Swivel spherical hinge structure and experimental method thereof

Abstract

The invention discloses a swivel spherical hinge structure and an experimental method thereof, and particularly relates to the field of swivel bridges, the swivel spherical hinge structure comprises a lower bearing platform, an upper bearing platform and a spherical hinge system, the spherical hinge system is arranged between the lower bearing platform and the upper bearing platform and enables the upper bearing platform to rotate relative to the lower bearing platform, and an annular slide way is mounted on the lower bearing platform; a plurality of groups of supporting legs and sand boxes for supporting the upper bearing platform are arranged on the annular slide way; the upper surface of the annular sliding way is provided with a supporting area right opposite to each set of supporting feet, water-soluble fabric is laid on the supporting areas, and the supporting feet are pressed on the water-soluble fabric. A layer of water-soluble fabric is cushioned between the annular slide way and the supporting leg, so that when the total weight of the beam body acts on the spherical hinge system, a certain gap can still be formed between the supporting leg and the annular slide way, and before the beam body is rotated, water is used for dissolving the water-soluble fabric and vacating the gap, so that when the beam body is rotated, the supporting leg can still be separated from the annular slide way. And the supporting leg cannot rotate normally due to abnormal tightening with the annular slide way.

Description

Technical Field

[0001] The present invention relates to the technical field of swing bridges, and more specifically, to a swing ball hinge structure and an experimental method thereof. Background Art

[0002] The construction method by rotation means that after the cast-in-place beam construction is completed on one side of the railway operation line for the T-shaped rigid frame bridge, during the railway blockade time, the horizontal rotation is completed through the rotation system to reach the designed position. After the rotation is completed, the concrete of the upper and lower turntables is sealed and fixed, and finally the beam body is closed.

[0003] The basic principle of rotation is that the weight of the main beam is transmitted to the upper ball hinge through the pier column, and the upper ball hinge is transmitted to the lower ball hinge and the lower bearing platform through the polytetrafluoroethylene sliding plates between the ball hinges. After the construction of the main beam is completed, the support (hanging basket) is removed, and the sand box is deaerated to transfer the entire weight of the beam body to the ball hinge. Then, weighing and counterweight are carried out, and the traction cable and the continuous rotation jack buried in the upper turntable are used to overcome the dynamic friction torque between the upper and lower ball hinges and between the support feet and the lower slideway, so that the beam body rotates in place.

[0004] However, the rotation structure is prone to tilt due to the influence of construction. Therefore, support feet must be set to prevent tilting. During the construction process, a gap of 3 mm to 6 mm is reserved between the support feet and the lower slideway. When rotating along the slideway under the action of the rotation load, there is a gap, which is convenient for determining the load state and adjusting the rotation attitude.

[0005] However, in the specific construction, it often occurs that after the sand box is deaerated, the support feet and the lower slideway are abnormally tightly pressed and cannot rotate normally, resulting in the shelving of the originally declared railway construction key point plan. It is necessary to re-apply for key points, seriously delaying the construction period. Summary of the Invention

[0006] A swing ball hinge structure and an experimental method thereof provided by the present invention aim to solve the problem that after the sand box is deaerated, the support feet and the lower slideway are abnormally tightly pressed and cannot rotate normally.

[0007] To achieve the above object, the present invention provides the following technical solution: a swing ball hinge structure, including a lower bearing platform, an upper bearing platform and a ball hinge system. The ball hinge system is arranged between the lower bearing platform and the upper bearing platform and enables the upper bearing platform to rotate relative to the lower bearing platform. An annular slideway is installed on the lower bearing platform, and a plurality of groups of support feet and sand boxes for supporting the upper bearing platform are arranged on the annular slideway; a support area facing each group of support feet is arranged on the upper surface of the annular slideway, and a water-soluble fabric is laid on the support area; a flushing structure is arranged at the position of the support area, and the flushing structure is used to supply water between the support feet and the support area, so that after the sand box is deaerated, the water-soluble fabric is dissolved by water.

[0008] In a preferred embodiment, the flushing structure includes a straight water channel and a serpentine water channel disposed within the support area. The two ends of the straight water channel point to the inner circle and the outer circle of the annular slideway. One end of the straight water channel is equipped with a water inlet pipe. The serpentine water channel is in a serpentine structure, and the end of the serpentine water channel close to the straight water channel communicates with the side surface of the end of the straight water channel far from the water inlet pipe. The other end of the serpentine water channel is equipped with a second outlet pipe, and the water inlet pipe is used to communicate with the output end of the water pump.

[0009] In a preferred embodiment, a wedge-shaped enclosure is provided on each side of the bottom of the support leg. After the empty sand box is removed, the wedge-shaped enclosure supports between the annular slideway and the support leg, so that the wedge-shaped enclosure surrounds the water-soluble fabric between the annular slideway and the support leg.

[0010] In a preferred embodiment, a first outlet pipe is inserted into the end of the straight water channel far from the water inlet pipe. One side of one end of the first outlet pipe is fixedly connected with a water blocking block. The water blocking block fits against the side wall of the straight water channel close to the serpentine water channel. A water outlet is provided at one end of the first outlet pipe close to the water blocking block. One end of the first outlet pipe located outside the annular slideway is fixedly connected with a side ear. When the first outlet pipe moves towards the water inlet pipe, the water blocking block blocks one end of the serpentine water channel, and the straight water channel communicates with the first outlet pipe through the water outlet.

[0011] In a preferred embodiment, a water blocking system is provided at the position of the second outlet pipe. The water blocking system includes a fixing plate fixedly installed on the annular slideway. A water channel is provided on the fixing plate. The water outlet end of the second outlet pipe passes upward from the bottom of the water channel into the water channel. A plug rod is movably inserted into the water channel. A driving component is also provided on the fixing plate, and the driving component is used to drive the plug rod to move inside the water channel, so that the water channel closes or opens the water outlet end of the second outlet pipe.

[0012] In a preferred embodiment, the driving component includes a fixed cylinder fixedly connected to one end of the plug rod. A motor is provided below the fixed cylinder, and the motor is fixedly installed on the fixing plate. The output end above the motor is fixedly connected with an eccentric wheel. The eccentric wheel is disposed inside the fixed cylinder below, and the outer side wall of the eccentric wheel fits against the inner side wall of the fixed cylinder. An elastic component is sleeved on the outer side wall of the plug rod, and both ends of the elastic component are pressed against the plug rod and the fixing plate.

[0013] In a preferred embodiment, the material of the water-soluble fabric is polyvinyl alcohol fiber, seaweed fiber or carboxymethyl cellulose fiber.

[0014] In a preferred embodiment, the ball joint system includes a lower ball joint and a lower turntable fixedly arranged on the upper surface of the lower bearing platform, and an upper ball joint and an upper turntable arranged on the lower surface of the upper bearing platform. The lower ball joint and the upper ball joint are in contact, and a positioning pin shaft is rotatably arranged in the middle of the lower ball joint and the upper ball joint. The lower ball joint is provided with a polytetrafluoroethylene sliding plate on the contact surface with the upper ball joint.

[0015] In a preferred embodiment, traction reaction seats are poured on both sides of the lower bearing platform, and steel strands are embedded and wound on the upper turntable. The ends of the steel strands pass through the traction reaction seats and are connected to continuous rotation jacks.

[0016] The present invention also provides an experimental method for a rotating ball hinge structure, comprising the following steps: Step 1: No-load test Without applying vertical load, after the water-soluble fabric is dissolved, use a horizontal jack to push the support feet, and measure and record the initial positions and moving distances of the support feet; Step 2: Gradual loading test Gradually apply vertical load to the support feet, divided into 3 - 5 levels of loading. After each level of loading, maintain a stable state. Under the maximum design load, push the support feet again to check their moving ability; Step 3: Friction coefficient measurement Use a horizontal jack to apply a horizontal thrust to the support feet, record the minimum thrust required to make the support feet start to rotate, and calculate the friction coefficient according to the formula:

[0017] Where: f is the friction coefficient, F is the horizontal thrust, and N is the vertical load.

[0018] Technical effects and advantages of the present invention: By laying a layer of water-soluble fabric between the annular slideway and the support feet, when the full weight of the beam body acts on the ball hinge system, there can still be a certain gap between the support feet and the annular slideway. Before rotating the beam body, use water to dissolve the water-soluble fabric to vacate the gap, so that when rotating the beam body, the support feet will not be abnormally tightly pressed against the annular slideway and cannot rotate normally. Description of the drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the construction of the present invention.

[0020] Figure 2 For the present invention Figure 1 Schematic diagram of the partial structure.

[0021] Figure 3 For the present invention Figure 2 Schematic diagram of the partial structure.

[0022] Figure 4 It is a schematic diagram of the installation of the annular slideway and the support feet of the present invention.

[0023] Figure 5 For the present invention Figure 4 Explosion diagram.

[0024] Figure 6This is the layout diagram of the straight water channel and the serpentine water channel of the present invention.

[0025] Figure 7 This is the schematic diagram of the first outlet pipe of the present invention.

[0026] Figure 8 This is the structural schematic of the water retaining system of the present invention Figure One 。

[0027] Figure 9 This is the structural schematic of the water retaining system of the present invention Figure Two 。

[0028] Figure 10 This is the structural schematic diagram of the spherical hinge system of the present invention.

[0029] Figure 11 This is the exploded view of the spherical hinge system of the present invention.

[0030] Figure 12 This is the flow chart of the experimental method for the rotating body spherical hinge structure of the present invention.

[0031] The reference numerals are: 1, lower bearing platform; 2, upper bearing platform; 3, spherical hinge system; 31, lower spherical hinge; 311, lower turntable; 312, polytetrafluoroethylene sliding piece; 32, upper spherical hinge; 321, upper turntable; 33, positioning pin shaft; 4, annular slideway; 41, support area; 42, straight water channel; 43, serpentine water channel; 44, water inlet pipe; 45, first outlet pipe; 451, water retaining block; 452, water outlet; 453, side ear; 46, second outlet pipe; 5, support leg; 6, sand box; 7, water-soluble fabric; 8, wedge-shaped enclosure; 9, water retaining system; 91, fixing plate; 911, water channel; 92, insertion rod; 93, elastic member; 94, driving member; 941, fixed cylinder; 942, eccentric wheel; 943, motor; 100, traction reaction seat; 101, steel strand. Detailed implementation manners

[0032] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Refer to the attached drawings of the specification Figures 1 - 12, A swivel ball hinge structure, including a lower bearing platform 1, an upper bearing platform 2 and a ball hinge system 3. The ball hinge system 3 is arranged between the lower bearing platform 1 and the upper bearing platform 2 and enables the upper bearing platform 2 to rotate relative to the lower bearing platform 1. An annular slideway 4 is installed on the lower bearing platform 1, and a plurality of groups of supporting feet 5 and sand boxes 6 for supporting the upper bearing platform 2 are arranged on the annular slideway 4; a support area 41 facing each group of supporting feet 5 is arranged on the upper surface of the annular slideway 4, and a water-soluble fabric 7 is laid on the support area 41, and the supporting feet 5 are pressed on the water-soluble fabric 7; a flushing structure is arranged at the position of the support area 41, and the flushing structure is used to supply water between the supporting feet 5 and the support area 41, so that after the sand box 6 is emptied, the water-soluble fabric 7 is dissolved by water.

[0034] During the construction process of the swivel bridge structure, after the sand box 6 is emptied, all the weight of the beam body is transferred to the ball hinge system 3. The ball hinge system 3 is subjected to a vertical load and will produce a downward micro-deformation. Therefore, the gap originally left between the supporting feet 5 and the annular slideway 4 may disappear, and the supporting feet 5 may abnormally press against the annular slideway 4, resulting in the problem of inability to slide. For this reason, the water-soluble fabric 7 is designed. Specifically, after the sand box 6 is emptied, the flushing structure is used to flush water to the position of the water-soluble fabric 7, so that the water-soluble fabric 7 is dissolved by water, and then a gap is generated between the supporting feet 5 and the annular slideway 4. Regarding the thickness of the water-soluble fabric 7, when the supporting feet 5 press down the water-soluble fabric 7 under the maximum vertical load, the thickness of the water-soluble fabric 7 should still be maintained at 3 mm - 5 mm.

[0035] In the above technical solution, the material of the water-soluble fabric 7 is polyvinyl alcohol fiber, seaweed fiber or carboxymethyl cellulose fiber.

[0036] It should be noted that polyvinyl alcohol fiber, seaweed fiber and carboxymethyl cellulose fiber are water-soluble fabrics. When in full contact with water at an appropriate temperature, the fabric will automatically dissolve.

[0037] Furthermore, as Figures 4 - 6 shown, the flushing structure includes a straight water channel 42 and a serpentine water channel 43 arranged in the support area 41. The two ends of the straight water channel 42 point to the inner circle and the outer circle of the annular slideway 4. A water inlet pipe 44 is installed at one end of the straight water channel 42. The serpentine water channel 43 is in a serpentine structure, and the end of the serpentine water channel 43 close to the straight water channel 42 is communicated with the side surface of the end of the straight water channel 42 far from the water inlet pipe 44. A second outlet pipe 46 is installed at the other end of the serpentine water channel 43, and the water inlet pipe 44 is used to communicate with the output end of the water pump.

[0038] It should be noted that after the water pump sends water from the water inlet pipe 44 to the straight water channel 42, then flows through the serpentine water channel 43, and finally flows out from the second outlet pipe 46. During this process, the water-soluble fabric 7 is dissolved by water.

[0039] In this embodiment, as Figures 1 - 3 and Figure 10 andFigure 11 As shown, the spherical hinge system 3 includes a lower spherical hinge 31 and a lower turntable 311 fixedly arranged on the upper surface of the lower bearing platform 1, and an upper spherical hinge 32 and an upper turntable 321 arranged on the lower surface of the upper bearing platform 2. The lower spherical hinge 31 and the upper spherical hinge 32 are in contact with each other, and a positioning pin shaft 33 is rotatably arranged in the middle of the lower spherical hinge 31 and the upper spherical hinge 32. A polytetrafluoroethylene sliding sheet 312 is arranged on the contact surface of the lower spherical hinge 31 and the upper spherical hinge 32.

[0040] Furthermore, traction reaction seats 100 are cast on both sides of the lower bearing platform 1. Steel strands 101 are embedded and wound on the upper turntable 321. The ends of the steel strands 101 pass through the traction reaction seats 100 and are connected to continuous rotation jacks.

[0041] In this embodiment, the implementation method is as follows: Before installing the support feet 5, first install and arrange the water inlet pipe 44, the first outlet pipe 45 and the second outlet pipe 46, then place the water-soluble fabric 7 in the area of the support area 41, and finally place the support feet 5 on the water-soluble fabric 7 and pour the upper bearing platform 2 well. When the beam body needs to be rotated, first completely lift the sand boxes 6 off the ground. At this time, the entire weight of the beam body is transferred to the spherical hinge system 3. By using the steel strands 101 embedded and wound on the upper turntable 321 and the continuous rotation jacks, overcome the dynamic friction torque between the lower spherical hinge 31 and the upper spherical hinge 32 and between the support feet 5 and the annular slideway 4, so that the beam body rotates into place.

[0042] The above technical solution pads a layer of water-soluble fabric 7 between the annular slideway 4 and the support feet 5, so that when the entire weight of the beam body acts on the spherical hinge system 3, there is still a certain gap between the support feet 5 and the annular slideway 4. Before rotating the beam body, use water to dissolve the water-soluble fabric 7 and vacate the gap, so that when rotating the beam body, the support feet 5 will not be abnormally tightly pressed against the annular slideway 4 and cannot rotate normally.

[0043] Refer to the attached drawings of the specification Figures 4 - 5 As the water-soluble fabric 7 dissolves, water may quickly overflow from the upper surface of the straight water channel 42 and the serpentine water channel 43, resulting in a slower dissolution rate of the remaining undissolved water-soluble fabric 7. Therefore, the following technical solution is proposed. Specifically, a wedge-shaped enclosure 8 is arranged on each side of the bottom of the support feet 5. After the sand boxes 6 are lifted off the ground, the wedge-shaped enclosure 8 supports between the annular slideway 4 and the support feet 5, so that the wedge-shaped enclosure 8 surrounds the water-soluble fabric 7 between the annular slideway 4 and the support feet 5.

[0044] It should be noted that after the sand boxes 6 are lifted off the ground, use the wedge-shaped enclosures 8 to surround the periphery of the bottom of the support feet 5, allowing only a small amount of water to overflow. As Figure 5 shown, if there are four sides at the bottom of the support feet 5, four corresponding wedge-shaped enclosures 8 are used. The inclined surfaces of the wedge-shaped enclosures 8 are inserted into the gaps between the annular slideway 4 and the support feet 5. Before the beam body rotates, the wedge-shaped enclosures 8 can be taken out.

[0045] Refer to the appended description Figures 4 - 7 Figures 4 - 7 , it should be noted that during the dissolution of the water-soluble fabric 7, not all of the dissolved fibers can be discharged from the second outlet pipe 46, and a part of them will remain in the gap. Due to the error in the local flatness of the upper surface of the annular slideway 4, if some fibers remain in the gap, it may increase the resistance during the rotation, so they should be removed. Specifically, one end of the straight water channel 42 far from the water inlet pipe 44 is inserted with the first outlet pipe 45. One side of one end of the first outlet pipe 45 is fixedly connected with a water blocking block 451. The water blocking block 451 is attached to the side wall of the straight water channel 42 close to the serpentine water channel 43. One end of the first outlet pipe 45 close to the water blocking block 451 is provided with a water outlet 452. One end of the first outlet pipe 45 located outside the annular slideway 4 is fixedly connected with a side ear 453. When the first outlet pipe 45 moves towards the water inlet pipe 44, the water blocking block 451 blocks one end of the serpentine water channel 43, and the straight water channel 42 is communicated with the first outlet pipe 45 through the water outlet 452.

[0046] It should be noted that before the rotation, strike the side ear 453 to make the first outlet pipe 45 move towards the inside of the straight water channel 42. At this time, the first outlet pipe 45 blocks the end of the serpentine water channel 43 to prevent a large amount of water from flowing away from the serpentine water channel 43. Pour clean water into the water inlet pipe 44, and the water is discharged from the straight water channel 42 through the water outlet 452 and the first outlet pipe 45. A part of the water flows out from the gap between the annular slideway 4 and the support leg 5, and the flowing water carries out the fibers in the gap. Pay attention to cleaning the water flowing out from the gap to prevent the fibers from remaining on the annular slideway 4.

[0047] Refer to the appended description Figures 4 - 5 and Figures 8 - 9 Figures 8 - 9 , when the water flows through the straight water channel 42 and the serpentine water channel 43, it will dissolve the water-soluble fabric 7, but the penetration speed of the water is slow. Therefore, the method of increasing the water pressure in the straight water channel 42 and the serpentine water channel 43 can be adopted to make the water quickly penetrate the water-soluble fabric 7. Specifically, a water blocking system 9 is provided at the position of the second outlet pipe 46. The water blocking system 9 includes a fixing plate 91. The fixing plate 91 is fixedly installed on the annular slideway 4. A water channel 911 is opened on the fixing plate 91. The water outlet end of the second outlet pipe 46 passes through the bottom of the water channel 911 and enters the water channel 911 upward. A plug rod 92 is movably inserted into the water channel 911. A driving component 94 is also provided on the fixing plate 91. The driving component 94 is used to drive the plug rod 92 to move inside the water channel 911 so that the water channel 911 closes or opens the water outlet end of the second outlet pipe 46.

[0048] Further, the driving component 94 includes a fixed cylinder 941 fixedly connected to one end of the insertion rod 92. Below the fixed cylinder 941, there is a motor 943 fixedly installed on the fixed plate 91. The output end above the motor 943 is fixedly connected to an eccentric wheel 942. The eccentric wheel 942 is arranged inside the lower part of the fixed cylinder 941, and the outer side wall of the eccentric wheel 942 is in contact with the inner side wall of the fixed cylinder 941. An elastic component 93 is sleeved on the outer side wall of the insertion rod 92, and both ends of the elastic component 93 are pressed against the insertion rod 92 and the fixed plate 91.

[0049] It should be noted that a metering pump is adopted for the water pump. The metering pump supplies water from the water inlet pipe 44 to the straight water channel 42 and the serpentine water channel 43. During the water supply process, when the second water outlet pipe 46 is closed, the pressure in the straight water channel 42 and the serpentine water channel 43 rises. When the second water outlet pipe 46 is opened, the water in the straight water channel 42 and the serpentine water channel 43 is quickly discharged, and the pressure decreases. Specifically, the motor 943 drives the eccentric wheel 942 to rotate. The eccentric wheel 942 can drive the fixed cylinder 941 and the insertion rod 92 to move to the right by pushing the inner wall of the fixed cylinder 941 ( Figure 8 and Figure 9 in the direction of). During the rotation of the eccentric wheel 942, under the action of the elastic component 93, the insertion rod 92 can be reset to the left. In this way, the reciprocating movement of the insertion rod 92 can be realized. When the insertion rod 92 moves to the upper end of the second water outlet pipe 46 to the right, the second water outlet pipe 46 is closed. When the insertion rod 92 moves away from the upper end of the second water outlet pipe 46 to the left, the second water outlet pipe 46 is opened. In this way, the pressure of the water in the straight water channel 42 and the serpentine water channel 43 can be controlled, and the water can quickly penetrate into the water-soluble fabric 7 to dissolve the water-soluble fabric 7.

[0050] As Figure 12 shown, in this embodiment, an experimental method for a rotating body ball hinge structure is also provided, including the following steps: Step 1: No-load test Without applying vertical load, after the water-soluble fabric 7 is dissolved, use a horizontal jack to push the support leg 5, and measure and record the initial position and moving distance of the support leg 5; Step 2: Gradual loading test Gradually apply vertical load to the support leg 5, divided into 3 - 5 levels of loading. After each level of loading, maintain a stable state. Under the maximum design load, push the support leg 5 again to check its moving ability; Step 3: Friction coefficient measurement Use a horizontal jack to apply a horizontal thrust to the support leg 5, record the minimum thrust required to make the support leg 5 start to rotate, and calculate the friction coefficient according to the formula:

[0051] Where: f is the friction coefficient, F is the horizontal thrust, and N is the vertical load.

[0052] It should be noted that, by adopting the above experiment, it is possible to determine the movement resistance when the support leg 5 is subjected to the maximum design load, and to determine whether the support leg 5 and the annular slideway 4 are tightened.

[0053] The following is a further description of the rotation structure construction work: (1) The rotation system consists of two YCK10000 continuous rotation jacks, one main control console, and one ZLD1000 continuous automatic pump station connected by high-pressure oil pipes and cables to form two sets of rotation power systems. The system uses a displacement sensor wireless transmission system to collect elongation displacement with an accuracy of up to 1mm. It forms a closed-loop control with the pump station oil pump frequency conversion system to achieve precise synchronization and realize dual control of pressure and displacement synchronization. Each jack (front and rear jack) is equipped with a clamping device at the front end. The continuous rotation jacks are arranged horizontally, parallelly and symmetrically on the traction reaction seats on both sides of the turntable. The center line of the jack must be tangent to the outer circle of the upper turntable 321 (where the steel strand 101 is wound), and the center line height is horizontal to the center line of the embedded steel strand 101 on the upper turntable 321. At the same time, the distance between the two jacks and the upper turntable 321 is required to be equal, and the distance from the tangent point where the traction rope is separated from the steering is greater than 2 meters. The jack is fixed to the reaction frame with high-strength bolts, and the reaction frame is fixed to the traction reaction seat with high-strength bolts. The main console should be placed in a position with a wide line of sight and a clear view of the overall situation on site.

[0054] (2) Operate each pump station to pre-tighten each jack steel strand 101, so that the tightness of each jack steel strand 101 is basically the same. Remove the oil nozzles of the forward and backward anchor tops, and install them again when the clamps need to be loosened, so as to avoid damage to the oil nozzles due to the rotation of the piston during the rotation process.

[0055] (3) Before the formal rotation, a trial run is carried out to comprehensively check whether all systems are in good condition and to test the safety and reliability of the entire system. After the trial run is completed, the rotation implementation plan is revised based on the collected data before the formal rotation can be carried out.

[0056] (4) Time for rotation. The rotation is mainly divided into three steps: the total rotation angle is 53 degrees. The rotation is mainly divided into three steps (trial rotation of 5 degrees, normal rotation of 46.5 degrees, and inching rotation of 1.5 degrees), and the rotation angular velocity is 1.12 degrees. The trial rotation takes 5 degrees (level III construction, completed the day before the normal rotation), the normal rotation (level II construction) takes 46.5 / 1.12=42 minutes, and the inching rotation of 1.5 degrees takes 5 minutes, a total of 47 minutes, and the other steps take about 60 minutes (starting the power supply for 5 minutes, waiting for the rotation construction command for 10 minutes, the rotation is basically in place and entering the adjustment stage for 15 minutes, the rotation is in place and fine-tuning and re-measurement for 10 minutes, and the personnel and equipment are evacuated for 20 minutes), a total of 110 minutes.

[0057] (5) Turntable Sealing After the girder body is rotated and positioned, at both ends, the temporary supports already set up by the traction reaction seats 100 are used to fix the girder body to ensure its stability, and then the sealing plate construction is carried out.

[0058] (6) Anti-tilting Insurance System The anti-tilting insurance system is an important guarantee measure in the rotation construction method. According to the characteristics of the design structure, during the rotation process, the entire weight of the rotating body is borne by the spherical hinge system 3, but the rotating structure is prone to tilting due to the influence of construction. Therefore, the supporting feet 5 must be set. The supporting feet are arranged in a ring on the upper turntable 321, with a gap of 3 mm to 6 mm reserved between them and the lower slideway. When rotating along the annular slideway 4 under the action of the rotating load, there is a gap, which is convenient for determining the load state and adjusting the rotation attitude. Four jacks are arranged on the outside of the slideway, which is convenient for adjusting the tilting attitude of the rotating body during the rotation construction process.

[0059] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, 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 swivel ball joint structure, characterized in that: The invention comprises a lower support platform (1), an upper support platform (2) and a ball joint system (3), wherein the ball joint system (3) is arranged between the lower support platform (1) and the upper support platform (2) and enables the upper support platform (2) to rotate relative to the lower support platform (1), and an annular slideway (4) is installed on the lower support platform (1), and a plurality of groups of supporting legs (5) and a sand box (6) are arranged on the annular slideway (4) for supporting the upper support platform (2); The upper surface of the annular slideway (4) is provided with a support area (41) directly opposite to each group of support legs (5), the support area (41) is paved with a water-soluble fabric (7), and the support legs (5) are pressed on the water-soluble fabric (7); A flushing structure is provided at the position of the support area (41), and the flushing structure is used to supply water between the support legs (5) and the support area (41), so that after the sand box (6) is emptied, the water-soluble fabric (7) is dissolved by water.

2. The swivel ball joint structure according to claim 1, characterized in that: The flushing structure comprises a straight water channel (42) and a serpentine water channel (43) arranged in the support area (41), the two ends of the straight water channel (42) pointing to the inner circle and the outer circle of the annular slideway (4), one end of the straight water channel (42) is installed with a water inlet pipe (44), the serpentine water channel (43) is a serpentine structure, and the end of the serpentine water channel (43) close to the straight water channel (42) is connected to the side of the straight water channel (42) away from the end of the water inlet pipe (44), the other end of the serpentine water channel (43) is installed with a second water outlet pipe (46), and the water inlet pipe (44) is used to connect to the output end of the water pump.

3. A swivel ball joint structure according to claim 2, characterized in that: A wedge-shaped enclosure (8) is provided on each side of the bottom of the support leg (5). After the sand box (6) is emptied, the wedge-shaped enclosure (8) is supported between the annular slideway (4) and the support leg (5), so that the wedge-shaped enclosure (8) surrounds the water-soluble fabric (7) between the annular slideway (4) and the support leg (5).

4. The swivel ball joint structure according to claim 2, characterized in that: An end of the straight water channel (42) away from the water inlet pipe (44) is plugged with a water outlet pipe (45); one side of one end of the water outlet pipe (45) is fixedly connected to a water retaining block (451); the water retaining block (451) fits the side wall of the straight water channel (42) close to the serpentine water channel (43); an end of the water outlet pipe (45) close to the water retaining block (451) is provided with a water outlet (452); an end of the water outlet pipe (45) located outside the annular slideway (4) is fixedly connected to a side ear (453); when the water outlet pipe (45) moves in the direction of the water inlet pipe (44), the water retaining block (451) blocks one end of the serpentine water channel (43), and the straight water channel (42) is connected to the water outlet pipe (45) through the water outlet (452).

5. The swivel ball joint structure according to claim 2, characterized in that: A water retaining system (9) is provided at the position of the second water outlet pipe (46), the water retaining system (9) comprising a fixing plate (91), the fixing plate (91) being fixedly mounted on the annular slideway (4), the fixing plate (91) being provided with a water channel (911), the water outlet end of the second water outlet pipe (46) passing upward into the water channel (911) from the bottom of the water channel (911), an insertion rod (92) being movably inserted inside the water channel (911), the fixing plate (91) being further provided with a driving component (94), the driving component (94) being used to drive the insertion rod (92) to move inside the water channel (911), so that the water channel (911) closes or opens the water outlet end of the second water outlet pipe (46).

6. The swivel ball joint structure according to claim 5, characterized in that: The driving component (94) comprises a fixed cylinder (941), the fixed cylinder (941) being fixedly connected to one end of the insertion rod (92), a motor (943) being arranged below the fixed cylinder (941), the motor (943) being fixedly mounted on the fixing plate (91), an eccentric wheel (942) being fixedly connected to the output end above the motor (943), the eccentric wheel (942) being arranged inside below the fixed cylinder (941), and the outer side wall of the eccentric wheel (942) being in contact with the inner side wall of the fixed cylinder (941), an elastic component (93) being sleeved on the outer side wall of the insertion rod (92), and two ends of the elastic component (93) being pressed against the insertion rod (92) and the fixing plate (91).

7. The swivel ball joint structure according to claim 1, characterized in that: The water-soluble fabric (7) is made of polyvinyl alcohol fiber, seaweed fiber or carboxymethyl cellulose fiber.

8. The swivel ball joint structure according to claim 1, characterized in that: The ball joint system (3) comprises a lower ball joint (31) and a lower turntable (311) fixedly arranged on the upper surface of the lower support platform (1), and an upper ball joint (32) and an upper turntable (321) arranged on the lower surface of the upper support platform (2); the lower ball joint (31) and the upper ball joint (32) are arranged in contact with each other, and a positioning pin shaft (33) is rotatably arranged in the middle of the lower ball joint (31) and the upper ball joint (32); and the lower ball joint (31) is provided with a tetrafluoroethylene sliding plate (312) on the contact surface with the upper ball joint (32).

9. The swivel ball joint structure according to claim 8, characterized in that: Traction reaction seats (100) are cast on both sides of the lower support platform (1), and steel hinge wires (101) are pre-embedded and wound on the upper turntable (321). The ends of the steel hinge wires (101) pass through the traction reaction seats (100) and are connected to the continuous rotation jack.

10. An experimental method for a swivel ball joint structure, characterized in that: The following steps are involved: Step 1: No-load test Without applying a vertical load, after the water-soluble fabric (7) is dissolved, use a horizontal jack to push the support leg (5), and measure and record the initial position and movement distance of the support leg (5); Step 2: Graded loading test Apply vertical loads to the support leg (5) gradually, divided into 3-5 levels of loading. After each level of loading, keep the support leg (5) in a stable state. Under the maximum design load, push the support leg (5) again to check its mobility. Step 3: Friction coefficient determination Use a horizontal jack to apply a horizontal thrust to the support leg (5), record the minimum thrust required to make the support leg (5) start to rotate, and calculate the friction coefficient according to the formula: Where: f is the friction coefficient, F is the horizontal thrust, and N is the vertical load.

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