Secondary pre-splicing jig frame of steel leaning tower and space attitude adjusting method

Abstract

The invention relates to the technical field of steel leaning tower construction, in particular to a secondary pre-splicing jig frame of a steel leaning tower and a space posture adjusting method, and the space posture adjusting method comprises the following steps: obtaining the inclination direction and the inclination angle of a large section according to finished bridge line type theoretical data, and calculating the theoretical length of a lifting appliance according to the position of a connecting point of the lifting appliance and the large section; the jig frame is assembled according to the inclination direction and the inclination angle of the large section to be installed; assembling the plurality of small sections on the jig frame to form the large section; lifting the large section away from the jig frame by using a lifting appliance, measuring the inclination direction and the inclination angle of the large section, and if the inclination direction and the inclination angle of the large section have deviations from theoretical data, adjusting the lifting appliance until the inclination direction and the inclination angle of the large section are consistent with theories; and the large section is hoisted to the tower top and welded. According to the method, the large section is adjusted twice, so that the spatial attitude of the large section is consistent with the theory, and great convenience is provided for subsequent air installation.

Description

Technical Field

[0001] The invention relates to the technical field of steel inclined tower construction, and in particular to a secondary pre-assembled frame and a spatial posture adjustment method of a steel inclined tower. Background Art

[0002] Conventional cable towers are all straight towers, which are relatively convenient for pre-assembly, lifting and installation, and adjustment. They only need to be horizontally matched (or vertically matched) in the factory, and then they can be transported to the bridge location for direct lifting and installation. The processes of lifting and installation, adjustment, and connection with installed segments can all be completed quickly. However, the construction processes of torsion and tilting steel towers are relatively complicated, and the installation of conventional small segments will lead to cumulative errors, and linear control is extremely difficult, especially for spatial torsion steel inclined towers. Summary of the invention

[0003] The purpose of the present invention is to address the defects of the prior art and provide a secondary pre-assembly tire frame and spatial posture adjustment method for a steel inclined tower. By performing secondary pre-assembly of small segments on the tire frame, the large segment can complete preliminary posture adjustment on the tire frame. Subsequently, the large segment can be accurately adjusted by a hoist to ensure that the spatial posture of the large segment is consistent with the theory, which provides great convenience for subsequent aerial installation.

[0004] In order to solve the above technical problems, in a first aspect, the present invention provides a method for adjusting the spatial posture of a steel inclined tower, comprising:

[0005] According to the theoretical data of the bridge line type, the inclination direction and inclination angle of the large segment are obtained, and the theoretical length of the hanger is calculated according to the position of the connection point between the hanger and the large segment;

[0006] Assemble the tire frame according to the inclination direction and inclination angle of the large segment to be installed;

[0007] Assembling a plurality of small segments on a tire frame to form the large segment;

[0008] Use a sling to lift the large segment off the tire frame, and measure the tilt direction and tilt angle of the large segment. If the tilt direction and tilt angle of the large segment deviate from the theoretical data, adjust the sling until the tilt direction and tilt angle of the large segment are consistent with the theoretical data;

[0009] The large segments are hoisted to the top of the tower and welded.

[0010] In some embodiments, a method for adjusting a sling until the tilt direction and tilt angle of a large section are consistent with the theory includes: the sling includes multiple groups of hydraulic cylinders and lifting ropes, the length of each sling is calculated, and for a sling that is not equal to the theoretical length, its hydraulic cylinder is adjusted so that its length is equal to the theoretical length, and the tilt direction and tilt angle of the large section are measured again. If there is still a deviation, the length of a hydraulic cylinder or multiple hydraulic cylinders is fine-tuned according to the deviation between the tilt direction and tilt angle of the large section and the theoretical data, so that the tilt direction and tilt angle of the large section are consistent with the theory.

[0011] In some embodiments, the method for assembling the tire frame includes: welding one ends of multiple main beam units together so that the other ends of the multiple main beam units extend radially outward, connecting the two ends of the connecting beam to two adjacent main beam units, thereby connecting all the main beam units into one, calculating the height of each pad according to the inclination direction and inclination angle of the large section to be installed and the fixed position of each pad on the main beam, installing each pad on the main beam, and completing the assembly of the tire frame.

[0012] In some embodiments, the method of assembling a plurality of small segments on a tire frame includes:

[0013] The large segment comprises n small segments. The first small segment is hoisted onto the tire frame and fixed firmly, and then the second small segment is hoisted. After the first small segment and the second small segment are matched and aligned, the circumferential weld is welded. The same method is used to hoist and weld the subsequent other small segments.

[0014] In some embodiments, before the large segment is lifted off the tire frame by the lifting device, the tilt direction and tilt angle of the large segment are first measured, and when the difference with the theoretical value is within a preset difference range, the large segment is lifted off the tire frame.

[0015] In some embodiments, the large segment is lifted a certain distance away from the tire frame by a lifting device, and then the tilt direction and tilt angle of the large segment are measured after the lifting device is maintained for a period of time.

[0016] In a second aspect, the present invention provides a secondary pre-assembly frame for a steel inclined tower, comprising a frame, wherein the frame comprises a base frame and a plurality of pads, wherein the plurality of pads are vertically arranged on the base frame, and wherein the heights of the plurality of pads are determined according to a theoretical inclination direction and a theoretical inclination angle of a large segment currently to be installed, so that the inclination direction and the inclination angle of the large segment currently to be installed after being assembled on the frame are respectively equal to the theoretical inclination direction and the theoretical inclination angle.

[0017] In some embodiments, the base frame includes a main beam and a connecting beam, the main beam includes multiple main beam units, one end of the multiple main beam units is fixedly connected, and the other end of the multiple main beam units extends radially outward, and the connecting beam is used to connect the multiple main beam units.

[0018] In some embodiments, the pad is fixedly arranged on the main beam.

[0019] In some embodiments, the included angles between any two adjacent main beam units are equal.

[0020] In some embodiments, the pad is detachably connected to the main beam.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention pre-assembles the small segments on the tire frame for a second time, so that the large segments complete the initial posture adjustment on the tire frame. The large segments are then precisely adjusted by the sling to ensure that the spatial posture of the large segments is consistent with the theory, which provides great convenience for subsequent aerial installation. It not only solves the transportation problem, but also reduces the risk of high-altitude operations. The large segments can be welded after being simply aligned with the tower top in the air, and the ground construction is extremely convenient, which greatly reduces the construction difficulty of the processes such as matching and alignment between segments, linear adjustment, measurement and verification, welding connection, and monitoring. In addition, multiple sets of tire frames can be set up on the ground for simultaneous pre-assembly work, turning a single working surface in the air into multiple working surfaces on the ground, greatly improving the installation efficiency and reducing the installation time.

[0023] 2. When the present invention uses a sling to adjust the inclination direction and inclination angle of a large section, the length of each sling can be adjusted first to be equal to the theoretical length of the sling. If the requirements are still not met, the sling can be fine-tuned to make the inclination direction and inclination angle of the large section consistent with the theory.

[0024] 3. The present invention solves the problem of inconvenient transportation of large segments by decomposing the large segment into multiple small segments and assembling them on a tire frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A top view of a tire frame of the present invention;

[0026] Figure 2 It is a schematic diagram of the structure when the large segment of the present invention is installed on the tire frame;

[0027] Figure 3 It is a schematic diagram of the structure of the present invention when hoisting a large segment.

[0028] Figure numerals: main beam 1; outer ring connecting beam 2; inner ring connecting beam 3; pad 4; tire frame 5; first small section 6; second small section 7; third small section 8; large section 9; hydraulic cylinder 10; lifting rope 11. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] like Figure 1 As shown, the present invention provides a secondary pre-assembly frame of a steel inclined tower, including a frame 5, the frame 5 including a base frame and a plurality of pads 4, the plurality of pads 4 are vertically arranged on the base frame, and the heights of the plurality of pads 4 are determined according to the theoretical inclination direction and theoretical inclination angle of the large segment 9 to be installed currently, so that the inclination direction and inclination angle of the large segment 9 to be installed currently after being assembled on the frame 5 are respectively equal to the theoretical inclination direction and theoretical inclination angle.

[0031] The tire frame 5 is provided with a plurality of pads 4, so that after the large segment 9 is assembled on the tire frame 5, its spatial posture is the same as or not much different from the theoretical spatial posture, and the preliminary adjustment of the spatial posture (tilt direction and tilt angle) of the large segment 9 can be achieved. In addition, the tire frame 5 is on the ground, and the ground construction is extremely convenient, which greatly reduces the construction difficulty of the processes such as matching and alignment between segments, linear adjustment, measurement and verification, welding connection, and monitoring. In addition, multiple sets of tire frames 5 on the ground can be pre-assembled at the same time, turning a single working surface in the air into multiple working surfaces on the ground, greatly improving the installation efficiency and reducing the installation time.

[0032] In some embodiments, the chassis includes a main beam 1 and a connecting beam, the main beam 1 includes a plurality of main beam units, one end of the plurality of main beam units is fixedly connected, and the other end of the plurality of main beam units extends radially outward, and the connecting beam is used to connect the plurality of main beam units, such as Figure 1 As shown, the connecting beams include an outer ring connecting beam 2 and an inner ring connecting beam 3. Multiple main beam units are arranged radially and connected by connecting beams, which ensures the stability of the chassis and prevents the spatial posture of the large segment 9 after being assembled on the tire frame 5 from deviating too much from the theoretical spatial posture.

[0033] Among them, the main beam is H500x300x12x16, and the connecting beam is HW150x150x7x10.

[0034] According to different installation heights, the maximum inclination angle of the large segment on the tire frame 5 can reach 50 degrees. The ground on which the tire frame 5 is placed is hardened and poured with concrete in advance. The structure of the tire frame 5 is heavy, large in area, and has good stability. Moreover, the tire frame 5 only bears vertical downward or oblique downward forces, and the tire frame 5 generally does not move.

[0035] In some embodiments, the pad 4 is fixedly disposed on the main beam 1 .

[0036] In some embodiments, the included angles between any two adjacent main beam units are equal.

[0037] In some embodiments, the shoveling mat 4 is detachably connected to the main beam 1, so that the shoveling mat 4 and the base frame can be recycled, and the shoveling mat 4 and the main beam 1 can be connected by bolts.

[0038] In some embodiments, the pad 4 can be made of steel plates, steel sections, steel pipes or jacks. When a jack is used, the spatial posture of the large segment 9 on the tire frame 5 can be adjusted in real time.

[0039] The present invention provides a method for adjusting the spatial posture of a steel inclined tower, comprising:

[0040] According to the theoretical data of the bridge line type, the inclination direction and inclination angle of the large segment 9 are obtained, and the theoretical length of the sling is calculated according to the position of the connection point between the sling and the large segment 9;

[0041] Assemble the tire frame 5 according to the inclination direction and inclination angle of the large segment 9 to be installed;

[0042] like Figure 2 As shown, a plurality of small segments are assembled on the tire frame 5 to form a large segment 9;

[0043] like Figure 3 As shown, the large segment 9 is lifted off the tire frame 5 by a lifting device, and the tilting direction and tilting angle of the large segment 9 are measured. If the tilting direction and tilting angle of the large segment 9 deviate from the theoretical data, the lifting device is adjusted until the tilting direction and tilting angle of the large segment 9 are consistent with the theoretical data;

[0044] The large segment 9 is hoisted to the top of the tower and welded.

[0045] The present invention pre-assembles the small segments on the tire frame 5 for a second time, so that the large segment 9 completes the initial posture adjustment on the tire frame 5. The large segment 9 is subsequently precisely adjusted by the sling to ensure that the spatial posture of the large segment 9 is consistent with the theory, which provides great convenience for subsequent aerial installation. It not only solves the transportation problem, but also reduces the risk of high-altitude operations. After the large segment 9 is simply aligned with the tower top in the air, it can be welded, and the ground construction is extremely convenient, which greatly reduces the construction difficulty of the processes such as matching and alignment between segments, linear adjustment, measurement and verification, welding connection, and monitoring. In addition, multiple sets of tire frames 5 can be set up on the ground to perform pre-assembly work at the same time, turning a single working surface in the air into multiple working surfaces on the ground, greatly improving the installation efficiency and reducing the installation time.

[0046] In some embodiments, the method of adjusting the sling until the tilt direction and tilt angle of the large segment 9 are consistent with the theory includes: the sling includes multiple groups of hydraulic cylinders 10 and lifting ropes 11, each group includes two lifting ropes 11 and a hydraulic cylinder 10, and the two lifting ropes 11 are respectively connected to the cylinder body and piston rod of the hydraulic cylinder 10, and the length of each sling is calculated. For the sling that is not equal to the theoretical length, its hydraulic cylinder 10 is adjusted so that its length is equal to the theoretical length, and the tilt direction and tilt angle of the large segment 9 are measured again. If there is still a deviation, then according to the deviation of the tilt direction and tilt angle of the large segment 9 from the theoretical data, the length of a hydraulic cylinder 10 or multiple hydraulic cylinders 10 is fine-tuned to make the tilt direction and tilt angle of the large segment 9 consistent with the theory.

[0047] It should be noted that, in general, when the large segment 9 is lifted by the sling, the tilt direction and tilt angle of the large segment 9 should be consistent with the theory. However, due to the error of the tire frame 5 (i.e., the height error of the pad 4 and the horizontal error of the chassis) and the error of the sling length, the tilt direction and tilt angle of the large segment 9 may be inconsistent with the theory. At this time, you can first check whether the length of the sling is equal to the theoretical length of the sling. The length of the sling = the total length of the hydraulic cylinder 10 + the total length of the sling rope 11. When the length of each sling is equal to the theoretical length, the tilt direction and tilt angle of the large segment 9 are consistent with the theoretical length. They should be consistent. If the length of each hoist is equal to the theoretical length, but the tilt direction and tilt angle of the large section 9 are inconsistent with the theory, it may be caused by a change in the extension length of the hydraulic cylinder 10 or an error in the length of the lifting rope 11 after the large section 9 is lifted by the hoist. At this time, the tilt direction and tilt angle of the large section 9 have a small deviation from the theory, and the length of a certain hydraulic cylinder 10 or multiple hydraulic cylinders 10 can be directly fine-tuned to make the tilt direction and tilt angle of the large section 9 consistent with the theory, so that the large section 9 can be quickly aligned and connected to the top of the installed inclined steel tower after lifting.

[0048] In some embodiments, the assembly method of the tire frame 5 includes: welding one ends of multiple main beam units together so that the other ends of the multiple main beam units extend radially outward, connecting the two ends of the connecting beam to two adjacent main beam units, thereby connecting all the main beam units into one, calculating the height of each pad 4 according to the inclination direction and inclination angle of the large segment 9 to be installed and the fixed position of each pad 4 on the main beam 1, installing each pad 4 on the main beam 1, and completing the assembly of the tire frame 5.

[0049] In some embodiments, the method of assembling a plurality of small segments on the tire frame 5 includes:

[0050] The large segment 9 includes n small segments. The first small segment is hoisted onto the tire frame 5. After it is firmly fixed, the second small segment is hoisted. After the first small segment and the second small segment are matched and aligned, the circumferential weld is welded. The same method is used to hoist and weld the subsequent small segments.

[0051] The small segments are assembled into large segments 9 on the tire frame 5 and then installed on the top of the tower, which reduces the risk of high-altitude operations and is extremely convenient for ground construction, greatly reducing the construction difficulty of matching and aligning between segments, line adjustment, measurement and verification, welding connection, monitoring and other processes.

[0052] Figure 2 The diagram shows the situation of three small sections, and the large section 9 includes the first small section 6, the second small section 7, and the third small section 8. Before hoisting the second small section 7, the spatial posture of the first small section 6 can be measured. When the difference between its spatial posture and the theoretical spatial posture is within the preset difference range, the second small section 7 can be directly assembled. Otherwise, the height of the copying pad 4 is adjusted (when the copying pad 4 uses a jack, the lifting height of the jack can be directly adjusted) until the difference between the spatial posture of the first small section 6 and the theoretical spatial posture is within the preset difference range.

[0053] In addition, when the distance from the steel tower manufacturing site to the bridge site is a country road, the steel tower manufacturing plant manufactures small sections of 2-4m in height, transports them to the bridge site via the country road, and finally connects them vertically on site to form large sections 9 of 10-12m in height, thus solving the transportation problem.

[0054] In some embodiments, before the large segment 9 is lifted off the tire frame 5 by the lifting device, the inclination direction and inclination angle of the large segment 9 are first measured. When the difference with the theoretical value is within a preset difference range, the large segment 9 is lifted off the tire frame 5.

[0055] During the assembly of the large segment 9 , the tire frame 5 may move or rotate, resulting in significant changes in the tilt direction and tilt angle of the large segment 9 . Therefore, the tilt direction and tilt angle of the large segment 9 should be checked before the large segment 9 is lifted off the tire frame 5 .

[0056] In some embodiments, the large segment 9 is lifted a certain distance away from the tire frame 5 by a lifting device, and then the tilt direction and tilt angle of the large segment 9 are measured after the lifting device is maintained for a period of time.

[0057] The large segment 9 can be suspended 10-20 cm above the tire frame 5 and maintained for 5-10 minutes to allow the large segment 9 to stabilize and then measure its spatial posture to ensure the accuracy of the measurement result. When the spatial posture of the large segment 9 is significantly different from the theoretical spatial posture, the large segment 9 can be put back on the tire frame 5 and the sling can be checked.

[0058] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for adjusting the spatial posture of a steel inclined tower, characterized in that: include: According to the theoretical data of the bridge line type, the inclination direction and inclination angle of the large segment (9) are obtained, and the theoretical length of the sling is calculated according to the position of the connection point between the sling and the large segment (9); Assembling the tire frame (5) according to the inclination direction and inclination angle of the large segment (9) to be installed; Assembling a plurality of small segments on a tire frame (5) to form the large segment (9); Using a lifting device to lift the large segment (9) off the tire frame (5), measuring the tilting direction and tilting angle of the large segment (9), if the tilting direction and tilting angle of the large segment (9) deviate from theoretical data, adjusting the lifting device until the tilting direction and tilting angle of the large segment (9) are consistent with the theoretical data; The large segment (9) is hoisted to the top of the tower and welded.

2. The method for adjusting the spatial posture of a steel inclined tower according to claim 1, characterized in that: The method for adjusting a sling until the tilt direction and tilt angle of a large section (9) are consistent with the theory comprises: the sling comprises a plurality of groups of hydraulic cylinders (10) and lifting ropes (11), the length of each sling is calculated, and for a sling whose length is not equal to the theoretical length, its hydraulic cylinder (10) is adjusted so that its length is equal to the theoretical length, and the tilt direction and tilt angle of the large section (9) are measured again. If there is still a deviation, the length of a certain hydraulic cylinder (10) or a plurality of hydraulic cylinders (10) is fine-tuned according to the deviation between the tilt direction and tilt angle of the large section (9) and the theoretical data, so that the tilt direction and tilt angle of the large section (9) are consistent with the theory.

3. The method for adjusting the spatial posture of a steel inclined tower according to claim 1 or 2, characterized in that: The method for assembling a tire frame (5) comprises: welding one ends of a plurality of main beam units together so that the other ends of the plurality of main beam units extend radially outward, connecting the two ends of a connecting beam to two adjacent main beam units, thereby connecting all the main beam units into one, calculating the height of each pad (4) according to the inclination direction and inclination angle of a large segment (9) to be installed and the fixed position of each pad (4) on the main beam (1), installing each pad (4) on the main beam (1), and completing the assembly of the tire frame (5).

4. The method for adjusting the spatial posture of a steel inclined tower according to claim 1 or 2, characterized in that: The method for assembling a plurality of small segments on a tire frame (5) comprises: The large segment (9) comprises n small segments. The first small segment is hoisted onto the tire frame (5) and fixed firmly, and then the second small segment is hoisted. After the first small segment and the second small segment are matched and aligned, a circumferential weld is performed. The same method is used to hoist and weld other subsequent small segments.

5. The method for adjusting the spatial posture of a steel inclined tower according to claim 1 or 2, characterized in that: Before the large segment (9) is lifted off the tire frame (5) by using the lifting device, the inclination direction and inclination angle of the large segment (9) are first measured, and when the difference with the theoretical value is within a preset difference range, the large segment (9) is lifted off the tire frame (5).

6. The method for adjusting the spatial posture of a steel inclined tower according to claim 1 or 2, characterized in that: After the large segment (9) is lifted a certain distance away from the tire frame (5) by using a lifting device, the tilting direction and tilting angle of the large segment (9) are measured after the lifting device is maintained for a period of time.

7. A secondary pre-assembled frame for a steel inclined tower, characterized in that: The invention comprises a tire frame (5), wherein the tire frame (5) comprises a base frame and a plurality of copying pads (4), wherein the plurality of copying pads (4) are vertically arranged on the base frame, and the heights of the plurality of copying pads (4) are determined according to the theoretical inclination direction and theoretical inclination angle of the large segment (9) to be installed at present, so that the inclination direction and inclination angle of the large segment (9) to be installed at present are respectively equal to the theoretical inclination direction and theoretical inclination angle after being assembled on the tire frame (5).

8. The secondary pre-assembly frame of the steel inclined tower according to claim 7, characterized in that: The base frame comprises a main beam (1) and a connecting beam, wherein the main beam (1) comprises a plurality of main beam units, one end of the plurality of main beam units are fixedly connected, and the other ends of the plurality of main beam units extend radially outward, and the connecting beam is used to connect the plurality of main beam units.

9. The secondary pre-assembly frame of the steel inclined tower according to claim 8, characterized in that: The cushion (4) is fixedly arranged on the main beam (1).

10. The secondary pre-assembly frame of the steel inclined tower according to claim 9, characterized in that: The cushion (4) is detachably connected to the main beam (1).

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