A tower crane boom deformation detection device

Abstract

The present invention belongs to the technical field of strength detection, and specifically discloses a tower crane boom deformation detection device, including a drooping direction compensation component, an adaptive damping adjustment mechanism, a mechanism to be tested, a deformation feedback component and a fixed detection base, wherein the drooping direction compensation component is arranged on the mechanism to be tested, the mechanism to be tested is arranged on the fixed detection base, the deformation feedback component is arranged on the drooping direction compensation component and the fixed detection base, and the adaptive damping adjustment mechanism is arranged on the mechanism to be tested. The present invention proposes a technical solution in which a floating valve core is suspended in an annular piston, which can further reduce the sliding resistance by increasing the gap at low speeds, and further increase the sliding resistance by reducing the gap at high speeds; not only that, the present invention also filters out invalid data generated when light is scanned by the length of the irradiation time, further improving the accuracy of the feedback results.

Description

Technical Field

[0001] The invention belongs to the technical field of strength detection, and specifically refers to a tower crane boom deformation detection device. Background Art

[0002] The boom of a tower crane is an important structural unit on the tower crane. Its structural strength and rigidity directly affect the rated weight that the tower crane can lift and the maximum operating range of the boom. Therefore, whether from the perspective of R&D and design or from the perspective of production inspection, it is necessary to test and inspect the structural strength of the boom of the tower crane.

[0003] Among the many detection methods, simulating the actual load and movement process of the tower crane and detecting the deformation of the boom in the process is relatively the most direct and effective detection method. However, the current detection devices still have areas that can be optimized, such as inconvenient measurement, low detection efficiency, and unstable detection results. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes a tower crane boom deformation detection device that can simulate the actual working conditions of the tower crane and detect the deformation of the boom in the process; in order to improve efficiency and accuracy, the present invention proposes a detection and measurement method for feedback of the descent amplitude of the hoisting position through a swing hammer that automatically adjusts the angle, and the greater the descent amplitude, the lower the stiffness of the tower crane boom to be detected; however, in this scheme, the swing hammer must be able to swing freely on the load moving slide, otherwise the swing hammer's own angle cannot be kept vertical during the bending process of the tower crane boom to be detected, and the free swing of the swing hammer will also make it difficult to stabilize the final feedback result; in order to overcome this technical contradiction, the present invention proposes an adaptive damping adjustment mechanism, which can achieve the effect of increasing the swing resistance of the swing hammer as the swing speed increases by circulating liquid in the gap;

[0005] However, the degree of freedom of artificial control of this effect is not high. For example, whether the relationship between resistance and speed is adjusted by changing the flow channel gap or changing the viscosity of the liquid, the result is either that the resistance at both low and high speeds increases, or that the resistance at both low and high speeds decreases.

[0006] In order to further solve the above problems, the present invention proposes a technical solution in which the floating valve core is suspended in the annular piston. On the basis of the above working conditions, the sliding resistance can be further reduced by increasing the gap at low speed, and the sliding resistance can be further increased by reducing the gap at high speed, thereby further strengthening the resistance difference between low speed and high speed.

[0007] Moreover, since the light emitting module will leave a lot of useless data on the light receiving module during the swinging process, in order to distinguish and screen these data, the present invention also proposes a feedback method of ultraviolet irradiation electronic fluorescent plate, which filters out the invalid data generated when the light scans by the length of irradiation time, thereby further improving the accuracy of the feedback results.

[0008] The technical solution adopted by the present invention is as follows: The present invention proposes a tower crane boom deformation detection device, including a drooping direction compensation component, an adaptive damping adjustment mechanism, a mechanism to be tested, a deformation feedback component and a fixed detection base, the drooping direction compensation component is arranged on the mechanism to be tested, the mechanism to be tested is arranged on the fixed detection base, the deformation feedback component is arranged on the drooping direction compensation component and the fixed detection base, and the adaptive damping adjustment mechanism is arranged on the mechanism to be tested.

[0009] Furthermore, the drooping direction compensation component includes a swing base, a swing shaft, a swing hammer and a windproof cover, the swing base is arranged at the bottom of the movable counterweight assembly, the swing hammer is provided with a pendulum hinge seat, the swing hammer is rotatably arranged on the swing base through the pendulum hinge seat, the swing base and the pendulum hinge seat are connected by a swing shaft, the windproof cover is arranged at the bottom of the movable counterweight assembly, the adaptive damping adjustment mechanism is arranged in the windproof cover, one side of the windproof cover is provided with an arc-shaped light-transmitting glass, and the windproof cover coincides with the center position of the swing shaft.

[0010] Through the adaptive swing of the swing hammer, the swing hammer can always be kept in a vertical state, and the light emitting module located on the swing hammer hinge seat can always be kept horizontal, thereby ensuring the accuracy of light sensing; on the other hand, since the center positions of the curved transparent glass and the swing shaft coincide, even if the swing hammer has not completely stopped, the light passing through the curved transparent glass is always perpendicular to the curved transparent glass, thereby overcoming the influence of refraction on light propagation.

[0011] Furthermore, the adaptive damping adjustment mechanism includes an articulated telescopic component, a liquid compensation component and an automatic gap adjustment component, the articulated telescopic component is arranged at the bottom of the movable counterweight component, the liquid compensation component is arranged in the articulated telescopic component, and the automatic gap adjustment component is arranged in the articulated telescopic component.

[0012] The adaptive damping adjustment mechanism can not only achieve the technical effect of increasing the telescopic resistance as the telescopic speed increases through the liquid flow resistance, but also, on this basis, through the suspended annular piston design, during the telescopic process, the gap between the annular piston and the floating valve core changes, thereby further enhancing the above effect and achieving the technical effect of "further reducing the telescopic resistance at low speed and further increasing the telescopic resistance at high speed".

[0013] Preferably, the articulated telescopic assembly includes an annular hinge, a top articulated seat, a telescopic cylinder and a telescopic push rod, the annular hinge is fixed to the bottom of the swing hammer, bottom articulated seats are symmetrically provided at both ends of the annular hinge, the top articulated seat is fixed to the movable counterweight assembly, the telescopic cylinder is hinged to the top articulated seat, the telescopic push rod is hinged to the bottom articulated seat, and the telescopic push rod is snap-fitted and slidably arranged in the telescopic cylinder.

[0014] As a further preferred embodiment of the present invention, the liquid compensation assembly includes a liquid compensation piston and a liquid compensation spring, the telescopic push rod is provided with a countersunk blind hole, the liquid compensation piston is snap-fitted and slidably arranged in the countersunk blind hole, and the liquid compensation spring is arranged between the bottom of the countersunk blind hole and the liquid compensation piston.

[0015] During the extension and retraction of the articulated telescopic assembly, the actual space used to store liquid in the telescopic cylinder will change due to the change in the length of the telescopic push rod invading the telescopic cylinder. However, the liquid is almost incompressible. Therefore, through the sliding compensation of the liquid compensation piston, it can be ensured that the telescopic cylinder is always filled with liquid and will not get stuck due to the incompressibility of the liquid.

[0016] As a further preferred embodiment of the present invention, the automatic clearance adjustment component includes an annular piston, a floating valve core, a spring bracket and a valve core return spring. The annular piston is slidably arranged in the telescopic cylinder body. The annular piston is provided with a piston middle groove. Both ends of the piston middle groove are symmetrically provided with piston slope portions. The floating valve core is located in the piston middle groove. Both ends of the floating valve core are provided with valve core slope portions matching the piston slope portions. The spring brackets are symmetrically arranged at both ends of the annular piston. One of the spring brackets is fixedly connected to the telescopic push rod. The valve core return spring is arranged between the spring bracket and the floating valve core. The spring bracket is provided with a central through hole and side through grooves for liquid circulation.

[0017] The design of floating valve core suspended relative to the annular piston actually strengthens the resistance difference at low speed and high speed, solving the problem that ordinary adjustment scheme can only increase or decrease the resistance as a whole in equal proportion.

[0018] Furthermore, the structure to be tested includes a tower crane boom assembly and a movable counterweight assembly, the tower crane boom assembly is arranged on a fixed detection base, and the movable counterweight assembly is arranged on the tower crane boom assembly.

[0019] Preferably, the tower crane boom assembly includes a tower crane boom to be tested and a fixed counterweight block, the tower crane boom to be tested is arranged on a swing base, one side of the tower crane boom to be tested is provided with a load moving guide rail, and the fixed counterweight block is arranged on the other side of the tower crane boom to be tested.

[0020] As a further preferred embodiment of the present invention, the movable counterweight assembly includes a load moving slider, a load moving slide plate and a movable counterweight load, the load moving slider is slidably engaged on the load moving guide rail, the load moving slide plate is fixedly connected to the bottom of the load moving slider, the movable counterweight load is arranged at the bottom of the load moving slide plate, and the swing base, top hinged seat and windproof outer cover are all arranged at the bottom of the load moving slide plate.

[0021] After installing the tower crane boom to be tested of a specific length on the swing base, the load conditions during use can be simulated by moving the counterweight load. In this case, the technical purpose of measuring the strength and stiffness of the tower crane boom to be tested can be achieved by monitoring and feedback of the deformation of the tower crane boom to be tested.

[0022] Furthermore, the deformation feedback component includes a light receiving module and a light emitting module, the light receiving module is arranged on the side of the fixed detection base, the light emitting module is arranged on the pendulum hinge seat, the straight line where the light emitted by the light emitting module is located intersects with the central axis of the swing shaft, and the straight line where the light emitted by the light emitting module is located is perpendicular to the swing hammer.

[0023] Preferably, the light emitting module is a laser emitter, and the light receiving module is a laser receiver. The light receiving module can provide real-time feedback on the coordinate position of the light emitted by the light emitting module onto the light receiving module, and feed it back to the background.

[0024] By recording and integrating the laser irradiation position in the background, it is possible to know the laser irradiation point after the drooping direction compensation component is stabilized, thereby providing feedback on the amplitude of the downward deformation of the position where the moving counterweight load is located in the current state.

[0025] The light emitting module is an ultraviolet emitter, and the light receiving module includes a dark box, a reflector, an electronic fluorescent plate and a grid. The dark box is provided with a light inlet, the reflector is arranged in the dark box, the electronic fluorescent plate is arranged in the dark box, the grid array is arranged in the dark box, and the grids are distributed in a longitudinal array.

[0026] The characteristic that the brightness of the electronic fluorescent panel will continue to increase when exposed to light for a long time is utilized to avoid the interference problem of light "scanning" of the drooping direction compensation component in an unstable state. Only when the brightness of a certain position of the electronic fluorescent panel reaches a certain level will the coordinates of this position be fed back to the background. The interference of external ambient light can be reduced through the dark box, and the light with too large an angle can be automatically filtered out through the grille.

[0027] The beneficial effects achieved by the present invention using the above structure are as follows:

[0028] (1) The adaptive swing of the pendulum hammer can keep the pendulum hammer in a vertical position at all times, thereby keeping the light emitting module located on the pendulum hammer hinge seat horizontal at all times, thereby ensuring the accuracy of light sensing. On the other hand, since the center positions of the curved light-transmitting glass and the swing shaft coincide with each other, even if the pendulum hammer has not completely stopped, the light passing through the curved light-transmitting glass is always perpendicular to the curved light-transmitting glass, thereby overcoming the influence of refraction on light propagation.

[0029] (2) The adaptive damping adjustment mechanism can not only achieve the technical effect that the telescopic resistance increases with the increase of the telescopic speed through the liquid flow resistance, but also, on this basis, through the suspended annular piston design, during the telescopic process, the gap between the annular piston and the floating valve core changes, thereby further enhancing the above effect and achieving the technical effect of "further reducing the telescopic resistance at low speed and further increasing the telescopic resistance at high speed".

[0030] (3) During the extension and retraction of the articulated telescopic assembly, the actual space used to store the liquid in the telescopic cylinder changes due to the change in the length of the telescopic push rod that penetrates into the telescopic cylinder. Since the liquid is almost incompressible, the sliding compensation of the liquid compensation piston can keep the telescopic cylinder filled with liquid at all times without getting stuck due to the incompressibility of the liquid.

[0031] (4) The design of floating valve core suspended relative to the annular piston actually strengthens the resistance difference between low speed and high speed, solving the problem that ordinary adjustment schemes can only increase or decrease the resistance in proportion as a whole.

[0032] (5) After the boom of the tower crane to be tested of a specific length is installed on the swing base, the load conditions during use can be simulated by moving the counterweight load. In this case, the technical purpose of measuring the strength and stiffness of the boom of the tower crane to be tested can be achieved by monitoring and providing feedback on the deformation of the boom of the tower crane to be tested.

[0033] (6) By recording and integrating the laser irradiation position in the background, the laser irradiation point after the drooping direction compensation component is stabilized can be known, thereby providing feedback on the amplitude of the downward deformation of the position where the moving counterweight load is located in the current state.

[0034] (7) The characteristic that the brightness of the electronic fluorescent panel will continue to increase when exposed to light for a long time is utilized to avoid the interference problem of light "scanning" of the drooping direction compensation component in an unstable state. Only when the brightness of a certain position of the electronic fluorescent panel reaches a certain level will the coordinates of the position be fed back to the background. The interference of external ambient light can be reduced through the dark box, and the light with a large inclination angle can be automatically filtered out through the grille. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A three-dimensional diagram of a tower crane boom deformation detection device proposed by the present invention;

[0036] Figure 2 This is a front view of a tower crane boom deformation detection device proposed by the present invention;

[0037] Figure 3 This is a left view of a tower crane boom deformation detection device proposed by the present invention;

[0038] Figure 4 for Figure 3 A cross-sectional view along the cutting line AA;

[0039] Figure 5 for Figure 4 A cross-sectional view along the cutting line BB;

[0040] Figure 6 A schematic diagram of the explosion structure of a tower crane boom deformation detection device proposed by the present invention;

[0041] Figure 7 for Figure 4 A partial enlarged view of point Ⅰ in the middle;

[0042] Figure 8 for Figure 4 A partial enlarged view of the middle II;

[0043] Fig. 9 for Figure 6 A partial enlarged view of the middle part III;

[0044] Fig.10 for Figure 5 A partial enlarged view of the middle IV;

[0045] Fig.11 Schematic diagram of the relationship between speed and resistance when the articulated telescopic component is extended and retracted.

[0046] Among them, 1. drooping direction compensation component, 2. adaptive damping adjustment mechanism, 3. mechanism to be tested, 4. deformation feedback component, 5. fixed detection base, 6. swing base, 7. swing shaft, 8. swing hammer, 9. pendulum hinge seat, 10. hinged telescopic component, 11. liquid compensation component, 12. automatic gap adjustment component, 13. annular hinge, 14. top hinge seat, 15. telescopic cylinder, 16. telescopic push rod, 17. liquid compensation piston, 18. liquid compensation spring, 19. annular piston, 20. floating valve core, 21. spring bracket, 22. valve core reset spring, 23. bottom hinge Connector, 24, countersunk blind hole, 25, piston middle groove, 26, piston slope, 27, valve core slope, 28, center through hole, 29, side through groove, 30, tower crane boom assembly, 31, mobile counterweight assembly, 32, tower crane boom to be tested, 33, fixed counterweight block, 34, load moving slider, 35, load moving slide plate, 36, mobile counterweight load, 37, load moving guide rail, 38, light receiving module, 39, light emitting module, 40, dark box, 41, reflector, 42, electronic fluorescent plate, 43, grille, 44, light inlet, 45, windproof cover, 46, curved light-transmitting glass.

[0047] 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

[0048] 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.

[0049] 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.

[0050] like Figure 1 to Figure 10As shown, the present invention proposes a tower crane boom deformation detection device, including a drooping direction compensation component 1, an adaptive damping adjustment mechanism 2, a mechanism to be tested 3, a deformation feedback component 4 and a fixed detection base 5, the drooping direction compensation component 1 is arranged on the mechanism to be tested 3, the mechanism to be tested 3 is arranged on the fixed detection base 5, the deformation feedback component 4 is arranged on the drooping direction compensation component 1 and the fixed detection base 5, and the adaptive damping adjustment mechanism 2 is arranged on the mechanism to be tested 3.

[0051] The mechanism to be tested 3 includes a tower crane boom assembly 30 and a movable counterweight assembly 31 . The tower crane boom assembly 30 is arranged on a fixed detection base 5 , and the movable counterweight assembly 31 is arranged on the tower crane boom assembly 30 .

[0052] The tower crane boom assembly 30 includes a tower crane boom 32 to be tested and a fixed counterweight 33. The tower crane boom 32 to be tested is arranged on a swing base 6. A load moving guide rail 37 is provided on one side of the tower crane boom 32 to be tested, and the fixed counterweight 33 is arranged on the other side of the tower crane boom 32 to be tested.

[0053] The movable counterweight assembly 31 includes a load moving slider 34, a load moving slide plate 35 and a movable counterweight load 36. The load moving slider 34 is slidably engaged on the load moving guide rail 37. The load moving slide plate 35 is fixedly connected to the bottom of the load moving slider 34. The movable counterweight load 36 is arranged at the bottom of the load moving slide plate 35. The swing base 6, the top hinged seat 14 and the windproof outer cover 45 are all arranged at the bottom of the load moving slide plate 35.

[0054] After the tower crane boom 32 to be tested of a specific length is installed on the swing base 6, the load condition during use can be simulated by moving the counterweight load 36. In this case, the technical purpose of measuring the strength and stiffness of the tower crane boom 32 to be tested can be achieved by monitoring and feeding back the deformation of the tower crane boom 32 to be tested.

[0055] The deformation feedback component 4 includes a light receiving module 38 and a light emitting module 39. The light receiving module 38 is arranged on the side of the fixed detection base 5, and the light emitting module 39 is arranged on the pendulum hinge seat 9. The straight line where the light emitted by the light emitting module 39 is located intersects with the central axis of the swing shaft 7, and the straight line where the light emitted by the light emitting module 39 is located is perpendicular to the swing hammer 8.

[0056] The light emitting module 39 is a laser emitter, and the light receiving module 38 is a laser receiver. The light receiving module 38 can provide real-time feedback on the coordinate position of the light emitted by the light emitting module 39 irradiating the light receiving module 38 and feed it back to the background.

[0057] By recording and integrating the laser irradiation position in the background, the laser irradiation point position after the drooping direction compensation component 1 is stabilized can be known, thereby feeding back the amplitude of the downward deformation of the position of the moving counterweight load 36 in the current state.

[0058] The light emitting module 39 is an ultraviolet emitter, and the light receiving module 38 includes a dark box 40, a reflector 41, an electronic fluorescent plate 42 and a grille 43. The dark box 40 is provided with a light inlet 44, the reflector 41 is arranged in the dark box 40, the electronic fluorescent plate 42 is arranged in the dark box 40, and the grille 43 is arranged in an array in the dark box 40, and the grilles 43 are distributed in a longitudinal array.

[0059] By utilizing the characteristic that the brightness of the electronic fluorescent plate 42 will continue to increase when exposed to light for a long time, the interference problem of light "scanning" in the unstable state of the drooping direction compensation component 1 can be avoided. Only when the brightness of a certain position of the electronic fluorescent plate 42 reaches a certain level, the coordinates of the position will be fed back to the background. The dark box 40 can reduce the interference of external ambient light, and the grille 43 can automatically filter out light with a large inclination angle.

[0060] The drooping direction compensation component 1 includes a swing base 6, a swing shaft 7, a swing hammer 8 and a windproof cover 45. The swing base 6 is arranged at the bottom of the movable counterweight assembly 31. The swing hammer 8 is provided with a pendulum hinge seat 9. The swing hammer 8 is rotatably arranged on the swing base 6 through the pendulum hinge seat 9. The swing base 6 and the pendulum hinge seat 9 are connected by a swing shaft 7. The windproof cover 45 is arranged at the bottom of the movable counterweight assembly 31. The adaptive damping adjustment mechanism 2 is arranged in the windproof cover 45. An arc-shaped light-transmitting glass 46 is provided on one side of the windproof cover 45. The center position of the windproof cover 45 coincides with the center position of the swing shaft 7.

[0061] Through the adaptive swing of the swing hammer 8, the swing hammer 8 can always be kept in a vertical state, and the light emitting module 39 located on the swing hammer hinge seat 9 can always be kept horizontal, thereby ensuring the accuracy of light sensing; on the other hand, since the center positions of the curved light-transmitting glass 46 and the swing shaft 7 coincide with each other, even if the swing hammer 8 has not yet completely stopped, the light passing through the curved light-transmitting glass 46 is always perpendicular to the curved light-transmitting glass 46, thereby overcoming the influence of refraction on light propagation.

[0062] The adaptive damping adjustment mechanism 2 includes an articulated telescopic assembly 10, a liquid compensation assembly 11 and an automatic gap adjustment assembly 12. The articulated telescopic assembly 10 is arranged at the bottom of the movable counterweight assembly 31, the liquid compensation assembly 11 is arranged in the articulated telescopic assembly 10, and the automatic gap adjustment assembly 12 is arranged in the articulated telescopic assembly 10.

[0063] The adaptive damping adjustment mechanism 2 can not only achieve the technical effect that the telescopic resistance increases with the increase of the telescopic speed through the liquid flow resistance, but also, on this basis, through the suspended annular piston 19 design, during the telescopic process, the gap between the annular piston 19 and the floating valve core 20 changes, thereby further enhancing the above effect and achieving the technical effect of "further reducing the telescopic resistance at low speed and further increasing the telescopic resistance at high speed".

[0064] The articulated telescopic assembly 10 includes an annular hinge 13, a top articulated seat 14, a telescopic cylinder 15 and a telescopic push rod 16. The annular hinge 13 is fixedly connected to the bottom of the swing hammer 8. Bottom articulated seats 23 are symmetrically provided at both ends of the annular hinge 13. The top articulated seat 14 is fixedly connected to the movable counterweight assembly 31. The telescopic cylinder 15 is articulated with the top articulated seat 14. The telescopic push rod 16 is articulated with the bottom articulated seat 23. The telescopic push rod 16 is slidably arranged in the telescopic cylinder 15.

[0065] The liquid compensation assembly 11 includes a liquid compensation piston 17 and a liquid compensation spring 18. A countersunk blind hole 24 is provided on the telescopic push rod 16. The liquid compensation piston 17 is slidably engaged in the countersunk blind hole 24. The liquid compensation spring 18 is provided between the bottom of the countersunk blind hole 24 and the liquid compensation piston 17.

[0066] During the extension and retraction of the articulated telescopic assembly 10, the length of the telescopic push rod 16 intruding into the telescopic cylinder 15 changes, resulting in a change in the space actually used to store liquid in the telescopic cylinder 15. Since the liquid is almost incompressible, the sliding compensation of the liquid compensation piston 17 can ensure that the telescopic cylinder 15 is always filled with liquid and does not get stuck due to the incompressibility of the liquid.

[0067] The automatic clearance adjustment component 12 includes an annular piston 19, a floating valve core 20, a spring bracket 21 and a valve core return spring 22. The annular piston 19 is slidably arranged in the telescopic cylinder body 15. A piston middle groove 25 is provided on the annular piston 19. Piston slope portions 26 are symmetrically provided at both ends of the piston middle groove 25. The floating valve core 20 is located in the piston middle groove 25. Valve core slope portions 27 matching the piston slope portions 26 are provided at both ends of the floating valve core 20. The spring brackets 21 are symmetrically arranged at both ends of the annular piston 19. One of the spring brackets 21 is fixedly connected to the telescopic push rod 16. The valve core return spring 22 is arranged between the spring bracket 21 and the floating valve core 20. The spring bracket 21 is provided with a central through hole 28 and a side through groove 29 for liquid circulation.

[0068] The design of floating valve core 20 being suspended relative to annular piston 19 actually strengthens the resistance difference between low speed and high speed, solving the problem that ordinary adjustment schemes can only increase or decrease the resistance as a whole in proportion.

[0069] like Fig.11 As shown, the horizontal axis represents the speed of the articulated telescopic assembly when it is extended and retracted, and the vertical axis represents the resistance of the articulated telescopic assembly when it is extended and retracted. Assuming that the annular piston 19 and the floating valve core 20 are relatively stationary, the relationship curve between the two is a solid line a. If the flow channel is increased or the fluidity of the liquid is reduced, the curve will be transformed into a dotted line b. If the flow channel is reduced or the fluidity of the liquid is increased, the curve will be transformed into a dotted line c. That is, the traditional resistance adjustment method is manifested as an overall increase or decrease in resistance. However, through the relative floating design of the annular piston 19 and the floating valve core 20, the curve can be transformed into a dotted line d. That is, on the basis of curve a, the sliding resistance is further reduced by increasing the gap at low speed, and the sliding resistance is further increased by reducing the gap at high speed. The resistance gap at low speed and high speed is further strengthened.

[0070] During specific use, the user first needs to install the tower crane boom 32 to be tested of a specific length on the swing base 6, and install and fix the fixed counterweight block 33 and the movable counterweight assembly 31. Through an external traction device, the load moving slide 35 can be towed to slide along the load moving guide rail 37. Generally speaking, during the test process, the load moving slide 35 is slid from the position closest to the swing base 6 to the position farthest from the swing base 6, and in order to leave the required time for the swing hammer 8 to swing from stationary, an intermittent sliding form is generally adopted.

[0071] The load-moving slide 35 stops after sliding a unit distance from one position. Although the adaptive damping adjustment mechanism 2 has the effect of suppressing swinging, the swing hammer 8 still needs to swing before it can return to a stationary state. Finally, the swing hammer 8 will be stationary in a state perpendicular to the ground. At this time, the light emitting module 39 is in a horizontal state; the windproof cover 45 can eliminate the influence of airflow in the external air on the swing hammer 8.

[0072] The working process of the adaptive damping adjustment mechanism 2 is as follows: when the swing hammer 8 swings, the adaptive damping adjustment mechanism 2 will be extended and retracted. When the adaptive damping adjustment mechanism 2 is extended and retracted, the length of the telescopic push rod 16 intruding into the telescopic cylinder 15 will change, causing the actual volume inside the telescopic cylinder 15 to change. At this time, the sliding compensation of the liquid compensation piston 17 can ensure that the telescopic cylinder 15 is always filled with liquid and will not be stuck due to the incompressibility of the liquid.

[0073] When the articulated telescopic assembly 10 is extended or retracted, the floating valve core 20 is affected by the thrust of the liquid and will slide relative to the annular piston 19, and the magnitude of the relative sliding is related to the speed of the extension or retraction;

[0074] On the one hand, assuming that the annular piston 19 and the floating valve core 20 are relatively stationary, the sliding resistance of the annular piston 19 in the telescopic cylinder 15 will also increase with the increase of the sliding speed. However, at this time, whether the relationship between the resistance and the speed is adjusted by changing the flow channel gap or changing the viscosity of the liquid, the result is that the resistance at both low and high speeds increases, or the resistance at both low and high speeds decreases.

[0075] The floating valve core 20 floats in the annular piston 19, based on the above working conditions, can further reduce the sliding resistance by increasing the gap at low speed, and further increase the sliding resistance by reducing the gap at high speed, thereby further strengthening the resistance difference between low speed and high speed.

[0076] By arranging an angle sensor between the swing base 6 and the swing hammer 8, the local bending angle of the tower crane boom 32 to be detected in the current state can be fed back.

[0077] The process of measuring feedback is as follows:

[0078] Embodiment 1: The light emitting module 39 is a laser emitter, and the light receiving module 38 is a laser receiver. The light receiving module 38 can provide real-time feedback on the coordinate position of the light emitted by the light emitting module 39 irradiating the light receiving module 38, and feed it back to the background; the background will eventually generate a trajectory coordinate diagram of the laser irradiation, and by statistically analyzing the scattered point distribution on the coordinates, it is possible to judge the irradiation position of the laser in a static state. The densely distributed positions in the figure indicate the irradiation position of the laser when the swing hammer 8 is stationary at each measuring point. By reading the position coordinates, the bending condition of the tower crane boom 32 to be tested at this position can be judged.

[0079] Embodiment 2: The light emitting module 39 is an ultraviolet emitter, and the light receiving module 38 includes a dark box 40, a reflector 41, an electronic fluorescent plate 42 and a grid 43. At this time, if the horizontal angle of the light emitting module 39 is too large when swinging, the light will irradiate the grid 43 and be absorbed by the grid 43, and the electronic fluorescent plate 42 will not react;

[0080] When the light emitting module 39 follows the swing of the swinging hammer 8, there will inevitably be a moment when the light sweeps across the electronic fluorescent plate 42. However, since the brightness of the electronic fluorescent plate 42 gradually increases after being illuminated by the light emitting module 39, the electronic fluorescent plate 42 will not react when the light sweeps across quickly.

[0081] Only after the swinging hammer 8 comes to rest, the light from the light emitting module 39 will continue to irradiate the same position, at which time the brightness of the position where the electronic fluorescent plate 42 is irradiated by the light will continue to increase. When the brightness increases to a certain level, the electronic fluorescent plate 42 will feed back the coordinates of the point to the background;

[0082] In the above process, the light can be reflected by the reflector 41 , and the influence of the external ambient light on the electronic fluorescent plate 42 can be reduced by the dark box 40 .

[0083] 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.

[0084] 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 tower crane boom deformation detection device, characterized in that: The invention comprises a drooping direction compensation component (1), an adaptive damping adjustment mechanism (2), a mechanism to be tested (3), a deformation feedback component (4) and a fixed detection base (5), wherein the drooping direction compensation component (1) is arranged on the mechanism to be tested (3), the mechanism to be tested (3) is arranged on the fixed detection base (5), the deformation feedback component (4) is arranged on the drooping direction compensation component (1) and the fixed detection base (5), and the adaptive damping adjustment mechanism (2) is arranged on the mechanism to be tested (3); The structure to be tested (3) comprises a tower crane boom assembly (30) and a movable counterweight assembly (31); the tower crane boom assembly (30) is arranged on a fixed detection base (5), and the movable counterweight assembly (31) is arranged on the tower crane boom assembly (30); The adaptive damping adjustment mechanism (2) comprises an articulated telescopic component (10), a liquid compensation component (11) and an automatic gap adjustment component (12), wherein the articulated telescopic component (10) is arranged at the bottom of the movable counterweight component (31), the liquid compensation component (11) is arranged in the articulated telescopic component (10), and the automatic gap adjustment component (12) is arranged in the articulated telescopic component (10); The drooping direction compensation component (1) comprises a swing base (6), a swing shaft (7), a swing hammer (8) and a windproof cover (45), wherein the swing base (6) is arranged at the bottom of the movable counterweight component (31), the swing hammer (8) is provided with a pendulum hinge seat (9), the swing hammer (8) is rotatably arranged on the swing base (6) via the pendulum hinge seat (9), the swing base (6) and the pendulum hinge seat (9) are connected via the swing shaft (7), the windproof cover (45) is arranged at the bottom of the movable counterweight component (31), the adaptive damping adjustment mechanism (2) is arranged in the windproof cover (45), one side of the windproof cover (45) is provided with an arc-shaped light-transmitting glass (46), and the center position of the windproof cover (45) coincides with the center position of the swing shaft (7); The hinged telescopic assembly (10) comprises a telescopic cylinder (15) and a telescopic push rod (16); the telescopic push rod (16) is slidably engaged in the telescopic cylinder (15); The automatic clearance adjustment component (12) comprises an annular piston (19), a floating valve core (20), a spring bracket (21) and a valve core return spring (22). The annular piston (19) is slidably arranged in the telescopic cylinder (15). The annular piston (19) is provided with a piston middle groove (25). The two ends of the piston middle groove (25) are symmetrically provided with piston slope portions (26). The floating valve core (20) is located in the piston middle groove (25). The two ends of the floating valve core (20) are provided with valve core slope portions (27) matching the piston slope portions (26). The spring bracket (21) is symmetrically arranged at the two ends of the annular piston (19). One of the spring brackets (21) is fixedly connected to the telescopic push rod (16). The valve core return spring (22) is arranged between the spring bracket (21) and the floating valve core (20). The spring bracket (21) is provided with a central through hole (28) and a side through groove (29) for liquid circulation.

2. A tower crane boom deformation detection device according to claim 1, characterized in that: The articulated telescopic assembly (10) further comprises an annular articulated member (13) and a top articulated seat (14); the annular articulated member (13) is fixedly connected to the bottom of the swing hammer (8); bottom articulated seats (23) are symmetrically provided at both ends of the annular articulated member (13); the top articulated seat (14) is fixedly connected to the movable counterweight assembly (31); the telescopic cylinder (15) is articulated to the top articulated seat (14); and the telescopic push rod (16) is articulated to the bottom articulated seat (23).

3. A tower crane boom deformation detection device according to claim 2, characterized in that: The liquid compensation assembly (11) comprises a liquid compensation piston (17) and a liquid compensation spring (18); a countersunk blind hole (24) is provided on the telescopic push rod (16); the liquid compensation piston (17) is slidably engaged in the countersunk blind hole (24); and the liquid compensation spring (18) is provided between the bottom of the countersunk blind hole (24) and the liquid compensation piston (17).

4. A tower crane boom deformation detection device according to claim 3, characterized in that: The tower crane boom assembly (30) comprises a tower crane boom (32) to be tested and a fixed counterweight (33); the tower crane boom (32) to be tested is arranged on a swing base (6); a load moving guide rail (37) is arranged on one side of the tower crane boom (32) to be tested; and the fixed counterweight (33) is arranged on the other side of the tower crane boom (32) to be tested.

5. A tower crane boom deformation detection device according to claim 4, characterized in that: The movable counterweight assembly (31) comprises a load moving slider (34), a load moving slide plate (35) and a movable counterweight load (36); the load moving slider (34) is slidably engaged on a load moving guide rail (37); the load moving slide plate (35) is fixedly connected to the bottom of the load moving slider (34); the movable counterweight load (36) is arranged at the bottom of the load moving slide plate (35); and the swing base (6), the top hinge seat (14) and the windproof cover (45) are all arranged at the bottom of the load moving slide plate (35).

6. A tower crane boom deformation detection device according to claim 5, characterized in that: The deformation feedback component (4) comprises a light receiving module (38) and a light emitting module (39), wherein the light receiving module (38) is arranged on the side of the fixed detection base (5), and the light emitting module (39) is arranged on the pendulum articulated seat (9), and the straight line on which the light emitted by the light emitting module (39) lies intersects with the central axis of the swing shaft (7), and the straight line on which the light emitted by the light emitting module (39) lies is perpendicular to the swing hammer (8).

7. A tower crane boom deformation detection device according to claim 6, characterized in that: The light emitting module (39) is a laser emitter, and the light receiving module (38) is a laser receiver. The light receiving module (38) can provide real-time feedback of the coordinate position of the light emitted by the light emitting module (39) irradiating the light receiving module (38), and feed it back to the background.

8. A tower crane boom deformation detection device according to claim 6, characterized in that: The light emitting module (39) is an ultraviolet emitter, and the light receiving module (38) comprises a dark box (40), a reflector (41), an electronic fluorescent plate (42) and a grille (43); the dark box (40) is provided with a light inlet (44); the reflector (41) is arranged in the dark box (40); the electronic fluorescent plate (42) is arranged in the dark box (40); the grille (43) is arranged in an array in the dark box (40); and the grilles (43) are distributed in a longitudinal array.

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