Displacement-controllable support system under tensioning effect

Abstract

The utility model discloses a support system capable of being controlled in displacement under the tensioning effect. The support system is arranged between a roof steel latticed shell and a roof aluminum alloy latticed shell. The support system comprises a support main body and a displacement control device; the displacement control device is arranged in the direction perpendicular to the pulling direction of the inhaul cable. The displacement control device comprises a first-stage limiting plate, a second-stage limiting plate and a third-stage limiting plate; the third-level limiting plate is in a C shape, the lower end of the third-level limiting plate is connected to the lower support plate, and the upper end of the third-level limiting plate corresponds to the upper support plate in height. The first-stage limiting plate and the second-stage limiting plate are horizontally and detachably connected to the two sides of the upper end of the third-stage limiting plate respectively, the end, close to one side of the support body, of the second-stage limiting plate exceeds the end, close to one side of the support body, of the third-stage limiting plate, and the end, close to one side of the support body, of the first-stage limiting plate exceeds the end, close to one side of the second-stage limiting plate, of the second-stage limiting plate. The utility model solves the technical problems that the traditional support system cannot prevent the sudden stress change of the support node and cannot monitor and limit the displacement of the support in a grading manner according to the tensioning condition.

Description

Technical Field

[0001] The utility model relates to the technical field of large-span space structural steel structure installation, in particular to a support system with controllable displacement under tensioning action. Background Art

[0002] At present, in some large public buildings such as stadiums and other large-span spatial steel structures, due to the complexity of the structural system, at some key nodes, the design needs to comprehensively consider the influencing factors such as the shrinkage of rods caused by temperature, the stability of the structure against wind and the vibration reduction during earthquakes, and the different internal stresses at different stages of construction. In particular, for large-span spatial structures that require cable tensioning, the design often releases the force on the nodes through the displacement of the supports.

[0003] The cables of large-span spatial structures are usually tensioned three times. During tensioning, the supports are required to release a certain amount of displacement in a predetermined direction to avoid stress concentration and sudden force changes at the support node positions. However, considering the deviation in spatial structure construction and the force conversion of the overall structure during tensioning, the supports will have a large instantaneous displacement, affecting the overall safety of the structure, and this displacement needs to be limited.

[0004] Therefore, how to create a support system with controllable displacement under tensioning, which can meet the requirements of appropriate and controllable displacement of the support before and after tensioning without affecting the overall construction and the safety of the main structure, and without affecting the normal internal stress release of the main structure, is one of the important current research and development topics. Utility Model Content

[0005] The purpose of the utility model is to provide a support system with controllable displacement under tension, so as to solve the technical problems that the traditional system cannot avoid stress concentration at the support node position and sudden force change, and cannot perform graded monitoring and limitation of the displacement of the support according to the tension condition.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions.

[0007] A support system with controllable displacement under tension is arranged between a roof steel lattice shell and a roof aluminum alloy lattice shell; the roof steel lattice shell is a steel grid structure, and a circular installation opening is reserved in the middle of the roof steel lattice shell; the roof aluminum alloy lattice shell is installed at the installation opening of the roof steel lattice shell, and a cable is provided on the outer ring beam on the roof aluminum alloy lattice shell at the position corresponding to the support system; the cable is stretched along the radial direction of the roof aluminum alloy lattice shell; the support system includes a support body and a displacement control device; the support body includes a lower support plate and an upper support The lower support plate is installed on the steel lattice shell of the roof; the aluminum alloy lattice shell of the roof is installed on the upper support plate; the side length of the lower support plate is greater than the side length of the upper support plate, and a support block is arranged in the middle of the top of the lower support plate; the upper support plate is installed on the top of the support block and can slide relative to the support block; the displacement control device has a group of displacement control devices arranged on the support body at intervals along a direction perpendicular to the pulling direction of the cable, and a group of displacement control devices and the cable are located on the same side of the support body; the displacement control device includes a primary limit plate, a secondary limit plate and The three-level limit plate is C-shaped, and the lower end of the three-level limit plate is connected to the lower support plate, and the upper end of the three-level limit plate corresponds to the height of the upper support plate; the first-level limit plate and the second-level limit plate are respectively and horizontally detachably connected to the two sides of the upper end of the three-level limit plate, and the end of the second-level limit plate close to the support body exceeds the end of the corresponding side of the third-level limit plate, and the end of the first-level limit plate close to the support body exceeds the end of the corresponding side of the second-level limit plate; there is a gap between the first-level limit plate and the upper support plate, and the width of the gap is the same as that of the tension cable The distance that the upper support plate is allowed to move when the first tension is applied is adapted to the distance that the upper support plate is allowed to move when the second tension is applied to the cable; the length of the part where the second limit plate exceeds the third limit plate is adapted to the distance that the upper support plate is allowed to move when the third tension is applied to the cable; a first pressure sensor is installed on the end surface of the first limit plate, the second limit plate and the third limit plate close to one end of the support body; the first pressure sensor is electrically connected to the controller.

[0008] Preferably, the support body is a spherical support or a sliding support.

[0009] Preferably, the three-stage limit plate includes an upper horizontal plate section, a vertical plate section and a lower horizontal plate section; the lower horizontal plate section is crimped onto the bottom of the lower support plate and welded to the lower support plate; reinforcing connecting plates are arranged at intervals on both sides of the bottom of the lower support plate and located on both sides of the lower horizontal plate section; the reinforcing connecting plates are welded to the lower support plate and the lower horizontal plate section respectively; the first-stage limit plate and the second-stage limit plate are connected to both sides of the upper horizontal plate section by bolts respectively.

[0010] Preferably, a spacing is left between the first-level limiting plate and the end away from the support body and the side edge of the corresponding side of the third-level limiting plate; a first groove is opened on the third-level limiting plate, at a position beyond the first-level limiting plate; a first blocking plate is arranged in the first groove, and the first blocking plate blocks the corresponding end of the first-level limiting plate.

[0011] Preferably, a spacing is left between the secondary limiting plate and the side edge of the end away from the support body and the corresponding side of the tertiary limiting plate; a second groove is opened on the tertiary limiting plate, at a position beyond the secondary limiting plate; a second blocking plate is arranged in the second groove, and the second blocking plate blocks the corresponding end of the secondary limiting plate.

[0012] Preferably, an alarm device is also included; the alarm device is connected to the controller by telecommunication.

[0013] Preferably, it also includes an automatic fixing mechanism; the automatic fixing mechanism is arranged on both sides of the support block and is an electromagnetic automatic fixing mechanism or a hydraulic automatic fixing mechanism;

[0014] The electromagnetic automatic fixing mechanism includes a pole, a forward coil, a reverse coil and a mounting plate; the forward coil and the reverse coil are respectively connected to the support block and the upper support plate through the mounting plate, and one end of the forward coil is connected to one end of the reverse coil, and the other end of the forward coil and the other end of the reverse coil are connected to the power supply; a switch is arranged in the circuit formed by the forward coil and the reverse coil; the switch is electrically connected to the controller; a reset spring is arranged in the forward coil and the reverse coil respectively; there are two poles, which are respectively inserted into the reset springs in the forward coil and the reverse coil; limit posts are respectively arranged on the opposite sides of the two poles, and the poles are connected to the corresponding reset springs through the limit posts; when the circuit is closed, the two poles are connected by electromagnetics; when the pressure sensed by the first pressure sensor reaches the design value, the automatic fixing mechanism is activated to prevent the upper support plate from moving forward.

[0015] The hydraulic automatic fixing mechanism includes a hydraulic jack, a reaction plate and a pressure plate; a second mounting plate is provided on the left and right side surfaces of the support block, close to the front side surface of the support block; the hydraulic jack is mounted on the second mounting plate, and the telescopic end of the hydraulic jack is arranged toward the rear side; the hydraulic jack is electrically connected to the controller; the pressure plate is mounted on the upper support plate, close to the rear side surface of the support block, and the pressure plate and the reaction plate are arranged correspondingly in the longitudinal direction.

[0016] Preferably, angle monitoring devices are arranged at intervals on the lower support plate and on both sides of the cable; the angle monitoring devices on both sides of the cable are symmetrically arranged with respect to the cable; the angle monitoring device includes a vertical support, a connecting spring and a second pressure sensor; the vertical support is connected to the lower support plate; the connecting spring is fixed on the vertical support at a height corresponding to the upper support plate, and the free end of the connecting spring is in contact with the upper support plate; a second pressure sensor is connected to the end of the connecting spring that contacts the upper support plate; the first pressure sensor, the second pressure sensor and the automatic fixing mechanism are respectively connected to the controller by telecommunications.

[0017] Compared with the prior art, the utility model has the following characteristics and beneficial effects.

[0018] 1. The displacement control device of the utility model is designed according to the three-stage tensioning principle in the tensioning process, and the primary, secondary and tertiary limit plates are used to limit the upper support plate during the three tensioning processes, so as to ensure that the support does not displace during tensioning. At the same time, the lower cross plate section of the three-stage limit plate is welded to the lower surface of the lower support plate, which improves the stability of the displacement control device and ensures that the displacement control device has a certain strength and rigidity; during the three tensioning processes, the primary and secondary limit plates are removed in turn to limit the excessive displacement of the support each time. After each tensioning process, the device only needs one construction worker to remove the bolts to remove the steel plate, which makes the construction more convenient and improves the construction safety.

[0019] 2. The utility model installs the first pressure sensor at the end of the primary, secondary and tertiary limit plates respectively, and monitors the pressure borne by each level of limit plates in real time through the first pressure sensor, thereby avoiding damage caused by excessive pressure at the end of the limit plate at a certain moment; at the same time, the utility model arranges automatic fixing mechanisms on both sides of the support body. When the pressure measured by the first pressure sensor does not meet the design requirements, the automatic fixing mechanism is activated by the controller to prevent the upper support plate from moving forward, and at the same time, reinforcement measures are taken for the third limit plate and the first limit plate to prevent dangerous situations from occurring.

[0020] 3. The utility model arranges second pressure sensors at intervals on both sides of the cable, and calculates the difference between each pair of values ​​through real-time monitoring of the second pressure sensor data. Then, the variance or standard deviation of these differences is taken to measure the overall discreteness. When the variance or standard deviation at a certain moment exceeds the design value, the angle of the corresponding cable is adjusted to make the cable pulling direction accurate and the error value small.

[0021] 4. The utility model ensures the stability of the displacement control device by symmetrically arranging the displacement control device on both sides of the cable, thereby avoiding stress concentration at the support node position and sudden force change. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] Figure 1 It is a structural schematic diagram of the steel grid shell of the roof in the utility model.

[0024] Figure 2 It is a structural schematic diagram of the aluminum alloy lattice shell of the roof in the utility model.

[0025] Figure 3 The utility model is a structural schematic diagram of connecting cables on the aluminum alloy lattice shell of the roof.

[0026] Figure 4 It is a schematic diagram of the longitudinal section structure of a displacement control device arranged on the support body in the utility model.

[0027] Figure 5 It is a schematic diagram of the longitudinal section structure of an angle monitoring device arranged on the support body in the utility model.

[0028] Figure 6 It is a structural schematic diagram of a first groove arranged on a three-level limiting plate in the utility model.

[0029] Figure 7 It is a structural schematic diagram of a second groove arranged on a three-level limiting plate in the utility model.

[0030] Figure 8 It is a top view of the displacement control device in the utility model.

[0031] Fig. 9 It is a cross-sectional structural schematic diagram of the utility model in which electromagnetic automatic fixing mechanisms are respectively arranged on the left and right sides of the support body.

[0032] Fig.10 It is a cross-sectional structural schematic diagram of the utility model in which hydraulic automatic fixing mechanisms are respectively arranged on the left and right sides of the support body.

[0033] Fig.11 It is a structural schematic diagram of the electromagnetic automatic fixing mechanism in the utility model.

[0034] Fig.12 It is a vertical cross-sectional structural schematic diagram of the electromagnetic automatic fixing mechanism in the utility model.

[0035] Figure numerals: 1-roof steel lattice shell, 2-roof aluminum alloy lattice shell, 3-installation port, 4-cable, 5-support body, 5.1-lower support plate, 5.2-upper support plate, 5.3-support block, 6-first-level limit plate, 7-second-level limit plate, 8-third-level limit plate, 8.1-upper horizontal plate section, 8.2-vertical plate section, 8.3-lower horizontal plate section, 9-first pressure sensor, 10-vertical support, 11-connecting spring, 12-second pressure sensor, 13-first groove, 14-reinforced connecting plate, 15-bolt, 16-first blocking plate, 17-second groove, 18-second blocking plate, 19-pole, 20-forward coil, 21-reverse coil, 22-first mounting plate, 23-reset spring, 24-limit column, 25-hydraulic jack, 26-reaction plate, 27-pressure plate, 28-second mounting plate. DETAILED DESCRIPTION

[0036] like Figure 1-12As shown, this support system with controllable displacement under tension is arranged between the roof steel grid shell 1 and the roof aluminum alloy grid shell 2; the roof steel grid shell 1 is a steel grid structure, and a circular installation opening 3 is reserved in the middle of the roof steel grid shell 1; the roof aluminum alloy grid shell 2 is installed at the installation opening 3 of the roof steel grid shell 1, and a cable 4 is provided on the outer ring beam on the roof aluminum alloy grid shell 2 at the position corresponding to the support system; the cable 4 is stretched along the radial direction of the roof aluminum alloy grid shell 2; the support system includes a support body 5 and a displacement control device; the support body 5 includes a lower support plate 5.1 and an upper support plate 5.2; The lower support plate 5.1 is installed on the roof steel lattice shell 1; the roof aluminum alloy lattice shell 2 is installed on the upper support plate 5.2; the side length of the lower support plate 5.1 is greater than the side length of the upper support plate 5.2, and a support block 5.3 is arranged in the middle of the top of the lower support plate 5.1; the upper support plate 5.2 is installed on the top of the support block 5.3 and can slide relative to the support block 5.3; the displacement control device has a group, which is arranged on the support body 5 at intervals along a direction perpendicular to the pulling direction of the cable 4, and a group of displacement control devices and the cable 4 are located on the same side of the support body 5; the displacement control device includes a primary limit plate 6, a secondary ... The first-level limiting plate 7 and the third-level limiting plate 8; the third-level limiting plate 8 is C-shaped, and the lower end of the third-level limiting plate 8 is connected to the lower support plate 5.1, and the upper end of the third-level limiting plate 8 corresponds to the height of the upper support plate 5.2; the first-level limiting plate 6 and the second-level limiting plate 7 are respectively and horizontally detachably connected to the two sides of the upper end of the third-level limiting plate 8, and the end of the second-level limiting plate 7 close to the support body 5 exceeds the end of the corresponding side of the third-level limiting plate 8, and the end of the first-level limiting plate 6 close to the support body 5 exceeds the end of the corresponding side of the second-level limiting plate 7; there is a gap between the first-level limiting plate 6 and the upper support plate 5.2, and the width of the gap It is adapted to the distance that the upper support plate 5.2 is allowed to move when the first tension is applied to the cable 4; the length of the portion where the first limit plate 6 exceeds the second limit plate 7 is adapted to the distance that the upper support plate 5.2 is allowed to move when the second tension is applied to the cable 4; the length of the portion where the second limit plate 7 exceeds the third limit plate 8 is adapted to the distance that the upper support plate 5.2 is allowed to move when the third tension is applied to the cable 4; a first pressure sensor 9 is installed on the end surface of the first limit plate 6, the second limit plate 7 and the third limit plate 8 close to one end of the support body 5; the first pressure sensor 9 is electrically connected to the controller.

[0037] In this embodiment, the support body 5 is a spherical support or a sliding support; the cable 4 is arranged corresponding to the radial axis of the support body 5.

[0038] In this embodiment, the three-stage limiting plate 8 includes an upper horizontal plate section 8.1, a vertical plate section 8.2 and a lower horizontal plate section 8.3; the lower horizontal plate section 8.3 is crimped on the bottom of the lower support plate 5.1 and is welded to the lower support plate 5.1; reinforcing connecting plates 14 are arranged at intervals on both sides of the bottom of the lower support plate 5.1 and on the lower horizontal plate section 8.3; the reinforcing connecting plates 14 are welded to the lower support plate 5.1 and the lower horizontal plate section 8.3 respectively; the first-stage limiting plate 6 and the second-stage limiting plate 7 are connected to both sides of the upper horizontal plate section 8.1 by bolts 15 respectively.

[0039] In this embodiment, a spacing is left between the first-level limiting plate 6 and the side edge of the end away from the support body 5 and the corresponding side of the third-level limiting plate 8; a first groove 13 is opened on the third-level limiting plate 8, at a position beyond the first-level limiting plate 6; a first blocking plate 16 is arranged in the first groove 13, and the first blocking plate 16 blocks the corresponding end of the first-level limiting plate 6.

[0040] In this embodiment, a spacing is left between the secondary limiting plate 7 and the side edge of the end away from the support body 5 and the corresponding side of the tertiary limiting plate 8; a second groove 17 is opened on the tertiary limiting plate 8, at a position beyond the secondary limiting plate 7; a second blocking plate 18 is arranged in the second groove 17, and the second blocking plate 18 blocks the corresponding end of the secondary limiting plate 7; the first groove 13 and the second groove 17 are opened on the vertical plate section 8.2.

[0041] In this embodiment, an alarm device is also included; the alarm device is connected to the controller by telecommunication.

[0042] In this embodiment, an automatic fixing mechanism is also included; the automatic fixing mechanism is arranged on the left and right sides of the support block, and is an electromagnetic automatic fixing mechanism or a hydraulic automatic fixing mechanism;

[0043] The electromagnetic automatic fixing mechanism includes a pole 19, a forward coil 20, a reverse coil 21 and a mounting plate 22; the forward coil 20 and the reverse coil 21 are respectively connected to the support block 5.3 and the upper support plate 5.2 through the mounting plate 22, and one end of the forward coil 20 is connected to one end of the reverse coil 21, and the other end of the forward coil 20 and the other end of the reverse coil 21 are connected to the power supply; a switch is provided in the circuit formed by the forward coil 20 and the reverse coil 21; the switch is electrically connected to the controller; the A reset spring 23 is respectively arranged in the forward coil 20 and the reverse coil 21; there are two poles 19, which are respectively inserted into the reset springs 23 in the forward coil 20 and the reverse coil 21; limiting poles 24 are respectively arranged on the opposite sides of the two poles 19, and the poles 19 are connected to the corresponding reset springs 23 through the limiting poles 24; when the circuit is closed, the two poles 19 are electromagnetically connected; when the pressure sensed by the first pressure sensor 9 reaches the design value, the automatic fixing mechanism is activated to prevent the upper support plate 5.2 from moving forward.

[0044] The hydraulic automatic fixing mechanism includes a hydraulic jack 25, a reaction plate 26 and a pressure plate 27; a second mounting plate 28 is provided on the left and right side surfaces of the support block 5.3, near the front side surface of the support block 5.3; the hydraulic jack 25 is installed on the second mounting plate 28, and the telescopic end of the hydraulic jack 25 is arranged toward the rear side; the hydraulic jack 25 is electrically connected to the controller; the pressure plate 27 is installed on the upper support plate 5.2, near the rear side surface of the support block 5.3, and the pressure plate 27 and the reaction plate 26 are arranged longitudinally correspondingly; when the pressure measured by the first pressure sensor does not meet the design requirements, the hydraulic jack 25 is controlled to extend by the controller, and the telescopic end of the hydraulic jack 25 is against the pressure plate 27 to prevent the upper support plate from moving forward.

[0045] In this embodiment, the forward coil 20 and the reverse coil 21 both include a steel cylinder and a wire wound around the outside of the steel cylinder; the steel cylinder is integrally formed with a corresponding mounting plate 22; and a hole is provided on the mounting plate 22 for passing through the pole 19.

[0046] In this embodiment, angle monitoring devices are arranged at intervals on both sides of the lower support plate 5.1; the angle monitoring devices on both sides of the cable 4 are symmetrically arranged with respect to the cable; the angle monitoring device includes a vertical support 10, a connecting spring 11 and a second pressure sensor 12; the vertical support 10 is connected to the lower support plate 5.1; the connecting spring 11 is fixed on the vertical support 10 at a height corresponding to the upper support plate 5.2, and the free end of the connecting spring 11 is in contact with the upper support plate 5.2; a second pressure sensor 12 is connected to the end of the connecting spring 11 that contacts the upper support plate 5.2; the second pressure sensor 12 is electrically connected to the controller.

[0047] In this embodiment, a group of support systems are arranged between the roof aluminum alloy lattice shell 2 and the roof steel lattice shell 1 along the annular interval, and the lower support plate 5.1 is welded and connected to the innermost ring beam of the roof steel lattice shell 1; the outermost ring beam of the roof aluminum alloy lattice shell 2 is fixedly connected to the upper support plate 5.2.

[0048] In this embodiment, two displacement control devices are provided on the support body, one on each side of the cable 4; of course, in other embodiments, in order to improve the displacement accuracy, four displacement control devices may also be provided, two on each side of the cable 4.

[0049] In this embodiment, the connecting spring 11 is a strong spring.

[0050] In this embodiment, the first-level limiting plate 6 and the second-level limiting plate 7 are connected to the upper transverse plate section 8.1 of the third-level limiting plate by bolts 15 respectively.

[0051] In this embodiment, the diameter of the pole 19 is much larger than the displacement of the upper support plate 5.2.

[0052] The support system with controllable displacement under tension includes the following steps.

[0053] Step 1: Before the cable 4 is tensioned, a set of displacement control devices is assembled.

[0054] Step 2: Connect the lower end of the three-stage limit plate 8 of the displacement control device to the lower support plate 5.1 until a set of displacement control devices is installed.

[0055] Step three: tension the cable 4 for the first time, and monitor the pressure measured by the first pressure sensor 9 on the primary limit plate 6 and the pressure measured by the second pressure sensor 12 of the angle monitoring device at the same time.

[0056] Step 4: If the pressure measured by the first pressure sensor 9 on the primary limit plate 6 and the pressure measured by the second pressure sensor 12 both meet the design requirements, the primary limit plate 6 is removed after the first tensioning is completed.

[0057] If the pressure measured by the first pressure sensor 9 on the primary limit plate 6 does not meet the design requirements, the automatic fixing mechanism is activated by the controller to prevent the upper support plate 5.2 from moving forward, and reinforcement measures are taken for the third limit plate 8 and the primary limit plate 6 at the same time; then the self-locking state of the automatic fixing mechanism is released by the controller.

[0058] If the pressure measured by the second pressure sensor 12 does not meet the design requirements, the tensioning direction of the cable 4 is adjusted so that the pressure measured by the second pressure sensor 12 meets the requirements.

[0059] Step 5: tension the cable 4 for a second time, while monitoring the pressure measured by the first pressure sensor 9 on the secondary limit plate 7 and the pressure measured by the second pressure sensor 12 on the angle monitoring device.

[0060] Step six: if the pressure measured by the first pressure sensor 9 on the secondary limit plate 7 and the pressure measured by the second pressure sensor 12 both meet the design requirements, remove the secondary limit plate 7 after the second tensioning is completed.

[0061] If the pressure measured by the first pressure sensor 9 on the secondary limit plate 7 does not meet the design requirements, the automatic fixing mechanism is activated by the controller to prevent the upper support plate 5.2 from moving forward, and reinforcement measures are taken for the tertiary limit plate 8 and the secondary limit plate 7 at the same time; then the self-locking state of the automatic fixing mechanism is released by the controller.

[0062] If the pressure measured by the second pressure sensor 12 does not meet the design requirements, the tensioning direction of the cable 4 is adjusted so that the pressure measured by the second pressure sensor 12 meets the requirements.

[0063] Step seven, tensioning the cable 4 for the third time, while monitoring the pressure measured by the first pressure sensor 9 on the third-level limit plate 8 and the pressure measured by the second pressure sensor 12 on the angle monitoring device.

[0064] Step eight: if the pressure measured by the first pressure sensor 9 on the three-level limit plate 8 and the pressure measured by the second pressure sensor 12 both meet the design requirements, the three-level limit plate 8 is removed after the third tensioning is completed.

[0065] If the pressure measured by the first pressure sensor 9 on the tertiary limit plate 8 does not meet the design requirements, the automatic fixing mechanism is activated by the controller to prevent the upper support plate 5.2 from moving forward, and at the same time, reinforcement measures are taken for the tertiary limit plate 8; then the self-locking state of the automatic fixing mechanism is released by the controller.

[0066] If the pressure measured by the second pressure sensor 12 does not meet the design requirements, the tensioning direction of the cable 4 is adjusted so that the pressure measured by the second pressure sensor 12 meets the requirements; the construction is now completed.

[0067] In this embodiment, the method for reinforcing the primary limiting plate 6 in step 4 is: a first blocking plate 16 is provided on the tertiary limiting plate 8 at an end of the primary limiting plate 6 away from the support body 5 .

[0068] In step six, the secondary limiting plate 7 is reinforced by providing a second blocking plate 18 on the tertiary limiting plate 8 at an end of the secondary limiting plate 7 away from the support body 5 .

[0069] The method for reinforcing the third-level limiting plate 8 in step 4, step 6 and step 8 is as follows: reinforcing connecting plates 14 are arranged at intervals on both sides of the lower horizontal plate section 8.3 of the third-level limiting plate 8 at the bottom of the lower support plate 5.1.

[0070] In this embodiment, during the three tensioning processes, if the pressure measured by the first pressure sensor 9 reaches the maximum allowable pressure value during design, it is a situation that meets the design requirements; if the pressure measured by the first pressure sensor 9 exceeds the maximum allowable pressure value during design, it is a situation that does not meet the design requirements.

[0071] In this embodiment, the pressure measured by the second pressure sensors on both sides of the cable is transmitted to the controller. Through real-time monitoring of the data, the difference between the numerical values ​​of every two symmetrically arranged second pressure sensors is calculated, and then the variance or standard deviation of all these calculated differences is taken to measure the overall discreteness. When the variance or standard deviation at a certain moment exceeds the design specified value, the angle of the corresponding cable is adjusted so that the cable can be accurately tensioned in the designed tensioning direction.

[0072] The above embodiments are not exhaustive of specific implementation methods, and there may be other embodiments. The purpose of the above embodiments is to illustrate the utility model rather than to limit the protection scope of the utility model. All applications derived from simple changes of the utility model fall within the protection scope of the utility model.

Claims

1. A support system with controllable displacement under tension, arranged between a roof steel lattice shell (1) and a roof aluminum alloy lattice shell (2); characterized in that: The roof steel grid shell (1) is a steel grid structure, and a circular installation opening (3) is reserved in the middle of the roof steel grid shell (1); the roof aluminum alloy grid shell (2) is installed at the installation opening (3) of the roof steel grid shell (1), and a cable (4) is provided on the outer ring beam on the roof aluminum alloy grid shell (2) at a position corresponding to the support system; the cable (4) is stretched along the radial direction of the roof aluminum alloy grid shell (2); the support system comprises a support body (5) and a displacement control device; the support body (5) comprises a lower support plate (5.1) and an upper support plate (5.2); the lower support plate (5.1) is installed on the roof steel grid shell (1); the roof aluminum alloy grid shell (2) is installed on the upper support plate (5.2); the side length of the lower support plate (5.1) is greater than the side length of the upper support plate (5.2), and the lower support plate (5.1) is provided with a displacement control device; the lower support plate (5.1) is provided with a displacement control device; the lower support plate (5.1) is provided with a displacement control device; the lower support plate (5.1) is provided with a displacement control device; the lower support plate (5.1) is provided with a displacement control device; the lower support plate (5.1) is provided with a displacement control device; the lower support plate (5.2 ...2) is provided with a displacement control device; the lower support plate (5.1) is provided with a displacement control device; the lower support plate (5.2) is A support block (5.3) is arranged in the middle of the top of the support block (5.1); the upper support plate (5.2) is installed on the top of the support block (5.3) and is slidable relative to the support block (5.3); the displacement control device has a group, which is arranged on the support body (5) at intervals along a direction perpendicular to the pulling direction of the cable (4), and the group of displacement control devices and the cable (4) are located on the same side of the support body (5); the displacement control device includes a primary limit plate (6), a secondary limit plate ( 7) and a three-stage limiting plate (8); the three-stage limiting plate (8) is C-shaped, and the lower end of the three-stage limiting plate (8) is connected to the lower support plate (5.1), and the upper end of the three-stage limiting plate (8) corresponds in height to the upper support plate (5.2); the first-stage limiting plate (6) and the second-stage limiting plate (7) are respectively horizontally detachably connected to both sides of the upper end of the three-stage limiting plate (8), and the end of the second-stage limiting plate (7) close to the support body (5) exceeds the corresponding position of the third-stage limiting plate (8) At one end, the end of the first-level limit plate (6) close to the support body (5) exceeds the end of the corresponding side of the second-level limit plate (7); a spacing is left between the first-level limit plate (6) and the upper support plate (5.2), and the width of the spacing is adapted to the distance that the upper support plate (5.2) is allowed to move when the first tension is applied to the cable (4); the length of the portion where the first-level limit plate (6) exceeds the second-level limit plate (7) is adapted to the distance that the upper support plate (5.2) is allowed to move when the second tension is applied to the cable (4); the length of the portion where the second-level limit plate (7) exceeds the third-level limit plate (8) is adapted to the distance that the upper support plate (5.2) is allowed to move when the third tension is applied to the cable (4); a first pressure sensor (9) is installed on the end surface of one end of the first-level limit plate (6), the second-level limit plate (7) and the third-level limit plate (8) close to the support body (5); the first pressure sensor (9) is connected to the controller by telecommunication.

2. The support system with controllable displacement under tension according to claim 1, characterized in that: The support body (5) is a spherical support or a sliding support.

3. The support system with controllable displacement under tension according to claim 1, characterized in that: The three-stage limit plate (8) comprises an upper horizontal plate section (8.1), a vertical plate section (8.2) and a lower horizontal plate section (8.3); the lower horizontal plate section (8.3) is pressed onto the bottom of the lower support plate (5.1) and is welded to the lower support plate (5.1); reinforcing connecting plates (14) are arranged at intervals at the bottom of the lower support plate (5.1) and on both sides of the lower horizontal plate section (8.3); the reinforcing connecting plates (14) are welded to the lower support plate (5.1) and the lower horizontal plate section (8.3); the first-stage limit plate (6) and the second-stage limit plate (7) are connected to both sides of the upper horizontal plate section (8.1) by bolts (15) respectively.

4. The support system with controllable displacement under tension according to claim 1, characterized in that: A spacing is left between the first-level limiting plate (6) and the end away from the support body (5) and the side edge of the corresponding side of the third-level limiting plate (8); a first groove (13) is provided on the third-level limiting plate (8) at a portion beyond the first-level limiting plate (6); a first blocking plate (16) is provided in the first groove (13), and the first blocking plate (16) blocks the corresponding end of the first-level limiting plate (6).

5. The support system with controllable displacement under tension according to claim 1, characterized in that: A gap is left between the secondary limiting plate (7) and the side edge of the end away from the support body (5) and the corresponding side of the tertiary limiting plate (8); a second groove (17) is provided on the tertiary limiting plate (8) at a portion beyond the secondary limiting plate (7); a second blocking plate (18) is provided in the second groove (17), and the second blocking plate (18) blocks the corresponding end of the secondary limiting plate (7).

6. The support system with controllable displacement under tension according to claim 1, characterized in that: An alarm device is also included; the alarm device is connected to the controller by telecommunication.

7. The support system with controllable displacement under tension according to claim 1, characterized in that: It also includes an automatic fixing mechanism; the automatic fixing mechanism is arranged on the left and right sides of the support block (5.3), and is an electromagnetic automatic fixing mechanism or a hydraulic automatic fixing mechanism; The electromagnetic automatic fixing mechanism comprises a pole (19), a forward coil (20), a reverse coil (21) and a first mounting plate (22); the forward coil (20) and the reverse coil (21) are respectively connected to the support block (5.3) and the upper support plate (5.2) via the first mounting plate (22), and one end of the forward coil (20) is connected to one end of the reverse coil (21), and the other end of the forward coil (20) and the other end of the reverse coil (21) are connected to a power source; A switch is provided in the formed circuit; the switch is electrically connected to the controller; a reset spring (23) is provided in each of the forward coil (20) and the reverse coil (21); there are two poles (19), which are respectively inserted into the reset springs (23) in the forward coil (20) and the reverse coil (21); limiting poles (24) are provided on opposite sides of the two poles (19), and the poles (19) are connected to the corresponding reset springs (23) through the limiting poles (24); when the circuit is closed, the two poles (19) are connected by electromagnetic force; The hydraulic automatic fixing mechanism comprises a hydraulic jack (25), a reaction plate (26) and a pressure plate (27); a second mounting plate (28) is provided on the left and right side surfaces of the support block (5.3) at a position close to the front side surface of the support block (5.3); the hydraulic jack (25) is mounted on the second mounting plate (28), and the telescopic end of the hydraulic jack (25) is arranged toward the rear side; the hydraulic jack (25) is electrically connected to the controller; the pressure plate (27) is mounted on the upper support plate (5.2) at a position close to the rear side surface of the support block (5.3), and the pressure plate (27) and the reaction plate (26) are arranged longitudinally correspondingly.

8. The support system with controllable displacement under tension according to claim 1, characterized in that: Angle monitoring devices are arranged at intervals on the lower support plate (5.1) and on both sides of the cable (4); the angle monitoring devices on both sides of the cable (4) are symmetrically arranged with respect to the cable; the angle monitoring device comprises a vertical support (10), a connecting spring (11) and a second pressure sensor (12); the vertical support (10) is connected to the lower support plate (5.1); the connecting spring (11) is fixed on the vertical support (10) at a height corresponding to the upper support plate (5.2), and the free end of the connecting spring (11) is in contact with the upper support plate (5.2); a second pressure sensor (12) is connected to the end of the connecting spring (11) that contacts the upper support plate (5.2); the second pressure sensor (12) is connected to the controller by telecommunication.

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