A deformation detection device for long-span building materials

Abstract

The present invention belongs to the field of solid deformation measurement, and specifically discloses a deformation detection device for long-span building materials, including a supporting mechanism, a compensating and increasing mechanism, a deformation detection mechanism, and a boosting actuator. The present invention creatively proposes a compensating and increasing mechanism, which can not only measure the deformation through the deformation detection mechanism at the bottom, but also convert the displacement of the long-span building material into the driving force of the clutch drive assembly, so that when the long-span building material is deformed, a part of the energy that should be wasted is recovered, and the boosting spring is compressed and compensated, which can reduce the elastic attenuation of the detection nut caused by the deformation of the long-span building material without long-term power-on to maintain pressure and save energy, thereby greatly reducing the attenuation amplitude of the pressure during long-term pressure application.

Description

Technical Field

[0001] The invention belongs to the technical field of solid deformation measurement, and in particular refers to a deformation detection device for long-span building materials. Background Art

[0002] There is usually a period of time between the arrival of building materials at the construction site and their installation. During this period, a place needs to be found for proper storage. During the storage process, the coordinate offset of the central feature point needs to be measured to provide feedback on the deformation of the building materials during long-span installation.

[0003] It is best to store in a way that simulates actual installation, such as using only two points to support the building materials from the bottom, with the distance between the two points equal to the span during actual installation, and placing a load in the middle that is suitable for the actual installation conditions. This has the following advantages:

[0004] A: Simulating actual working conditions can help identify many problems that may occur during actual installation in advance;

[0005] B: During the storage process, the deformation of building materials over time can be explored. If it exceeds the specifications, it can be discovered and adjusted in time. On the one hand, it can avoid damage to the entire building. On the other hand, it can also discover the problem as early as possible, leaving more time to solve the problem.

[0006] However, since the test lasts for a long time, from several weeks to several months, if a constant pressure is continuously applied through a motor, the energy consumption will be too high. Therefore, the best way to simulate the load is to use air pressure or hydraulic pressure (compared with actual heavy objects, it takes up less space and is more flexible to adjust). However, if the long-span building materials are deformed while the entire system is stable, the pressure on the load will inevitably decay. If the decay is too large, it will affect the accuracy of the entire test. Summary of the invention

[0007] In view of the above situation, in order to overcome the defects of the prior art, based on the above considerations, the present invention is the first to propose a deformation detection device for long-span building materials, which can support long-span building materials at two points from the bottom, can adjust the support spacing, and can apply loads on the top and sense the deformation amplitude of building materials in real time; in order to reduce the difficulty and resistance of pressure application, the hydraulic system generally adopts a hydraulic amplification structure similar to a jack, but this structure will cause the spring maintaining the hydraulic pressure to produce a large deformation amount and elastic force release when a small deformation occurs at the end; this will cause obvious pressure attenuation during the entire detection process.

[0008] In order to solve this problem, the present invention creatively proposes a compensation increase mechanism, which can not only measure the deformation amount through the deformation detection mechanism at the bottom, but also convert the displacement of the long-span building material into the driving force of the clutch drive assembly. Therefore, when the long-span building material is deformed, a part of the energy that would have been wasted is recovered, and the booster spring is compressed and compensated. It can reduce the elastic force attenuation of the detection nut caused by the deformation of the long-span building material without long-term power-on to maintain pressure and save energy, thereby greatly reducing the pressure attenuation amplitude during long-term pressure application.

[0009] The friction loss of each transmission part comes from the elastic force release of the booster spring; that is, the smaller the friction loss, the smaller the elastic force attenuation of the booster spring during the entire measurement process.

[0010] The technical solution adopted by the present invention is as follows: The present invention proposes a deformation detection device for long-span building materials, including a supporting mechanism, a compensating and increasing mechanism, a deformation detection mechanism and a boosting actuator, the supporting mechanism includes a frame assembly and a workpiece supporting assembly, the workpiece supporting assembly is arranged on the frame assembly, the compensating and increasing mechanism is arranged on the frame assembly, the deformation detection mechanism is arranged between the frame assembly and the workpiece supporting assembly, and the boosting actuator is arranged on the frame assembly.

[0011] By compensating for the deformation of the booster spring through this solution, it is possible to reduce the elastic force attenuation of the detection nut caused by the deformation of long-span building materials through adaptive compensation, without having to power on for a long time to maintain pressure and save energy, thereby reducing the pressure attenuation amplitude during long-term pressure application.

[0012] Furthermore, the frame assembly includes a sleeper, a rigid base and a gantry bracket, the rigid base is arranged on the sleeper, a center hole is provided at the center position of the rigid base, a sliding guide groove is provided on one side of the center hole, the gantry bracket is fixedly connected to the rigid base, and an internal threaded platform is provided on the gantry bracket.

[0013] Preferably, the workpiece support assembly includes a support base, an articulated support platform and a long-span building material, the support base is arranged on a rigid base, the articulated support platform is rotatably arranged on the support base, the long-span building material is placed on the articulated support platform, and the top end of the sensing piston contacts the bottom end of the long-span building material.

[0014] The articulated support platform can simulate the long-span working condition of two-point support, and because the angle of the articulated support platform is not restricted, after the long-span building material is bent, the articulated support platform can rotate to conform to the bending of the long-span building material without providing additional auxiliary support for the long-span building material.

[0015] Furthermore, the compensation increasing mechanism includes a boosting component, an elastic component, a rotational drive component and a clutch drive component, the boosting component is arranged on the gantry bracket, the elastic component is snap-fitted and slidably arranged in the boosting component, the rotational drive component is arranged at one end of the boosting component, and the clutch drive component is arranged on the gantry bracket.

[0016] Through the compensating and increasing mechanism, when the long-span building material is deformed, the deformation of the booster spring can be compensated by the downward pressure of the long-span building material, thereby reducing the elongation of the booster spring during the release of the elastic force, and then reducing the pressure attenuation during the continuous pressure process; theoretically speaking, the friction loss of each transmission part comes from the release of the elastic force of the booster spring; that is, the smaller the friction loss, the smaller the elastic force attenuation of the booster spring during the entire measurement process.

[0017] Preferably, the boosting assembly includes a sleeve bracket, a boosting sleeve and a boosting piston, the sleeve bracket is fixedly connected to the side of the gantry bracket, the boosting sleeve is snap-fitted in the sleeve bracket, the boosting sleeve is symmetrically provided with sleeve sliding groove portions, and the boosting piston is snap-fitted and slidably arranged in the boosting sleeve.

[0018] As a further preferred embodiment of the present invention, the elastic component includes a boosting plate, a boosting spring and an elastic force scale. The boosting plate is slidably arranged in the boosting sleeve. The boosting plate is symmetrically provided with sliding rod portions, and the sliding rod portions are snap-fitted and slidably arranged in the sleeve sliding groove portion. The boosting spring is arranged between the boosting piston and the boosting plate. The elastic force scale is fixedly connected to the boosting piston, and the elastic force scale is snap-fitted and slidably arranged in the boosting plate.

[0019] The inner diameter of the boost sleeve is much smaller than that of the detection sleeve. Therefore, the boost spring can apply a greater pressure to the middle part of the long-span building material at the sensing piston. By adjusting the position of the boost plate, the initial compression of the boost spring can be changed, and the applied pressure can be set. The compression of the boost spring can be fed back through the indication of the elastic scale.

[0020] Preferably, the rotary drive assembly comprises a boost drive nut, a boost drive stud, a spring mounting seat and a gear return spring; the boost drive nut is rotatably arranged at the bottom of the boost sleeve; the outer ring of the boost drive nut is evenly distributed with sliding guide grooves; the boost drive stud is fixedly connected to the boost plate; threaded transmission is provided between the boost drive nut and the boost drive stud; the spring mounting seat is fixedly connected to the outside of the boost sleeve; and the gear return spring is arranged on the spring mounting seat.

[0021] The boost drive stud can be driven to slide axially by rotating, thereby adjusting the position of the boost plate; through the elastic force of the spring mounting seat and the gear return spring, it can automatically reset when no axial force is actively applied to the clutch connector. After the clutch connector and the driven gear are combined, the boost drive nut can be driven to rotate through the clutch drive assembly.

[0022] As a further preferred embodiment of the present invention, the clutch drive assembly includes a gear bracket, a driven gear, an active rack and a clutch connector, the gear bracket is fixedly connected to the side of the gantry bracket, the driven gear is rotatably arranged on the gear bracket, the active rack is engaged and slidably arranged in the sliding guide groove, the active rack and the driven gear are meshed and transmitted, the inner ring of the clutch connector is annularly evenly distributed with sliding guide bosses matching the sliding guide grooves, the clutch connector is slidably arranged on the boost drive nut through the engagement of the sliding guide grooves and the sliding guide bosses, and a handle portion is also provided on the clutch connector, and the gear return spring is arranged between the spring mounting seat and the handle portion.

[0023] Through the meshing of the driven gear and the active rack, the driven gear can be driven to rotate when the active rack moves axially. Since the driven gear and the boost drive nut are connected by a clutch connector, during the deformation of the long-span building material, the boost drive nut can be rotated through the clutch connector through the sliding of the active rack, thereby further advancing the position of the boost plate and further compressing the boost spring; compressing the boost spring while releasing it can reduce the overall elongation of the boost spring, thereby reducing the pressure change amplitude of the pressure piston on the long-span building material.

[0024] Furthermore, the deformation detection mechanism includes a deformation sensing component and a deformation amount detection component, the deformation sensing component is arranged between the frame component and the workpiece support component, and the deformation amount detection component is arranged on the deformation sensing component; the deformation sensing component includes a detection sleeve and a branch push rod, the detection sleeve is arranged in the center hole, a branch cavity is provided on the side of the detection sleeve, the branch push rod is snap-fitted and slidably arranged in the branch cavity, and the branch push rod is fixedly connected to the active rack.

[0025] Preferably, the deformation sensing component also includes a sensing piston, a detection nut and a detection screw. The sensing piston is snap-fitted and slidably arranged in the detection sleeve. The detection nut is arranged at the bottom of the detection sleeve. The detection screw and the detection nut are threadedly connected. A return-to-zero piston part is provided at the top of the detection screw. The return-to-zero piston part is snap-fitted and slidably arranged in the detection sleeve.

[0026] By sensing the expansion and contraction changes of the sensing piston in the detection sleeve, the deformation of the middle position of the long-span building material relative to the rigid base can be fed back. When the sensing piston descends, on the one hand, the branch push rod can be extended to drive the active rack to slide and compensate for the deformation of the booster piston. On the other hand, the relative sliding of the fixed contact and the contact bracket can measure the descending distance of the sensing piston, and an alarm can be issued when the fixed contact and the movable contact are in contact.

[0027] As a further preferred embodiment of the present invention, the deformation amount detection component includes a fixed contact, a contact bracket and a movable contact, the fixed contact is arranged on the detection sleeve, the contact bracket is arranged on the sensing piston, the movable contact is slidably and adjustably arranged on the contact bracket, a triggered signal switch is also provided on the side of the fixed contact close to the contact bracket, and a grid capable of triggering the signal switch is arranged in an array on the contact bracket.

[0028] Furthermore, the boost actuator includes a pressure chamber, a pressure piston and a hydraulic pipeline. The pressure chamber is provided with an external thread, and the pressure chamber is threadedly connected through the external thread and the internal thread platform. The pressure chamber is provided with a handwheel part, and the pressure piston is slidably engaged in the pressure chamber. The bottom of the pressure piston is in contact with the middle position of the top of the long-span building material, and the pressure chamber and the boost sleeve are connected through a hydraulic pipeline.

[0029] By using a pressure chamber with a larger diameter, the liquid pressure at the booster piston can be amplified, thereby achieving the technical effect of simulating a load.

[0030] The beneficial effects achieved by the present invention using the above structure are as follows:

[0031] (1) By compensating the deformation of the booster spring in this scheme, it is possible to reduce the elastic force attenuation of the detection nut caused by the deformation of long-span building materials through adaptive compensation without having to keep the pressure on for a long time and saving energy, thereby reducing the pressure attenuation amplitude during long-term pressure application.

[0032] (2) The articulated support platform can simulate the long-span working condition of two-point support, and because the angle of the articulated support platform is not restricted, after the long-span building material is bent, the articulated support platform can rotate to conform to the bending of the long-span building material without providing additional auxiliary support for the long-span building material.

[0033] (3) When the long-span building material is deformed, the compensation mechanism can compensate for the deformation of the booster spring by pressing down on the long-span building material, thereby reducing the elongation of the booster spring during the release of its elastic force, and further reducing the pressure attenuation during continuous pressure application. Theoretically speaking, the friction loss of each transmission part comes from the release of the elastic force of the booster spring. In other words, the smaller the friction loss, the smaller the elastic force attenuation of the booster spring during the entire measurement process.

[0034] (4) The inner diameter of the booster sleeve is much smaller than that of the detection sleeve. Therefore, the booster spring can apply a greater pressure to the middle part of the long-span building material at the sensing piston. By adjusting the position of the booster plate, the initial compression of the booster spring can be changed, and the applied pressure can be set. The compression of the booster spring can be fed back through the indication of the elastic scale.

[0035] (5) The boost drive stud can be driven to slide axially by rotating it, thereby adjusting the position of the boost plate; through the elastic force of the spring mounting seat and the gear return spring, it can automatically reset when no axial force is actively applied to the clutch connector. After the clutch connector and the driven gear are combined, the boost drive nut can be driven to rotate through the clutch drive assembly.

[0036] (6) Through the meshing of the driven gear and the active rack, the driven gear can be driven to rotate when the active rack moves axially. Since the driven gear and the boost drive nut are connected by a clutch connector, during the deformation of the long-span building material, the active rack can slide and the boost drive nut can be rotated through the clutch connector, thereby further advancing the position of the boost plate and further compressing the boost spring. Compressing the boost spring while it is released can reduce the overall elongation of the boost spring, thereby reducing the pressure change amplitude of the pressure piston on the long-span building material.

[0037] (7) By sensing the expansion and contraction changes of the sensing piston in the detection sleeve, the deformation of the middle position of the long-span building material relative to the rigid base can be fed back. When the sensing piston descends, on the one hand, the branch push rod can be extended to drive the active rack to slide and compensate for the deformation of the booster piston. On the other hand, the relative sliding of the fixed contact and the contact bracket can be used to measure the descending distance of the sensing piston, and an alarm can be issued when the fixed contact and the movable contact are in contact.

[0038] (8) By using a pressure chamber with a larger diameter, the liquid pressure at the booster piston can be amplified, thereby achieving the technical effect of simulating load. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A three-dimensional diagram of a deformation detection device for long-span building materials proposed by the present invention;

[0040] Figure 2 This is a front view of a deformation detection device for long-span building materials proposed by the present invention;

[0041] Figure 3 This is a left view of a deformation detection device for long-span building materials proposed by the present invention;

[0042] Figure 4 A top view of a deformation detection device for long-span building materials proposed by the present invention;

[0043] Figure 5 for Figure 2 A cross-sectional view along the cutting line AA;

[0044] Figure 6 for Figure 3 A cross-sectional view along the cutting line BB;

[0045] Figure 7 for Figure 2 A cross-sectional view along the cutting line CC;

[0046] Figure 8 This is an exploded view of a deformation detection device for long-span building materials proposed by the present invention;

[0047] Fig. 9 for Figure 6 A partial enlarged view of point Ⅰ in the middle;

[0048] Fig.10 for Figure 7 A partial enlarged view of the middle II;

[0049] Fig.11 for Figure 8 A partial enlarged view of the middle part III;

[0050] Fig.12 for Figure 6 A partial enlarged view of point IV in the middle.

[0051] Among them, 1. Support mechanism, 2. Compensation increase mechanism, 3. Deformation detection mechanism, 4. Boost actuator, 5. Frame assembly, 6. Workpiece support assembly, 7. Sleeper, 8. Rigid base, 9. Gantry bracket, 10. Support base, 11. Articulated support platform, 12. Long span building materials, 13. Center hole, 14. Sliding guide groove, 15. Internal thread table, 16. Boost assembly, 17. Elastic assembly, 18. Rotary drive assembly, 19. Clutch drive assembly, 20. Sleeve bracket, 21. Boost sleeve, 22. Boost piston, 23. Boost plate, 24. Boost spring, 25. Elastic scale, 26. Boost drive nut, 27. Boost drive stud, 28. Spring Mounting seat, 29. Gear return spring, 30. Gear bracket, 31. Driven gear, 32. Active rack, 33. Clutch connector, 34. Sleeve slide groove portion, 35. Slide rod portion, 36. Sliding guide groove, 37. Handle portion, 38. Sliding guide boss, 39. Deformation sensing component, 40. Deformation detection component, 41. Detection sleeve, 42. Detection nut, 43. Detection screw, 44. Branch push rod, 45. Fixed contact, 46. Contact bracket, 47. Movable contact, 48. Branch cavity, 49. Zero return piston portion, 50. Induction piston, 51. Pressure cavity, 52. Pressure piston, 53. Hydraulic pipeline, 54. External thread, 55. Handwheel portion.

[0052] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0054] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0055] like Figure 1 to Figure 12As shown, the present invention proposes a deformation detection device for long-span building materials 12, including a support mechanism 1, a compensation and increase mechanism 2, a deformation detection mechanism 3 and a boost actuator 4, the support mechanism 1 includes a frame assembly 5 and a workpiece support assembly 6, the workpiece support assembly 6 is arranged on the frame assembly 5, the compensation and increase mechanism 2 is arranged on the frame assembly 5, the deformation detection mechanism 3 is arranged between the frame assembly 5 and the workpiece support assembly 6, and the boost actuator 4 is arranged on the frame assembly 5.

[0056] By compensating the deformation of the booster spring 24 through this solution, it is possible to reduce the elastic force attenuation of the detection nut 42 caused by the deformation of the long-span building material 12 through adaptive compensation without having to power on for a long time to maintain the pressure and save energy, thereby reducing the pressure attenuation amplitude during long-term pressure application.

[0057] The frame assembly 5 includes a sleeper 7, a rigid base 8 and a gantry bracket 9. The rigid base 8 is arranged on the sleeper 7. A center hole 13 is provided at the center position of the rigid base 8. A sliding guide groove 14 is provided on one side of the center hole 13. The gantry bracket 9 is fixedly connected to the rigid base 8. An internal threaded platform 15 is provided on the gantry bracket 9.

[0058] The workpiece support assembly 6 includes a support base 10, an articulated support platform 11 and a long-span building material 12. The support base 10 is arranged on the rigid base 8, the articulated support platform 11 is rotatably arranged on the support base 10, the long-span building material 12 is placed on the articulated support platform 11, and the top end of the sensing piston 50 contacts the bottom end of the long-span building material 12.

[0059] The articulated support platform 11 can simulate the long-span working condition of two-point support, and because the angle of the articulated support platform 11 is not restricted, after the long-span building material 12 is bent, the articulated support platform 11 can rotate to conform to the bending of the long-span building material 12 without providing additional auxiliary support for the long-span building material 12.

[0060] The boost actuator 4 includes a pressure chamber 51, a pressure piston 52 and a hydraulic pipeline 53. The pressure chamber 51 is provided with an external thread 54, and the pressure chamber 51 is threadedly connected to the internal thread platform 15 through the external thread 54. A hand wheel part 55 is provided on the pressure chamber 51. The pressure piston 52 is slidably arranged in the pressure chamber 51. The bottom of the pressure piston 52 is in contact with the middle position of the top of the long-span building material 12. The pressure chamber 51 and the boost sleeve 21 are connected through the hydraulic pipeline 53.

[0061] The hydraulic pressure at the booster piston 22 can be amplified by means of the pressure-applying cavity 51 with a larger diameter, thereby achieving the technical effect of simulating a load.

[0062] The deformation detection mechanism 3 includes a deformation sensing component 39 and a deformation amount detection component 40. The deformation sensing component 39 is arranged between the frame component 5 and the workpiece support component 6, and the deformation amount detection component 40 is arranged on the deformation sensing component 39; the deformation sensing component 39 includes a detection sleeve 41 and a branch push rod 44. The detection sleeve 41 is arranged in the center hole 13, and a branch cavity 48 is provided on the side of the detection sleeve 41. The branch push rod 44 is engaged and slidably arranged in the branch cavity 48, and the branch push rod 44 is fixedly connected to the active rack 32.

[0063] The deformation sensing component 39 also includes a sensing piston 50, a detection nut 42 and a detection screw 43. The sensing piston 50 is slidably engaged in the detection sleeve 41. The detection nut 42 is disposed at the bottom of the detection sleeve 41. The detection screw 43 and the detection nut 42 are threadedly connected. A return-to-zero piston portion 49 is disposed at the top of the detection screw 43. The return-to-zero piston portion 49 is slidably engaged in the detection sleeve 41.

[0064] By sensing the expansion and contraction changes of the sensing piston 50 in the detection sleeve 41, the deformation of the middle position of the long-span building material 12 relative to the rigid base 8 can be fed back. When the sensing piston 50 descends, on the one hand, the branch push rod 44 can be extended to drive the active rack 32 to slide and compensate for the deformation of the booster piston 22. On the other hand, the relative sliding of the fixed contact 45 and the contact bracket 46 can be used to measure the descending distance of the sensing piston 50, and an alarm can be issued when the fixed contact 45 and the movable contact 47 are in contact.

[0065] The deformation detection component 40 includes a fixed contact 45, a contact bracket 46 and a movable contact 47. The fixed contact 45 is arranged on the detection sleeve 41, the contact bracket 46 is arranged on the sensing piston 50, and the movable contact 47 is slidably and adjustably arranged on the contact bracket 46. A triggered signal switch is also provided on the side of the fixed contact 45 close to the contact bracket 46, and a grid that can trigger this signal switch is arranged in an array on the contact bracket 46.

[0066] The compensation increasing mechanism 2 includes a boosting assembly 16, an elastic assembly 17, a rotation driving assembly 18 and a clutch driving assembly 19. The boosting assembly 16 is arranged on the gantry bracket 9, the elastic assembly 17 is slidably arranged in the boosting assembly 16, the rotation driving assembly 18 is arranged at one end of the boosting assembly 16, and the clutch driving assembly 19 is arranged on the gantry bracket 9.

[0067] Through the compensating increasing mechanism 2, when the long-span building material 12 is deformed, the deformation of the boosting spring 24 can be compensated by the downward pressure of the long-span building material 12, thereby reducing the elongation of the boosting spring 24 during the release of the elastic force, and further reducing the pressure attenuation during the continuous pressure application process; theoretically speaking, the friction loss of each transmission part comes from the elastic release of the boosting spring 24; that is, the smaller the friction loss, the smaller the elastic attenuation of the boosting spring 24 during the entire measurement process.

[0068] The boosting assembly 16 includes a sleeve bracket 20, a boosting sleeve 21 and a boosting piston 22. The sleeve bracket 20 is fixedly connected to the side of the gantry bracket 9. The boosting sleeve 21 is snap-fitted into the sleeve bracket 20. The boosting sleeve 21 is symmetrically provided with a sleeve slide groove portion 34. The boosting piston 22 is snap-fitted and slidably arranged in the boosting sleeve 21.

[0069] The elastic component 17 includes a booster plate 23, a booster spring 24 and an elastic scale 25. The booster plate 23 is slidably arranged in the booster sleeve 21. The booster plate 23 is symmetrically provided with a sliding rod portion 35. The sliding rod portion 35 is snap-fitted and slidably arranged in the sleeve sliding groove portion 34. The booster spring 24 is arranged between the booster piston 22 and the booster plate 23. The elastic scale 25 is fixedly connected to the booster piston 22. The elastic scale 25 is snap-fitted and slidably arranged in the booster plate 23.

[0070] The inner diameter of the boost sleeve 21 is much smaller than the inner diameter of the detection sleeve 41. Therefore, the boost spring 24 can apply a greater pressure to the middle part of the long-span building material 12 at the sensing piston 50. By adjusting the position of the boost plate 23, the initial compression of the boost spring 24 can be changed, and the applied pressure can be set. The compression of the boost spring 24 can be fed back through the indication of the elastic scale 25.

[0071] The rotary drive assembly 18 includes a boost drive nut 26, a boost drive stud 27, a spring mounting seat 28 and a gear return spring 29. The boost drive nut 26 is rotatably arranged at the bottom of the boost sleeve 21. The outer ring of the boost drive nut 26 is evenly distributed with sliding guide grooves 36. The boost drive stud 27 is fixedly connected to the boost plate 23. The boost drive nut 26 and the boost drive stud 27 are threadedly transmitted. The spring mounting seat 28 is fixedly connected to the outside of the boost sleeve 21, and the gear return spring 29 is arranged on the spring mounting seat 28.

[0072] The boost drive stud 27 can be driven to slide axially by rotating, thereby adjusting the position of the boost plate 23; through the elastic force of the spring mounting seat 28 and the gear reset spring 29, it can automatically reset when no axial force is actively applied to the clutch connector 33. After the clutch connector 33 and the driven gear 31 are combined, the boost drive nut 26 can be driven to rotate through the clutch drive assembly 19.

[0073] The clutch drive assembly 19 includes a gear bracket 30, a driven gear 31, an active rack 32 and a clutch connector 33. The gear bracket 30 is fixed to the side of the gantry bracket 9, the driven gear 31 is rotatably arranged on the gear bracket 30, the active rack 32 is engaged and slidably arranged in the sliding guide groove 14, the active rack 32 and the driven gear 31 are engaged and transmitted, the inner ring of the clutch connector 33 is evenly distributed with sliding guide bosses 38 matching the sliding guide groove 36, the clutch connector 33 is slidably arranged on the boost drive nut 26 through the engagement of the sliding guide groove 36 and the sliding guide boss 38, and a handle portion 37 is also provided on the clutch connector 33, and a gear return spring 29 is arranged between the spring mounting seat 28 and the handle portion 37.

[0074] Through the meshing of the driven gear 31 and the active rack 32, the driven gear 31 can be driven to rotate when the active rack 32 moves axially. Since the driven gear 31 and the boost drive nut 26 are connected by the clutch connector 33, during the deformation of the long-span building material 12, the active rack 32 slides and the boost drive nut 26 can be rotated through the clutch connector 33, thereby further advancing the position of the boost plate 23 and further compressing the boost spring 24. Compressing the boost spring 24 while releasing it can reduce the overall elongation of the boost spring 24, thereby reducing the pressure change amplitude of the pressure piston 52 on the long-span building material 12.

[0075] When using it, the user first needs to place the long-span building material 12 on the two hinged support platforms 11, and make the center of the long-span building material 12 also located at the center of the two hinged support platforms 11;

[0076] Then, the clutch connector 33 is lifted up by holding the handle portion 37 to disengage the clutch connector 33 from the driven gear 31, and then the handle portion 37 is rotated to rotate the boost drive nut 26. At this time, since the clutch connector 33 and the driven gear 31 are disengaged, the driven gear 31 and the active rack 32 will not follow the movement. The boost plate 23 is adjusted to a position close to the sleeve slide groove portion 34 and then stopped. After releasing the handle portion 37, the clutch connector 33 will be reset.

[0077] Subsequently, according to the thickness of the long-span building material 12, the pressure chamber 51 is controlled to descend by rotating the hand wheel part 55. During the descent of the pressure chamber 51, the booster spring 24 is continuously compressed and the pressure applied to the long-span building material 12 by the pressure piston 52 is also continuously increased. By reading the relative positions of the elastic scale 25 and the booster plate 23, the current pressure value can be fed back until the pressure applied to the long-span building material 12 by the pressure piston 52 is adjusted to a suitable value.

[0078] In the initial state, the driven gear 31 is fixed first, and then the height of the zero return piston 49 is increased by rotating the detection screw 43 , and the sensing piston 50 rises accordingly until the top of the sensing piston 50 contacts the bottom of the long-span building material 12 .

[0079] The above-mentioned spiral transmission mechanisms all have a self-locking feature, that is, they can only drive axial movement through rotational movement, and cannot drive rotation in the opposite direction through axial movement; and the above-mentioned various manual rotation adjustment mechanisms can also be replaced with electric drive according to working conditions.

[0080] Finally, according to the detection requirements, the relative positions of the movable contact 47 and the contact support 46 are adjusted to a suitable value.

[0081] Subsequently, during the long-term continuous pressure application process, the deformation amount of the middle position of the long-span building material 12 can be detected. When the middle position of the long-span building material 12 bends and sinks, since the driving force of the sensing piston 50 is smaller than the pressure of the pressure piston 52, the long-span building material 12 will press the sensing piston 50 to retract toward the detection sleeve 41, and the sensing piston 50 will push out the branch push rod 44 in the branch cavity 48 when it descends. When the branch push rod 44 is extended, it slides with the active rack 32. Through the meshing of the driven gear 31 and the active rack 32, the driven gear 31 will also rotate with the boost drive nut 26 through the clutch connector 33, thereby causing the boost plate 23 to rise, and on the basis of the boost spring 24 being released and stretched, it is compensated and compressed; however, the deformation amount of the compensatory compression must be smaller than the deformation amount of the boost spring 24 being released and stretched.

[0082] Theoretically, the friction loss of each transmission part comes from the elastic release of the booster spring 24; that is, the smaller the friction loss, the smaller the elastic attenuation of the booster spring 24 during the entire measurement process; by recovering a part of the energy that would have been wasted during the elastic release process and compressing the booster spring 24, it is possible to reduce the elastic attenuation of the detection nut 42 caused by the deformation of the long-span building material 12 without having to power on for a long time to maintain pressure and save energy, thereby reducing the pressure attenuation amplitude during long-term pressure application.

[0083] During the sliding of the sensing piston 50 relative to the detection sleeve 41, the contact bracket 46 and the movable contact 47 will also slide relative to the fixed contact 45. The signal switch on the side of the fixed contact 45 will record once each time it passes through a grid on the contact bracket 46, thereby being able to provide real-time feedback on the deformation amplitude of the middle position of the long-span building material 12; when the deformation amplitude reaches the set upper limit, that is, when the fixed contact 45 and the movable contact 47 are in contact, an alarm will be triggered.

[0084] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0085] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A deformation detection device for long-span building materials, comprising a support mechanism (1), wherein the support mechanism (1) comprises a frame assembly (5) and a workpiece support assembly (6), wherein the workpiece support assembly (6) is arranged on the frame assembly (5); characterized in that: It also comprises a compensation adding mechanism (2), a deformation detection mechanism (3) and a pressure increasing actuator (4), wherein the compensation adding mechanism (2) is arranged on the frame assembly (5), the deformation detection mechanism (3) is arranged between the frame assembly (5) and the workpiece support assembly (6), and the pressure increasing actuator (4) is arranged on the frame assembly (5); The frame assembly (5) comprises a sleeper (7), a rigid base (8) and a gantry bracket (9), wherein the rigid base (8) is arranged on the sleeper (7), a center hole (13) is provided at the center position of the rigid base (8), a sliding guide groove (14) is provided on one side of the center hole (13), the gantry bracket (9) is fixedly connected to the rigid base (8), and an internal threaded platform (15) is provided on the gantry bracket (9); The compensation increasing mechanism (2) comprises a boosting component (16), an elastic component (17), a rotation driving component (18) and a clutch driving component (19), wherein the boosting component (16) is arranged on the gantry bracket (9), the elastic component (17) is slidably arranged in the boosting component (16), the rotation driving component (18) is arranged at one end of the boosting component (16), and the clutch driving component (19) is arranged on the gantry bracket (9); The boosting assembly (16) comprises a sleeve bracket (20), a boosting sleeve (21) and a boosting piston (22); the sleeve bracket (20) is fixedly connected to the side of the gantry bracket (9); the boosting sleeve (21) is snap-fitted into the sleeve bracket (20); sleeve sliding grooves (34) are symmetrically arranged on the boosting sleeve (21); and the boosting piston (22) is snap-fitted and slidably arranged in the boosting sleeve (21); The elastic force component (17) comprises a boosting plate (23), a boosting spring (24) and an elastic force scale (25); the boosting plate (23) is slidably arranged in the boosting sleeve (21); a sliding rod portion (35) is symmetrically arranged on the boosting plate (23); the sliding rod portion (35) is slidably arranged in the sleeve sliding groove portion (34); the boosting spring (24) is arranged between the boosting piston (22) and the boosting plate (23); the elastic force scale (25) is fixedly connected to the boosting piston (22); and the elastic force scale (25) is slidably arranged in the boosting plate (23); The rotary drive assembly (18) comprises a boost drive nut (26), a boost drive stud (27), a spring mounting seat (28) and a gear return spring (29); the boost drive nut (26) is rotatably arranged at the bottom of the boost sleeve (21); the outer ring of the boost drive nut (26) is evenly distributed with sliding guide grooves (36); the boost drive stud (27) is fixed to the boost plate (23); the boost drive nut (26) and the boost drive stud (27) are threadedly driven; the spring mounting seat (28) is fixed to the outside of the boost sleeve (21); and the gear return spring (29) is arranged on the spring mounting seat (28); The clutch drive assembly (19) comprises a gear support (30), a driven gear (31), an active rack (32) and a clutch connector (33); the gear support (30) is fixed to a side surface of the gantry support (9); the driven gear (31) is rotatably arranged on the gear support (30); the active rack (32) is slidably arranged in the sliding guide groove (14) in engagement; the active rack (32) and the driven gear (31) are meshed and transmitted; the inner ring of the clutch connector (33) is evenly distributed with sliding guide bosses (38) matching the sliding guide groove (36); the clutch connector (33) is slidably arranged on the boost drive nut (26) through the matching engagement of the sliding guide groove (36) and the sliding guide bosses (38); the clutch connector (33) is also provided with a handle portion (37); the gear return spring (29) is arranged between the spring mounting seat (28) and the handle portion (37); The deformation detection mechanism (3) comprises a deformation sensing component (39) and a deformation amount detection component (40); the deformation sensing component (39) is arranged between the frame component (5) and the workpiece support component (6); the deformation amount detection component (40) is arranged on the deformation sensing component (39); the deformation sensing component (39) comprises a detection sleeve (41) and a branch push rod (44); the detection sleeve (41) is arranged in the center hole (13); a branch cavity (48) is provided on the side of the detection sleeve (41); the branch push rod (44) is slidably arranged in the branch cavity (48); and the branch push rod (44) is fixedly connected to the active rack (32); The deformation sensing component (39) further comprises a sensing piston (50), a detection nut (42) and a detection screw (43); the sensing piston (50) is slidably mounted in the detection sleeve (41); the detection nut (42) is disposed at the bottom of the detection sleeve (41); the detection screw (43) and the detection nut (42) are threadedly connected; a zero return piston portion (49) is disposed at the top end of the detection screw (43); the zero return piston portion (49) is slidably mounted in the detection sleeve (41); The deformation amount detection component (40) comprises a fixed contact (45), a contact bracket (46) and a movable contact (47), wherein the fixed contact (45) is arranged on the detection sleeve (41), the contact bracket (46) is arranged on the sensing piston (50), the movable contact (47) is slidably and adjustably arranged on the contact bracket (46), a triggered signal switch is also arranged on a side of the fixed contact (45) close to the contact bracket (46), and a grid capable of triggering the signal switch is arranged in an array on the contact bracket (46); The pressure-boosting actuator (4) comprises a pressure chamber (51), a pressure piston (52) and a hydraulic pipeline (53); the pressure chamber (51) is provided with an external thread (54); the pressure chamber (51) is threadedly connected to an internal threaded platform (15) via the external thread (54); a hand wheel portion (55) is provided on the pressure chamber (51); the pressure piston (52) is slidably arranged in the pressure chamber (51); the bottom of the pressure piston (52) abuts against the middle position of the top of the long-span building material (12); and the pressure chamber (51) and the pressure-boosting sleeve (21) are connected through the hydraulic pipeline (53).

2. The deformation detection device for long-span building materials according to claim 1, characterized in that: The workpiece support assembly (6) comprises a support base (10), an articulated support platform (11) and a long-span building material (12); the support base (10) is arranged on a rigid base (8); the articulated support platform (11) is rotatably arranged on the support base (10); the long-span building material (12) is placed on the articulated support platform (11); and the top end of the sensing piston (50) contacts the bottom end of the long-span building material (12).

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