve 94 is installed on the bracket 91. A scribing pen 93 is installed on the scribing pen telescopic sleeve 94. The scribing pen 93 can have an axial displacement relative to the scribing pen telescopic sleeve 94 to realize the telescopic function of the scribing pen 93.

[0047] The rotating cylinder 9 is installed on the telescopic rod 8. The rotating cylinder 9 and the telescopic rod 8 can have axial displacement and rotation. The left end face of the rotating cylinder 9 is in contact with the right end face of the annular groove 61, ensuring that the scribing pen 93 and the center of the centering disc 6 are in the same plane. The rotating cylinder 9 rotates around the telescopic rod 8 for one week to realize scribing on the pipe section that needs to be cut and replaced.

[0048] The outer diameter of the sliding sleeve 81 is the same as that of the telescopic rod 8. The left end face of the sliding sleeve 81 is in contact with the right end face of the telescopic rod 8. The rotating cylinder 9 is axially moved on the telescopic rod 8 to complete the fit with the sliding sleeve 81. The right end face of the rotating cylinder 9 is in contact with the left end face of the stepped shaft on the sliding sleeve 81, and the right end face of the stepped shaft on the sliding sleeve 81 is in contact with the left end face of the stepped shaft on the telescopic rod 8. The bracket 91 is rotated 180 degrees through the bracket rotating shaft 92. At this time, the scribing pen 93 and the center of the centering disk 6 of the new scribing device at the right end are in the same plane. The rotating cylinder 9 rotates one week around the sliding sleeve 81 to complete the scribing on the pipe section that needs to be cut and replaced at the right end.

[0049] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific embodiments. Obviously, according to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art in the relevant technical field can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A new marking device for pipeline unloading under emergency conditions, including a positioning mechanism and a marking mechanism, Features: The positioning mechanism is provided with a motor (1) and a housing (5), and the motor (1) is mounted on one side of the housing (5); the output shaft of the motor (1) is connected to a screw rod (2); the screw rod (2) is connected to a connecting rod (3); the connecting rod (3) is connected to a cylinder wall fixing plate (4); both ends of the screw rod (2) are mounted on the housing (5); the marking mechanism is provided with a centering disk (6), a fixing ring (7), a telescopic rod (8), and a rotating cylinder (9); the centering disk (6) is mounted on the fixing ring (7); the telescopic rod (8) is mounted on the centering disk (6); and the rotating cylinder (9) is mounted on the telescopic rod (8); The top of the centering disk (6) is fixedly connected with an annular groove (61), and an annular groove connecting hole (62) is opened inside the annular groove (61). The outer surface of the centering disk (6) is fixedly connected with two centering disk rotating shafts (63). The centering disk (6) is rotatably connected to the fixed ring (7) through the two centering disk rotating shafts (63). The outer surface of the fixed ring (7) is fixedly connected with two fixed ring rotating shafts (71). Both of the two fixed ring rotating shafts (71) are connected with fixed bases (72), and both of the two fixed bases (72) are fixedly connected to the outer shell (5).

2. A new marking device for pipeline unloading under emergency conditions according to claim 1, Features: The two ends of the spiral rod (2) are respectively sleeved with a spiral sleeve (21) and a fixed boundary (22); the spiral sleeve (21) is threadedly matched with the spiral rod (2); the fixed boundary (22) is rotationally connected with the spiral rod (2); one end of the two connecting rods (3) is respectively hinged with the spiral sleeve (21) and the fixed boundary (22) through a rotating assembly; the other ends of the two connecting rods (3) are hinged on the cylinder wall fixing plate (4).

3. A new marking device for pipeline unloading under emergency conditions according to claim 2, Features: The rotating assembly is provided with a bolt (23) and a nut (24), and the nut (24) is fixedly sleeved on one end of the bolt (23).

4. A new marking device for pipeline unloading under emergency conditions according to claim 1, Features: The outer surface of the shell (5) is provided with a sliding groove (51), and the connecting rod (3) passes through the sliding groove (51) and is movably connected to the shell (5).

5. A new marking device for pipeline unloading under emergency conditions according to claim 1, Features: A telescopic thin rod (82) is installed inside the telescopic rod (8), and the other end of the telescopic thin rod (82) is movably connected to a sliding sleeve (81), and the outer diameter of the sliding sleeve (81) is consistent with the outer diameter of the telescopic rod (8).

6. A new marking device for pipeline unloading under emergency conditions according to claim 1, Features: A support rotating shaft (92) is installed on the outer surface of the rotating cylinder (9). A support (91) is installed at the top of the support rotating shaft (92). A scribing pen telescopic sleeve (94) is installed at one end of the support (91) away from the support rotating shaft (92). A scribing pen (93) is installed inside the scribing pen telescopic sleeve (94).

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